Page 1 Installer reference guide Daikin Altherma 3 H HT ECH₂O https://daikintechnicaldatahub.eu ETSH16P30E▲▼ EPRA14D▲V3▼ ETSH16P50E▲▼ EPRA16D▲V3▼ ETSHB16P30E▲▼ EPRA18D▲V3▼ ETSHB16P50E▲▼ EPRA14D▲W1▼ EPRA16D▲W1▼ ETSX16P30E▲▼ EPRA18D▲W1▼ ETSX16P50E▲▼ ▲= 1, 2, 3, …, 9, A, B, C, …, Z ETSXB16P30E▲▼ ▼= , , 1, 2, 3, …, 9...
Page 2: Table Of Contents
6.6.2 Power limitation activated by digital inputs....................6.6.3 Power limitation process ..........................6.6.4 BBR16 power limitation..........................Setting up an external temperature sensor........................7 Unit installation Installer reference guide EPRA14~18D + ETSH/X(B)16P30+50EG Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 3 To connect the WLAN cartridge (delivered as accessory) ................141 9.3.15 To connect the solar input..........................142 9.3.16 To connect the DHW output ......................... 142 EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 4 Symptom: The pump is making noise (cavitation)..................258 14.3.7 Symptom: The pressure relief valve opens ....................258 14.3.8 Symptom: The water pressure relief valve leaks ..................258 Installer reference guide EPRA14~18D + ETSH/X(B)16P30+50EG Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 5 16.5 Wiring diagram: Indoor unit............................286 16.6 ESP curve: Indoor unit ..............................292 16.7 Name plate: Indoor unit..............................293 17 Glossary 18 Field settings table EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 6: About The Documentation
Format: Paper (in the box of the indoor unit) ▪ User reference guide: Detailed step-by-step instructions and background information for basic and advanced usage Format: Digital files on https://www.daikin.eu. Use the search function find your model. ▪ Installation manual – Outdoor unit: Installation instructions Format: Paper (in the box of the outdoor unit) ▪...
Page 7: Meaning Of Warnings And Symbols
A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of the latest technical data is available on the Daikin Business Portal (authentication required). Online tools In addition to the documentation set, some online tools are available for installers: ▪...
Page 8: Installer Reference Guide At A Glance
About the units and options ▪ How to identify the units ▪ Possible combinations of units and options Application guidelines Various installation setups of the system EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 9 Note: There is also an installer settings table in the user reference guide. This table has to be filled in by the installer and handed over to the user. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 10: General Safety Precautions
WARNING Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY use accessories, optional equipment and spare parts made or approved by Daikin unless otherwise specified. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation).
Page 11: Installation Site
▪ Use a separate recovery system so that the unit's compressor does NOT have to operate. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 12 ONLY use tools exclusively for the refrigerant type used in the system, this to ensure pressure resistance and prevent foreign materials from entering into the system. ▪ Charge the liquid refrigerant as follows: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 13: Water
If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 14 Install power cables at least 1 meter away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1 meter may NOT be sufficient. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 15 ON and OFF while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase can break the compressor and other parts. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 16: Specific Installer Safety Instructions
WARNING Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation (for example national gas regulation) and are executed ONLY by authorised persons. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O...
Page 17 86]. Piping installation (see "8 Piping installation" [ 88]) WARNING Field piping MUST be in accordance with the instructions from this manual. See "8 Piping installation" [ 88]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 18 ▪ Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply with the applicable legislation. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 19 This maximum allowable hot water temperature shall be selected according to the applicable legislation. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 20 MUST NOT be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly turned ON and OFF by the utility. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 21 "7.3.7 To remove the discharge grille, and put the grille in safety position" [ 84] DANGER: RISK OF BURNING/SCALDING The water in the storage tank and all the connected piping can be very hot. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 22: About The Box
To avoid injury, do NOT touch the air inlet or aluminium fins of the unit. Crane Keep the slings within the marked area to not damage the unit. Forklift or pallet truck Enter the pallet from the heavy side. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 23: To Unpack The Outdoor Unit
After unpacking, carry the unit using the slings attached to the unit. See also: ▪ "4.1.2 To unpack the outdoor unit" [ 23] ▪ "7.3.4 To install the outdoor unit" [ 80] ±150 4× 4.1.2 To unpack the outdoor unit EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 24: To Remove The Accessories From The Outdoor Unit
Compressor cover piece f Installation manual – Outdoor unit g Energy label h Discharge grille (upper + lower part) i Installation manual – Discharge grille EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 25: Indoor Unit
(see "7.2.6 To open the indoor unit" [ 74]). 4.2.1 To unpack the indoor unit EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 26: To Remove The Accessories From The Indoor Unit
Addendum software changelog v Addendum commercial warranty 4.2.3 To handle the indoor unit Use the handles at the back and at the front to carry the unit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 27 3 Use the handles to carry the unit. 4 After carrying the unit remove the handles, add the screw plugs again and insert the thread covers on the plugs. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 28: About The Units And Options
European hydro-split outdoor pair heat pump High water temperature – ambient zone 2 (see operation range) Refrigerant R32 Capacity class Model series Power supply Model series EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 29: Identification Label: Indoor Unit
Model series 5.3 Combining units and options INFORMATION Certain options may NOT be available in your country. 5.3.1 Possible combinations of indoor unit and outdoor unit EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 30: Possible Options For The Outdoor Unit
To enable the power saving consumption control by digital inputs you MUST install the demand PCB. For installation instructions, see the installation manual of the demand PCB and addendum book for optional equipment. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 31 You can install this LAN adapter to control the system via a smartphone app. For installation instructions, see the installation manual of the LAN adapter and the addendum book for optional equipment. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 32 To make the connection of a bivalent heat source to the bivalent heat exchanger easier, you can install a bivalent connector kit. For installation instructions, see the installation manual of the BIV connector kit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 33 A solar drainback kit including solar pump and solar controller can be directly connected to the pressureless storage tank of the indoor unit. For installation instructions, see the installation manual of the solar drainback kit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 34: Application Guidelines
Setting up the power consumption control ▪ Setting up an external temperature sensor ▪ Setting up a bivalent heat source for domestic hot water and space heating EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 35: Setting Up The Space Heating/Cooling System
NOTICE A differential pressure bypass valve can be integrated in the system. Keep in mind that this valve might not be shown on the illustrations. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 36: Single Room
For your daily needs, you can use preset values and schedules. To deviate from your daily needs, you can temporarily overrule the preset values and schedules, or use the holiday mode. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 37: External Room Thermostat)
Code: [C-05] heating or cooling demand. Benefits ▪ Wireless. The Daikin external room thermostat is available in a wireless version. ▪ Efficiency. Although the external room thermostat only sends ON/OFF signals, it is specifically designed for the heat pump system. ▪...
Page 38 OFF condition. No separation between ▪ Code: [C-05] heating or cooling demand. Benefits ▪ Cooling. The heat pump convector offers, besides heating capacity, also excellent cooling capacity. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 39 ▪ The space operation mode is sent by one digital output (X12M/9 and X12M/10) on the indoor unit to: The heat pump convectors The shut-off valve EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 40: Multiple Rooms - One Lwt Zone
Human Comfort Interface (BRC1HHDA) or an external room thermostat), while the other rooms are controlled by so-called thermostatic valves, which open or close depending on the room temperature. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 41 Number of water temperature zones: 0 (Single zone): Main ▪ #: [4.4] ▪ Code: [7-02] Benefits ▪ Easy. Same installation as for one room, but with thermostatic valves. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 42 Compared with underfloor heating or radiators for one room: ▪ Comfort. You can set the desired room temperature, including schedules, for each room via the room thermostats. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 43 Code: [C-07] Number of water temperature zones: 0 (Single zone): Main ▪ #: [4.4] ▪ Code: [7-02] Benefits Compared with heat pump convectors for one room: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 44 INFORMATION To increase comfort and performance, we recommend to install the valve kit option EKVKHPC on each heat pump convector. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 45: Multiple Rooms - Two Lwt Zones
In cooling mode, you can allow the underfloor heating (main zone) to provide refreshment (no real cooling), or NOT allow it. See setup below. Setup Three bizone kit system variations are possible: System without hydraulic separator: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 46 A Additional leaving water temperature zone B Room 1 C Room 2 D Main leaving water temperature zone E Room 3 a Heat pump convectors (+ controllers) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 47 (X12M/19 and X12M/22). The indoor unit will only supply the desired additional leaving water temperature when there is an actual demand. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 48 If the main zone must be shut off during cooling mode to prevent condensation on the floor, set it accordingly. "Bizone kit" [ 231] for more information on configuration of the bizone kit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 49: Setting Up Bivalent Heat Sources
(status of the changeover to external heat source). When the permission is given to the auxiliary boiler, the space heating by the indoor unit is turned OFF. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 50 Make sure the auxiliary boiler and its integration in the system complies with applicable legislation. ▪ Daikin is NOT responsible for incorrect or unsafe situations in the auxiliary boiler system. ▪ Make sure the return water to the heat pump does NOT exceed 60°C. To do so: Set the desired water temperature via the auxiliary boiler controller to maximum 60°C.
Page 51 NOT influenced or turned ON/OFF by direct sunlight. ▪ Frequent changeover may cause corrosion of the auxiliary boiler. Contact the manufacturer of the auxiliary boiler for more information. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 52: Setting Up An Indirect Auxiliary Heat Source For Domestic Hot Water And Space Heating
▪ Make sure the auxiliary boiler and its integration in the system complies with applicable legislation. ▪ Daikin is NOT responsible for incorrect or unsafe situations in the auxiliary boiler system. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O...
Page 53: Setting Up A Solar System Via Drainback Connection
A pressureless solar system can be directly connected to the storage tank via drainback connection. Setup 1 Integrate the solar system as follows: a Drainback solar flow connection (EKSRPS4*) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 54: Setting Up A Solar System Via Bivalent Heat Exchanger
For systems without indirect auxiliary boiler connected to the storage tank, it is mandatory to install an electric backup heater to ensure safe operation for all conditions. Configuration Via the user interface (configuration wizard): EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 55: Setting Up The Storage Tank
Example: If the DHW consumption of a family (4 persons) per day is as follows: ▪ 3 showers ▪ 1 bath ▪ 3 sink volumes Then the DHW consumption = (3×100 l)+(1×150 l)+(3×10 l)=480 l EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 56: Setup And Configuration - Storage Tank
Bivalent heat source, see "6.3 Setting up bivalent heat sources" [ 49] ▪ For more information about optimizing the energy consumption for producing domestic hot water, see "10 Configuration" [ 144]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 57: Dhw Pump For Instant Hot Water
The DHW pump is field-supplied and its installation is the responsibility of the installer. For the electrical wiring, see "9.3.7 To connect the domestic hot water pump" [ 129]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 58: Setting Up The Energy Metering
The flow rate ▪ Setup and configuration: No additional equipment needed. 6.5.2 Consumed energy You can use the following methods to determine the consumed energy: ▪ Calculating EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 59: Normal Kwh Rate Power Supply
▪ Three-phase outdoor unit Three-phase ▪ Backup heater supplied from a three- (*9W: 3N~ 400 V) phase grid (i.e. the backup heater model is *9W) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 60: Preferential Kwh Rate Power Supply
Power meter 2: Measures the rest (i.e. indoor unit and backup heater). Setup ▪ Connect power meter 1 to X15M/5 and X15M/6. ▪ Connect power meter 2 to X15M/9 and X15M/10. "9.3.6 To connect the electricity meters" [ 128]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 61: Setting Up The Power Consumption Control
Allows you to limit the power consumption of the entire heat pump system (sum of indoor unit and backup heater) via 4 digital inputs. ▪ Limitation of power in kW or current in A. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 62: Permanent Power Limitation
Set the desired power limitation level 6.6.2 Power limitation activated by digital inputs Power limitation is also useful in combination with an energy management system. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 63 Application guidelines The power or current of the entire Daikin system is limited dynamically by digital inputs (maximum four steps). Each power limitation level is set via the user interface by limiting one of the following: ▪ Current (in A) ▪...
Page 64: Power Limitation Process
You can combine the BBR16 power limitation with the other kW power consumption controls. If you do so, the unit uses the most restrictive control. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 65: Setting Up An External Temperature Sensor
If this is NOT possible, we recommend to connect a remote outdoor sensor (option EKRSCA1). ▪ Setup: For installation instructions, see the installation manual of the remote outdoor sensor, and the addendum book for optional equipment. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 66 To protect the outdoor unit, the internal sensor of the outdoor unit is always used. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 67: Unit Installation
Do NOT hang the unit on a ceiling. Strong winds (≥18 km/h) blowing against the outdoor unit’s air outlet causes short circuit (suction of discharge air). This may result in: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 68 ▪ Where the voltage fluctuates a lot ▪ In vehicles or vessels ▪ Where acidic or alkaline vapour is present EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 69 The appliance shall be stored so as to prevent mechanical damage and in a well- ventilated room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater). EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 70: Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates
WARNING Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation (for example national gas regulation) and are executed ONLY by authorised persons. 7.1.2 Additional installation site requirements of the outdoor unit in cold climates Protect the outdoor unit against direct snowfall and take care that the outdoor unit is NEVER snowed up.
Page 71 The precise water piping length can be determined using the Hydronic Piping Calculation tool. The Hydronic Piping Calculation tool is part of the Heating Solutions Navigator which can be reached via https://professional.standbyme.daikin.eu. Contact your dealer if you have no access to the Heating Solutions Navigator.
Page 72: Opening And Closing The Units
The transportation stays protect the unit during transport. During installation they must be removed. a Transportation stays (2×) and washers (2×) b Transportation stay (1×) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 73: To Attach The Compressor Cover Piece
1 Put the compressor cover piece on its place. Use the screws (4x) of the transportation stay to fix it (see "7.2.3 To remove the transportation stay" [ 72]). EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 74: To Close The Outdoor Unit
5 Side panel Lower the user interface panel 1 Lower the user interface panel. Open the hinges at the top and slide the interface panel downwards. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 75 Prerequisite: The user interface panel has been lowered. 1 Loosen the screws. 2 Lift up the switch box. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 76 Prerequisite: The user interface panel has been opened and the switch box has been lowered. 1 Open the locking parts of the side panels with a screw driver. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 77 3 Lift the top cover out of its mounting using the two front legs. 4 Remove the top cover. A For models with 500 l storage tank B For models with 300 l storage tank EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 78: To Close The Indoor Unit
Installing the discharge grille. Protecting the unit against snow and wind by installing a snow cover and baffle plates. See "7.1 Preparing the installation site" [ 67]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 79: Precautions When Mounting The Outdoor Unit
When installing on a pedestal, make sure that the discharge grille still can be put in its safety position. See "7.3.7 To remove the discharge grille, and put the grille in safety position" [ 84]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 80: To Install The Outdoor Unit
To avoid injury, do NOT touch the air inlet or aluminium fins of the unit. 1 Carry the unit by its slings, and put it onto the installation structure. ±150 4× 2 Fix the unit to the installation structure. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 81: To Provide Drainage
▪ Install a drain tube heater (field supply). To connect the drain tube heater, see "9.2.2 To connect the electrical wiring to the outdoor unit" [ 109]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 82: To Install The Discharge Grille
Electrical wiring. Before installing the discharge grille, connect the electrical wiring. Install the lower part of the discharge grille 1 Insert the hooks. 2 Insert the ball studs. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 83 4 Align and attach the left side. 5 Align and attach the middle part. 6 Align and attach the right side. 7 Insert the hooks. 8 Insert the ball studs. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 84: To Remove The Discharge Grille, And Put The Grille In Safety Position
"7.3.7 To remove the discharge grille, and put the grille in safety position" [ 84] 1 Remove the upper part of the discharge grille. 4× 2 Remove the lower part of the discharge grille. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 85 4 Align the ball stud and hook on the grille with their counterparts on the unit. 5 Insert the hook. 6 Insert the ball stud. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 86: Mounting The Indoor Unit
1 Open the screw plug. a Screw plug b Assembly wrench c Spillover connector 2 Insert the spillover connector into the screw plug. 3 Mount the spillover connector. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 87 7 Connect the pressure relief valve to an appropriate drain in accordance with the applicable legislation. Ensure that any steam or water that may escape is drained in a frost-protected, safe and observable manner. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 88: Piping Installation
Closed circuit. Use the indoor unit ONLY in a closed water system. Using the system in an open water system will lead to excessive corrosion. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 89 ▪ Drainage – Low points. Provide drain taps at all low points of the system in order to allow complete drainage of the water circuit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 90 See "6.4.4 DHW pump for instant hot water" [ 57]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 91: To Check The Water Volume And Flow Rate
M1…3 Individual motorised valves to control each loop (field supply) Minimum flow rate Check that the minimum flow rate in the installation is guaranteed in all conditions. Minimum required flow rate 22 l/min EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 92: Connecting Water Piping
Deformed pipes can cause the unit to malfunction. Outdoor unit 1 Connect the shut-off valve (with integrated filter) to the outdoor unit water inlet, using thread sealant. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 93 Do NOT exceed the maximum tightening torque (Thread size 1", 25-30 N•m). To avoid damage, apply the necessary countertorque with a suitable tool. ≤Ø7 mm EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 94 5 Connect the domestic hot water in and out pipes to the indoor unit. Do NOT exceed the maximum tightening torque (Thread size 1", 25-30 N•m). To avoid damage, apply the necessary countertorque with a suitable tool. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 95 For rearward facing connections: Support hydraulic lines suitably according to the spatial conditions. This is valid for all water pipes. 7 Install the thermal insulation of the hydraulic block. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 96 A pressure relief valve (field supply) with an opening pressure of maximum 10 bar (=1 MPa) must be installed on the domestic cold water inlet connection in accordance with the applicable legislation. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 97: To Connect The Expansion Vessel
1 Connect a hose with a non-return valve (1/2") and an external manometer (field supply) to a water tap and the fill and drain valve. Secure the hose against slipping off. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 98: To Protect The Water Circuit Against Freezing
Frost can damage the system. To prevent the hydraulic components from freezing, the software is equipped with special frost protection functions, that include the activation of a pump in case of low temperatures: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 99 NOTICE Use ONLY propylene glycol including the required inhibitors, classified as category III as per EN1717. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 100 To install freeze protection valves To protect the field piping against freezing, install the following parts: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 101 In other circumstances (example: when there is a pump failure): The normally closed valves remain open. If the freeze protection valves open, the water from inside the house is also drained. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 102: To Fill The Heat Exchanger Inside The Storage Tank
1 Connect a hose with non-return valve (1/2") to the drainback connection. 2 Fill the storage tank until water spills from the spillover connection. 3 Remove the hose. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 103: To Insulate The Water Piping
The Hydronic Piping Calculation tool is part of the Heating Solutions Navigator which can be reached via https://professional.standbyme.daikin.eu. Please contact your dealer if you have no access to Heating Solutions Navigator. This recommendation ensures good operation of the unit, however, local regulations may differ and shall be followed.
Page 104: Electrical Installation
Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply with the applicable legislation. WARNING ALWAYS use multicore cable for power supply cables. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 105: Guidelines When Connecting The Electrical Wiring
Method 1: Twisting conductor 1 Strip insulation (20 mm) from the wires. 2 Slightly twist the end of the conductor to create a "solid-like" connection. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 106 Terminal b Screw c Flat washer Allowed NOT allowed Tightening torques Outdoor unit: Item Tightening torque (N•m) 1.47 ±10% M4 (earth) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 107: About Electrical Compliance
9.1.5 Overview of electrical connections except external actuators NOTICE Unlike to other indoor unit model types, Daikin Altherma 3 * ECH₂O always needs a dedicated power supply for the indoor unit. It is NOT possible to use the interconnection cable as power supply for the indoor unit.
Page 108: Connections To The Outdoor Unit
Drain tube heater cable Connection for power saving function (only for V3 models) Air thermistor cable "9.2.3 To reposition the air thermistor on the outdoor unit" [ 116]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 109: Specifications Of Standard Wiring Components
An excessive strip length may cause electrical shock or leakage 3 Insert the cables at the back of the unit, and route them through the factory- mounted cable sleeves into the switch box. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 110: Power Supply Cable
▪ Connect the wires to the terminal block. ▪ Fix the cable with a cable tie. Wires: 1N+GND Maximum running current: Refer to name plate on unit. — EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 111 ▪ Connect the wires to the terminal block (make sure the numbers match with the numbers on the indoor unit) and the earth screw. ▪ Fix the cable with a cable tie. Wires: (3+GND)×1.5 mm² — EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 112 ▪ Fix the cable with cable ties. Wires: (2+GND)×0.75 mm². Wiring must be double insulated. Maximum power allowed for drain tube heater = 115 W (0.5 A) — EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 113 ▪ Connect the wires to the terminal block. ▪ Fix the cable with a cable tie. Wires: 3N+GND Maximum running current: Refer to name plate on unit. — EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 114 ▪ Connect the wires to the terminal block (make sure the numbers match with the numbers on the indoor unit) and the earth screw. ▪ Fix the cable with a cable tie. Wires: (3+GND)×1.5 mm² — EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 115 ▪ Fix the cable with cable ties. Wires: (2+GND)×0.75 mm². Wiring must be double insulated. Maximum power allowed for drain tube heater = 115 W (0.5 A) — EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 116: To Reposition The Air Thermistor On The Outdoor Unit
9.2.3 To reposition the air thermistor on the outdoor unit This procedure is only necessary in areas with low ambient temperatures. Required accessory (delivered with the unit): Thermistor fixture. Click EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 117: Connections To The Indoor Unit
For the main zone: ▪ [2.9] Control ▪ [2.A] Ext thermostat type For the additional zone: ▪ [3.A] Ext thermostat type ▪ [3.9] (read-only) Control EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 118 Installation and operation manual of the Human Comfort Interface ▪ Addendum book for optional equipment Wires: 2×(0.75~1.25 mm²) Maximum length: 500 m [2.9] Control [1.6] Room sensor offset EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 119: To Connect The Electrical Wiring To The Indoor Unit
If the switch box is lowered in service position while the electrical installation is done, additional cable length has to be taken into account adequately. The cable routing in normal position is longer than in service position. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 120 It is important that the fixing plate of terminals is NOT in service position, while cables are connected to one of the terminals. Otherwise the cables could be too short. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 121: To Connect The Main Power Supply
2 Connect the main power supply. In case of normal kWh rate power supply Interconnection cable Wires: (3+GND)×1.5 mm² Power supply indoor Wires: 1N+GND unit Maximum running current: 6.3 A — EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 122 Preferential kWh rate power supply contact: 16 V DC detection (voltage supplied by PCB). The voltage-free contact shall ensure the minimum applicable load of 15 V DC, 10 mA. [9.8] Benefit kWh power supply EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 123: To Connect The Backup Heater Power Supply
[9.3] Backup heater WARNING The backup heater MUST have a dedicated power supply and MUST be protected by the safety devices required by the applicable legislation. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 124: Running Current
Z less than or equal to Z Connect the backup heater power supply as follows: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 125 Electrical installation Model (power supply) Connections to backup heater power supply *3V (3V: 1N~ 230 V) SWB2 Q1DI 1N~, 50 Hz 230 V AC EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 126: To Connect The Backup Heater To The Main Unit
1 Open the following (see "7.2.6 To open the indoor unit" [ 74]): 1 User interface panel 2 Switch box 3 Switch box cover 4 Top cover 5 Side panel EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 127: To Connect The Shut-Off Valve
2 Connect the valve control cable to the appropriate terminals as shown in the illustration below. NOTICE Wiring is different for a NC (normally closed) valve and a NO (normally open) valve. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 128: To Connect The Electricity Meters
3 Switch box cover 4 Top cover 5 Side panel 2 Connect the electricity meters cable to the appropriate terminals as shown in the illustration below. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 129: To Connect The Domestic Hot Water Pump
3 Switch box cover 4 Top cover 5 Side panel 2 Connect the domestic hot water pump cable to the appropriate terminals as shown in the illustration below. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 130: To Connect The Alarm Output
3 Switch box cover 4 Top cover 5 Side panel 2 Connect the alarm output cable to the appropriate terminals as shown in the illustration below. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 131: To Connect The Space Cooling/Heating On/Off Output
3 Switch box cover 4 Top cover 5 Side panel 2 Connect the space cooling/heating ON/OFF output cable to the appropriate terminals as shown in the illustration below. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 132: To Connect The Changeover To External Heat Source
4 Top cover 5 Side panel 2 Connect the changeover to external heat source cable to the appropriate terminals as shown in the illustration below. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 133: To Connect The Power Consumption Digital Inputs
74]): 1 User interface panel 2 Switch box 3 Switch box cover 4 Top cover 5 Side panel 2 Install the switch box metal insert. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 134 4 Fix the cable with cable ties to the cable tie mountings. General information, "9.3.1 To connect the electrical wiring to the indoor unit" [ 119]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 135: To Connect The Safety Thermostat (Normally Closed Contact)
X15M 3 Fix the cable with cable ties to the cable tie mountings. General information, "9.3.1 To connect the electrical wiring to the indoor unit" [ 119]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 136: Smart Grid
([9.A.2] Electricity meter 2 = None) In case of low voltage Smart Grid contacts Wires (Smart Grid pulse meter): 0.5 mm² Wires (low voltage Smart Grid contacts): 0.5 mm² EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 137 X15M.3 X15M.10 3 4 5 6 9 10 X15M.9 X15M X15M.6 S11S X15M.5 3 Fix the cables with cable ties to the cable tie mountings. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 138 1 Install the switch box metal insert. 2 Loosen the cables connected to the terminal of the Smart Grid relay kit (EKRELSG) and remove the terminal. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 139 Electrical installation 3 Install the components of the Smart Grid relay kit as follows: 2× 2× EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 140 X12M.25 X12M.24 X15M.5 X15M.6 4 Connect the low voltage wiring as follows: X15M.10 X15M.9 9 10 X15M 5 Connect the high voltage wiring as follows: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 141: To Connect The Wlan Cartridge (Delivered As Accessory)
9.3.14 To connect the WLAN cartridge (delivered as accessory) [D] Wireless gateway 1 Insert the WLAN cartridge into the cartridge slot on the user interface of the indoor unit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 142: To Connect The Solar Input
9.3.16 To connect the DHW output Wires: 2×0.75 mm² Maximum running current: 0.3 A, 230 V AC — 1 Open the following (see "7.2.6 To open the indoor unit" [ 74]): EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 143 0,3 A - 230 V AC 3 Fix the cable with cable ties to the cable tie mountings. General information, "9.3.1 To connect the electrical wiring to the indoor unit" [ 119]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 144: Configuration
First time – Configuration wizard. When you turn ON the user interface for the first time (via the unit), the configuration wizard starts to help you configure the system. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 145: To Access The Most Used Commands
▪ Confirm the pin code and proceed. Installer pin code The Installer pin code is 5678. Additional menu items and installer settings are now available. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 146 3 Turn the left dial to select the first part of the setting and confirm by pressing the dial. 4 Turn the left dial to select the second part of the setting 01 15 EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 147: To Connect The Pc Cable To The Switch Box
2 Connect the plug of the cable to X10A on A1P of the switch box of the indoor unit. X10A 3 Pay special attention to the position of the plug! EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 148: Configuration Wizard
168] Control [2.9] Setpoint mode [2.4] Heating WD curve [2.5] (if applicable) Cooling WD curve [2.6] (if applicable) Schedule [2.1] WD curve type [2.E] EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 149: Possible Screens
Main menu screen c Lower level screens: c1: Setpoint screen c2: Detailed screen with values c3: Screen with weather-dependent curve c4: Screen with schedule EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 150: Home Screen
Smart energy is currently being used for domestic hot water. Space operation mode Cooling Heating Outdoor / quiet mode Measured outdoor temperature Quiet mode active Outdoor unit EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 151 Installed heat emitter type: Underfloor heating Fancoil unit Radiator Leaving water temperature setpoint EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 152: Main Menu Screen
Shows the applicable symbol of your unit. cooling Put the unit in heating mode or cooling mode. You cannot change the mode on heating only models. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 153: Menu Screen
The setpoint screen is displayed for screens describing system components that need a setpoint value. Examples [1] Room temperature screen [2] Main zone screen °C °C – – Room Main zone EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 154: Detailed Screen With Values
Selected setting and value Possible actions on this screen Go through the list of settings. Change the value. Go to the next setting. Confirm changes and proceed. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 155: Schedule Screen: Example
To clear the content of the week schedule 1 Select the name of the current schedule. User defined 1 2 Select Delete. Delete Rename Select 3 Select OK to confirm. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 156 In this example, Monday is the first day you programmed. Thus, the last programmed action is valid up to the first action of next Monday. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 157 5 Repeat this action for all other weekdays. — User defined 1 To program the schedule for Saturday and copy it to Sunday 1 Select Saturday. 2 Select Edit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 158 The schedule name can contain up to 15 characters. 5 Confirm the new name. INFORMATION Not all schedules can be renamed. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 159: Weather-Dependent Curve
See "10.4.4 Using weather-dependent curves" [ 162]. 10.4.2 2-points curve Define the weather-dependent curve with these two setpoints: ▪ Setpoint (X1, Y2) ▪ Setpoint (X2, Y1) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 160: Slope-Offset Curve
Examples Weather-dependent curve when slope is selected: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 161 Select slope or offset. Increase or decrease the slope/offset. When slope is selected: set slope and go to offset. When offset is selected: set offset. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 162: Using Weather-Dependent Curves
[3.5] Additional zone > Heating WD curve Additional zone – Cooling [3.6] Additional zone > Cooling WD curve Tank Restriction: Only available to installers. [5.C] Tank > WD curve EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 163: Settings Menu
159]. 10.5 Settings menu You can set additional settings using the main menu screen and its submenus. The most important settings are presented here. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 164: Malfunctioning
Example" [ 155]. Cooling schedule Only applicable for reversible models. Define a cooling schedule of the room temperature in [1.3] Cooling schedule. "10.3.7 Schedule screen: Example" [ 155]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 165 Under leaving water temperature control, room frost protection is NOT guaranteed. However, if room antifrost [2‑06] is activated, limited frost protection by the unit is possible: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 166 The external room thermostat is ▪ the temperature setpoint of the "Thermo OFF", and leaving water will be lowered. ▪ Outdoor temperature drops below 6°C EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 167 [1.5.1] [3-07] Heating minimum [1.5.2] [3-06] Heating maximum [1.5.3] [3-09] Cooling minimum [1.5.4] [3-08] Cooling maximum Room sensor offset Only applicable in room thermostat control. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 168: Main Zone
[9-0A] Heating comfort setpoint ▪ [3-07]~[3-06]°C [1.9.2] [9-0B] Cooling comfort setpoint ▪ [3-09]~[3-08]°C 10.5.3 Main zone Overview The following items are listed in the submenu: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 169 Define a heating temperature schedule for the main zone via [2.2] Heating schedule. "10.3.7 Schedule screen: Example" [ 155]. Cooling schedule Define a cooling temperature schedule for the main zone via [2.3] Cooling schedule. "10.3.7 Schedule screen: Example" [ 155]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 170 10°C. Heating WD curve Set weather-dependent heating for the main zone (if [2.4]=1 or 2): EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 171 Note: This value should be lower than [1‑02] as for high outdoor temperatures less warm water is required. Cooling WD curve Set weather-dependent cooling for the main zone (if [2.4]=2): EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 172 It is important to set Emitter type correctly and in accordance with your system layout. The target delta T for the main zone depends on it. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 173 Setpoint range To prevent a wrong (i.e. too hot or too cold) leaving water temperature for the main leaving water temperature zone, limit its temperature range. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 174 ▪ Else: 37°C~55°C [2.8.3] [9-03] Cooling minimum: ▪ 5°C~18°C [2.8.4] [9-02] Cooling maximum: ▪ 18°C~22°C Control Define how the operation of the unit is controlled. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 175 Delta T is the absolute value of the temperature difference between the leaving water and entering water. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 176 When using the room thermostat functionality, the customer needs to set the desired room temperature. The unit will supply hot water to the heat emitters and the room will be heated. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 177 The following is only applicable in case of 2 leaving water temperature zones. In case of 1 leaving water temperature zone, connect the shut-off valve to the heating/cooling output. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 178: Additional Zone
159] and "10.4.3 Slope-offset curve" [ 160]. Code Description [2.E] ▪ 2-points ▪ Slope-Offset 10.5.4 Additional zone Overview The following items are listed in the submenu: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 179 155]. Setpoint mode The setpoint mode of the additional zone can be independently set from the setpoint mode of the main zone. "Setpoint mode" [ 170]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 180 Note: This value should be lower than [0‑01] as for high outdoor temperatures less warm water is required. Cooling WD curve Set weather-dependent cooling for the additional zone (if [3.4]=2): EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 181 2: Radiator The setting of the emitter type has an influence on the space heating setpoint range and the target delta T in heating as follows: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 182 External room thermostat,or Room thermostat. Ext thermostat type Only applicable in external room thermostat control. Also see "10.5.3 Main zone" [ 168]. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 183: Space Heating/Cooling
2-points ▪ Slope-Offset 10.5.5 Space heating/cooling INFORMATION Cooling is only applicable in case of reversible models. Overview The following items are listed in the submenu: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 184 While the unit is in operation, the status indicator will light up blue constantly. To set the space operation mode 1 Go to [4.1]: Space heating/cooling > Operation mode EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 185 If the outdoor temperature is between the Space heating off temperature and the Space cooling off temperature, the operation mode remains unchanged. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 186 The space operation only changes from heating to cooling when the room temperature rises above the desired cooling temperature added by the hysteresis value. ▪ Range: 1°C~10°C EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 187 In heating: a Additional LWT zone: Highest temperature b Main LWT zone: Lowest temperature c Mixing station EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 188 ON or OFF condition. Remark: Continuous pump operation requires more energy than sample or request pump operation. a Space heating/cooling control b Off c On d Pump operation EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 189 In this part of the menu it can be read out which type of unit is used: Code Description [4.6] [E‑02] Unit type: ▪ 0 Reversible ▪ 1 Heating only EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 190 6: 80% pump speed during sampling ▪ 7: 70% pump speed during sampling ▪ 8: 60% pump speed during sampling The maximum values depend on the unit type: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 191 Use this setting to compensate for possible heat losses of the building due to the evaporation of melted ice or snow. (e.g. in cold region countries). EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 192: Tank
Room frost protection [1.4] prevents the room from getting too cold. For more information about room frost protection, see "10.5.2 Room" [ 164]. 10.5.6 Tank Overview The following items are listed in the submenu: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 193 When powerful operation is active, the risk of space heating/cooling and capacity shortage comfort problems is significant. In case of frequent domestic hot water operation, frequent and long space heating/cooling interruptions will happen. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 194 ▪ 4: Thursday ▪ 5: Friday ▪ 6: Saturday ▪ 7: Sunday [5.7.3] [2‑02] Start time [5.7.4] [2‑03] Tank setpoint: 60°C [5.7.5] [2‑04] Duration: 40~60 minutes EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 195 During disinfection of the water inside the domestic hot water heat exchanger coil by periodically heating storage tank specific temperature, DHW temperature can exceed this maximum temperature. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 196 Code Description [5.9] [6-00] Heat pump ON hysteresis ▪ 2°C~40°C Setpoint mode Code Description [5.B] Setpoint mode: ▪ Fixed ▪ Weather dependent EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 197 HP MAX Heat pump OFF temperature (T −[6-01]) HP OFF HP MAX Heat pump ON temperature (T −[6-00]) HP ON HP OFF Domestic hot water temperature EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 198: User Settings
[7] User settings Space heating/cooling Tank [7.1] Language User settings [7.2] Time/date Information Installer settings [7.3] Holiday [7.4] Quiet [7.5] Electricity price [7.6] Gas price EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 199 ▪ Select On. 2 Set the first day of your holiday. — ▪ Go to [7.3.2]: From. ▪ Select a date. ▪ Confirm the changes. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 200 ▪ You have programmed a quiet mode schedule: During the night: Most quiet. During the day: Off to ensure the heating/cooling capacity of the system. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 201 INFORMATION Price value ranging from 0.00~990 valuta/kWh (with 2 significant values). INFORMATION If no schedule is set, the Electricity price for High is taken into account. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 202 Renewable heat incentive per kWh Calculation of the gas price Gas price=Actual gas price+(Incentive/kWh×0.9) Gas price=4.08+(5×0.9) Gas price=8.58 Calculation of the electricity price Electricity price=Actual electricity price+Incentive/kWh Electricity price=12.49+5 EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 203: Information
Reset the configuration settings stored in the MMI (user interface of the indoor unit). Example: Energy meterings, holiday settings. INFORMATION This does not reset the configuration settings and field settings of the indoor unit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 204 Return water temperature [°C] Storage tank temperature [°C] Ambient temperature [°C] Leaving water temperature after storage tank [°C] Water pressure [bar] Water volume flow rate [l/min] EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 205: Installer Settings
[8.B] Piping diagram Real-time sensor and actuator information of the main system components 10.5.9 Installer settings Overview The following items are listed in the submenu: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 206 This setting is read only. Code Description [9.2.1] [E‑05] ▪ Integrated The backup heater will also be used for [E‑06] domestic hot water heating. [E‑07] EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 207 When measuring the resistance value of each heater, you can set the exact heater capacity and this will lead to more accurate energy data. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 208 If the storage temperature setpoint is higher than 50°C and no auxiliary boiler is installed, Daikin recommends NOT to disable the backup heater second step because it will have a big impact on the required time for the unit to heat up the storage tank.
Page 209 The backup heater will ONLY assist if you increase the equilibrium temperature [5‑01] to the required ambient temperature you need to reach the higher setpoint. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 210 Malfunctioning main menu screen. To keep energy consumption low, we recommend to set Emergency to auto SH reduced/DHW off if the house is unattended for longer periods. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 211 This is important in case glycol is used to protect the water circuit against freezing. If NOT set correctly, the liquid in the piping can freeze. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 212 [8-02]: Anti-recycle timer [8-01] [8-02] 1 Heat pump domestic water heating mode (1=active, 0=not active) 2 Hot water request for heat pump (1=request, 0=no request) t Time EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 213 Range: 0~95 minutes Water pipe freeze prevention Only relevant for installations with water piping outdoors. This function tries to protect outdoor water piping from freezing. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 214 In case of room buffering, the room will heat up or cool down to the comfort setpoint. In case of tank buffering, the tank will heat up to the maximum tank temperature. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 215 Restriction: Only applicable if [9.8.4] is NOT set to Smart Grid. Allow pump: ▪ 0 No: Pump is forced off ▪ 1 Yes: No limitation EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 216 See also below table (Smart Grid operation modes). [9.8.6] Restriction: Only applicable if [9.8.4]=Smart Grid. To set if electrical heaters are allowed. Allow electrical heaters: ▪ ▪ EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 217 2 Inputs: Enabled: You can set up to four different power limitation values (in A or kW) to which the system power consumption will be limited when the corresponding digital input asks. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 218 Limits when [9.9.1]=Inputs and [9.9.2]=kW: Code Description [9.9.9] [5-09] Limit 1: 0 kW~20 kW [9.9.A] [5-0A] Limit 2: 0 kW~20 kW [9.9.B] [5-0B] Limit 3: 0 kW~20 kW [9.9.C] [5-0C] Limit 4: 0 kW~20 kW EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 219 Note: This is different from the permanent power limitation, which is always changeable. BBR16 activation Code Description [9.9.F] [7-07] BBR16 activation: ▪ 0: disabled ▪ 1: enabled EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 220 ▪ 0 None: NOT installed ▪ 1 1/10kWh: Installed ▪ 2 1/kWh: Installed ▪ 3 10/kWh: Installed ▪ 4 100/kWh: Installed ▪ 5 1000/kWh: Installed EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 221: Averaging Time
The outdoor temperature is averaged over the selected time period. Code Description [9.B.3] [1-0A] Averaging time: ▪ 0: No averaging ▪ 1: 12 hours ▪ 2: 24 hours ▪ 3: 48 hours ▪ 4: 72 hours EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 222 INFORMATION Direct (SH) is only possible in case of 1 leaving water temperature zone with: ▪ room thermostat control, OR ▪ external room thermostat control. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 223 To determine the value of [C‑03], proceed as follows: 1 Determine the COP (= coefficient of performance) using the formula: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 224 Code Description [7.5.1] User settings > Electricity price > High [7.5.2] User settings > Electricity price > Medium [7.5.3] User settings > Electricity price > EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 225 EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 226 ▪ Unit is in heating operation and has been running for a few minutes ▪ Outdoor ambient temperature is low enough EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 227 To export MMI settings 1 Open the user interface panel and insert a USB memory stick. — 2 On the user interface, go to [9.N] Export MMI settings. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 228 Space heating by tank heating support Storage tank temperature tank In this example: Tank setpoint (may differ depending on space heating setpoint) Boiler off temperature (T +3+[7‑0D]) B Off EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 229 Range: 0 kW~63 kW (step: 1 kW) The capacity should be limited to the capacity provided by the heat pump. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 230 Equilibrium temperature: Outdoor temperature below which operation of the backup heater (and tank heating support in case of a bivalent system) is allowed. Range: –15°C~35°C EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 231 0 No : The system only has a main zone. ▪ 1 N/A ▪ 2 Yes: A bizone kit is installed in order to add an additional temperature zone. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 232 The speed of the main zone pump can be fixed with this setting. Code Description [9.P.4] [7-0B] Main zone pump fixed PWM: Fixed pump speed for main (mixed) zone. ▪ 20~95% (default: 95) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 233: Commissioning
"To change the user permission level" [ 145]. [B] User profile Installer settings Commissioning User profile Operation Malfunctioning 10.5.12 Operation Overview The following items are listed in the submenu: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 234: Wlan
The user can then control the system via the ONECTA app. This needs the following components in case of WLAN cartridge: This needs the following components in case of WLAN module: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 235 This screen exits automatically after 10 min, or when you press (and confirm): Are you sure you want to exit AP mode? Back [D.2] Reboot: Reboot the WLAN cartridge/module. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 236 Connected to [WLAN_SSID] [D.6] Cloud connection: Read out the status of the connection to the cloud. Code Description [D.6] Cloud connection: ▪ Not connected ▪ Connected EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 237: Menu Structure: Overview User Settings
(**) Only accessible by installer (***) Only applicable when WLAN is installed INFORMATION Depending on the selected installer settings and unit type, settings will be visible/ invisible. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 238: Menu Structure: Overview Installer Settings
Mixing valve turning time (*) Only applicable in Swedish language. INFORMATION Depending on the selected installer settings and unit type, settings will be visible/ invisible. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 239: Commissioning
11 Commissioning NOTICE General commissioning checklist. Next to the commissioning instructions in this chapter, a general commissioning checklist is also available on the Daikin Business Portal (authentication required). The general commissioning checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during commissioning and hand-over to the user.
Page 240: Precautions When Commissioning
There are NO loose connections or damaged electrical components in the switch box. There are NO damaged components or squeezed pipes on the inside of the indoor and outdoor units. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 241: Checklist During Commissioning
Check the function of the valve motor of M1S and M2S. Replace the valve motor if necessary. During pump test run, the unit can operate below the minimum required flow rate. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 242: Air Purge Function
If necessary, repeat performing the automatic air purge until you are sure that all air is removed from the system. During air purge function, pump speed limitation [9‑0D] is NOT applicable. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 243 3 In the menu, set Type = Manual. 4 Select Start air purge. 5 Select OK to confirm. Result: The air purge starts. It stops automatically when ready. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 244: Operation Test Run
"To change — the user permission level" [ 145]. 2 Go to [A.1]: Commissioning > Operation test run. 3 Select a test from the list. Example: Heating. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 245: Actuator Test Run
For the backup heater test run, make sure that at least one of the two mixing valves of the unit is open during the test. Otherwise the thermal cut-out of the backup heater may be triggered. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 246: Underfloor Heating Screed Dryout
Duration and temperature The installer can program up to 20 steps. For each step he needs to enter: 1 the duration in hours, up to 72 hours, EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 247 [2‑06] to "0", and KEEP it disabled until the screed dryout has finished. Ignoring this notice will result in cracking of the screed. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 248 In case of a power failure, the U3 error is not generated. When power is restored, the unit automatically restarts the latest step and continues the program. Stop UFH screed dryout To manually stop underfloor heating screed dryout: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 249: To Set Up Bivalent Heat Sources
[C-02] set to 0. HINT: If field code [C-02] is set to 0 and no backup heater is connected, error UA 17 is output at AL 3 * ECH2O. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 250: Hand-Over To The User
Show the user what to do for the maintenance of the unit. ▪ Explain about energy saving tips to the user as described in the operation manual. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 251: Maintenance And Service
PCB. 13.3 Yearly maintenance 13.3.1 Yearly maintenance outdoor unit: overview Check the following at least once a year: ▪ Heat exchanger EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 252: Yearly Maintenance Outdoor Unit: Instructions
Water pressure relief valve Open the valve and check if it operates correctly. The water may be very hot! Checkpoints are: EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 253 2 Switch box 2 Check if the red level indicator is visible. If NOT, add water to the storage tank (see "8.2.8 To fill the storage tank" [ 102]). EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 254: Troubleshooting
Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring. 14.2 Precautions when troubleshooting DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 255: Solving Problems Based On Symptoms
In some cases, it is normal that the unit decides to use a low water flow. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 256: Symptom: Hot Water Does Not Reach The Desired Temperature
Change the schedule to not start both disinfection) and space heating operation modes at the same moment. operation are scheduled to start at the same time. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 257: Symptom: The System Is Making Gurgling Noises After Commissioning
If you cannot deblock the rotor of the pump with this method, you will need to disassemble the pump and turn the rotor by hand. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 258: Symptom: The Pump Is Making Noise (Cavitation)
▪ If the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your dealer. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 259: Symptom: The Space Is Not Sufficiently Heated At Low Outdoor Temperatures
Increase the "space heating priority temperature" to activate backup heater operation at a higher outdoor temperature. [9.6.3]: Installer settings > Balancing > Priority temperature [5‑03] EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 260: Symptom: Tank Disinfection Function Is Not Completed Correctly (Ah-Error)
14.4.2 To check the malfunction history Conditions: The user permission level is set to advanced end user. 1 Go to [8.2]: Information > Malfunction history. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 261: Error Codes: Overview
Overheating mixed water circuit (thermostat) 8H-03 Overheating water circuit (thermostat) 8H-08 Overheating water circuit A1-00 Zero cross detection problem A5-00 OU: High pressure peak cut / freeze protection problem EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 262 Malfunction of low pressure switch H5-00 Malfunction of compressor overload protection H6-00 OU: Malfunction of position detection sensor H8-00 OU: Malfunction of compressor input (CT) system EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 263 OU: Shortage of refrigerant U1-00 Malfunction by reverse phase/open-phase U2-00 OU: Defect of power supply voltage U3-00 Underfloor heating screed dryout function not completed correctly EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 264 Minimum required flow rate 22 l/min INFORMATION Error AJ-03 is reset automatically from the moment there is a normal tank heat-up. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 265 If the software is not successfully updated then you must make sure that your USB device has the FAT32 format. INFORMATION The user interface will display how to reset an error code. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 266: Disposal
"7.3.6 To install the discharge grille" [ 82] ▪ "7.3.7 To remove the discharge grille, and put the grille in safety position" [ 84] 1 Make sure the unit is not running. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 267: To Manually Open The Electronic Expansion Valves
3 Turn the EEV magnet anticlockwise to the fully open position of the valve. If you are not sure about what the open position is, turn the valve in its middle position so that refrigerant can pass. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 268: Recovery Mode - In Case Of Epra-Dav3* And Epra-Daw1* Models (7-Leds Display)
Press BS1 once. H1P keeps flashing, indicating that you are in a mode that does not allow compressor operation. = OFF, = ON, and = flashing. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 269 / solenoid valves to their initial state. INFORMATION Power OFF. When power is turned OFF and turned ON again, the recovery mode is deactivated automatically. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 270: Recovery Mode - In Case Of Epra-Dbw1* Models (7-Segments Display)
Display the current value. Press BS3 once. Change the value to 2. Press BS2 once. Enter the value in the system. Press BS3 once. Confirm. Press BS3 once. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 271: To Drain The Storage Tank
15.2 To drain the storage tank DANGER: RISK OF BURNING/SCALDING The water in the storage tank and all the connected piping can be very hot. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 272: To Drain The Storage Tank Without A Connected Pressureless Solar System
2 Open the screw plug of the upper connection on the front. 3 Insert the screw plug into the fill and drain kit and secure with the clip contained in the option kit. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 273 1 Place an appropriate tray under the drain connection to collect water spillage. 2 Open the screw plug and remove the sealing plug and IMMEDIATELY close with the previously prepared screw plug with drain connection. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 274: To Drain The Storage Tank With A Connected Pressureless Solar System
Sealing plug c Fill and drain kit 5 Open the valve of the fill and drain kit. 6 Switch the drain connection valve to standard position. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 275: Technical Data
Technical data 16 Technical data A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of the latest technical data is available on the Daikin Business Portal (authentication required). In this chapter 16.1...
Page 276: Service Space: Outdoor Unit
Height of obstacles B and D NOT allowed NOTICE Cascading outdoor units. Installation layouts with multiple outdoor units in combination with floor-standing indoor units are NOT allowed. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 277: Piping Diagram: Outdoor Unit
Y3E Electronic expansion valve (injection) Y1S Solenoid valve (4-way valve) Y2S Solenoid valve (low pressure bypass) Y3S Solenoid valve (hot gas bypass) Y4S Solenoid valve (liquid injection) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 278: Piping Diagram: Indoor Unit
R2T Thermistor (backup heater – water OUT) R5T, R8T Thermistor (tank) R7T Thermistor (tank - water OUT) S1L Flow switch Screw connection Flare connection Quick coupling Brazed connection EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 279: Wiring Diagram: Outdoor Unit
Right side view See note *** See note *** Notes: Symbols: Live Neutral Protective earth Noiseless earth Field wiring Option Terminal strip Terminal Connector Connection EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 280 C1~C4 (A1P, A2P) Capacitor DS1 (A1P) DIP switch Drain tube heater (field supply) E1HHEX~E3HHEX Plate heat exchanger heaters Field fuse (field supply) F1U~F4U (A2P) Fuse EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 281 High pressure switch S1PL Low pressure switch Current transfo TC (A2P) Signal transmission circuit V1D~V4D (A1P) Diode V1R (A1P) IGBT power module V2R (A1P) Diode module EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 282 Magnetic relay (E1HC) K2M, K11M (A2P) Magnetic contactor L1R~L4R Reactor Compressor motor Fan motor PS (A2P) Switching power supply Q1DI Earth leakage circuit breaker (30 mA) (field supply) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 283 BS1~BS3 (A1P) Push button switch C1~C619 (A1P) Capacitor DS1 (A1P) DIP switch Drain tube heater (field supply) E1HHEX Plate heat exchanger heater Field fuse (field supply) EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 284 Low pressure switch SEG* (A1P) 7-segment display Current transfo TC (A1P) Signal transmission circuit V1D~V3D (A1P) Diode V1R, V2R (A1P) Diode module V3R~V5R (A1P) IGBT power module EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 285 Solenoid valve (4‑way valve) Solenoid valve (low pressure bypass) Solenoid valve (hot gas bypass) Solenoid valve (liquid injection) Z1C~Z11C Noise filter (ferrite core) Z1F~Z5F (A1P, A2P) Noise filter EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 286: Wiring Diagram: Indoor Unit
Safety thermostat Safety thermostat Main LWT Main leaving water temperature On/OFF thermostat (wired) On/OFF thermostat (wired) On/OFF thermostat (wireless) On/OFF thermostat (wireless) Ext. thermistor External thermistor EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 287 # Domestic hot water pump # 2-way valve for cooling mode PC (A15P) * Power circuit Thermal protector backup heater # Safety thermostat Q*DI # Earth leakage circuit breaker EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 288 Alarm output Alarm output BUH option Backup heater option BUH option only for * Backup heater option only for * Bizone mixing kit Bizone mixing kit EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 289 Space C/H On/OFF output Space cooling/heating On/OFF output SWB1 Switch box (4) Option PCBs (4) Option PCBs Only for demand PCB option Only for demand PCB option EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 290 Only for wireless On/OFF thermostat Only for wireless On/OFF thermostat (6) Backup heater power supply (6) Backup heater power supply Only for *** Only for *** SWB2 Switch box EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 291 Power limitation A8P: X801M: 4-5 user interface communication demand input 4 signal 2 core 2x0.75 Only for LAN adapter A13P: P1-P2 user interface communication 4D132247 D EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 292: Esp Curve: Indoor Unit
See also the minimum and maximum allowed water flow range in the technical specifications. ▪ Make sure water quality complies with EU directive 2020/2184. EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 293: Name Plate: Indoor Unit
Max. operating pressure PMS (drinking water installation) m Nominal voltage U n Rated current of fuse o Protection type p Backup heater (optional) q Part number r Revision EPRA14~18D + ETSH/X(B)16P30+50EG Installer reference guide Daikin Altherma 3 H HT ECH₂O 4P759883-1A – 2025.03...
Page 294: Glossary
Optional equipment Equipment made or approved by Daikin that can be combined with the product according to the instructions in the accompanying documentation. Field supply Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation.
Page 295: Field Settings Table
1/19 Field settings table Applicable indoor units ETSH16P30E▲▼ ETSH16P50E▲▼ ETSHB16P30E▲▼ ETSHB16P50E▲▼ ETSX16P30E▲▼ ETSX16P50E▲▼ ETSXB16P30E▲▼ ETSXB16P50E▲▼ Notes (*1) *X* (*2) *H* (*3) (*4) EKECBUA3V (*5) EKECBUA6V (*6) EKECBUA9W BUH less (*7) 300L tank (*8) E model (*E▲) (*9) E7 model (*E▲7) (*10) ▲...
Page 296 2/19 Field settings table Breadcrumb Setting name Range, step Default value Room └─ Antifrost 1.4.1 [2-06] Activation 0: No 1: Yes 1.4.2 [2-05] Room setpoint 4~16°C, step: 1°C 8°C └─ Setpoint range 1.5.1 [3-07] Heating minimum 12~18°C, step: 1°C 12°C 1.5.2 [3-06] Heating maximum...
Page 297 3/19 Field settings table Breadcrumb Setting name Range, step Default value [2-0C] Emitter type 0: Underfloor heating 1: Fancoil unit 2: Radiator └─ Setpoint range 2.8.1 [9-01] Heating minimum 15~37°C, step: 1°C 25°C 2.8.2 [9-00] Heating maximum R/W ([2- [2-0C]=2: 0C] ≠...
Page 298 4/19 Field settings table Breadcrumb Setting name Range, step Default value [0-02] High ambient temp. for LWT add zone heating WD curve. 10~25°C, step: 1°C 15°C [0-03] Low ambient temp. for LWT add zone heating WD curve. -40~5°C, step: 1°C -15°C └─...
Page 299 5/19 Field settings table Breadcrumb Setting name Range, step Default value [9-0D] Pump speed limitation 0~8, step:1 0 : No limitation 1~4 : 90~60% pump speed 5~8 : 90~60% pump speed during sampling 6 80% pump speed Space heating / cooling [F-00] Pump outside range 0: Restricted...
Page 300 6/19 Field settings table Breadcrumb Setting name Range, step Default value [6-01] Margin 0~10°C, step: 1°C 0°C WD curve type 0: 2-points 1: Slope-Offset User settings └─ Quiet 7.4.1 mode 0: OFF 1: Manual 2: Automatic 7.4.3 Level 0: Quiet 1: More Quiet 2: Most Quiet └─...
Page 301 7/19 Field settings table Breadcrumb Setting name Range, step Default value 9.1.4.4 [6-04] Additional capacity step 2 R/W (*5, 0~10kW, step: 0,2kW 0kW (*4) R/O (*4, 3kW (*7) 4kW (*5) 6kW (*6) └─ Main zone 9.1.5.1 [2-0C] Emitter type 0: Underfloor heating 1: Fancoil unit 2: Radiator 9.1.5.2...
Page 302 8/19 Field settings table Breadcrumb Setting name Range, step Default value 9.1.9 [0-00] Leaving water value for high ambient temp. for LWT add zone [9-05]~min(45,[9-06])°C, step: 1°C heating WD curve. [2-0C]=0 25°C [2-0C]=1 35°C [2-0C]=2 35°C 9.1.9 [0-01] Leaving water value for low ambient temp. for LWT add zone [9-05]~[9-06]°C, step: 1°C heating WD curve.
Page 303 9/19 Field settings table Breadcrumb Setting name Range, step Default value 9.3.4 [6-03] Capacity step 1 0~10kW, step: 0,2kW 2kW (*5) 3kW (*4, *6, *7) 9.3.5 [6-04] Additional capacity step 2 R/W (*5, 0~10kW, step: 0,2kW 0kW (*4) R/O (*4, 3kW (*7) 4kW (*5) 6kW (*6)
Page 304 10/19 Field settings table Breadcrumb Setting name Range, step Default value 9.8.4 [D-01] Benefit kWh power supply 0: No 1: Open 2: Closed 3: Smart Grid 9.8.6 Allow electric heaters 0: No 1: Yes 9.8.7 Enable Room buffering 0: No 1: Yes 9.8.8 Limit setting kW...
Page 305 11/19 Field settings table Breadcrumb Setting name Range, step Default value 9.B.3 [1-0A] Averaging time 0: No 1: 12 h 2: 24 h 3: 48 h 4: 72 h └─ Bivalent 9.C.1 [C-02] Bivalent 0: Off 1: Direct (SH) 2: Indirect (DHW) (*3) 3: Indirect (DHW + SH) 9.C.2 [7-05]...
Page 306 12/19 Field settings table Breadcrumb Setting name Range, step Default value [0-0D] High ambient temp. for DHW WD curve. 10~25°C, step: 1°C 15°C [0-0E] Low ambient temp. for DHW WD curve. -40~5°C, step: 1°C -10°C [1-00] Low ambient temp. for LWT main zone heating WD curve. -40~5°C, step: 1°C -15°C [1-01]...
Page 307 13/19 Field settings table Breadcrumb Setting name Range, step Default value [2-00] When should the disinfection function be executed? 0: Each day 1: Monday 2: Tuesday 3: Wednesday 4: Thursday 5: Friday 6: Saturday 7: Sunday [2-01] Should the disinfection function be executed? 0: No 1: Yes [2-02]...
Page 308 14/19 Field settings table Breadcrumb Setting name Range, step Default value [4-03] Operation permission of the booster heater. 0: Restricted 1: Allowed 2: Overlap 3: Compressor off 4: Legionella only [4-04] Water pipe freeze prevention 0: Continuous pump operation 1: Non continuous pump operation 2: OFF [4-05] [4-06]...
Page 309 15/19 Field settings table Breadcrumb Setting name Range, step Default value [6-01] The temperature difference determining the heat pump OFF 0~10°C, step: 1°C temperature. 0°C [6-02] What is the capacity of the booster heater? 0~10kW, step: 0,2kW [6-03] What is the capacity of the backup heater step 1? 0~10kW, step: 0,2kW 2kW (*5) 3kW (*4, *6, *7)
Page 310 16/19 Field settings table Breadcrumb Setting name Range, step Default value [8-03] Booster heater delay timer. 20~95 min, step: 5 min 50 min [8-04] Additional running time for the maximum running time. 0~95 min, step: 5 min 95 min [8-05] Allow modulation of the LWT to control the room temp? 0: No 1: Yes...
Page 311 17/19 Field settings table Breadcrumb Setting name Range, step Default value [C-02] Is an external backup heat source connected? 0: Off 1: Direct (SH) 2: Indirect (DHW) (*3) 3: Indirect (DHW + SH) [C-03] Bivalent activation temperature. -25~25°C, step: 1°C 0°C [C-04] Bivalent hysteresis temperature.
Page 312 18/19 Field settings table Breadcrumb Setting name Range, step Default value [D-0A] [D-0B] [D-0C] [D-0D] [D-0E] [E-00] Which type of unit is installed? 0: LT split [E-01] Which type of compressor is installed? [E-02] What is the indoor unit software type? R/W (*1) 0: Reversible (*1) R/O (*2)
Page 313 19/19 Field settings table Breadcrumb Setting name Range, step Default value [F-0C] Close shut-off valve during cooling? 0: No (*10) 1: Yes (*9) [F-0D] What is the pump operation mode? 0: Continuous 1: Sample 2: Request [F-0E] Tank heating support_max 10~35 kW, step: 1kW 20 kW Bi-zone kit settings...
Page 316 4P759883-1A 2025.03...

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Daikin Altherma 3 H HT ECH2O ETSH16P30E Series Installer's Reference Manual

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