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Nibe S735 Installation Manual

Exhaust air heat pump
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Installer manual
Exhaust air heat pump
NIBE S735
1x230 V
IHB EN 2220-1
531809

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Summary of Contents for Nibe S735

  • Page 1 Installer manual Exhaust air heat pump NIBE S735 1x230 V IHB EN 2220-1 531809...
  • Page 2 Here, you can start or stop a temporary increase in the hot water Here, you can find information about product name, the product's temperature. serial number, the version of the software and service. When there is new software to download, you can do it here (provided that S735 is connected to myUplink).

  • Page 3: Table Of Contents

    Dimension and ventilation connections Dimensions and setting-out coordinates Technical specifications 5 Electrical connections Energy labelling General Electrical circuit diagram Connections Settings Item register 6 Commissioning and adjusting Preparations Filling and venting Start-up and inspection Setting the heating curve NIBE S735 Table of Contents...

  • Page 4: Important Information

    Safety information Serial number This manual describes installation and service procedures The serial number can be found at the bottom right on S735, for implementation by specialists. in the display on the home screen "Product overview" and on the type plate (PZ1).
  • Page 5 33 months from the date of manufacture, whichever is the shorter. The NIBE guarantee is based on the unit being installed and commissioned by a NIBE accredited installer, serviced every year and the Benchmark documents completed. Where this...

  • Page 6: Inspection Of The Installation

    Hot water (page 17) Mixing valve Expansion vessel Tundish Electricity (page 21) Connections Main voltage Phase voltage Fuses heat pump Fuses property Outside sensor Room sensor Safety breaker Earth circuit-breaker Miscellaneous Benchmark checklist Chapter 1 | Important information NIBE S735...

  • Page 7: Delivery And Handling

    10 mm is left to reduce the risk of noise and of any vibrations being propagated. Check that S735 has not been damaged during transport. However, the S735 can be carefully laid on its back when - 40 mm being moved into the building. The centre of gravity is in the upper part.

  • Page 8: Supplied Components

    LOCATION The kit of supplied items is placed on top of the product. Handling panels OPEN FRONT HATCH Press the hatch's top left corner to open it. Chapter 2 | Delivery and handling NIBE S735...
  • Page 9 The side panels can be removed to facilitate the installation. Remove the screws from the upper and lower edges. 3. Check the display is straight. Adjust if necessary. Twist the panel slightly outwards. NIBE S735 Chapter 2 | Delivery and handling...

  • Page 10: Removing Insulation

    The insulation can be removed to make installation easier. 4. Assembly takes place in the reverse order. Separated/one unit S735 is delivered as a unit and can be installed as one unit or separately. For separate installation, the accessory DKI S10 is required.

  • Page 11: The Heat Pump Design

    The heat pump design General XL29 QN10 QM11 XL10 QM13 QN17 QM26 QM20 QM22 NIBE S735 Chapter 3 | The heat pump design...
  • Page 12 Flow sensor (located on the rear of the product) Level monitor for the overflow cup Pressure gauge, heating system Temperature sensors, heating medium flow Temperature sensor, hot water, control Temperature sensor, hot water, control Temperature sensor, hot water, display Chapter 3 | The heat pump design NIBE S735...

  • Page 13: Distribution Boxes

    Drying filter HQ10 Expansion valve BT21 BT20 VENTILATION AA36 Exhaust air fan HQ10 Exhaust air filter AA30 1 Not visible in the image QA40 QM24 BT14 FQ14 BT17 BT12 GQ10 BT15 NIBE S735 Chapter 3 | The heat pump design...

  • Page 14: Pipe And Ventilation Connections

    In addition, the mouth of the overflow pipe (tundish), drain valves and motorised valves should also be positioned well away from all electrical components. This is the only permitted use of unpressurised Chapter 4 | Pipe and ventilation connections NIBE S735...
  • Page 15 S735 is equipped with an expansion Normally, there should not normally be any problem installing vessel (CM1). S735 in hard water areas, as the operating temperature is 50–60°C. The volume of the expansion vessel is 10 litres and it is pre-pressurised as CLEANING THE CLIMATE SYSTEM standard to 0.5 bar.

  • Page 16: Dimensions And Pipe Connections

    Dimensions and pipe SYSTEM DIAGRAM S735 consists of a heat pump, water heater, immersion connections heater, fan, circulation pump and control system.S735 is connected to the ventilation system and heating medium circuits. When the room temperature exhaust air, and in certain cases outdoor air, passes through the evaporator, the refrigerant evaporates because of its low boiling point.

  • Page 17: Symbol Key

    Hot water circulation Heat pump Climate system A climate system is a system that regulates the indoor temperature with the help of the control system in S735 and, for example, radiators, underfloor heating, fan coils, etc. CONNECTING THE CLIMATE SYSTEM Install as follows: •...

  • Page 18: Installation Alternative

    60 mm of free space to the wall. For connection, a docking kit DEW is required. DEW S42 means that S735 can be connected to the water heater VPB S200. DEW S43 means that S735 can be connected to the water heater AHPH S/AHPS S.

  • Page 19: General Ventilation Connection

    General ventilation connection VENTILATION CONNECTIONS S735 has two sizes of ventilation connection, 125 mm or 160 • Ventilation installation must be carried out in accordance with current norms and directives. On delivery, the ventilation connections have the smaller • Provision must be made for inspection and cleaning of dimension;...

  • Page 20: Adjusting Ventilation

    Incorrect adjustment of the ventilation may lead to reduced installation efficiency and thus poorer operating economy, a poorer indoor climate and moisture damage in the building. Ø160 Ø125 Chapter 4 | Pipe and ventilation connections NIBE S735...

  • Page 21: Electrical Connections

    If the supply cable is damaged, only NIBE, its ser- • If the building is equipped with an RCD, S735 must be vice representative or similar authorised person equipped with a separate one. may replace it to prevent any danger and damage.
  • Page 22 89 °C and it is reset manually. Resetting The temperature limiter (FQ10) is accessed behind the front cover. Reset the temperature limiter by pressing its button (FQ10-S2). Chapter 5 | Electrical connections NIBE S735...

  • Page 23: Connections

    If the voltage to the immersion heater and/or compressor and X6-2 (PE). is lost for a period, "Tariff blocking" must be selected at the same time via the selectable inputs, see section "Selectable inputs". NIBE S735 Chapter 5 | Electrical connections...
  • Page 24 Closed radiator thermostats can also cause problems. S735 operates without room sensor, but if you want to read Sensors the home’s indoor temperature from the display on S735, Outside sensor the room sensor must be fitted.
  • Page 25 Instructions for connecting accessories are provided in the manual accompanying the accessory. See section "Accessor- ies" for a list of the accessories that can be used with S735. Connection for communication with the most common ac- cessories is shown here.
  • Page 26 1.30.3 - "External adjustment". The output is a potential-free switching relay. • activation of one of four fan speeds. If S735 is switched off or in emergency mode, the relay is in The following options are available: C-NC position. –...
  • Page 27 The relevant distribution box must be marked with a warning about external voltage. Connecting external circulation pump An external circulation pump is connected to the AUX out- put, as illustrated below. S735 External AA2-X27 L N PE NIBE S735 Chapter 5 | Electrical connections...

  • Page 28: Settings

    10.9 low. 13.0 15.2 To activate when S735 is running: press and hold the on/off button (SF1) for 2 seconds and select "emergency mode" 1 Factory setting from the shutdown menu. In addition to this, there is the current for compressor oper-...

  • Page 29: Commissioning And Adjusting

    Turn off S735 using the on/off button (SF1). NOTE Vent the heat pump via the vent valves (QM20), (QM22), Do not start S735 if there is a risk that the water (QM24), (QM26) and the rest of the climate system via in the system has frozen.

  • Page 30: Start-Up And Inspection

    Russiky Start S735 by pressing the on/off button (SF1). Slovenšcina Follow the instructions in the display’s start guide. If the start guide does not start when you start the S735, you Suomi can start it manually in menu 7.7. Svenska Türkçe...

  • Page 31: Setting The Heating Curve

    Based on this curve, the S735 determines the temperature of the water to the Then enter menu 7.1.4.1 - "Fan speed, exhaust air" and climate system (the supply temperature) and thus the indoor reduce the fan speed "Normal"...
  • Page 32 Supply temperature Framledningstempereratur (°C) Maximum value Minimum value Outdoor temperature Utetemperatur (°C) Chapter 6 | Commissioning and adjusting NIBE S735...
  • Page 33 2 Underfloor heating may be dimensioned very differently. The above example refers to a system where the supply temperature needs to be approximately 35 – 40 °C or 45 – 50 °C on the coldest day. NIBE S735 Chapter 6 | Commissioning and adjusting...

  • Page 34: Myuplink

    Visit myuplink.com for more information. Specification You need the following in order for myUplink to be able to communicate with your S735: • wireless network or network cable • Internet connection •...

  • Page 35: Control - Introduction

    For hard switch off: press and hold the on/off button for 5 seconds. To activate emergency mode when S735 is switched off: press and hold the on/off button (SF1) for 5 seconds. (De- THE STATUS LAMP activate the emergency mode by pressing once.)

  • Page 36: Navigation

    Navigation FACTORY SETTING Factory set values are marked with *. S735 has a touchscreen where you simply navigate by pressing and dragging with your finger. SELECT Most options and functions are activated by lightly pressing on the display with your finger.
  • Page 37 Current temperature The drop-down menu shows the current status for S735, Set temperature what is in operation and what S735 is doing at the moment. Works to set temperature The functions that are in operation are highlighted with a frame.

  • Page 38: Climate Systems And Zones

    This example shows a property with two climate systems Hot water (A and B) divided into four zones (1-4). Temperature and Info demand-controlled ventilation can be controlled individually for each zone (accessory required). My system Connection Chapter 8 | Control - Introduction NIBE S735...

  • Page 39: Control - Menus

    Setting the temperature (without room heat is permitted. No energy is recovered from the sensors activated): exhaust air, when the compressor is blocked. Setting range: -10 – 10 NIBE S735 Chapter 9 | Control - Menus...
  • Page 40 When you have selected a new speed a clock starts a count down. When the time has counted down the ventilation The filter in S735 is of a type that should not be cleaned, but speed returns to the normal setting.
  • Page 41 Set the minimum temperature on the supply temperature an even indoor temperature, regardless of the outdoor to the climate system. This means that S735 never calculates temperature. It is from this heating curve that S735 determ- a temperature lower than that set here.
  • Page 42 "-2" and "change in curve" is increased until the desired room temperature is maintained. Caution Wait 24 hours before making a new setting, so that the room temperature has time to stabilise. Chapter 9 | Control - Menus NIBE S735...

  • Page 43: Menu 2 - Hot Water

    1 and 90 days. Tick/untick "Activated" to start/switch off the function. When the time has run out, S735 returns to the set demand mode. MENU 2.5 - HOT WATER CIRCULATION Select "Off" to switch off "More hot water".
  • Page 44 NOTE Hot water circulation is activated in menu 7.4 "Selectable in/outputs" or via accessory. Chapter 9 | Control - Menus NIBE S735...

  • Page 45: Menu 3 - Info

    Setting range: 1 – 5 years Here, you can see a diagram showing how much energy S735 supplies and consumes. You can select which parts of the installation will be included in the log. It is also possible to activate display of indoor and/or outdoor temperature.

  • Page 46: Menu 4 - My System

    In this operating mode the compressor is not active, only Alternative: Heating additional heat is used. The operating mode for S735 is normally set to "Auto". It is Caution also possible to select operating mode "Add. heat only". Se- If you choose mode "Add. heat only" the com- lect "Manual"...
  • Page 47 Setting range: 0 – 10 water is set to large demand mode (immersion heater per- mitted). You can select whether you want S735 to adjust the indoor climate based on the weather forecast here. NOTE You can set factor for outdoor temperature. The higher the The function must be connected to two AUX inputs value, the greater the effect from the weather forecast.
  • Page 48 MENU 4.30 - ADVANCED Menu "Advanced" is intended for advanced users. MENU 4.30.4 - FACT. SETTINGS USER All settings that are available to the user (including advanced menus) can be reset to default values here. Chapter 9 | Control - Menus NIBE S735...

  • Page 49: Menu 5 - Connection

    All settings made since opening the menu can be reset by selecting "Reset". MENU 5.4 – WIRELESS UNITS In this menu you connect wireless units, and manage set- tings for connected units. NIBE S735 Chapter 9 | Control - Menus...

  • Page 50: Menu 6 - Scheduling

    You can enter a In installations with water heaters without an im- tick if a mode is to be active during the day or overnight. mersion heater connected to S735, "hot water comfort" should not be set to "Off" when the Holi- Scheduling day setting is activated.
  • Page 51 If a room sensor is not activated, the desired offset of the heating curve is set. One step is usually enough to change the room temperature by one degree, but in some cases several steps may be required. NIBE S735 Chapter 9 | Control - Menus...

  • Page 52: Menu 7 - Installer Settings

    This menu contains advanced settings for hot water opera- Setting range: 5 – 70 °C tion. Stop temperature Demand mode, small/medium/large Setting range: 5 – 70 °C Stop temperature periodic increase Setting range: 55 – 70 °C Chapter 9 | Control - Menus NIBE S735...
  • Page 53 A large blocked frequency range can cause the Setting range: 1 - 100 % compressor to run jerkily. Hot water NOTE Auto Blocking peak output in S735 can lead to reduced Setting range: on/off savings. Manual speed MENU 7.1.4 - VENTILATION Setting range: 1 - 100 % This menu contains sub-menus, where you can make ad- vanced ventilation settings.
  • Page 54 Here you set the max electrical power for the internal electric maintain the same speed, regardless of whether the com- additional heat in S735, during normal operation and in pressor is operating or not, or alternatively run at different overcapacity mode (SG Ready).
  • Page 55 Select how you want the S735 to alert you that there is an If there is only one demand, the installation works with that alarm in the display here.
  • Page 56 MENU 7.2.1 - ADD/REMOVE ACCESSORIES Set the function for under floor drying here. Here, you tell S735 which accessories are installed. You can set up to seven time periods with different calcu- lated supply temperatures. If fewer than seven periods are to be used, set the remaining periods to 0 days.
  • Page 57 MENU 7.7 - START GUIDE When S735 is started for the first time, the start guide is automatically activated. From this menu, you can start it manually.

  • Page 58: Service

    Check the following: Caution Climate system start and stop temperature. The fan is in operation, even when S735 is turned Heating curve settings. off and the status lamp is lit with a blue light. 3. Function of the room sensor (if installed).

  • Page 59: Service Actions

    Correct any fault before continuing. There may be some hot water, risk of scalding. SAFETY VALVES S735 has three safety valves, two for the hot water and one Disconnect the overflow pipe from the safety valve (FL1) for the climate system.
  • Page 60 1.426 2.467 1.136 Here you can choose how current measurement values from 1.739 0.891 S735 should be saved onto a log file on the USB memory. 1.246 0.691 Set the desired interval between loggings. Select “Start logging". Caution 3. The relevant measurement values from S735 are now...
  • Page 61 MODBUS TCP/IP Caution S735 has built-in support for Modbus TCP/IP, which is activ- ated in menu 7.5.9 - "Modbus TCP/IP". Reset of the menu settings from the USB memory cannot be undone. TCP/IP settings are set in menu 5.2 - "Network settings".

  • Page 62: Disturbances In Comfort

    Enter menu 4.1 - "Operating mode". If "Auto" mode is function has occurred selected, select a higher value for "Stop additional heat" that S735 cannot remedy itself. On the display, you can see in menu 7.1.10.2 - "Auto mode setting". what type of alarm it is and reset it.
  • Page 63 There is no heating or hot water demand. • Too high set value on the automatic heating control. – S735 does not call on heating or hot water. – Adjust via the smart guide or home screen "Heating" • The heat pump defrosts.
  • Page 64 • Alarm tripped. – Follow the display instructions. Chapter 11 | Disturbances in comfort NIBE S735...

  • Page 65: Accessories

    The room unit is an accessory with a built-in room sensor, which Requires docking kit. allows the control and monitoring of S735 to be carried out in a different part of your home to where it is located. VPB S200 R UK VPB S300 R UK Part no.

  • Page 66: Technical Data

    Technical data Dimensions and setting-out coordinates S735 installed as one unit. Ø160 Ø125 Avoid routing pipes through the marked area Chapter 13 | Technical data NIBE S735...
  • Page 67 S735 at separated installation. Ø160 Ø125 Avoid routing pipes through the marked area NIBE S735 Chapter 13 | Technical data...

  • Page 68: Technical Specifications

    Expansion vessel, tap water, precharge pressure MPa (bar) 0.35 / (3.5) Pressure reduction valve, setting MPa (bar) 0.3 / (3.0) Volume expansion vessel (external) litre Max operating pressure of T&P-valve MPa (bar) 0.7 / (7.0) Chapter 13 | Technical data NIBE S735...
  • Page 69 Scale for efficiency class hot water: A+ to F. The value varies with the selected fan curve. For more detailed sound data, including sound to channels, visit nibe.co.uk. The value can vary with the room’s damping capacity. These values apply at a damping of 4 dB.

  • Page 70: Energy Labelling

    The reported efficiency of the package also takes the controller into account. If an external supplementary boiler or solar heating is added to the package, the overall efficiency of the package should be recalculated. Chapter 13 | Technical data NIBE S735...
  • Page 71 Daily energy consumption 6.90 Daily fuel consumption elec fuel Annual energy consumption 1,432 Annual fuel consumption Contact information NIBE Energy Systems – Box 14 – Hannabadsvägen 5 – 285 21 Markaryd – Sweden NIBE S735 Chapter 13 | Technical data...

  • Page 72: Electrical Circuit Diagram

    Electrical circuit diagram 1X230 V Chapter 13 | Technical data NIBE S735...
  • Page 73 NIBE S735 Chapter 13 | Technical data...
  • Page 74 Chapter 13 | Technical data NIBE S735...
  • Page 75 NIBE S735 Chapter 13 | Technical data...
  • Page 76 Chapter 13 | Technical data NIBE S735...
  • Page 77 NIBE S735 Chapter 13 | Technical data...
  • Page 78 Chapter 13 | Technical data NIBE S735...

  • Page 79: Item Register

    Draining the hot water heater, 59 Navigation Help menu, 36 Electrical addition - maximum output, 28 Power steps of the immersion heater, 28 Outdoor sensor, 24 Electrical circuit diagram, 72 Electrical connections, 21 Connecting accessories, 25 NIBE S735 Item register...
  • Page 80 Dimensions and setting-out coordinates, 66 Electrical circuit diagram, 72 Technical Data, 68 Technical Data, 68 Temperature sensor data, 60 The heat pump design, 11 Transport, 7 Troubleshooting, 62 USB service outlet, 60 Venting the climate system, 29 Warranty information, 4 Item register NIBE S735...
  • Page 81 EXHAUST AIR HEAT PUMP COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the heat pump and associated equipment as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights.
  • Page 82 MAINS PRESSURE HOT WATER STORAGE SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the storage system as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights.
  • Page 83 Service Record It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider Before completing the appropriate Service Interval Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.
  • Page 84 WS version: a989 (working edition) Publish date: 2022-06-14 09:43 This is a publication from NIBE Energy Systems. All product illustrations, facts and data are based on the available information at the time of the publication’s approval. NIBE Energy Systems makes reservations for any factual or printing errors in this publication.

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