Daikin VRV 5 REYA8A7Y1B Installer And User Manual
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Daikin VRV 5 REYA8A7Y1B Installer And User Manual

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Installer and user reference guide
VRV 5 heat recovery

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  • Page 1 Installer and user reference guide VRV 5 heat recovery REYA8A7Y1B REYA10A7Y1B REYA12A7Y1B REYA14A7Y1B REYA16A7Y1B REYA18A7Y1B REYA20A7Y1B REMA5A7Y1B...

  • Page 2: Table Of Contents

    Table of contents Table of contents 1 About this document Meaning of warnings and symbols..........................2 General safety precautions For the installer ................................2.1.1 General ................................2.1.2 Installation site ............................... 2.1.3 Refrigerant — in case of R410A or R32......................2.1.4 Electrical .................................
  • Page 3 Table of contents 10.2.7 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes..45 10.2.8 Symptom: Noise of air conditioners (Indoor unit)..................45 10.2.9 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) ..............45 10.2.10 Symptom: Noise of air conditioners (Outdoor unit)..................
  • Page 4 Table of contents 18.2.3 Multiple outdoor units: Knockout holes ......................92 18.2.4 To route the refrigerant piping ........................92 18.2.5 To connect the refrigerant piping to the outdoor unit ................. 93 18.2.6 To connect the multi connection piping kit ....................94 18.2.7 To connect the refrigerant branching kit.......................
  • Page 5 Table of contents 22.8 To perform a BS/indoor unit connection check ......................153 22.9 Operating the unit................................155 23 Hand-over to the user 24 Maintenance and service 24.1 Maintenance safety precautions............................ 157 24.1.1 To prevent electrical hazards ......................... 157 24.2 Checklist for yearly maintenance of the outdoor unit....................

  • Page 6: About This Document

    Preparation of the installation, reference data,… 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. Latest revisions of the supplied documentation may be available on the regional Daikin website or via your dealer.
  • Page 7 About this document WARNING Indicates a situation that could result in death or serious injury. WARNING: FLAMMABLE MATERIAL CAUTION Indicates a situation that could result in minor or moderate injury. NOTICE Indicates a situation that could result in equipment or property damage. INFORMATION Indicates useful tips or additional information.

  • Page 8: General Safety Precautions

    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. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation).

  • Page 9: Installation Site

    General safety precautions ▪ Instructions for shutting down the system in case of an emergency ▪ Name and address of fire department, police and hospital ▪ Name, address and day and night telephone numbers for obtaining service In Europe, EN378 provides the necessary guidance for this logbook. 2.1.2 Installation site ▪...
  • Page 10 General safety precautions WARNING ALWAYS recover the refrigerant. Do NOT release them directly into the environment. Use a vacuum pump to evacuate the installation. WARNING Make sure there is no oxygen in the system. Refrigerant may ONLY be charged after performing the leak test and the vacuum drying.

  • Page 11: Electrical

    General safety precautions ▪ Charge the refrigerant in liquid form. Adding it in gas form may prevent normal operation. CAUTION When the refrigerant charging procedure is done or when pausing, close the valve of the refrigerant tank immediately. If the valve is NOT closed immediately, remaining pressure might charge additional refrigerant.
  • Page 12 General safety precautions CAUTION ▪ When connecting the power supply: connect the earth cable first, before making the current-carrying connections. ▪ When disconnecting the power supply: disconnect the current-carrying cables first, before separating the earth connection. ▪ The length of the conductors between the power supply stress relief and the terminal block itself MUST be as such that the current-carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief.

  • Page 13: Specific Installer Safety Instructions

    Specific installer safety instructions 3 Specific installer safety instructions Always observe the following safety instructions and regulations. Installation site (see "17.1 Preparing the installation site" [  72]) WARNING Follow the service space dimensions in this manual for correct installation of the unit. "27.1 Service space: Outdoor unit" [  171].
  • Page 14 Specific installer safety instructions DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. Mounting the outdoor unit (see "17.3 Mounting the outdoor unit" [  78]) WARNING Fixing method of the outdoor unit MUST be in accordance with the instructions from this manual.
  • Page 15 Specific installer safety instructions WARNING Any gas or oil remaining inside the stop valve may blow off the pinched piping. Failure to observe the instructions in procedure below properly may result in property damage or personal injury, which may be serious depending on the circumstances.
  • Page 16 Specific installer safety instructions WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock. ▪...

  • Page 17: Instructions For Equipment Using R32 Refrigerant

     60]. WARNING Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation and are executed ONLY by authorised persons. CAUTION Do NOT use potential sources of ignition in searching for or detection of refrigerant leaks.
  • Page 18 Specific installer safety instructions NOTICE ▪ Take precautions to avoid excessive vibration or pulsation to refrigeration piping. ▪ Protect the protection devices, piping and fittings as much as possible against adverse environmental effects. ▪ Provide space for expansion and contraction of long runs of piping. ▪...

  • Page 19: For The User

    For the user REMA5+REYA8~20A7Y1B Installer and user reference guide VRV 5 heat recovery 4P687640-1 – 2022.07...

  • Page 20: User Safety Instructions

    User safety instructions 4 User safety instructions Always observe the following safety instructions and regulations. In this chapter General....................................Instructions for safe operation............................... 4.1 General WARNING If you are NOT sure how to operate the unit, contact your installer. WARNING This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if...

  • Page 21: Instructions For Safe Operation

    4.2 Instructions for safe operation WARNING Make sure installation, servicing, maintenance, repair and applied materials follow the instructions from Daikin (including all documents listed in “Documentation set”) and, in addition, comply with applicable legislation and are performed by qualified persons only. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is the applicable standard.
  • Page 22 User safety instructions CAUTION ▪ NEVER touch the internal parts of the controller. ▪ Do NOT remove the front panel. Some parts inside are dangerous to touch and appliance problems may happen. For checking and adjusting the internal parts, contact your dealer. CAUTION Do NOT operate the system when using a room fumigation-type insecticide.
  • Page 23 User safety instructions CAUTION: Pay attention to the fan! It is dangerous to inspect the unit while the fan is running. Make sure to turn OFF the main switch before executing any maintenance task. CAUTION After a long use, check the unit stand and fitting for damage.
  • Page 24 User safety instructions "9.5 After-sales service and After-sales service and warranty (see warranty" [  37]) WARNING ▪ Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may cause an electrical shock or fire. Contact your dealer.

  • Page 25: About The System

    About the system 5 About the system The VRV 5 uses R32 refrigerant which is rated as A2L and is mildly flammable. For compliance with the requirements for enhanced tightness refrigerating systems and IEC60335-2-40 the installer must take extra measures. For more information, "3.1 Instructions for equipment using R32 refrigerant" [  17].
  • Page 26 About the system Depending on the type of outdoor unit which is chosen, some functionality will or will not exist. It will be indicated throughout this operation manual when certain features have exclusive model rights or not. The complete system can be divided into several sub-systems. These sub-systems have 100% independence regarding the selection of cooling and heating operation, and each consists of one individual branch set of a BS unit, and all indoor units connected downstream.

  • Page 27: User Interface

    User interface 6 User interface CAUTION ▪ NEVER touch the internal parts of the controller. ▪ Do NOT remove the front panel. Some parts inside are dangerous to touch and appliance problems may happen. For checking and adjusting the internal parts, contact your dealer.

  • Page 28: Operation

    Operation 7 Operation In this chapter Before operation ..................................Operation range..................................Operating the system ................................7.3.1 About operating the system ..........................7.3.2 About cooling, heating, fan only, and automatic operation ................. 7.3.3 About the heating operation ..........................7.3.4 To operate the system ............................Using the dry program................................

  • Page 29: Operating The System

    Operation Cooling Heating Outdoor temperature –5~46°C DB –20~20°C DB –20~15.5°C WB Indoor temperature 21~32°C DB 15~27°C DB 14~25°C WB Indoor humidity ≤80% To avoid condensation and water dripping out of the unit. If the temperature or the humidity is beyond these conditions, safety devices may be put in action and the air conditioner may not operate.

  • Page 30: To Operate The System

    Operation In case of Then REYA10~28 (multi-use The indoor unit will continue heating operation at a models) reduced level during defrost operation. It will guarantee a decent comfort level indoor. REYA8~20 (single-use The indoor unit will stop fan operation, the models) refrigerant cycle will reverse and energy from inside the building will be used to defrost the outdoor unit...

  • Page 31: To Use The Dry Program

    Operation 7.4.2 To use the dry program To start 1 Press the operation mode selector button on the user interface several times and select (program dry operation). 2 Press the ON/OFF button of the user interface. Result: The operation lamp lights up and the system starts operating. 3 Press the air flow direction adjust button (only for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted).

  • Page 32: Setting The Master User Interface

    Operation ▪ The air flow flap itself adjusts its position. ▪ The air flow direction can be fixed by the user. ▪ Automatic and desired position . WARNING NEVER touch the air outlet or the horizontal blades while the swing flap is in operation.

  • Page 33: About Control Systems

    Operation 2 Press the operation mode selector button of the controller that you wish to designate as the master user interface. Result: Designation is completed. This user interface is designated as the master user interface and the display showing (change-over under centralised control) vanishes.

  • Page 34: Energy Saving And Optimum Operation

    Energy saving and optimum operation 8 Energy saving and optimum operation Observe the following precautions to ensure the system operates properly. ▪ Adjust the air outlet properly and avoid direct air flow to room inhabitants. ▪ Adjust the room temperature properly for a comfortable environment. Avoid excessive heating or cooling.

  • Page 35: Available Main Operation Methods

    Energy saving and optimum operation 8.1 Available main operation methods Basic The refrigerant temperature is fixed independent from the situation. It corresponds to the standard operation which is known and can be expected from/ under previous VRV systems. Automatic The refrigerant temperature is set depending on the outdoor ambient conditions. As such adjusting the refrigerant temperature to match the required load (which is also related to the outdoor ambient conditions).

  • Page 36: Maintenance And Service

    Maintenance and service 9 Maintenance and service In this chapter Precautions for maintenance and service..........................Maintenance after a long stop period ........................... Maintenance before a long stop period ..........................About the refrigerant ................................After-sales service and warranty............................9.5.1 Warranty period..............................9.5.2 Recommended maintenance and inspection......................

  • Page 37: About The Refrigerant

    Maintenance and service ▪ Let the indoor units run in fan only operation for about half a day in order to dry the interior of the units. Refer to "7.3.2  About cooling, heating, fan only, and automatic operation" [  29] for details on fan only operation. ▪...

  • Page 38: Recommended Maintenance And Inspection Cycles

    Maintenance and service When asking your dealer for an intervention, always state: ▪ The complete model name of the unit. ▪ The manufacturing number (stated on the nameplate of the unit). ▪ The installation date. ▪ The symptoms or malfunction, and details of the defect. WARNING ▪...

  • Page 39: Shortened Maintenance And Replacement Cycles

    Maintenance and service 9.5.4 Shortened maintenance and replacement cycles Shortening of "maintenance cycle" and "replacement cycle" needs to be considered in following situations: The unit is used in locations where: ▪ Heat and humidity fluctuate out of the ordinary. ▪ Power fluctuation is high (voltage, frequency, wave distortion, etc.) (the unit cannot be used if power fluctuation is outside the allowable range).

  • Page 40: Troubleshooting

    Troubleshooting 10 Troubleshooting If one of the following malfunctions occur, take the measures shown below and contact your dealer. WARNING Stop operation and shut OFF the power if anything unusual occurs (burning smells etc.). Leaving the unit running under such circumstances may cause breakage, electrical shock or fire.

  • Page 41: Error Codes: Overview

    Troubleshooting Malfunction Measure The system operates but ▪ Check if air inlet or outlet of outdoor or indoor cooling or heating is unit is not blocked by obstacles. Remove any insufficient. obstacles and make sure the air can flow freely. ▪...
  • Page 42 Troubleshooting Main code Contents External protection device was activated The R32 sensor in one of the indoor units has detected a refrigerant leak The R32 sensor in one of the BS unit has detected a refrigerant leak. Safety system error (leak detection) EEPROM failure (indoor) Drain system malfunction (indoor/BS unit) Fan motor malfunction (indoor)
  • Page 43 Troubleshooting Main code Contents Fan motor malfunction (outdoor) Ambient temperature sensor malfunction (outdoor) Discharge temperature sensor malfunction (outdoor) Suction temperature sensor malfunction (outdoor) De-icing temperature sensor malfunction (outdoor) or heat exchanger gas temperature sensor malfunction (outdoor) Liquid temperature sensor (after subcool HE) malfunction (outdoor) Liquid temperature sensor (coil) malfunction (outdoor) Gas temperature sensor (after subcool HE) malfunction (outdoor)

  • Page 44: Symptoms That Are Not System Malfunctions

    Troubleshooting The error code is only shown on the user interface of the indoor unit where the error occurs. 10.2 Symptoms that are NOT system malfunctions The following symptoms are NOT system malfunctions: 10.2.1 Symptom: The system does not operate ▪...

  • Page 45: Symptom: White Mist Comes Out Of A Unit (Indoor Unit, Outdoor Unit)

    Troubleshooting 10.2.6 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit) When the system is changed over to heating operation after defrost operation. Moisture generated by defrost becomes steam and is exhausted. 10.2.7 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes This is because the user interface is intercepting noise from electric appliances other than the air conditioner.

  • Page 46: Symptom: The Outdoor Unit Fan Does Not Spin

    Troubleshooting 10.2.13 Symptom: The outdoor unit fan does not spin During operation. The speed of the fan is controlled in order to optimise product operation. 10.2.14 Symptom: The display shows "88" This is the case immediately after the main power supply switch is turned on and means that the user interface is in normal condition.

  • Page 47: Relocation

    Relocation 11 Relocation Contact your dealer to remove and reinstall the entire unit. Moving units requires technical expertise. REMA5+REYA8~20A7Y1B Installer and user reference guide VRV 5 heat recovery 4P687640-1 – 2022.07...

  • Page 48: Disposal

    Disposal 12 Disposal This unit uses hydrofluorocarbon. Contact your dealer when discarding this unit. It is required by law to collect, transport and discard the refrigerant in accordance with the "hydrofluorocarbon collection and destruction" regulations. NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation.

  • Page 49: Technical Data

    Follow the steps below to consult the Energy Label – Lot 21 data of the unit and outdoor/indoor combinations. 1 Open the following webpage: https://energylabel.daikin.eu/ 2 To continue, choose: ▪ "Continue to Europe" for the international website. ▪ "Other country" for a country related site.

  • Page 50: For The Installer

    For the installer REMA5+REYA8~20A7Y1B Installer and user reference guide VRV 5 heat recovery 4P687640-1 – 2022.07...

  • Page 51: About The Box

    About the box 14 About the box Keep the following in mind: ▪ At delivery, the unit MUST be checked for damage and completeness. Any damage or missing parts MUST be reported immediately to the claims agent of the carrier. ▪...

  • Page 52: To Unpack The Outdoor Unit

    About the box 14.1 To unpack the outdoor unit Remove the packaging material from the unit: ▪ Take care not to damage the unit when removing the shrink foil with a cutter. ▪ Remove the 4 bolts fixing the unit to its pallet. WARNING Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them.

  • Page 53: Accessory Pipes: Diameters

    About the box d Installation information sticker e Fluorinated greenhouse gases label f Multilingual fluorinated greenhouse gases label g Piping accessory bag 14.3 Accessory pipes: Diameters Accessory pipes Øa [mm] Øb [mm] Gas pipe 25.4 19.1 ▪ Front connection ID Øa ID Øb 22.2 ▪...
  • Page 54 About the box 1 Remove the bolt (a) and washers. 2 Remove the transportation stay (b) as shown in the figure below. (12.3 N·m) a Bolt b Transportation stay REMA5+REYA8~20A7Y1B Installer and user reference guide VRV 5 heat recovery 4P687640-1 – 2022.07...

  • Page 55: About The Units And Options

    About the units and options 15 About the units and options In this chapter 15.1 Identification label: Outdoor unit............................15.2 About the outdoor unit ................................15.3 System layout..................................15.4 Combining units and options..............................15.4.1 About combining units and options........................15.4.2 Possible combinations of indoor units........................

  • Page 56: System Layout

    About the units and options Model Description REYA8~20 Heat recovery model for single or multi-use REMA5 Heat recovery model for multi-use only Depending on the type of outdoor unit which is chosen, some functionality will or will not exist. It will be indicated throughout this installation manual and brought to your attention.

  • Page 57: Combining Units And Options

    About the units and options 15.4 Combining units and options INFORMATION Certain options may NOT be available in your country. 15.4.1 About combining units and options NOTICE To be sure your system setup (outdoor unit+indoor unit(s)) will work, you have to consult the latest technical engineering data for VRV 5 heat recovery.

  • Page 58: Possible Options For The Outdoor Unit

    About the units and options ▪ Never combine more than two units to create a multi combination. ▪ The combinations in the table below are standard combinations. Other combinations are possible as free combination. ▪ Standard and free combinations have different piping restrictions. Continuous heating REYA10 = REMA5 + 5 REYA13 = REYA8 + REMA5...
  • Page 59 About the units and options See also: "17.1.2  Additional installation site requirements of the outdoor unit in cold climates" [  75]. Demand PCB (EKRP1AHTA) 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.

  • Page 60: Special Requirements For R32 Units

    Special requirements for R32 units 16 Special requirements for R32 units In this chapter 16.1 Installation space requirements............................. 16.2 System layout requirements ..............................16.3 About the charge limit................................16.4 To determine the charge limit..............................16.1 Installation space requirements WARNING If the appliance contains R32 refrigerant, the floor area of the room in which the appliance is stored shall be at least 956 m².
  • Page 61 Special requirements for R32 units The total amount of refrigerant in the system shall be less than or equal to the maximum allowed total refrigerant amount. The maximum allowed total refrigerant amount depends on the area of the rooms being served by the system and the rooms in the lowest underground floor.
  • Page 62 Special requirements for R32 units 1 Only a safety system compatible remote controller can be used. See technical data sheet for remote controller compatibility (e.g. BRC1H52/82*). 2 Each indoor unit has to be connected to a separate remote controller. In case indoor units are operating under group control, it is possible to only use 1 remote controller per room.
  • Page 63 Special requirements for R32 units Note: Incorrect use of remote controllers can result in occurrence of error codes, non-operating system or system that is not compliant to applicable legislation. Note: iTM in combination with a WAGO module can also be used as supervisor remote controller.

  • Page 64: About The Charge Limit

    Special requirements for R32 units c Indoor unit d Remote controller NOT compatible with R32 safety system e Remote controller compatible with R32 safety system f Remote controller in supervisor mode g Supervisor room 16.3 About the charge limit The charge limit must be determined separately for each BS unit branch pipe port. This is possible because of the shut-off valves in the BS unit.
  • Page 65 Special requirements for R32 units ≥ 20 mm ≥ 20 mm nvmin ≥ 50% A nvmin ≤ 100 mm Minimal natural ventilation area nvmin For the lower opening: It is not an opening to the outside The opening cannot be closed The opening must be ≥0.012 m²...
  • Page 66 Special requirements for R32 units Room area [m²] Maximum total indoor unit capacity class 1 indoor unit per 2~5 indoor units per branch pipe port branch pipe port 40 m after 1 90 m after 1 branch branch — — — — —...
  • Page 67 Special requirements for R32 units OTHER FLOORS Table "Maximum capacity class" LOWEST UNDERGROUND FLOOR Graph & table "Lowest underground floor" AND table "Maximum capacity class" Lowest underground floor 63.8 m (kg) 10.1 13.5 16.8 20.2 23.6 27.0 30.3 33.7 37.1 40.5 43.9 47.2...
  • Page 68 Special requirements for R32 units installed in the lowest underground floor, the total charge of the system MUST be less than the limit that is derived from the graph. If NOT, change the installation and repeat all of the above steps. Possible changes: Increase the area of smallest room connected to the same branch pipe port.
  • Page 69 Special requirements for R32 units Example 2 VRV system serving three rooms via one BS unit. Room  1 (40  m², one level underground) is served by one indoor unit (32 class) connected to port A. Room 2 (60  m², ground level) is served by two indoor units (1×20 and 1× 40  class) also connected to port A (no extention and liquid pipe size up has been done).
  • Page 70 Special requirements for R32 units Flow chart (for EACH BS unit branch pipe port) Procedure to check if smallest room size meets requirements Determine smallest room area served by same branch pipe port. See step 1 in above text. [m²] Derive maximum indoor capacity to connect to branch pipe port.
  • Page 71 Special requirements for R32 units Continued from previous column/page Procedure to check if smallest area of lowest underground floor meets the requirements Determine smallest room area of the lowest underground floor. [m²] Derive maximum system charge. See step 3 in above text. Total charge limit [kg] Derive total charge amount.

  • Page 72: Unit Installation

    Unit installation 17 Unit installation WARNING The installation MUST comply with the requirements that apply to this R32 equipment. For more information, see "16 Special requirements for R32 units" [  60]. In this chapter 17.1 Preparing the installation site ..............................17.1.1 Installation site requirements of the outdoor unit ....................17.1.2 Additional installation site requirements of the outdoor unit in cold climates ...........
  • Page 73 Unit installation The outdoor unit is designed for outdoor installation only, and for the following ambient temperatures: Cooling Heating Outdoor temperature –5~46°C DB –20~20°C DB –20~15.5°C WB Indoor temperature 21~32°C DB 15~27°C DB 14~25°C WB Indoor humidity ≤80% To avoid condensation and water dripping out of the unit. If the temperature or the humidity is beyond these conditions, safety devices may be put in action and the air conditioner may not operate.
  • Page 74 Unit installation ▪ Make sure the installation site withstands the weight and vibration of the unit. ▪ Make sure the area is well ventilated. Do NOT block any ventilation openings. ▪ Make sure the unit is level. ▪ Select a place where rain can be avoided as much as possible. ▪...

  • Page 75: Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates

    Unit installation If the outdoor unit is exposed to direct sea winds, install a windbreaker. ▪ Height of windbreaker≥1.5×height of outdoor unit ▪ Mind the service space requirements when installing the windbreaker. a Sea wind b Building c Outdoor unit d Windbreaker 17.1.2 Additional installation site requirements of the outdoor unit in cold climates NOTICE...

  • Page 76: Opening The Unit

    Ambient outdoor temperature If the unit has to operate for 5 days in this area with high humidity (>90%), Daikin recommends to install the optional heater tape kit (EKBPH012TA or EKBPH020TA) to keep the drain holes free. 17.2 Opening the unit 17.2.1 About opening the units...

  • Page 77: To Open The Outdoor Unit

    Unit installation 17.2.2 To open the outdoor unit DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING 5~12 HP 14~20 HP 14× 14× Once the front plates open, the electrical component box can be accessed. See "17.2.3 To open the electrical component box of the outdoor unit" [  77].

  • Page 78: Mounting The Outdoor Unit

    Unit installation a Electrical component box cover b Front side c Power supply terminal block d Sealing material e Moisture and dirt could enter NOT allowed Allowed 17.3 Mounting the outdoor unit 17.3.1 To provide the installation structure Make sure the unit is installed level on a sufficiently strong base to prevent vibration and noise.

  • Page 79: To Install The Outdoor Unit

    Unit installation ▪ Fasten the unit in place using four foundation bolts M12. It is best to screw in the foundation bolts until their length remains 20 mm above the foundation surface. NOTICE ▪ Prepare a water drainage channel around the foundation to drain waste water from around the unit.

  • Page 80: Piping Installation

    Piping installation 18 Piping installation CAUTION "3  Specific installer safety instructions"  [   13] to make sure this installation complies with all safety regulations. In this chapter 18.1 Preparing refrigerant piping ..............................18.1.1 Refrigerant piping requirements ........................... 18.1.2 Refrigerant piping material ............................ 18.1.3 Refrigerant piping insulation..........................

  • Page 81: Refrigerant Piping Insulation

    Piping installation ▪ Flare connections: Only use annealed material. ▪ Piping temper grade and thickness: Outer diameter (Ø) Temper grade Thickness (t) Ø 6.4 mm (1/4") Annealed (O) ≥0.80 mm 9.5 mm (3/8") 12.7 mm (1/2") 15.9 mm (5/8") Annealed (O) ≥0.99 mm 19.1 mm (3/4") Half hard (1/2H) ≥0.80 mm 22.2 mm (7/8") 28.6 mm (1 1/8")
  • Page 82 Piping installation A, B: Piping between outdoor unit and (first) refrigerant branch kit Choose from the following table in accordance with the outdoor unit total capacity type. Pipe A is in case of multi-connection the sum of the outdoor units connected upstream.

  • Page 83: To Select Refrigerant Branch Kits

    Piping installation b Main pipes (increase size) c First refrigerant branch kit d Last refrigerant branch kit e Indoor unit f BS unit g Piping between first and last refrigerant branch kit (increase size) h Piping between last refrigerant branch kit and indoor unit Size up HP class Liquid piping outer diameter [mm]...

  • Page 84: Installation Limitations

    Piping installation Indoor unit capacity index Refrigerant branch kit 290≤x<640 KHRQ23M64H ≥640 KHRQ23M75H ▪ For refnet joints between BS unit and indoor units Indoor unit capacity index Refrigerant branch kit ≤250 KHRQ22M20TA INFORMATION Maximum 8 branches can be connected to a header. ▪...

  • Page 85: About The Piping Length

    Piping installation Description Model BS4A BS6A BS8A BS10A BS12A Maximum number of connectable indoor units per BS unit (a) Maximum number of connectable indoor units per BS unit branch (b) Maximum capacity index of connectable indoor units per BS unit Maximum capacity index of connectable indoor units per branch Maximum capacity index of...
  • Page 86 Piping installation Total downstream Equivalent length of BS unit [m] indoor unit capacity BS4A BS6A BS8A BS10A BS12A <150 150≤x<290 290≤x<450 450≤x<620 620≤x<690 690≤x≤750 Example: BS1 BS unit 1 (BS4A) BS2 BS unit 2 (BS4A) a 20 m b 10 m c 15 m d 10 m The equivalent length for an indoor unit connected to BS1 is the sum of: a=20 m, b=10 m,...

  • Page 87: Single Outdoor Units And Standard Multi-Outdoor-Unit Combinations >20 Hp

    Piping installation Term Definition Height difference [m] Height difference between outdoor units The allowable height difference is 50 m in case the outdoor unit is positioned higher than the indoor unit, and 40 m in case the outdoor unit is positioned lower than the indoor unit. If only VRV DX indoor units are used, the allowable height difference between outdoor and indoor units may be extended to 90 m, without the need of an additional option kit.

  • Page 88: Standard Multi-Outdoor-Unit Combinations ≤20 Hp And Free Multi-Outdoor-Unit Combinations

    Piping installation Pipe Maximum length (actual/equivalent) Longest pipe after the first branch or 40 m/— multi BS unit (B1+C1, B2+C2, B1+C3, B1+D+C4) In case of a multi-outdoor setup: 10 m/13 m longest pipe from the outdoor unit to the last multi-outdoor piping branch (E) Total pipe length 1000 m/—...

  • Page 89: Multiple Outdoor Units: Possible Layouts

    Piping installation Pipe Maximum length (actual/equivalent) Longest pipe from the outdoor unit or 135 m/160 m the last multi-outdoor piping branch (A +B1+C1, A+B2+C2, A+B1+C3, A+B1+D +C4) Longest pipe after the first branch or 40 m/— multi BS unit (B1+C1, B2+C2, B1+C3, B1+D+C4) In case of a multi-outdoor setup: 10 m/13 m longest pipe from the outdoor unit to...
  • Page 90 Piping installation a To indoor unit b Oil collects to the outmost outdoor unit when the system stops NOT allowed (oil remains in piping) Allowed ▪ If the piping length between the outdoor units exceeds 2  m, create a rise of 200 mm or more in the suction gas line and the high pressure/low pressure gas line within a length of 2 m from the kit.

  • Page 91: Connecting The Refrigerant Piping

    Piping installation NOTICE There are restrictions on the refrigerant pipe connection order between outdoor units during installation in case of a multiple outdoor unit system. Install according to following restrictions. The capacities of outdoor units A and B must fulfill the following restriction conditions: A≥B.

  • Page 92: Multiple Outdoor Units: Knockout Holes

    Piping installation NOTICE Take the following precautions on refrigerant piping into account: ▪ Avoid anything but the designated refrigerant to get mixed into the refrigerant cycle (e.g. air). ▪ Only use R32 when adding refrigerant. ▪ Only use installation tools (e.g. manifold gauge set) that are exclusively used for R32 installations to withstand the pressure and to prevent foreign materials (e.g.

  • Page 93: To Connect The Refrigerant Piping To The Outdoor Unit

    Piping installation a Left-side connection b Front connection c Right-side connection Note: For side connections, remove the knockout hole on the bottom plate as shown below: a Large knockout hole b Drill c Points for drilling NOTICE Precautions when making knockout holes: ▪...

  • Page 94: To Connect The Multi Connection Piping Kit

    Piping installation NOTICE ▪ Be sure to use the supplied accessory pipes when carrying out piping work in the field. ▪ Be sure that the field installed piping does not touch other pipes, the bottom panel or side panel. Especially for the bottom and side connection, be sure to protect the piping with suitable insulation, to prevent it from coming into contact with the casing.

  • Page 95: To Protect Against Contamination

    Piping installation a Horizontal surface b Refnet joint mounted vertically c Refnet joint mounted horizontally d Header 18.2.8 To protect against contamination Protect the piping as described in the following table to prevent dirt, liquid or dust from entering the piping. Unit Installation period Protection method...

  • Page 96: To Braze The Pipe End

    Piping installation 18.2.9 To braze the pipe end NOTICE Precautions when connecting field piping. Add brazing material as shown in the figure. ≤Ø25.4 >Ø25.4 ▪ When brazing, blow through with nitrogen to prevent creation of large quantities of oxidised film on the inside of the piping. This film adversely affects valves and compressors in the refrigerating system and prevents proper operation.
  • Page 97 Piping installation a Service port and service port cover b Stop valve c Field piping connection d Dust cap a Service port b Dust cap c Hexagon hole d Shaft e Seal ▪ Do NOT apply excessive force to the stop valve. Doing so may break the valve body.

  • Page 98: To Remove The Pinched Pipes

    Piping installation Tightening torques Stop valve size Tightening torque [N•m] [mm] Valve body Hexagonal wrench Service port Ø9.5 4 mm 10.7~14.7 Ø12.7 8~10 Ø15.9 14~16 6 mm Ø19.1 19~21 8 mm Ø25.4 When opening or closing. 18.2.11 To remove the pinched pipes WARNING Any gas or oil remaining inside the stop valve may blow off the pinched piping.

  • Page 99: Checking The Refrigerant Piping

    Piping installation WARNING NEVER remove the pinched piping by brazing. Any gas or oil remaining inside the stop valve may blow off the pinched piping. 6 Wait until all oil has dripped out before continuing with the connection of the field piping in case the recovery was not complete.

  • Page 100: Checking Refrigerant Piping: General Guidelines

    Piping installation Method 2: After power ON If the system has already been powered on, activate setting [2‑21] (refer to "21.1.4  To access mode 1 or 2"  [   130]). This setting will open field expansion valves to guarantee a refrigerant piping pathway and make it possible to perform the leak test and the vacuum drying.

  • Page 101: Checking Refrigerant Piping: Setup

    Piping installation NOTICE Do NOT purge the air with refrigerants. Use a vacuum pump to evacuate the installation. 18.3.3 Checking refrigerant piping: Setup p < p > a Pressure reducing valve b Nitrogen c Weighing scales d Refrigerant R32 tank (siphon system) e Vacuum pump f Liquid line stop valve g Gas line stop valve...

  • Page 102: To Perform Vacuum Drying

    Piping installation 3 Should the pressure rise, the system may either contain moisture (see vacuum drying below) or have leaks. To check for leaks: Pressure leak test 1 Break the vacuum by pressurising with nitrogen gas to a minimum gauge pressure of 0.2 ...

  • Page 103: To Insulate The Refrigerant Piping

    Piping installation 18.3.6 To insulate the refrigerant piping After finishing the leak test and vacuum drying, the piping must be insulated. Take into account the following points: ▪ Make sure to insulate the connection piping and refrigerant branch kits entirely. ▪...
  • Page 104 Piping installation 4 Wind heat insulation around the curves, and then cover it with vinyl tape (c, see above). 5 Make sure the field piping does not touch any compressor components. 6 Seal the insulation ends (sealant etc.) (b, see above). 7 Wrap the field piping with vinyl tape (d, see above) to protect it against sharp edges 8 If the outdoor unit is installed above the indoor unit, cover the stop valves...

  • Page 105: Charging Refrigerant

    Charging refrigerant 19 Charging refrigerant In this chapter 19.1 Precautions when charging refrigerant ..........................105 19.2 About charging refrigerant..............................106 19.3 About the refrigerant ................................107 19.4 To determine the additional refrigerant amount ........................107 19.5 To charge refrigerant: Flow chart ............................110 19.6 To charge refrigerant................................

  • Page 106: About Charging Refrigerant

    Charging refrigerant NOTICE Before starting charging procedures, check if the 7‑segment display indication of the outdoor unit A1P PCB is as normal (see "21.1.4 To access mode 1 or 2" [  130]). If a malfunction code is present, see "25.3  Solving problems based on error codes" [  160].

  • Page 107: About The Refrigerant

    Charging refrigerant 19.3 About the refrigerant CAUTION "3 Specific installer safety instructions" [  13] to acknowledge all related safety instructions. This product contains fluorinated greenhouse gases. Do NOT vent gases into the atmosphere. Refrigerant type: R32 Global warming potential (GWP) value: 675 Periodical inspections for refrigerant leaks may be required depending on the applicable legislation.
  • Page 108 Charging refrigerant NOTICE The total refrigerant charge amount in the system MUST always be lower than 15.96 [kg]× the number of indoor units connected downstream of BS units, with a maximum of 63.8 kg. Formula: R=[(X ×Ø19.1)×0.23+(X ×Ø15.9)×0.16+(X ×Ø12.7)×0.10+(X ×Ø9.5)×0.053+(X ×Ø6.4 )×0.020]×1.04+(A+B+C) R Additional refrigerant to be charged [kg] (rounded off to one decimal place) Total length [m] of liquid piping size at Øa...
  • Page 109 Charging refrigerant Inch piping Metric piping Piping Weight factor Piping Weight factor Ø19.1 mm 0.23 Ø19 mm 0.22 Connection ratio requirements. When selecting indoor units, the connection ratio must comply with the following requirements. For more information, see the technical engineering data. Other combinations than those mentioned in the table are not allowed.

  • Page 110: To Charge Refrigerant: Flow Chart

    Charging refrigerant 19.5 To charge refrigerant: Flow chart For more information, see "19.6 To charge refrigerant" [  110]. Step 1 p < p > Calculate additional refrigerant charge amount: R (kg) Step 2+3 • Close valve A • Open valve B to the liquid line •...
  • Page 111 Charging refrigerant Pre-charging refrigerant 1 Calculate the additional amount of refrigerant to be added using the formula mentioned in "19.4 To determine the additional refrigerant amount" [  107]. Note: The first 10 kg of additional refrigerant can be pre-charged without outdoor unit operation. Note: Pre-charging can be done without compressor operation Prerequisite: Make sure that all outdoor unit stop valves and manifold valve A are closed.
  • Page 112 Charging refrigerant b Refrigerant R32 tank (siphon system) c Vacuum pump d Refrigerant charge port A Valve A INFORMATION For a multi outdoor unit system, it is not required to connect all charge ports to a refrigerant tank. The refrigerant will be charged with ±1 kg per minute. If you need to speed up in case of a multiple outdoor system, connect the refrigerant tanks to each outdoor unit.

  • Page 113: Error Codes When Charging Refrigerant

    Charging refrigerant 19.7 Error codes when charging refrigerant If a malfunction occurs, close valve A immediately. Confirm the malfunction code and take corresponding action, "25.3  Solving problems based on error codes" [  160]. 19.8 Checks after charging refrigerant ▪ Are all stop valves open? ▪...
  • Page 114 Charging refrigerant No leak shall be detected with a test method that has a sensitivity of 5  grams refrigerant per year or better, at a pressure of at least 0.25  times the maximum working pressure (see "PS High" on the unit name plate). In case a leak is detected, recover the refrigerant and repair the joint(s).

  • Page 115: Electrical Installation

    Electrical installation 20 Electrical installation CAUTION "3  Specific installer safety instructions"  [   13] to make sure this installation complies with all safety regulations. In this chapter 20.1 About connecting the electrical wiring ..........................115 20.1.1 Precautions when connecting the electrical wiring ....................115 20.1.2 About the electrical wiring.............................
  • Page 116 Electrical installation INFORMATION Also read the precautions and requirements in the "2  General safety precautions" [  8]. WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth.

  • Page 117: About The Electrical Wiring

    Electrical installation NOTICE ▪ The reversed phase protection detector of this product only functions when the product starts up. Consequently reversed phase detection is not performed during normal operation of the product. ▪ The reversed phase protection detector is designed to stop the product in the event of an abnormality when the product is started up.

  • Page 118: Guidelines When Knocking Out Knockout Holes

    Electrical installation a Outdoor unit b Indoor unit + BS unit c Main line d Branch line 1 e Branch line 2 f Branch line 3 g No branch is allowed after branch h Central user interface (etc...) A Outdoor/indoor transmission wiring B Master/slave transmission wiring NOTICE Sheathed and shielded cables are required for transmission wiring between outdoor...

  • Page 119: About Electrical Compliance

    Electrical installation NOTICE Precautions when making knockout holes: ▪ Avoid damaging the casing and underlying piping. ▪ After making the knockout holes, we recommend to remove the burrs and paint the edges and areas around the edges using repair paint to prevent rusting. ▪...

  • Page 120: Safety Device Requirements

    Electrical installation Single outdoor unit Model [Ω] Minimum S value [kVA] REYA18 — 6062 REYA20 — 7274 Multiple outdoor units Model [Ω] Minimum S value [kVA] REYA10 — 5196 REYA13 — 5387 REYA16 — 5577 REYA18 — 6599 REYA20 — 6945 REYA22 —...

  • Page 121: To Route And Fix The Transmission Wiring

    Electrical installation Multi outdoor units Model Minimum circuit ampacity Recommended fuses REYA10 30.0 A 40 A REYA13 31.1 A 40 A REYA16 32.2 A 40 A REYA18 38.1 A 50 A REYA20 40.1 A 50 A REYA22 46.0 A 63 A REYA24 47.1 A 63 A REYA26 51.0 A 63 A REYA28 55.0 A 63 A For all models: ▪...
  • Page 122 Electrical installation 5~12 HP 14~20 HP a Transmission wiring (possibility 1) b Transmission wiring (possibility 2) c Tie wrap. Fix to factory-mounted low voltage wiring. Knockout hole has to be removed. Close the hole to avoid small animals or dirt from entering.

  • Page 123: To Connect The Transmission Wiring

    Electrical installation 20.3 To connect the transmission wiring The wiring from the indoor units must be connected to the F1/F2 (In‑Out) terminals on the PCB in the outdoor unit. Tightening torque for the transmission wiring terminal screws: Screw size Tightening torque [N•m] M3.5 (A1P) 0.8~0.96 MULTI...

  • Page 124: To Route And Fix The Power Supply

    Electrical installation f Insulation 20.5 To route and fix the power supply NOTICE When routing earth wires, secure clearance of 25  mm or more away from compressor lead wires. Failure to observe this instruction properly may adversely affect correct operation of other units connected to the same earth. The power supply wiring can be routed from the front and left side.
  • Page 125 Electrical installation CAUTION ▪ When connecting the power supply: connect the earth cable first, before making the current-carrying connections. ▪ When disconnecting the power supply: disconnect the current-carrying cables first, before separating the earth connection. ▪ The length of the conductors between the power supply stress relief and the terminal block itself MUST be as such that the current-carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief.

  • Page 126: To Connect The External Outputs

    Electrical installation 20.7 To connect the external outputs SVS and SVEO output The SVS and SVEO outputs are contacts on terminal X2M. The SVS output is a contact on terminal X2M that closes in case a leak is detected, failure or disconnection of the R32 sensor (located in the BS unit or indoor unit). The SVEO output is a contact on terminal X2M that closes in case of occurrence of general errors.

  • Page 127: To Check The Insulation Resistance Of The Compressor

    Electrical installation 5~12 HP 14~20 HP a Output cable (SVEO or SVS)(field supply) b Tie-wrap (accessory) Alternate routing INFORMATION Sound data about the refrigerant leakage alarm are available in the technical data sheet of the user interface. E.g. the BRC1H52* controller generates an alarm of 65 dB (sound pressure, measured at 1 m distance from the alarm).

  • Page 128: Configuration

    Configuration 21 Configuration DANGER: RISK OF ELECTROCUTION INFORMATION It is important that all information in this chapter is read sequentially by the installer and that the system is configured as applicable. In this chapter 21.1 Making field settings................................128 21.1.1 About making field settings ...........................

  • Page 129: Field Setting Components

    Configuration Mode 1 and 2 Mode Description Mode 1 Mode 1 can be used to monitor the current situation of the outdoor unit. Some field setting contents can be (monitoring settings) monitored as well. Mode 2 Mode 2 is used to change the field settings of the system.

  • Page 130: To Access Mode 1 Or 2

    Configuration 2× a Front plate b Main PCB with three 7‑segment displays and three push buttons c Electrical component box service cover Operate the switches and push buttons with an insulated stick (such as a closed ball-point pen) to avoid touching of live parts. Make sure to re-attach the inspection cover into the electronic component box cover and to close the front plate's inspection cover after the job is finished.

  • Page 131: To Use Mode 1

    Configuration In case of malfunction, the malfunction code is displayed on the indoor unit user interface and the outdoor unit 7‑segment display. Solve the malfunction code accordingly. The communication wiring should be checked at first. Access BS1 is used to switch between the default situation, mode 1 and mode 2. Access Action Default situation...

  • Page 132: To Use Mode 2

    Configuration 3 Push BS2 10 times. Result: Mode 1 setting 10 is addressed: 4 Push BS3 one time; the value which is returned (depending on the actual field situation), is the amount of indoor units which are connected to the system. Result: Mode ...

  • Page 133: Mode 1: Monitoring Settings

    Configuration 4 Push BS3 one time. The display shows the status of the setting (depending on the actual field situation). In the case of [2‑18], the default value is "0", which means the ventilated enclosure function is deactivated. Result: Mode  2 setting  18 is addressed and selected, return value is the current setting situation.
  • Page 134 Configuration [1‑2] Description Unit is currently operating under power consumption limitation. Power consumption limitation can be set in mode  2. There are two methods to activate power consumption limitation of the outdoor unit system. ▪ The first method is to enable a forced power consumption limitation by field setting.

  • Page 135: Mode 2: Field Settings

    Configuration Result Description No data Leak detection failure due to abnormal operation No leak detected Leak detected For instructions on how to use the leak detection function, see "21.3 Using the leak detection function" [  147]. [1‑34] Shows the remaining days until the next automatic leak detection (if automatic leak detection function is activated).
  • Page 136 Configuration [2‑9] target [°C] For more information and advice about the impact of these settings, see "21.2 Energy saving and optimum operation" [  142]. [2‑12] Enable the low noise function and/or power consumption limitation via external control adaptor (DTA104A61/62). If the system needs to be running under low noise operation or under power consumption limitation conditions when an external signal is sent to the unit, this setting should be changed.
  • Page 137 Configuration ▪ For details concerning the charging procedure, see "19.2  About charging refrigerant" [  106]. ▪ For details concerning the calculation of additional refrigerant charge amount, "19.4 To determine the additional refrigerant amount" [  107]. ▪ For guidance concerning the input of the additional refrigerant charge amount and leak detection function see "21.3 Using the leak detection function" [...
  • Page 138 Configuration [2‑22] Automatic low noise setting and level during night time. By changing this setting, you activate the automatic low noise operation function of the unit and define the level of operation. Depending on the chosen level, the noise level will be lowered. The start and stop moments for this function are defined under setting [2‑26] and [2‑27] (see descriptions below).
  • Page 139 Configuration [2‑27] Stop time automatic low noise operation (approximately) 3 (default) 8h00 [2‑30] Power consumption limitation level (step  1) via the external control adaptor (DTA104A61/62). If the system needs to be running under power consumption limitation conditions when an external signal is sent to the unit, this setting defines the level power consumption limitation that will be applied for step 1.
  • Page 140 Configuration [2‑35] Description In case the outdoor unit is installed in the lowest position (indoor units are installed on a higher position than outdoor units) and the height difference between the highest indoor unit and the outdoor unit exceeds 40 m, the setting [2‑35] should be changed to 0. 1 (default) —...
  • Page 141 Configuration [2‑60] Supervisor remote controller setting. A power reset is required to save this setting. For details about the supervisor remote controller, see "16.2  System layout requirements"  [   60] or refer to the remote controller installation and user reference guide. [2‑60] Description 0 (default)

  • Page 142: Energy Saving And Optimum Operation

    Configuration For more information and advice about the impact of these settings, see "21.2 Energy saving and optimum operation" [  142]. [2‑88] Automatic leak detection activation. When you want to use the automatic leak detection function you have to activate this setting. By activating setting [2‑88], the automatic leak detection will be executed depending on the defined value setting.

  • Page 143: Available Comfort Settings

    Configuration E.g., when your system is operating in cooling, you do not need as much cooling under low outdoor ambient temperatures (e.g., 25°C) as under high outdoor ambient temperatures (e.g., 35°C). Using this idea, the system automatically starts increasing its refrigerant temperature, automatically reducing the delivered capacity and increasing the system's efficiency.
  • Page 144 Configuration Powerful Overshoot (during heating operation) or undershoot (during cooling operation) is allowed compared to the requested refrigerant temperature, in order to achieve the required room temperature very fast. The overshoot is allowed from the start up moment. ▪ In case of cooling operation the evaporating temperature is allowed to go down to 3°C on temporary base depending on the situation.

  • Page 145: Example: Automatic Mode During Cooling

    Configuration ▪ In case of heating operation the condense temperature is allowed to go up to 46°C on temporary base depending on the situation. ▪ When the request from the indoor units becomes more moderate, the system will eventually go to the steady state condition which is defined by the operation method above.

  • Page 146: Example: Automatic Mode During Heating

    Configuration B Virtual load curve (initial capacity automatic mode) C Virtual target value (initial evaporation temperature value automatic mode) D Required evaporation temperature value E Load factor F Outside air temperature Evaporating temperature Quick Powerful Mild Room temperature evolution: A Indoor unit set temperature B Operation start C Operating time D Mild...

  • Page 147: Using The Leak Detection Function

    Configuration E Load factor F Outside air temperature Condensing temperature Quick Powerful Mild Room temperature evolution: A Indoor unit set temperature B Operation start C Operating time D Mild E Quick F Powerful 21.3 Using the leak detection function 21.3.1 About automatic leak detection The (automatic) leak detection function is not by default activated and can only start working when the additional refrigerant charge is inputted into the system's logic (see [2‑14]).

  • Page 148: To Manually Perform A Leak Detection

    Configuration 21.3.2 To manually perform a leak detection When the leak detection function was initially not required, but its activation is wanted at a later moment, input the additional refrigerant charge into the system's logic. Executing the leak detection function one time at site can also be done by following procedure.

  • Page 149: 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 150: Checklist Before Commissioning

    Commissioning CAUTION Do NOT perform the test operation while working on the indoor units. When performing the test operation, NOT ONLY the outdoor unit, but the connected indoor unit will operate as well. Working on an indoor unit while performing a test operation is dangerous.

  • Page 151: Checklist During Commissioning

    Commissioning Insulation test of the main power circuit Using a megatester for 500  V, check that the insulation resistance of 2  MΩ or more is attained by applying a voltage of 500 V DC between power terminals and earth. NEVER use the megatester for the transmission wiring. Fuses, circuit breakers, or protection devices Check that the fuses, circuit breakers, or the locally installed protection devices are of the size and type specified in the chapter...

  • Page 152: About The Test Run

    Commissioning 22.5 About the test run NOTICE Make sure to carry out the test run after the first installation. Otherwise, the malfunction code will be displayed on the user interface and normal operation or individual indoor unit test run cannot be carried out. The procedure below describes the test operation of the complete system.

  • Page 153: Correcting After Abnormal Completion Of The Test Run

    Commissioning Step Description Communication check Stop valve check Pipe length check Refrigerant amount check Pump down operation Unit stop INFORMATION During the test operation, it is not possible to stop the unit operation from a user interface. To abort the operation, press BS3. The unit will stop after ±30 seconds. 5 Check the test operation results on the outdoor unit 7‑segment display.
  • Page 154 Commissioning 3 To start the BS/indoor unit connection check, make field setting [2-20]=2 (see "21.1.8 Mode 2: field settings" [  135]). The unit will start the check operation. Result: The check operation is automatically carried out, the outdoor unit display will indicate " "...

  • Page 155: Operating The Unit

    Commissioning 22.9 Operating the unit Once the unit is installed and test operation of outdoor unit and indoor units is finished, the operation of the system can start. For operating the indoor unit, the user interface of the indoor unit should be switched ON.

  • Page 156: Hand-Over To The User

    Hand-over to the user 23 Hand-over to the user Once the test run is finished and the unit operates properly, make sure the following is clear for the user: ▪ Make sure that the user has the printed documentation and ask him/her to keep it for future reference.

  • Page 157: Maintenance And Service

    Maintenance and service 24 Maintenance and service NOTICE Maintenance MUST be done by an authorised installer or service agent. We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals. NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO equivalent.

  • Page 158: Checklist For Yearly Maintenance Of The Outdoor Unit

    Maintenance and service measured is still higher than 50  V  DC, discharge the capacitors in a safe manner by using a dedicated capacitor discharge pen to avoid possibility of sparking. 5~12 HP 14~20 HP 3 Pull out junction connectors X1A, X2A for the fan motors in the outdoor unit before starting service operation on the inverter equipment.

  • Page 159: To Recover Refrigerant

    Maintenance and service 3 Press BS3 to stop vacuuming mode. 24.3.2 To recover refrigerant This should be done with a refrigerant recovery unit. Follow the same procedure as for vacuuming method. DANGER: RISK OF EXPLOSION Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leak in the refrigerant circuit: ▪...

  • Page 160: Troubleshooting

    Troubleshooting 25 Troubleshooting CAUTION "3  Specific installer safety instructions"  [   13] to make sure troubleshooting complies with all safety regulations. In this chapter 25.1 Overview: Troubleshooting ..............................160 25.2 Precautions when troubleshooting............................160 25.3 Solving problems based on error codes..........................160 25.3.1 Error codes: Overview............................

  • Page 161: Error Codes: Overview

    Troubleshooting After correcting the abnormality, press BS3 to reset the malfunction code and retry operation. The malfunction code which is displayed on the outdoor unit will indicate a main malfunction code and a sub code. The sub code indicates more detailed information about the malfunction code.
  • Page 162 Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 R32 sensor malfunction in one of Check connection on PCB or the indoor units actuator. The system will continue operation, but indoor unit in scope will stop operating. Refer to the service manual for more information.
  • Page 163 Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 Electronic expansion valve Check connection on PCB or malfunction (upper heat actuator. exchanger) (Y1E) – main PCB (X21A) Electronic expansion valve Check connection on PCB or malfunction (inverter cooling) actuator. (Y5E) –...
  • Page 164 Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 Discharge temperature sensor Check connection on PCB or malfunction (R21T): open circuit – actuator. main PCB (X33A) Discharge temperature sensor Check connection on PCB or malfunction (R21T): short circuit - actuator.
  • Page 165 Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 High pressure sensor malfunction Check connection on PCB or (S1NPH): open circuit - main PCB actuator. (X32A) High pressure sensor malfunction Check connection on PCB or (S1NPH): short circuit - main PCB actuator.
  • Page 166 Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 Malfunction code: system test run Execute system test run. not yet executed (system operation not possible) An error occurred during the test Re-execute the test run. Test run aborted Re-execute the test run. Test run aborted due to Check the communication wires communication issues...

  • Page 167: Refrigerant Leak Detection System

    Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 Auto address malfunction Check if transmission wired unit (inconsistency) amount matches with powered unit amount (by monitor mode) or wait till initialisation is finished. Maintenance warning (ventilation BS unit ventilation needs fan) maintenance check.
  • Page 168 Troubleshooting f Remote controller in alarm only mode g Remote controller in supervisor mode (mandatory in some situations) h iTM (optional) Note: During start-up of the system, the mode of the remote control can be verified from the screen. Leak detection operation If the R32 sensor in the indoor unit detects a refrigerant leak: The user will be warned by both audible and visible signals of the remote controller of the leaking indoor unit (and the supervisor remote controller, if...
  • Page 169 Troubleshooting Note: It is possible to stop the leak detection alarm from the remote controller and from the app. To stop the alarm from the remote controller, press 3 seconds. Note: Leak detection will trigger SVS output. For more information, see "20.7 ...

  • Page 170: Disposal

    Disposal 26 Disposal NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. REMA5+REYA8~20A7Y1B Installer and user reference guide VRV 5 heat recovery...

  • Page 171: Technical Data

    Technical data 27 Technical data ▪ A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of latest technical data is available on the Daikin Business Portal (authentication required). In this chapter 27.1...
  • Page 172 Technical data Layout A+B+C+D Possibility 1 Possibility 2 a≥10 mm a≥50 mm — b≥300 mm b≥100 mm c≥10 mm c≥50 mm d≥500 mm d≥500 mm e≥20 mm e≥100 mm f≥600 mm f≥500 mm a≥10 mm a≥50 mm b≥300 mm b≥100 mm c≥10 mm c≥50 mm d≥500 mm d≥500 mm e≥20 mm e≥100 mm a≥10 mm a≥50 mm — b≥500 mm b≥500 mm c≥10 mm c≥50 mm d≥500 mm d≥500 mm e≥20 mm e≥100 mm...

  • Page 173: Piping Diagram: Outdoor Unit

    Technical data 27.2 Piping diagram: Outdoor unit Piping diagram: 5~12 HP R16T R11T R13T S1NPH S1PH R21T R15T S1NPL Y11S R12T R10T Y10S 3D138283 a Stop valve (liquid) b Service port c Stop valve (high pressure/low pressure) d Stop valve (gas) e Charge port REMA5+REYA8~20A7Y1B Installer and user reference guide...
  • Page 174 Technical data Piping diagram: 14~20 HP R11T R13T S1NPH S1PH R21T R15T S1NPL Y11S R12T R10T 3D138283 Y10S a Stop valve (liquid) b Service port c Stop valve (high pressure/low pressure) d Stop valve (gas) e Charge port REMA5+REYA8~20A7Y1B Installer and user reference guide VRV 5 heat recovery 4P687640-1 –...
  • Page 175 Technical data Charge port / Service port Stop valve Filter Check valve Pressure relief valve Thermistor Solenoid valve Heat sink (PCB) Capillary tube Expansion valve 4‑way valve Propeller fan High pressure switch *PL: low pressure sensor *PH: high pressure sensor Oil separator Accumulator Heat exchanger...

  • Page 176: Wiring Diagram: Outdoor Unit

    Technical data 27.3 Wiring diagram: Outdoor unit Refer to the wiring diagram sticker on the unit. The abbreviations used are listed below: INFORMATION The wiring diagram on the outdoor unit is only for the outdoor unit. For the indoor unit or optional electrical components, refer to the wiring diagram of the indoor unit. Symbols (see below).
  • Page 177 Technical data Legend for wiring diagram Printed circuit board (main) Printed circuit board (noise filter) Printed circuit board (inverter) Printed circuit board (fan) A5P (14~20 HP Printed circuit board (fan) only) A6P (14~20 HP Printed circuit board (sub) only) BS1~BS3 (A1P) Push button switch (MODE, SET, RETURN) DS1, DS2 (A1P) DIP switch...
  • Page 178 Technical data R15T Thermistor (M1C body) R16T (5~12 HP Thermistor (gas injection) only) R21T Thermistor (M1C discharge) S1NPH High pressure sensor S1NPL Low pressure sensor S1PH High pressure switch SEG1~SEG3 (A1P) 7-segment display Mechanical ventilation error input Current sensor Connector Terminal strip Electronic expansion valve (heat exchanger upper) Electronic expansion valve (subcool heat exchanger)

  • Page 179: 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 180 4P687640-1 2022.07 Verantwortung für Energie und Umwelt...

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