Related Manuals for Daikin REYA8A7Y1B9
Summary of Contents for Daikin REYA8A7Y1B9
- Page 1 Installer and user reference guide VRV 5 heat recovery REYA8A7Y1B9 REYA10A7Y1B9 REYA12A7Y1B9 REYA14A7Y1B9 REYA16A7Y1B9 REYA18A7Y1B9 REYA20A7Y1B9 REMA5A7Y1B9...
- Page 2 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................................. 3 Specific installer safety instructions Instructions for equipment using R32 refrigerant......................
- Page 3 Table of contents 10.2.8 Symptom: Noise of air conditioners (Indoor unit) ..................10.2.9 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) ..............10.2.10 Symptom: Noise of air conditioners (Outdoor unit) ..................10.2.11 Symptom: Dust comes out of the unit ......................10.2.12 Symptom: The units can give off odours.......................
- Page 4 Table of contents 18.1.9 Standard multi-outdoor-unit combinations ≤20 HP and free multi-outdoor-unit combinations....18.1.10 Multiple outdoor units: Possible layouts....................... 18.2 Connecting the refrigerant piping..........................18.2.1 About connecting the refrigerant piping ...................... 18.2.2 Precautions when connecting the refrigerant piping ................... 100 18.2.3 Multiple outdoor units: Knockout holes .......................
- Page 5 Table of contents 22 Commissioning 22.1 Overview: Commissioning.............................. 159 22.2 Precautions when commissioning ..........................159 22.3 Checklist before commissioning ............................ 160 22.4 Checklist during commissioning............................. 161 22.5 About the BS unit test run.............................. 162 22.6 About the system test run ............................. 162 22.6.1 To perform a test run ............................
- Page 6 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. The latest revision of the supplied documentation is published on the regional Daikin website and is available via your dealer.
- Page 7 About this document WARNING: FLAMMABLE MATERIAL WARNING: MILDLY FLAMMABLE MATERIAL The refrigerant inside this unit is mildly flammable. 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 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 9 General safety precautions In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods,… Also, at least, following information MUST be provided at an accessible place at the product: ▪...
- Page 10 General safety precautions WARNING Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately. Possible risks: ▪ Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency. ▪ Toxic gas might be produced if refrigerant gas comes into contact with fire. WARNING ALWAYS recover the refrigerant.
- Page 11 General safety precautions Then A siphon tube is NOT present Charge with the cylinder upside down. ▪ Open refrigerant cylinders slowly. ▪ 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.
- Page 12 General safety precautions WARNING ▪ After finishing the electrical work, confirm that each electrical component and terminal inside the switch box is connected securely. ▪ Make sure all covers are closed before starting up the unit. CAUTION ▪ When connecting the power supply: connect the earth cable first, before making the current-carrying connections.
- Page 13 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" [ 77]) WARNING Follow the service space dimensions in this manual to install the unit correctly. See "27.1 Service space: Outdoor unit" [ 182].
- 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" [ 83]) WARNING Fixing method of the outdoor unit MUST be in accordance with the instructions from this manual.
- Page 15 Specific installer safety instructions WARNING ALWAYS recover the refrigerant. Do NOT release them directly into the environment. Use a vacuum pump to evacuate the installation. WARNING During tests, NEVER pressurise the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit). CAUTION Do NOT vent gases into the atmosphere.
- Page 16 Specific installer safety instructions "20 Electrical installation" [ 123]) Electrical installation (see WARNING Electrical wiring MUST be in accordance with the instructions from: ▪ This manual. See "20 Electrical installation" [ 123]. ▪ The wiring diagram, which is delivered with the unit, located at the inside of the service cover.
- Page 17 Specific installer safety instructions 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 18 61]. 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. WARNING ▪ Take precautions to avoid excessive vibration or pulsation to refrigeration piping.
- Page 19 For the user REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide VRV 5 heat recovery 4P797564-1 – 2024.11...
- Page 20 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 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 Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT remove the fan guard. When the fan is rotating at high speed, it will cause injury. CAUTION: Pay attention to the fan! It is dangerous to inspect the unit while the fan is running.
- Page 24 User safety instructions WARNING ▪ Do NOT pierce or burn refrigerant cycle parts. ▪ Do NOT use cleaning materials or means to accelerate the defrosting process other than those recommended by the manufacturer. ▪ Be aware that the refrigerant inside the system is odourless.
- Page 25 User safety instructions CAUTION Do NOT touch the heat exchanger fins. These fins are sharp and could result in cutting injuries. REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide VRV 5 heat recovery 4P797564-1 – 2024.11...
- Page 26 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 27 About the system 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 operation manual when certain features have exclusive model rights or not.
- Page 28 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 29 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 30 Operation Cooling Heating 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 31 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 32 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 33 Operation ▪ 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. Fingers may become caught or the unit may break down. NOTICE ▪...
- Page 34 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 (changeover under centralised control) vanishes.
- Page 35 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 36 Energy saving and optimum operation 8.1 Available main operation methods Basic The refrigerant temperature is fixed independent from the situation. 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 37 Maintenance and service 9 Maintenance and service In this chapter Precautions for maintenance and service..........................Maintenance before a long stop period ..........................Maintenance after a long stop period ........................... About the refrigerant ................................After-sales service................................... 9.5.1 Recommended maintenance and inspection......................9.5.2 Recommended maintenance and inspection cycles.....................
- Page 38 Maintenance and service ▪ Clean air filters and casings of indoor units. Contact your installer or maintenance person to clean air filters and casings of the indoor unit. Maintenance tips and procedures for cleaning are provided in the installation/operation manuals of dedicated indoor units.
- Page 39 Maintenance and service 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. ▪ In case of accidental refrigerant leaks, make sure there are no naked flames. The refrigerant itself is entirely safe, non-toxic and mildly flammable, but it will generate toxic gas when it accidentally leaks into a room where combustible air from fan heaters, gas cookers, etc.
- Page 40 Maintenance and service ▪ Bumps and vibrations are frequent. ▪ Dust, salt, harmful gas or oil mist such as sulphurous acid and hydrogen sulfide may be present in the air. ▪ The machine is started and stopped frequently or operation time is long (sites with 24 hour air-conditioning).
- Page 41 Troubleshooting 10 Troubleshooting If one of the following malfunctions occurs, 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 42 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 43 Troubleshooting Main code Contents 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) Swing flap motor malfunction (indoor)
- Page 44 Troubleshooting Main code Contents Discharge temperature malfunction (outdoor) Abnormal suction temperature (outdoor) Refrigerant overcharge detection High pressure switch malfunction Low pressure switch malfunction 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...
- Page 45 Troubleshooting Main code Contents Centralised address duplication Malfunction in communication centralised control device - indoor unit Faulty wiring indoor/BS unit Auto address malfunction (inconsistency) Airflow rate below the legal limit (for EKEA/EKVDX) The error code is only shown on the user interface of the indoor unit where the error occurs.
- Page 46 Troubleshooting 10.2.5 Symptom: White mist comes out of a unit (Indoor unit) ▪ When humidity is high during cooling operation. If the interior of an indoor unit is extremely contaminated, the temperature distribution inside a room becomes uneven. It is necessary to clean the interior of the indoor unit. Ask your dealer for details on cleaning the unit.
- Page 47 Troubleshooting 10.2.11 Symptom: Dust comes out of the unit When the unit is used for the first time in a long time. This is because dust has gotten into the unit. 10.2.12 Symptom: The units can give off odours The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it again.
- Page 48 Relocation 11 Relocation Contact your dealer to remove and reinstall the entire unit. Moving units requires technical expertise. REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide VRV 5 heat recovery 4P797564-1 – 2024.11...
- Page 49 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 50 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 51 For the installer REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide VRV 5 heat recovery 4P797564-1 – 2024.11...
- Page 52 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 53 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. Note: This product is not designed for repacking.
- Page 54 About the box b Installation manual and operation manual c Additional refrigerant charge label d Installation information sticker e Fluorinated greenhouse gases label f Multilingual fluorinated greenhouse gases label g Declaration of conformity h Piping accessory bag i Transportation stay removal label (only for 5~12 HP) 14.3 Accessory pipes: Diameters Accessory pipes Øa [mm]...
- Page 55 About the box The transportation stay for protecting the unit during transport must be removed. Proceed as shown in the figure and procedure below. 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...
- Page 56 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 57 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 58 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 59 About the units and options Possible standard combinations of outdoor units ▪ REYA10~28 consist of two REYA8~20 or REMA5 units. ▪ REMA5 units cannot be used as standalone outdoor units. ▪ Never combine more than two units to create a multi combination. ▪...
- Page 60 About the units and options Description Model name Heater tape kit for 5~12 HP EKBPH012TA Heater tape kit for 14~20 HP EKBPH020TA See also: "17.1.2 Additional installation site requirements of the outdoor unit in cold climates" [ 80]. Demand PCB (DTA104A61/62*) To enable the power saving consumption control by digital inputs you MUST install the demand PCB.
- Page 61 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 To determine the required safety measures ......................... 16.3.1 Overview: flowchart............................... 16.4 Safety measures..................................16.4.1 Shut-off valves................................ 16.4.2 Alarm ..................................
- Page 62 Special requirements for R32 units Indoor unit installation NOTICE If one or more rooms are connected to the unit using a duct system, make sure air inlet AND outlet are connected directly to the same room by ducting. Do NOT use spaces such as a false ceiling as a duct for the air inlet or outlet.
- Page 63 Special requirements for R32 units Examples 1 Remote controller is not R32 safety system compatible. 2 Indoor units without remote controller are not allowed. a Outdoor unit b BS unit c Indoor unit d Remote controller NOT compatible with R32 safety system e Remote controller compatible with R32 safety system NOT allowed Allowed...
- Page 64 Special requirements for R32 units Lowest underground floor All other floors No safety measure No safety measure Alarm + shut-off valve [BS unit] NOT allowed Alarm + natural ventilation + shut-off valve [BS unit] m [kg] m [kg] [m²] [m²] m [kg] Lowest underground floor All other floors...
- Page 65 Special requirements for R32 units Use the total amount of refrigerant in the system and the smallest area of the room in which the indoor unit is installed/conditioning to check which safety measure is required. Note: When "No safety measure" is required, it is still allowed to apply natural ventilation or alarm or shut-off valve (BS unit) if wanted.
- Page 66 Special requirements for R32 units No safety measure Alarm + shut-off valve [BS unit] Alarm + natural ventilation + shut-off valve [BS unit] m [kg] m Total refrigerant charge in the system [kg] Minimum room area [m²] (a) Lowest underground floor (=Lowest underground floor) (b) All other floors (=All other floors) (c) No safety measure (=No safety measure) (d) Alarm + shut-off valve OR Natural ventilation (=Alarm + shut-off valve OR Natural...
- Page 67 Special requirements for R32 units 16.3.1 Overview: flowchart Procedure to check required countermeasure for indoor unit Determine total amount of See Step 1 in above text refrigerant in the system. Total charge amount [kg] Determine the smallest area out of: - the room where an indoor unit is installed, - each of the rooms served by a ducted indoor unit installed in a different room...
- Page 68 Special requirements for R32 units 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. The maximum amount of refrigerant that can escape in case of a leak is determined by the piping length and indoor heat exchanger size.
- Page 69 Special requirements for R32 units Area of installed/conditioned Maximum total indoor unit capacity class room [m²] 1 indoor unit per branch pipe 2~5 indoor units per branch pipe port port 40 m after 1 branch 90 m after 1 branch ≥45 One indoor unit connected to a single branch pipe port. Two to five indoor units connected to a single branch pipe port, 40 m after first refrigerant branch.
- Page 70 Special requirements for R32 units Port B only serves room 2: use the table under Step 2 to find the maximum capacity class limit of the sum of the indoor units. 42 m² is rounded down to 40 m²: 200. The sum of both indoor units is exactly 100 → OK. Ports C and D are combined and must be considered as one branch pipe.
- Page 71 Special requirements for R32 units ▪ a supervisor remote controller ▪ or a centralised controller. E.g., iTM with external alarm via WAGO module, iTM with built-in alarm, … Note: The remote controllers with built-in alarm will generate a visible and audible warning.
- Page 72 Special requirements for R32 units Examples 1 In case of one R32 safety system compatible remote controller, it should be the master and in the same room of the indoor unit. 2 In case a ducted indoor unit serves a different room than where it is installed, both supply and return air MUST be directly ducted to that room.
- Page 73 Special requirements for R32 units 6 A remote controller installed at a supervised location: ▪ In room: master remote controller in fully functional OR alarm only ▪ In supervisor room: supervisor remote controller a Outdoor unit b BS unit 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...
- Page 74 Special requirements for R32 units If the installation height is more than 2.2 m, higher total refrigerant charge limit of the system can apply. To know the total refrigerant charge limit of the system in case the installation height is more than 2.2 m, refer to the online tool (VRV Xpress).
- Page 75 Special requirements for R32 units NOTICE Indoor units and the bottom of duct openings cannot be installed lower than 1.8 m from the lowest point of the floor, except for floor standing indoor units (e.g. FXNA) Example The total amount of refrigerant in the VRV system is 20 kg. The VRV system has two indoor units which are installed in a space that does not belong to the lowest underground floor of the building.
- Page 76 Special requirements for R32 units b BS unit c Indoor units with no safety measure d Remote controller compatible with R32 safety system Allowed 16.4.5 Overview: flowchart Shut-off valves No safety measure Alarm Natural ventilation BS unit is standard equiped with shut-off valves.
- Page 77 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" [ 61]. 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 78 Unit installation INFORMATION Equipment meets the requirement for commercial and light-industrial location when professionally installed and maintained. CAUTION Appliance is NOT accessible to the general public. Install it in a secured area, protected from easy access. This unit is suitable for installation in a commercial and light industrial environment. The outdoor unit is designed for outdoor installation only, and for the following ambient temperatures: Cooling...
- Page 79 Unit installation a Personal computer or radio b Fuse c Earth leakage protector d User interface e Indoor unit (for illustrative purposes only) f Outdoor unit ▪ In places with weak reception, keep distances of 3 m or more to avoid electromagnetic disturbance of other equipment and use conduit tubes for power and transmission lines.
- Page 80 Unit installation ▪ In vehicles or vessels ▪ Where acidic or alkaline vapour is present Seaside installation. Make sure the outdoor unit is NOT directly exposed to sea winds. This is to prevent corrosion caused by high levels of salt in the air, which might shorten the life of the unit.
- Page 81 Ambient indoor temperature 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. REMA5A7Y1B9+REYA8~20A7Y1B9...
- Page 82 Unit installation 17.2 Opening the unit 17.2.1 About opening the units At certain times, you have to open the unit. Example: ▪ When connecting the electrical wiring ▪ When maintaining or servicing the unit DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. 17.2.2 To open the outdoor unit DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING...
- Page 83 Unit installation 14~20 HP 6× NOTICE When closing the switch box cover, make sure that the sealing material on the lower back side of the cover is NOT caught and bent towards the inside (see figure below). a Switch box cover b Front side c Power supply terminal block d Sealing material...
- Page 84 Unit installation ≥AB (mm) Minimum foundation a Anchor point (4×) 5~12 14~20 1076 1302 ▪ 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 ▪...
- Page 85 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 86 Piping installation ▪ Foreign materials inside pipes (including oils for fabrication) must be ≤30 mg/ 10 m. 18.1.2 Refrigerant piping material Piping material Phosphoric acid deoxidised seamless copper Flare connections Only use annealed material. Piping temper grade and thickness Outer diameter (Ø) Temper grade Thickness (t) Ø...
- Page 87 Piping installation a1~a9 VRV DX indoor units b1~b3 BS units c First indoor branch kit (refnet) d Indoor branch kit (refnet) e Outdoor multi connection kit A~D Piping 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.
- Page 88 Piping installation D: Piping between refrigerant branch kit or BS unit and indoor unit Pipe size for direct connection to indoor unit must be the same as the connection size of the indoor unit (in case indoor unit is VRV DX indoor). Indoor unit capacity index Piping outer diameter [mm] Gas pipe...
- Page 89 Piping installation HP class Refrigerant branch kit 8+10 KHRQ23M29T9 12~20 KHRQ23M64T 22~28 KHRQ23M75T ▪ For refnet joints other than the first branch, select the proper branch kit model based on the total capacity index of all indoor units connected after the refrigerant branch.
- Page 90 Piping installation a, b See table below. c Maximum limit of 16 downstream ports of BS units in refrigerant flow-through. Unused ports must also be counted. E.g. 16 ports=BS12A+BS4A or BS8A+BS4A+BS4A d At least one indoor unit must be connected to a BS unit (BS6~12A: always start from one of the first four ports).
- Page 91 Piping installation Description Model Maximum number of ports of BS units in refrigerant flow-through (c) Maximum number of indoor units connected to BS units in refrigerant flow-through (c) 18.1.7 About the piping length Make sure the piping installation does not exceed the maximum allowable pipe length, the allowable level difference, and the allowable length after branching.
- Page 92 Piping installation 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, equivalent length of branch pipe=6.7 m, and the equivalent length of BS1 depending on the total downstream Capacity Index as indicated in the table above: CI 400 →...
- Page 93 Piping installation 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 94 Piping installation Pipe Maximum length (actual/equivalent) 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/— If the equivalent piping length is more than 90 m, size up the main liquid piping according "18.1.4 To select the piping size" [ 86].
- Page 95 Piping installation Pipe Maximum length (actual/equivalent) Longest pipe from the outdoor unit or VRV DX 165 m/190 m the last multi-outdoor piping branch (a)(b) 120 m/165 m (A+B1+C1, A+B2+C2, A+B1+C3, A+B1+D+C4, A+B1+D+C5) Longest pipe after the first branch or BS 40 m/— unit (B1+C1, B2+C2, B1+C3, B1+D+C4, B1+D+C5) In case of a multi-outdoor setup: 10 m/13 m...
- Page 96 Piping installation a Outdoor unit b VRV DX indoor unit c Branch selector (BS) d VRV DX indoor unit (duct) e VRV DX indoor unit (large duct) 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...
- Page 97 Piping installation Connection with VRV DX indoor units and air handling units (mix layout) and connection with only multiple air handling units (multi layout) a Outdoor unit b VRV DX indoor unit c Branch selector (BS) d VRV DX indoor unit (duct) e VRV DX indoor unit (large duct) f EKEXVA-kit g Air handling unit (AHU)
- Page 98 Piping installation The limitation can be extended to 90 m if the following conditions are met: • The piping length between all indoor units and the BS unit is ≤40 m. • Size-up: → It is required to size-up the liquid piping between the first branch kit or BS unit and the last branch kit or last BS unit.
- Page 99 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 100 Piping installation ▪ Connecting the refrigerant branching kit ▪ Keeping in mind the guidelines for: Brazing Using the stop valves Removing the pinched pipes 18.2.2 Precautions when connecting the refrigerant piping DANGER: RISK OF BURNING/SCALDING NOTICE NEVER install a drier to this unit to guarantee its lifetime. The drying material may dissolve and damage the system.
- Page 101 Piping installation 18.2.3 Multiple outdoor units: Knockout holes Connection Description Front connection Remove the front plate knockout holes to connect. Bottom connection Remove the knockout holes on the bottom frame and route the piping under the bottom. 18.2.4 Using the stop valve and service port To handle the stop valve Take the following guidelines into account: ▪...
- Page 102 Piping installation To open the stop valve 1 Remove the dust cap. 2 Insert a hexagon wrench into the stop valve. 3 FULLY turn the stop valve counterclockwise and tighten until the correct tightening torque value is achieved (see "Tightening torques" [ 103]).
- Page 103 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. 18.2.5 To route the refrigerant piping Installation of refrigerant piping is possible as front connection or side connection (when taken out from the bottom) as shown in the figure below.
- Page 104 Piping installation Unit Installation period Protection method Outdoor unit >1 month Pinch the pipe <1 month Pinch or tape the pipe Indoor unit Regardless of the period Seal the piping and wiring intake holes using sealing material (field supply), otherwise the capacity of the unit will drop and small animals may enter the machine.
- Page 105 Piping installation 4 When all gas and oil is recovered from the pinched piping, disconnect the charge hose and close the service ports. 5 Cut off the lower part of the liquid-, gas-, and high pressure/low pressure gas stop valve pipes along the black line. Use an appropriate tool (e.g. a pipe cutter).
- Page 106 Piping installation ▪ Do NOT use anti-oxidants when brazing pipe joints. Residue can clog pipes and break equipment. ▪ Do NOT use flux when brazing copper-to-copper refrigerant piping. Use phosphor copper brazing filler alloy (BCuP), which does NOT require flux. Flux has an extremely harmful influence on refrigerant piping systems.
- Page 107 Piping installation 7.5° 7.5° a Caution label NOT allowed Allowed ▪ Make sure that the total length of the piping connected to the joint is absolute straight for more than 500 mm. Only if a straight field piping of more than 120 mm is connected, more than 500 mm of straight section can be ensured.
- Page 108 Piping installation 18.3 Checking the refrigerant piping 18.3.1 About checking the refrigerant piping Refrigerant piping works are Finish piping work finished? The indoor units / BS units / outdoor unit are already powered ON? Use procedure: "Method 1: Before power ON (regular method)"...
- Page 109 Piping installation If there is a possibility of moisture being present in the refrigerant piping (for example, water may have entered the piping), first carry out the vacuum drying procedure below until all moisture has been removed. All piping inside the unit has been factory tested for leaks. Only field installed refrigerant piping needs to be checked.
- Page 110 Piping installation Valve Status Valve B Open Valve C Open Valve D Open Liquid line stop valve Close Gas line stop valve Close High pressure/low pressure gas line stop valve Close NOTICE The connections to the indoor units and all indoor units should also be leak and vacuum tested.
- Page 111 Piping installation 18.3.5 To perform vacuum drying NOTICE The connections to the indoor units and all indoor units should also be leak and vacuum tested. Keep, if existing, all (field supplied) field valves to the indoor units open as well. Leak test and vacuum drying should be done before the power supply is set to the unit.
- Page 112 Piping installation 1 Insulate and fix the refrigerant piping and cables as follows: a Liquid piping b Gas piping c High pressure / low pressure gas piping d Finishing tape e Interconnection cable (F1/F2) f Insulation 2 Install the service cover. Inside the outdoor unit To insulate the refrigerant piping, proceed as follows: a Sealant...
- Page 113 Piping installation 18.3.7 To check for leaks after charging refrigerant After charging refrigerant in the system an additional leak test must be performed. Refer to "19.10 To check refrigerant piping joints for leaks after charging refrigerant" [ 122]. REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide VRV 5 heat recovery 4P797564-1 –...
- Page 114 Charging refrigerant 19 Charging refrigerant In this chapter 19.1 Precautions when charging refrigerant ..........................114 19.2 About charging refrigerant..............................115 19.3 About the refrigerant ................................116 19.4 To determine the additional refrigerant amount ........................116 19.5 To charge refrigerant: Flow chart ............................119 19.6 To charge refrigerant................................
- Page 115 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" [ 140]). If a malfunction code is present, see "25.3 Solving problems based on error codes" [ 171].
- Page 116 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 117 Charging refrigerant NOTICE The total refrigerant charge amount in the system MUST always be lower than 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+ ×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 1...5 A~C Parameters A~C (see below) INFORMATION...
- Page 118 Charging refrigerant 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. Indoor units Maximum Total CR CR per type Type...
- Page 119 Charging refrigerant 19.5 To charge refrigerant: Flow chart Step 1 Calculate additional refrigerant charge amount: R [kg] p < p > Step 2 + 3 • Close valve A • Open valve B to the liquid line • Execute pre-charging amount: Q (kg) Q<R Q>R Step 4a...
- Page 120 Charging refrigerant 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. Disconnect the manifold from the gas lines. 2 Connect the manifold valve B to the service port of the liquid stop valve.
- Page 121 Charging refrigerant 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 122 Charging refrigerant 19.8 Checks after charging refrigerant ▪ Are all stop valves open? ▪ Is the amount of refrigerant, that has been added, recorded on the refrigerant charge label? NOTICE Make sure to open all stop valves after (pre-) charging the refrigerant. Operating with the stop valves closed will damage the compressor.
- Page 123 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 ..........................123 20.1.1 Precautions when connecting the electrical wiring ....................123 20.1.2 About the electrical wiring.............................
- Page 124 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 125 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 126 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 interconnection wiring B Master/slave interconnection wiring NOTICE Sheathed and shielded cables are required for interconnection wiring between...
- Page 127 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 128 Electrical installation Use the following methods for installing wires: Wire type Installation method Single-core wire AA´ A´ Stranded conductor wire twisted to "solid-like" connection a Curled wire (single-core or twisted stranded conductor wire) b Screw c Flat washer Stranded conductor wire with round crimp-style terminal a Terminal...
- Page 129 Electrical installation Single outdoor unit Model [Ω] Minimum S value [kVA] REYA8 — 2789 REYA10 — 3810 REYA12 — 4157 REYA14 — 4676 REYA16 — 5369 REYA18 — 6062 REYA20 — 7274 Multiple outdoor units Model [Ω] Minimum S value [kVA] REYA10 —...
- Page 130 Electrical installation 20.1.6 Specifications of standard wiring components For standard combinations Component Single outdoor units REMA5 REYA8 REYA10 REYA12 REYA14 REYA16 REYA18 REYA20 Power supply cable MCA 15 A 16.1 A 22 A 24 A 27 A 31 A 35 A 42 A Voltage 380-415 V Phase Frequency 50 Hz Wire size 5 core cable Must comply with national wiring regulation.
- Page 131 Electrical installation Example Combining the REYA24 by using the REYA10 and REYA14. ▪ Minimum circuit ampacity of the REYA10=22.0 A ▪ Minimum circuit ampacity of the REYA14=27.0 A Accordingly, the minimum circuit ampacity of the REYA24=22.0+27.0=49.0 A Multiply the above result by 1.1: (49.0 A×1.1)=53.9 A, so the recommended fuse capacity would be 63 A.
- Page 132 Electrical installation 20.2 To route and fix the interconnection wiring NOTICE Sheathed and shielded cables are required for interconnection wiring between outdoor unit and BS unit. Interconnection wiring can be routed through the front side only. Fix it to the upper mounting hole.
- Page 133 Electrical installation Fix to the indicated plastic brackets using field supplied clamping material. The indoor F1/F2 interconnection wiring MUST be shielded wire. The shielding is earthed via a metal P-clamp (e) (only at outdoor unit). Strip the insulation up to the shielding mesh, to provide full contact of the earth with the shielding.
- Page 134 Electrical installation a Liquid piping b Gas piping c High pressure / low pressure gas piping d Finishing tape e Interconnection cable (F1/F2) 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.
- Page 135 Electrical installation 5~12 HP 14~20 HP a Power supply (380~415 V, 3N~ 50 Hz) b Fuse c Earth leakage protector d Earth wire e Power supply terminal block f Connect each power wire: RED to L1, WHT to L2, BLK to L3 and BLU to N g Earth wire (GRN/YLW) h Tie wrap i Cup washer...
- Page 136 Electrical installation Attach both cables to the power supply terminal as indicated below: L1 L2 L3 N 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).
- Page 137 Electrical installation 5~12 HP 14~20 HP a Output cable (SVEO or SVS)(field supply) b Cable tie (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 138 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................................138 21.1.1 About making field settings ...........................
- Page 139 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 140 Configuration 2× a Front plate b Main PCB with three 7‑segment displays and three push buttons c Switch 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 switch box cover and to close the front plate's inspection cover after the job is finished.
- Page 141 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 142 Configuration 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 1 setting 10 is addressed and selected, return value is monitored information 5 To quit mode 1, push BS1 one time.
- Page 143 Configuration 5 To change the value of the setting, push BS2 till the required value appears on the 7‑segment display indication. 6 Push BS3 one time to validate the change. 7 Push BS3 to start operation according to the chosen setting. 8 Push BS1 one time to quit mode 2.
- Page 144 Configuration ▪ The first method is to enable a forced power consumption limitation by field setting. The unit will always operate at the selected power consumption limitation. ▪ The second method is to enable power consumption limitation based on an external input.
- Page 145 Configuration For instructions on how to use the leak detection function, see "21.3 Using the leak detection function" [ 157]. [1‑34] Shows the remaining days until the next automatic leak detection (if automatic leak detection function is activated). When the automatic leak detection function was activated through mode 2 settings, it is possible to see within how many days, the automatic leak detection will be performed.
- Page 146 Configuration For more information and advice about the impact of these settings, see "21.2 Energy saving and optimum operation" [ 152]. [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 147 Configuration In order to increase the static pressure the outdoor unit fan is delivering, this setting should be activated. For details about this setting, see technical specifications. [2‑18] Description 0 (default) Deactivated. Activated. [2‑20] Manual additional refrigerant charge/BS/indoor unit connection check [2‑20] Description 0 (default)
- Page 148 Configuration [2‑22] Description Level 1 Level 5<Level 4<Level 3<Level 2<Level 1 Level 2 Level 3 Level 4 Level 5 [2‑25] Low noise operation level via the external control adaptor. If the system needs to be running under low noise operation conditions when an external signal is sent to the unit, this setting defines the level of low noise that will be applied.
- Page 149 Configuration 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. The level is according to the table.
- Page 150 Configuration [2‑35] Description 1 (default) — Other changes/limitations to the circuit apply. For more information see "18.1.8 Single outdoor units and standard multi-outdoor-unit combinations >20 HP" [ 93] and "18.1.9 Standard multi-outdoor-unit combinations ≤20 HP and free multi-outdoor-unit combinations" [ 95]. [2‑45] BS unit shut-off valve setting. [2‑45] Description 0 (default)
- Page 151 Configuration [2‑58] Description 10 years [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" [ 61] or refer to the remote controller installation and user reference guide.
- Page 152 Configuration [2‑82] Heating comfort setting Powerful For more information and advice about the impact of these settings, see "21.2 Energy saving and optimum operation" [ 152]. [2‑88] Automatic leak detection activation. When you want to use the automatic leak detection function you have to activate this setting.
- Page 153 Configuration 21.2.1 Available main operation methods Basic The refrigerant temperature is fixed independent from the situation. To activate this in… Change… Cooling operation [2‑8]=2 Heating operation [2‑9]=6 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 154 Configuration [2‑8] target (°C) [2‑9] target (°C) 21.2.2 Available comfort settings For each of above modes a comfort level can be selected. The comfort level is related to the timing and the effort (energy consumption) which is put in achieving a certain room temperature by temporarily changing the refrigerant temperature to different values in order to achieve requested conditions more quickly.
- Page 155 Configuration start up moment. The start up occurs under the condition which is defined by the operation mode above. 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 156 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 157 Configuration 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 was input into the system's logic (see [2‑14]).
- Page 158 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 159 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 160 Commissioning CAUTION Do NOT perform the test operation while working on the indoor unit(s). 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 161 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 interconnection 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 162 Commissioning 22.5 About the BS unit test run The BS unit test run has to be performed on all BS units in the system, before the test run of the outdoor unit. The BS unit test run has to confirm that the required safety measures are properly installed.
- Page 163 Commissioning NOTICE Turn ON the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor. 4 Make sure the default (idle) situation is existing; see "21.1.4 To access mode 1 2" [ ...
- Page 164 Commissioning 22.7 To perform a BS/indoor unit connection check This test run can be performed to confirm if wiring and piping connections between indoor units and BS units are matching. For the safe operation of the system, it is mandatory to confirm the wiring and piping connections between the indoor units and BS units.
- Page 165 Commissioning Code Description Indicates an indoor unit is not compatible with this function. 4 Check the results on the outdoor unit 7‑segment display. Completion Description Normal completion " " on the 7‑segment display. Abnormal completion Indication of malfunction code on the 7‑segment display. Refer to "22.6.2 Correcting after abnormal completion of the test...
- Page 166 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 167 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 168 Maintenance and service voltage of the capacitor in the main circuit is less than 50 V DC. If the voltage 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.
- Page 169 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 170 Maintenance and service d Wait for two minutes to allow the system to close the valves e Turn off the system power f Perform maintenance and servicing on the BS unit REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide VRV 5 heat recovery 4P797564-1 –...
- Page 171 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 ..............................171 25.2 Precautions when troubleshooting............................171 25.3 Solving problems based on error codes..........................171 25.3.1 Error codes: Overview............................
- Page 172 Troubleshooting 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. The malfunction code will be displayed intermittent. Example: Code Example Main code...
- Page 173 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 operating, but the indoor unit in scope will stop operating. Refer to the service manual for more information.
- Page 174 Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 Low pressure malfunction: ▪ Open stop valves. ▪ Stop valve closed ▪ Check refrigerant amount+recharge unit. ▪ Refrigerant shortage ▪ Check the user interface's display ▪ Indoor unit malfunction interconnection wiring between the outdoor unit and the indoor unit.
- Page 175 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 176 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 177 Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 Indoor unit communication error Check user interface connection. Malfunction code: faulty wiring to Check Q1/Q2wiring. Q1/Q2 Too many indoor units are Check indoor unit amount and total connected to F1/F2 line capacity connected.
- Page 178 Troubleshooting Main Sub code Cause Solution SVEO code Master Slave 1 — Outdoor unit is out of temperature Retry when ambient conditions are range 4~43°C for leak detection satisfied. operation. — Too low pressure was noticed Restart leak detection operation. during leak detection operation —...
- Page 179 Troubleshooting 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 applicable).
- Page 180 Troubleshooting Note: An optional output PCB for the indoor unit can be added to provide output for external device. The output PCB will trigger in case a leak is detected. For exact model name see option list of the indoor unit. For more information about this option, refer to the installation manual of the optional output PCB Note: Some centralised controllers can also be used as supervisor remote controller.
- Page 181 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. REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide VRV 5 heat recovery...
- Page 182 ▪ 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 27.1 Service space: Outdoor unit ..............................182 27.2...
- Page 183 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 184 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 REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide...
- Page 185 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 REMA5A7Y1B9+REYA8~20A7Y1B9 Installer and user reference guide VRV 5 heat recovery 4P797564-1 –...
- Page 186 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 187 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 188 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 189 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 190 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 192 4P797564-1 2024.11...
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