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Summary of Contents for Daikin BS4A14AJV1B9
- Page 1 Installer and user reference guide VRV 5 branch selector unit BS4A14AJV1B9 BS6A14AJV1B9 BS8A14AJV1B9 BS10A14AJV1B9 BS12A14AJV1B9...
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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................................. 3 Specific installer safety instructions Instructions for equipment using R32 refrigerant...................... - Page 3 Table of contents 13.5 Combinations of ventilated enclosure configurations ....................13.6 Combinations of safety measures..........................14 Unit installation 14.1 Preparing the installation site ............................14.1.1 Installation site requirements of the unit ..................... 14.2 Possible configurations ..............................14.3 Opening and closing the unit ............................14.3.1 About opening the unit..........................
- Page 4 Table of contents 20 Maintenance and service 20.1 Before the maintenance and service of the BS unit...................... 115 20.2 BS unit maintenance and service label .......................... 115 21 Troubleshooting 21.1 Solving problems based on error codes ........................116 21.1.1 Error codes: Overview ........................... 116 22 Disposal 23 Technical data 23.1...
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Page 5: About This Document
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). 1.1 Meaning of warnings and symbols DANGER Indicates a situation that results in death or serious injury. - Page 6 About this document DANGER: RISK OF ELECTROCUTION Indicates a situation that could result in electrocution. DANGER: RISK OF BURNING/SCALDING Indicates a situation that could result in burning/scalding because of extreme hot or cold temperatures. DANGER: RISK OF EXPLOSION Indicates a situation that could result in explosion. WARNING Indicates a situation that could result in death or serious injury.
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Page 7: General Safety Precautions
WARNING Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY use accessories, optional equipment and spare parts made or approved by Daikin unless otherwise specified. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). -
Page 8: Installation Site
General safety precautions CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit. 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,…... - Page 9 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.
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Page 10: Electrical
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 11 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.
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Page 12: Specific Installer Safety Instructions
Specific installer safety instructions 3 Specific installer safety instructions Always observe the following safety instructions and regulations. Unit installation (see "14 Unit installation" [ 62]) DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. WARNING The installation MUST comply with the requirements that apply to this R32 equipment. - Page 13 Specific installer safety instructions WARNING The appliance shall be stored/installed as follows: ▪ in such a way as to prevent mechanical damage. ▪ in a well-ventilated room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).
- Page 14 Specific installer safety instructions WARNING Overheated insulation can start to burn. Possible consequence: fire. ▪ When performing brazing work header or branch pipes, cool all other header and branch pipes by wrapping them in wet cloths. CAUTION Install the refrigerant piping or components in a position where they are unlikely to be exposed to any substance which may corrode components containing refrigerant, unless the components are constructed of materials that are inherently resistant to corrosion or are suitably protected against corrosion.
- Page 15 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 shocks. ▪...
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Page 16: Instructions For Equipment Using R32 Refrigerant
42]. 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. BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit... - Page 17 Specific installer safety instructions WARNING Refrigerant sensors of the refrigerant detection system shall only be replaced with refrigerant sensors specified by the appliance manufacturer. WARNING ▪ 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.
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Page 18: For The User
For the user BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit 4P797566-1 – 2024.11... -
Page 19: 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 20: Instructions For Safe Operation
User safety instructions ▪ Units are marked with the following symbol: This means that electrical and electronic products may NOT be mixed with unsorted household waste. Do NOT try to dismantle the system yourself: dismantling the system, treatment of the refrigerant, of oil and of other parts MUST be done by an authorised installer and MUST comply with applicable legislation. - Page 21 User safety instructions WARNING This unit contains electrical and hot parts. WARNING Before operating the unit, be sure the installation has been carried out correctly by an installer. WARNING Do NOT obstruct the opening of the air inlet (damper). WARNING The unit is equipped with a refrigerant leak detection system for safety.
- Page 22 User safety instructions CAUTION This unit is equipped with electrically powered safety measures. In order to be effective, the unit must be electrically powered at all times after installation, except for short service periods. CAUTION After a long use, check the unit stand and fitting for damage.
- Page 23 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.
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Page 24: About The System
About the system 5 About the system 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 25: Before Operation
Before operation 6 Before operation CAUTION "4 User safety instructions" [ 19] to acknowledge all related safety instructions. NOTICE NEVER inspect or service the unit by yourself. Ask a qualified service person to perform this work. NOTICE Turn ON the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor. -
Page 26: Maintenance And Service
Maintenance and service 7 Maintenance and service In this chapter Precautions for maintenance and service..........................Periodic check of the ventilated enclosure..........................About the refrigerant ................................7.3.1 About the refrigerant leakage sensor........................7.1 Precautions for maintenance and service CAUTION "4 User safety instructions" [ 19] to acknowledge all related safety instructions. -
Page 27: About The Refrigerant Leakage Sensor
Maintenance and service Periodical inspections for refrigerant leaks may be required depending on the applicable legislation. Contact your installer for more information. NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO equivalent. -
Page 28: Troubleshooting
Troubleshooting 8 Troubleshooting If one of the following malfunctions occurs, take the measures shown below and contact your dealer. WARNING In case of a refrigerant leak, the system needs power to contain the problem. 1. Do NOT turn OFF the power supply. 2. -
Page 29: Symptom: Noise
Troubleshooting 8.1.1 Symptom: noise ▪ A "zeen" sound is heard immediately after the power supply is turned on. The electronic expansion valve inside the BS unit starts working and makes the noise. Its volume will reduce in about a minute. ▪... -
Page 30: Relocation
Relocation 9 Relocation Contact your dealer to remove and reinstall the entire unit. Moving units requires technical expertise. BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit 4P797566-1 – 2024.11... -
Page 31: Disposal
Disposal 10 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 32: For The Installer
For the installer BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit 4P797566-1 – 2024.11... -
Page 33: About The Box
About the box 11 About the box NOTICE Before installation, check the packaging and parts for damage. Make sure that the shipment is complete. 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 34 About the box ▪ Lift the unit via the cut-outs in the cardboard. For the BS10~12A units, it is advised to lift with more than 2 people. ▪ When moving the unit, carry it slowly. ▪ After unpacking, lift the unit via the hanger brackets. Do not exert any pressure on other parts, especially not on the refrigerant piping and drain piping.
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Page 35: To Unpack The Unit
About the box 11.2 To unpack the unit For BS4A 1 Cut and remove the straps. 2 Remove the box parts as indicated in the picture. For BS6~12A 1 Cut and remove the inner straps. BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit 4P797566-1 –... - Page 36 About the box 2 Remove the pallet. 3 Cut and remove the outer straps. 4 Remove the box parts as indicated in the picture. BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit 4P797566-1 – 2024.11...
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Page 37: To Remove The Accessories
About the box 11.3 To remove the accessories 3/1x 4/2x 8/11x 3/1x 4/2x a Installation and operation manual b General safety precautions c Drain hose d Metal clamp e Sealing material (large) BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit 4P797566-1 –... - Page 38 About the box f Sealing material (small) g Sealing material (thin sheet) h Insulation tube for stopper pipe Ø9.5 mm (3× for BS4A, 1× for BS6~12A) i Insulation tube for stopper pipe Ø15.9 mm (4× for BS4A, 2× for BS6~12A) j Insulation tube for stopper pipe Ø22.2 mm k Tie wraps (8×...
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Page 39: About The Unit And Options
About the unit and options 12 About the unit and options In this chapter 12.1 Identification................................... 12.1.1 Identification label: BS unit............................ 12.2 About the operation range..............................12.3 System layout..................................12.4 Combining units and options ..............................12.4.1 About combining units and options ........................12.4.2 Possible options for the BS unit.......................... -
Page 40: Combining Units And Options
About the unit and options a Heat recovery outdoor unit b Branch selector (BS) c VRV direct expansion (DX) indoor unit d Remote controller in normal mode e Remote controller in alarm only mode f Remote controller in supervisor mode (mandatory in some situations) g Centralised controller (optional) h Option PCB (optional) Refrigerant piping... - Page 41 About the unit and options ▪ Route the power supply wire and relay harness of the drain up kit inside the BS unit as shown in the figure below. ▪ Position the ferrite core on the relay harness of the drain up kit inside the switch box of the BS unit.
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Page 42: Special Requirements For R32 Units
Special requirements for R32 units 13 Special requirements for R32 units 13.1 Installation space requirements NOTICE ▪ The pipework shall be securely mounted and guarded protected from physical damage. ▪ Keep the pipework installation to a minimum. 13.2 System layout requirements The VRV 5 heat recovery uses R32 refrigerant, which is rated as A2L and is mildly flammable. -
Page 43: To Determine The Required Safety Measures
Special requirements for R32 units SVS output is a potential-free contact on terminal X6M that closes in case a refrigerant leak is detected or if the R32 sensor of the BS unit fails or is disconnected. For more information about the SVS output, see "16.5 ... - Page 44 Special requirements for R32 units [m²] [m²] m [kg] Lowest underground floor All other floors m [kg] Lowest underground floor All other floors No safety measure External alarm OR No safety measure No safety measure External alarm OR No safety measure Natural Ventilation Natural Ventilation m Total refrigerant charge in the system [kg]...
- Page 45 Special requirements for R32 units OTHER FLOORS LOWEST UNDERGROUND FLOOR The graphs and table are based on an installation height of the BS unit between 1.8 m and 2.2 m. The installation height is the height of the bottom of the BS unit to the floor.
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Page 46: Overview: Flowchart
Special requirements for R32 units 13.3.1 Overview: flowchart Procedure to check required countermeasure for BS unit Determine total amount of See Step 1 in above text refrigerant in the system. Total charge amount [kg] Determine area of room in which See Step 2 in above text BS unit is installed. -
Page 47: Safety Measures
Special requirements for R32 units 13.4 Safety measures 13.4.1 No safety measure When the room area is sufficiently large, no safety measures are required. This also includes a BS unit installed in the lowest underground floor. The duct connection must be replaced with the duct closing plate accessory (see "14.5.2 To install the duct closing plate" [ 73]). -
Page 48: Natural Ventilation
Special requirements for R32 units detected in any BS unit of the system. Note: An address number for the supervisor remote controller must be assigned to the BS unit. See "17.1 Making field settings" [ 98]. When the R32 sensor in the BS unit detects a refrigerant leak, the SVS output will close and activate the alarm. - Page 49 Special requirements for R32 units Area of the room with natural ventilation [m²] Minimum room area of the space in which the BS unit is installed [m²] Note: Round down the derived values. The graphs and table are based on an installation height of the BS unit between 1.8 m and 2.2 m.
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Page 50: Ventilated Enclosure
Special requirements for R32 units ▪ The opening must be ≥0.006 m² (50% of A nvmin ▪ The bottom of the upper opening must be ≥1500 mm above the floor ▪ The height of the opening is ≥20 mm Note: The requirement for the upper opening can be met by false ceilings, ventilation ducts or similar arrangements that provide an airflow path between the connected rooms. - Page 51 Special requirements for R32 units A ventilated enclosure is required as a safety measure in case other safety measures (see "13.4.1 No safety measure" [ 47], "13.4.3 Natural ventilation" [ 48] and "13.4.2 External alarm" [ 47]) are not allowed. For the ventilated enclosure safety measure, ductwork and an extraction fan MUST be installed.
- Page 52 Special requirements for R32 units 4200 [kg] [m²] [kg] [m²] 4000 3800 3600 3400 10.1 3200 15.8 3000 22.8 2800 31.0 2600 40.5 2400 51.3 2200 63.3 2000 76.6 91.2 1800 1400 1200 1013 1000 1282 1583 1915 2279 2675 3102 3561 25 30 35 40 45 50 55 60 65...
- Page 53 Special requirements for R32 units Note: The internal pressure of the BS unit should not be more than 350 Pa below the pressure of the surroundings. Write down the pressure drop generated by all the components in the evacuation channel for the selected airflow rate. For the BS unit, use the curve that presents the pressure at the outlet (P ) in function of the airflow rate (AFR ).
- Page 54 Special requirements for R32 units - 47.5 -100 -150 -200 -250 -300 [m³/h] Use the curves, with instructions how to read them, of the manufacturer of the components to find the pressure drop generated by all components in the ductwork. A conversion of units might be required. Beware that for ducting, the pressure drop from the manufacturer might be given per unit length of ducting (units are for example Pa/m).
- Page 55 Special requirements for R32 units Note: For more information, see "17.1 Making field settings" [ 98]. BS unit test run Before BS unit operation, it is required to perform a test run that simulates a refrigerant leak. See "18.3 BS unit test run" [ 108] for more details.
- Page 56 Special requirements for R32 units Field settings Multiple BS units in parallel – one extraction fan Code Description Value [2-0] Cluster indication 1: enable [2-1] Cluster number [2-2] Cluster configuration 0 (default): parallel [2-4] Safety measures 1 (default): enable [2-7] Ventilated enclosure 1 (default): enable Set on ALL main PCBs (A1P, A2P and A3P) of the BS unit.
- Page 57 Special requirements for R32 units d Extraction fan output terminal – connected e Interconnection wiring terminal f Extraction fan A Outdoor unit A B Outdoor unit B Interconnection wiring Extraction fan output wiring Allowed NOT allowed The option kit EKBSDCK is required each time a duct is connected to the air inlet (damper side) of the BS unit.
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Page 58: Overview: Flowchart
Special requirements for R32 units 13.4.5 Overview: flowchart §13.4.1 §13.4.2 §13.4.3 §13.4.4 Ventilated enclosure No safety measure External alarm Natural ventilation One BS unit BS units in parallel BS units in series Determine total room area (= total area of the Connect an external alarm (field supply) to the space with natural ventilation and the space in SVS output of the BS unit. -
Page 59: Combinations Of Ventilated Enclosure Configurations
Special requirements for R32 units 13.5 Combinations of ventilated enclosure configurations It is possible to combine different ventilated enclosure configurations (clusters) in the same system. To do this, assign a unique cluster value to each cluster. All the BS units in the same cluster need to be assigned the same cluster number. Example a Outdoor unit b BS unit belonging to cluster 1... -
Page 60: Combinations Of Safety Measures
Special requirements for R32 units BS unit test run Before BS unit operation, it is required to perform a test run that simulates a refrigerant leak. See "18.3 BS unit test run" [ 108] for more details. 13.6 Combinations of safety measures It is possible to combine BS units with different safety measures (no safety measures, external alarm, natural ventilation and ventilated enclosure) in the same system. - Page 61 Special requirements for R32 units Set on ALL main PCBs (A1P, A2P and A3P) of the BS unit. Set ONLY on the LEFTMOST main PCB (A1P) of the BS unit. BS units (e) with natural ventilation Code Description Value [2-0] Cluster indication 0 (default): disable [2-4]...
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Page 62: Unit Installation
Unit installation 14 Unit installation WARNING The installation MUST comply with the requirements that apply to this R32 equipment. For more information, see "13 Special requirements for R32 units" [ 42]. In this chapter 14.1 Preparing the installation site ..............................14.1.1 Installation site requirements of the unit......................14.2 Possible configurations................................ - Page 63 Unit installation NOTICE If the equipment is installed closer than 30 m to a residential location, the professional installer MUST evaluate the EMC situation before installation. NOTICE The installation and any maintenance requires a professional with relevant EMC experience to install any specific EMC mitigation measures defined in the user instructions.
- Page 64 Unit installation ▪ Where acidic or alkaline vapour is present. ▪ In vehicles or vessels. It is NOT recommended to install the unit in the following places because it may shorten the life of the unit: ▪ In places where voltage fluctuates a lot. ▪...
- Page 65 Unit installation a T-joint ▪ Spacing. Respect the following requirements: d ≥ 500 c ≥ 485 c ≥ 485 b ≥ 720 [mm] ≥5 (≥49.5) ≥100 A≥1800 f: 875 f: 450 [mm] A Minimum distance to the floor a Switch box b Maintenance space c Minimum connection space for refrigerant piping coming from the outdoor unit, or for piping coming from or going to another BS unit, drain piping and ducting...
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Page 66: Possible Configurations
Unit installation 450×450 [mm] A Ceiling opening size: 800 mm (BS4A) 1200 mm (BS6~8A) 1600 mm (BS10~12A) 14.2 Possible configurations Refrigerant piping A Refrigerant piping connected to left side only B Refrigerant piping connected to right side only C Refrigerant piping connected to both sides (flow-through) 1 From outdoor or from BS unit 2 From outdoor or from/to BS unit a Stopper pipes (accessory) -
Page 67: Opening And Closing The Unit
Unit installation A’ B’ A Default flow. Only ducting on the air outlet side. (Default configuration) A' Default flow. Ducting on both sides. B Reversed flow. Only ducting on the air outlet side. B' Reversed flow. Ducting on both sides. C No extraction ventilation installed. -
Page 68: To Open The Unit
Unit installation 14.3.2 To open the unit DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. 3× 14.3.3 To close the unit 3× ≤ 3.2 N·m 14.4 Mounting the unit 14.4.1 To mount the unit INFORMATION Optional equipment. - Page 69 Unit installation b Suspension bolt pitch (width): 630 mm (BS4A) 1030 mm (BS6~8A) 1430 mm (BS10~12A) 2 Install a nut, two washers and a double nut onto each suspension bolt. Leave enough space for maneuvering with the unit between the nut and double nut. 3 Position the unit by hooking the hanger brackets of the unit around the suspension bolts, in between the two washers.
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Page 70: To Connect The Drain Piping
Unit installation ≤ 1° ≤ 1° a Drain socket b Switch box 14.4.2 To connect the drain piping NOTICE Incorrect connection of the drain hose might cause leaks, and damage the installation space and surroundings. 1 Push the drain hose as far as possible over the drain pipe connection. a Drain pipe connection (attached to the unit) b Drain hose (accessory) 2 Position the metal clamp around the drain hose, as close to the unit as... -
Page 71: To Install The Drain Piping
Unit installation 2× ≤ 3.2 N·m ▪ Gradually add water through the inspection hole. ▪ Verify that the water flows through the drain hose and check for water leaks. ▪ Close the inspection hole. 5 Wind the large, self-adhesive sealing pad (accessory) around the metal clamp and drain hose. -
Page 72: Installing The Ventilation Ducting
Unit installation 2 Provide a downwards slope (at least 1/100) to prevent air from being trapped in the piping. If unable to provide an adequate slope for the drain, use the drain up kit (K-KDU303KVE). 3 Insulate the complete drain piping in the building to prevent condensation. 14.5 Installing the ventilation ducting 14.5.1 To install the ducting The ducting is field supplied. -
Page 73: To Install The Duct Closing Plate
Unit installation ≥1000 ≥1000 (mm) a BS unit b Duct connection (air outlet) c Option kit EKBSDCK (air inlet) d Duct (field supply) e Insulation (field supply) f Sealing material (accessory) g Screw (field supply) 4 Protect the ducting against reverse airflow from wind. 5 Prevent that animals, debris and dust can enter the ducting. -
Page 74: To Switch The Air In- And Outlet Side
Unit installation 14.5.3 To switch the air in- and outlet side To lower the switch box 1 Open the BS unit. See "14.3.2 To open the unit" [ 68]. 2 Remove the four screws. 3 Store the screws in a safe place. 4 Loosen the M8 bolts two turns without removing them. - Page 75 Unit installation 1× a Connector b Earth wire screw c Damper earth wire d Cable tie 3 Cut the cable ties that fix the damper wire to the pipe, and the one that bundles the damper wire. a Damper wire b Cable tie 4 Remove the damper: ▪...
- Page 76 Unit installation 4× To install the duct connection 1 Position the duct connection onto the other side of the unit. 2 Attach the duct connection with four screws. 4× ≤ 3.2 N•m To install the damper 1 Install the damper on the other side of the unit: ▪...
- Page 77 Unit installation 1× a Connector b Earth wire screw c Damper earth wire d Cable tie 3 Install the leftmost wire fixing plate. It holds the damper wire in place. ▪ Restore the insulation of the wiring fixing plate by applying the small accessory insulation piece on top of the old, flattened insulation.
- Page 78 Unit installation ▪ Attach the damper wire on the refrigerant piping, in the indicated places. Make sure the wire is tight, but do not pull on it excessively. ▪ Leave 20 cm of wire between the fixation on the pipe and the entry into the switch box in order to be able to put back the switch box.
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Page 79: Piping Installation
Piping installation 15 Piping installation CAUTION "3 Specific installer safety instructions" [ 12] to make sure this installation complies with all safety regulations. In this chapter 15.1 Installation limitations ................................15.1.1 Piping installation limitation ..........................15.2 Preparing refrigerant piping ..............................15.2.1 Refrigerant piping requirements ........................... -
Page 80: Piping Installation Limitation
Piping installation f Cooling only indoor units cannot be installed. All indoor units must be connected to the branch pipes of a BS unit g BS unit Description Model 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 400 600... -
Page 81: Preparing Refrigerant Piping
Piping installation 15.2 Preparing refrigerant piping 15.2.1 Refrigerant piping requirements NOTICE The piping and other pressure-containing parts shall be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper for refrigerant piping. INFORMATION Also read the precautions and requirements in the "2 ... -
Page 82: Connecting The Refrigerant Piping
Piping installation 15.3 Connecting the refrigerant piping 15.3.1 To connect the refrigerant piping a BS unit b Liquid pipe (field supply) c HP/LP gas pipe (field supply) d Suction gas pipe (field supply) e Reducing joints and insulation tubes (accessory) f Indoor unit connection set g Liquid pipe (field supply) h Gas pipe (field supply) -
Page 83: To Braze The Pipe End
Piping installation Ø 9.5 mm Ø 6.35 mm Ø 15.9 mm Ø 12.7 mm Ø 9.5 mm a Liquid branch pipe b Gas branch pipe 3 Connect the branch pipes. The liquid and gas branch pipe diameters to be used depend on the connected indoor unit capacity class. For information on which branch pipes to connect, see "To set the DIP switches when joining branch pipe... -
Page 84: Joining Branch Pipe Ports
Piping installation ▪ 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. For instance, if chlorine based flux is used, it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will deteriorate the refrigerant oil. - Page 85 Piping installation a Insulation tube (field supply) b Tape (field supply) c Insulation tube (BS unit) d Adherence surface e BS unit 1 Install an insulation tube (a) over the pipe and against the insulation tube (c) on the BS unit. 2 Apply tape (b) to close the seam.
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Page 86: Electrical Installation
Electrical installation 16 Electrical installation CAUTION "3 Specific installer safety instructions" [ 12] to make sure this installation complies with all safety regulations. In this chapter 16.1 About connecting the electrical wiring ..........................16.1.1 Precautions when connecting the electrical wiring ....................16.1.2 Specifications of standard wiring components ..................... -
Page 87: Specifications Of Standard Wiring Components
Electrical installation WARNING If the supply cord is damaged, it MUST be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. - Page 88 Electrical installation Component Model BS4A BS6A BS8A BS10A BS12A Interconnection Voltage 220-240 V wiring Wire size Only use harmonised wire providing double insulation and suitable for the applicable voltage. 2-core cable 0.75 mm²-1.5 mm² based on the current Recommended field fuse 6 A Residual current device Must comply with applicable legislation.
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Page 89: Guidelines When Connecting The Electrical Wiring
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 16.1.3 Guidelines when connecting the electrical wiring NOTICE... - Page 90 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...
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Page 91: To Connect The Electrical Wiring
Electrical installation Terminal Wiring Screw size Tightening torque (N•m) Earth screw Earth wiring 1.52~1.86 X2M~X5M Transmission wiring M3.5 0.79~0.97 External output 16.2 To connect the electrical wiring NOTICE ▪ Follow the wiring diagram (delivered with the unit, located at the inside of the service cover). - Page 92 Electrical installation In case of… connect… multiple indoor units connected to the terminals F1/F2 (Indoor unit X) on the the same branch BS unit to the F1/F2 terminals on the first indoor unit. Connect the F1/F2 terminals on the first indoor unit to the F1/F2 terminals on the second indoor unit, and so on.
- Page 93 Electrical installation 5 Attach the cables (power supply and interconnection cables) with a cable tie to the provided fixation points. Route the wiring according to the illustration below. BS4~12A BS10~12A BS6~12A BS4~12A BS4A : X3M BS6-8A : X3M BS6-8A : X4M BS10-12A : X4M BS10-12A : X5M a Power supply cable (field supply)
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Page 94: To Finish The Electrical Wiring
Electrical installation 16.3 To finish the electrical wiring After installing the interconnection wiring, wrap it along with the onsite refrigerant piping using finishing tape, as shown in the illustration below. a Liquid piping b Gas piping c High pressure / low pressure gas piping d Finishing tape e Interconnection cable (F1/F2) f Insulation... -
Page 95: To Connect The External Outputs
Electrical installation Setting for branch pipe ports to which NO indoor unit is connected DS1 (A1P) DS1 (A2P) DS1 (A3P) Target branch pipe port ON=NOT connected / OFF=connected (factory default) DS1 (A1P) Example When connecting an indoor unit to branch pipe ports A and B, but NOT connecting an indoor unit to branch pipe ports C and D. - Page 96 Electrical installation The FAN output must be used when a ventilated enclosure is required (see "13.3 To determine the required safety measures" [ 43]). a FAN output terminals (1 and 2) b Cable to extraction fan circuit Select and dimension the wiring in accordance with the applicable legislation based on the information in the notice below: NOTICE The FAN output has a limited capacity of 220~240 V AC –...
- Page 97 Electrical installation (SVS) EXAMPLE a SVS output terminal b Relay power supply c Relay d External alarm power supply e External alarm Cable routing Route the FAN or SVS output cable as indicated below. Leave ±20 cm additional length of cable to lower the switch box. BS4~12A a Power supply cable (field supply) b Output cable (FAN cable shown)(field supply)
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Page 98: Configuration
Configuration 17 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. 17.1 Making field settings 17.1.1 About making field settings To configure the BS unit, you MUST give input to the BS unit's main PCBs (A1P, A2P and A3P, depending on the unit). -
Page 99: To Access Mode 1 Or 2
Configuration BS2 BS3 BS1 MODE: for changing the set mode BS2 SET: for field setting BS3 RETURN: for field setting DS1, DS2 DIP switches a DIP switches b Push buttons c 7-segment displays Push buttons Use the push buttons to make the field settings. Operate the push buttons with an insulated stick (such as a closed ball-point pen) to avoid touching live parts. -
Page 100: To Use Mode 1
Configuration Turn on the power supply of the BS unit, outdoor unit and all indoor units. When the communication between BS units, indoor units and outdoor unit(s) is established and normal, the 7‑segment display indication state will be as below (default situation when shipped from factory). -
Page 101: To Use Mode 2
Configuration Example: Checking the content of parameter [1‑2] (to know the software version). [Mode-Setting]=Value in this case defined as: Mode=1; Setting=2; Value=the value we want to know/monitor: 1 Make sure the 7‑segment display indication is in the default situation (normal operation). -
Page 102: Mode 1: Monitoring Settings
Configuration 2 Push BS1 for more than five seconds. Result: Mode 2 is accessed: 3 Push BS2 seven times (or push BS2 until seven appears on the 7‑segment display). Result: Mode 2 setting 7 is addressed: 4 Push BS3 one time. The display shows the status of the setting (depending on the actual field situation). - Page 103 Configuration [2-2] Setting to define the cluster configuration the BS unit belongs to. This can be either a parallel or series cluster. This setting must be configured for all BS units in the same cluster, and has to be the same value. See "13.4.4 Ventilated enclosure" [ 50].
- Page 104 Configuration [2-6] Commissioning check 0 (default) Incomplete Completed Set ONLY on the LEFTMOST main PCB (A1P) of the BS unit. [2-7] Setting to enable or disable the ventilated enclosure safety measure of the BS unit. ▪ Choose value "1" if the ventilated enclosure is a necessary safety measure. ▪...
- Page 105 Configuration Main PCB Address value (e) BS12A BS8A BS4A [2-9] Setting to assign an address value to the BS unit for error handling. Assign the same address to the main PCBs (A1P, A2P and A3P) of 1 BS unit, and another address to the other BS units.
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Page 106: Mode 2: Default Field Settings
Configuration This setting is only to be used during the test run of the BS unit when a ventilated enclosure is used as a safety measure of the BS unit and an external alarm is added as an additional measure. During the BS unit test run, which is started by setting [2-3] to "1", the external fan and external alarm are both active. -
Page 107: 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 108: Bs Unit Test Run
Commissioning You have read the complete installation and operation instructions described in the installer and user reference guide. The BS unit is properly mounted. The field wiring has been carried out according to the instructions described in this document, according to the wiring diagram and according to the applicable national wiring legislation. -
Page 109: About Airflow Requirements
Commissioning ▪ Ventilated enclosure – multiple BS units to one extraction fan, parallel configuration: all BS units with a ventilated enclosure – parallel configuration. ▪ Ventilated enclosure – multiple BS units to one extraction fan, series configuration: only one BS unit with a ventilated enclosure – series configuration. -
Page 110: About Measuring The Airflow Rate
Commissioning Example A BS12A unit with an airflow rate during the test run of 115 m³/h. The pressure drop graph shows that this results in an internal pressure which is 42.9 Pa below the ambient pressure. Both requirements are met: ▪ The pressure inside the BS unit is more than 20 Pa below the ambient pressure (42.9 Pa). -
Page 111: Prerequisite Checklist
Commissioning a BS unit b Air outlet duct c Direction airflow d Hot wire probe anemometer 18.3.4 Prerequisite checklist Check the following items before starting the BS unit test run. You have read the complete installation and operation instructions described in the installer and user reference guide. -
Page 112: Troubleshooting During A Bs Unit Test Run
Commissioning 1 Change field setting [2‑3] to "1". This setting simulates a refrigerant leak and activates the safety measures according to the field settings that have been made. See "18.3.1 About the BS unit test run" [ 108] to check which units need a setting change. -
Page 113: System Test Run
Commissioning Symptom: The airflow rate is too low Possible causes Corrective action Incorrect field settings Check if all field settings are made correctly. When in parallel or series configuration, the field settings of all BS units in a cluster need to be made correctly. -
Page 114: Hand-Over To The User
Hand-over to the user 19 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 115: Maintenance And Service
Maintenance and service 20 Maintenance and service 20.1 Before the maintenance and service of the BS unit Before starting the maintenance and service, the following field setting must be applied on the outdoor unit in order to close the BS unit shut-off valves. [2‑45] BS unit shut-off valve setting. -
Page 116: Troubleshooting
Troubleshooting 21 Troubleshooting CAUTION "3 Specific installer safety instructions" [ 12] to make sure troubleshooting complies with all safety regulations. 21.1 Solving problems based on error codes If the BS unit runs into a problem, the user interface of the indoor unit(s) connected to the BS unit displays an error code. -
Page 117: Disposal
Disposal 22 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. BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit... -
Page 118: Technical Data
A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of the latest technical data is available on the Daikin Business Portal (authentication required). 23.1 Wiring diagram The wiring diagram is delivered with the unit, located at the inside of the service cover. - Page 119 Technical data Symbol Meaning AC*, CN*, E*, HA*, Connection, connector HE*, HL*, HN*, HR*, MR*_A, MR*_B, S*, U, V, W, X*A, K*R_*, NE D*, V*D Diode Diode bridge DIP switch Heater FU*, F*U, (for Fuse characteristics, see PCB inside your unit) Connector (frame ground) Harness H*P, LED*, V*L...
- Page 120 Technical data Symbol Meaning PTC* PTC thermistor Insulated gate bipolar transistor (IGBT) Circuit breaker Q*DI, KLM Earth leak circuit breaker Overload protector Thermo switch Residual current device Resistor Thermistor Receiver Limit switch Float switch S*NG Refrigerant leak detector S*NPH Pressure sensor (high) S*NPL Pressure sensor (low) S*PH, HPS*...
- Page 121 Technical data Symbol Meaning ZF, Z*F Noise filter Specific BS unit wiring diagram legend Symbol Meaning Electronic expansion valve (suction) Electronic expansion valve (HP/LP) EVSC Electronic expansion valve (subcool) EVSG Electronic expansion valve (gas shut-off valve) EVSL Electronic expansion valve (liquid shut- off valve) X15A Connector (drain up kit abnormal signal)
- Page 122 Technical data Model DS1, DS2 factory settings A1P, A2P BS12A To set the DIP switches (DS1~2) and push buttons (BS1~3), see the installation manual BS4~12A14AJV1B9 Installer and user reference guide VRV 5 branch selector unit 4P797566-1 – 2024.11...
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Page 123: 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 124 4P797566-1 2024.11...
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