Daikin VRV-WIII Installation Manual

Contents

English 8• The wiring to the indoor units must be connected to the F1/F2(To IN/D UNIT) terminals on the PC board in the outside unit.Field line connection: Power supply wiring and transmissionwiringMake sure to connect the power wire to the power terminal block andfix it using attached clamp as shown in figure 15 and 19.(Refer to figure 15)1. Power supply(3N~, 380-415V)2. Branch switch, overcurrent breaker3. Grounding wire4. Earth leakage breaker5. Attach insulation sleeves.6. Power supply terminal block7. Grounding terminal8. Retain the ground wires along with the power wires usingthe accessory clamp (A).9. Grounding wire10. When wiring, do not allow the ground wires to contactthe compressor lead wires. If the wires contact eachother, adverse effects may occur to other units.11. When connecting two wires to one terminal, ensure thatthe crimp-style terminals face with each other back toback.Moreover, make sure that the wire of the smaller gaugeis located above.12. Terminal block13. Crimp-style terminal14. Wire gauge: Small15. Wire gauge: Large(Refer to figure 19)1. Intake for power supply wiring, pump operation output(high voltage) and ground wiring.2. Intake for power supply jumper wiring and ground jumperwiring. (Only for jumping the powrer supply.)3. HP/LP shutoff valve (high temperature part)4. Retain the power supply wiring, pump operation output(high voltage) and ground wiring with the accessoryclamp(A).5. Insert the accessory clamp (B) in the hole of the fixingplate for stop valve.6. Power supply wiring, pump operation output (high volt-age) and ground wiring.7. Approximately 50mm8. Power supply jumper wiring and ground jumper wiring.9. Retain the power supply wiring, pump operation output(high voltage) and ground wiring with the accessoryclamp (B) to prevent them from touching with the stopvalve for discharge gas.10. Use the through hole cover for power jumper supply bycutting the hatched area.11. Hatched area12. Insert the accessory clamp (B) in the hole of the bottomof electrical box.13. Intake for transmission wiring. (low voltage)14. Make sure to provide for a downward loop in the trans-mission wiring right in front of the location where the wir-ing is to be fixed over the topplate of the switch box. Thisin order to prevent that condensate drips off the wiringinto the switch box.15. Fix the transmission wiring to resin clamps with theaccessory clamps (A)16. Pass the transmission wiring (low voltage) through thewire clip.17. Retain the power supply wiring, pump operation output(high voltage) and ground wiring to the bottom of electri-cal box with the accessory clamp (B)18. Do not bundle the power supply jumper wiring.Caution〈Precautions when laying power wiring〉Use crimp-style terminals for connections to the power terminal block.When none are available, follow the instructions below.• Do not connect wiring of different size to the power terminalblock. (Slack in the power wiring may cause abnormal heat.)• When connecting wiring which is the same thickness, do asshown in the figure below.• For wiring, use the designated power wire and connect firmly,then secure to prevent outside pressure being exerted on theterminal board.• Use an appropriate screwdriver for tightening the terminalscrews. A screwdriver with a small head will strip the head andmake proper tightening impossible.• Over-tightening the terminal screws may break them.• See the table below for tightening torque for the terminalscrews.〈Precautions when connecting the ground〉When pulling the ground wire out, wire it so that it comes throughthe cut out section of the cup washer. (An improper ground con-nection may prevent a good ground from being achieved.)8-5 In case of a local settingIf necessary, do the local settings as mentioned in the table below.For setting, refer to the plate “Cares to be taken in servicing” attachedto the cover of electrical box.Typical local settings∗For other settings than mentioned in the table below, refer to theequipment design materials and service manual.CautionA separate adapter (sold separately as an accessory) for exter-nal control of an outside unit becomes necessary when doing ademand operation from an external instruction, setting of cool-ing and heating through a centralized remote controller for cool-ing and heating (sold separately as an accessory) and setting ofcentralized interlock. For details, refer to the manual attached tothe adapter.Power wireCrimp-style terminalTightening torque(N · m)M5 (Power terminal block) 2.0-3.0M5 (Ground) 3.2-3.9M3.5 (transmission wiring terminal block) 0.8-0.97(1)Setting of switching betweencooling and heatingThis setting is done when switching between cooling andheating is performed by a switching remote controller (soldseparately as an accessory) installed on the outside unit.(2)Setting to prohibitsequenced start This setting is done when the outside units are not startedin a sequenced order.(3)Setting of centralized inter-lock Setting of externaldemandThese settings are done when the interlocks are connectedin a lump-sum manner or when performing a demand oper-ation by external instruction.(4)Setting of abnormal displaywhen interlock contact isOFFThis setting is done when making an abnormal display (HJ)on a remote controller when the interlock contact is OFF(when the heat source water pump is not operated).Connect same-size wiringto both sides.It is forbidden toconnect two toone side.It is forbidden toconnect wiring ofdifferent size.Crimp-style terminalCup washerCut out section