Daikin REYQ8PY1B Installation Manual

Also see for VRV III REYQ10PY1B: Operation manual Service manual

Contents

Daikin REYQ8PY1B Installation Manual Manual pdf 18 page image

English 1210. CHECKING OF DEVICE AND INSTAL-LATION CONDITIONSBe sure to check the followings.For those doing electrical work1. Make sure there is no faulty transmission wiring or loosing of a nut.See “7-4 Transmission Wiring Connection Procedure”.2. Make sure there is no faulty power wiring or loosing of a nut.See “7-5 Power Wiring Connection Procedure”.3. Has the insulation of the main power circuit deteriorated?Measure the insulation and check the insulation is above regularvalue in accordance with relevant local and national regulations.For those doing pipe work1. Make sure piping size is correct.See “6-1 Selection of piping material and Refrigerant branch-ing kit”.2. Make sure insulation work is done.See “9. PIPE INSULATION”.3. Make sure there is no faulty refrigerant piping.See “6. REFRIGERANT PIPING”.11. ADDITIONAL REFRIGERANTCHARGE AND CHECK OPERATIONThe outdoor unit is charged with refrigerant when shipped from the factory,but depending on the size and length of the piping when installed, it mayrequire additional charging.For charging the additional refrigerant, follow the procedure in this chapter.And then carry out the check operation.11-1 Before working[About the refrigerant tank]Check whether the tank has a siphon pipe before charging and placethe tank so that the refrigerant is charged in liquid form.(See the figure below.)Note• Always use the proper refrigerant (R410A). If charged with therefrigerant containing an improper material, it may cause anexplosion or accident.• R410A is a mixed refrigerant, so charging it as a gas will causethe refrigerant composition to change, which may prevent normaloperation.[Shutoff valve operation procedure]When operating the shutoff valve, follow the procedure instructed below.Note• Do not open the shutoff valve until “10. CHECKING OF DEVICEAND INSTALLATION CONDITIONS” are completed. If the shutoffvalve is left open without turning on the power, it may cause refrig-erant to buildup in the compressor, leading insulation degradation.• Be sure to use the correct tools.The shutoff valve is not a back-seat type. If forced it to open, itmight break the valve body.• When using a service port, use the charge hose.• After tightening the cap, make sure no refrigerant gas is leaking.Tightening torqueThe sizes of the shutoff valves on each model and the tighteningtorque for each size are listed in the table below.(Refer to figure 28)1. Service port2. Cap3. Hex holes4. Shaft (valve body)5. Seal sectionTo open1. Remove the cap and turn the shaft counterclockwise with thehexagon wrench (JISB4648).2. Turn it until the shaft stops.3. Make sure to tighten the cap securely.(For the tightening torque, refer to the item .)To close1. Remove the cap and turn the shaft clockwise with the hexagonwrench (JISB4648).2. Securely tighten the valve until the shaft contacts the main body seal.3. Make sure to tighten the cap securely.(For the tightening torque, refer to the item .)With siphon pipeOther tanksStand the tank upright and charge.(The siphon pipe goes all the way inside,so the tank does not need be putupside-down charge in liquid form.)Stand the tank upside-down and charge.8HP type 10HP type 12HP type 14HP type 16HP typeLiquid pipeshutoff valveφ9.5φ12.7The 12HP type corresponds tothe 12.7-diameter onsite pip-ing using the accessory pipe.Suction gasshutoff valveφ25.4The 8HP type corresponds to the 19.1-diameteronsite piping using the accessory pipe.The 10HP type corresponds to the 22.2-diameteronsite piping using the accessory pipe.The 12-16 HP type corresponds to the 28.6-diam-eter onsite piping using the accessory pipe.HP/LP gasshutoff valveφ19.1The 8HP type corresponds to the 15.9-diameteronsite piping using the accessory pipe.The 14 · 16 HP type corresponds to the 22.2-diam-eter onsite piping using the accessory pipe.Shutoffvalve sizeTightening torque N·m (Turn clockwise to close)Shaft (valve body) Cap (valve lid) Service portφ 9.5 5.4 - 6.6 Hexagonalwrench4 mm13.5 - 16.511.5 - 13.9φ 12.7 8.1 - 9.9 18.0 - 22.0φ 19.127.0 - 33.0Hexagonalwrench8 mm22.5 - 27.5φ 25.4