Daikin ATM18MV2S Service Manual

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Daikin ATM18MV2S Service Manual Manual pdf 15 page image

Si041254EE Indoor Heat ExchangerRemoval Procedure 139. Indoor Heat ExchangerWarning Be sure to wait for 10 minutes or more after turning off all power supplies beforedisassembling work. In pump-down work, be sure to stop the compressor before disconnecting therefrigerant pipe. If the refrigerant pipe is disconnected with the compressor operatingand the stop valve open, air may be sucked in and may generate an over-pressure inrefrigeration cycle, thus resulting in pipe rupture or accidental injury. When removing or reinstalling the indoor heat exchanger, be sure to wear gloves orwrap the indoor heat exchanger with cloths. (You may be injured by the fins.)Caution Be sure to conduct pump down operation before disassembling the refrigerant pipe. If the refrigerant leaks, repair the spot of leaking, then collect all refrigerant from theunit. After conducting vacuum drying, recharge proper amount of refrigerant. From the viewpoint of global environmental protection, make sure to use a vacuumpump for air purging.Step Procedure Points1 Unscrew the flare nutfor gas piping and liquidpiping and disconnectboth pipes. Hold the indoor unit up with apiece of wood. Place a plastic sheet aroundthe drain pan to preventwetting the floor withremaining drain. If the drain hose isembedded in the wall,disconnect beforehand. Carry out the removal workswith 2 wrenches.2 Detach the indoor unitfrom the installationplate. When the pipings aredisconnected, protect theopenings of both the pipesand the indoor unit frommoisture intrusion.3 Unfasten the hook andremove the pipingfixture on the back ofthe indoor unit.Liquid pipingGas piping(R2796)(R2797)Pipingfixture (R23429)