Daikin FHC20JEVLK Installation Manual

Contents

Daikin FHC20JEVLK Installation Manual Manual pdf 20 page image

1-18VACUUMING AND CHARGINGVacuuming is necessary to eliminate all moisture and air from the system. The series II Outdoor Unit is provided with flarevalve fittings.Vacuuming The Piping And The Indoor UnitExcept for the outdoor unit which is pre-charged with refrigerant,the indoor unit and the refrigerant connection pipes must be air-purged because the air containing moisture that remains in therefrigerant cycle may cause malfunction of the compressor.Remove the caps from the valve and the service port.Connect the center of the charging gauge to the vacuumpump.Connect the charging gauge to the service port of the 3-wayvalve.Start the vacuum pump. Evacuate for approximately 30minutes. The evacuation time varies with different vacuumpump capacity. Confirm that the charging gauge needle hasmoved towards -760mmHg.CautionIf the gauge needle does not move to -760mmHg, be sure tocheck for gas leaks (using the refrigerant detector) at flare typeconnection of the indoor and outdoor unit and repair the leakbefore proceeding to the next step.Close the valve of the changing gauge and stop the vacuumpump.On the outdoor unit, open the suction valve (3 way) and liquidvalve (2 way) (in anti-clockwise direction) with 4mm key forhexagon sacked screw.Charge OperationThis operation must be done by using a gas cylinder and a preciseweighing machine. The additional charge is topped-up into theoutdoor unit using the suction valve via the service port.Remove the service port cap.Connect the low pressure side of the charging gauge to thesuction service port center of the cylinder tank and close thehigh pressure side of the gauge. Purge the air from the servicehose.Start the air conditioner unit.Open the gas cylinder and low pressure charging valve.When the required refrigerant quantity is pumped into the unit,close the low pressure side and the gas cylinder valve.Disconnect the service hose from service port. Put back theservice port cap.•••••••••••••Refrigerant PipingOutdoor Unit 3 Ways ValveAllen keyService PortFlare nutHIGH PRESSURE GAUGEGAUGE MANIFOLDLOW PRESSURE GAUGEHANDLE HI (ALWAYS CLOSED)CHARGE HOSE-760mmHgHANDLE LOCHARGE HOSE VACUUM PUMPADAPTER FORCOUNTER FLOWPREVENTIONLIQUID VALVEGAS VALVE(3-WAY)CHECK VALVECONFIGURATION OF AIRPURGE BY CHARGINGHIGH PRESSURE GAUGELOW PRESSURE GAUGEGAUGE MANIFOLD-760mmHgHANDLE LO HANDLE HI (ALWAYS CLOSED)CHARGE HOSECHARGE HOSELIQUID VALVEGAS VALVE(3-WAY)CHECK VALVECONFIGURATION OF AIRPURGE BY CHARGING