Haier AU482FIERA Installation & Maintenance Instructions Manual

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Haier AU482FIERA Installation & Maintenance Instructions Manual Manual pdf 27 page image

258.7 EvacuationEvacuate at the check valve of liquid stop valve and both sides of the gas stop valve.Operation procedure:After reaching -100.7KPa orless (below -755mmHg), letthe vacuum pump runningcontinuously for over 1hour.Leakage test passedEvacuation beginsEvacuation endsCheck vacuumCharge refrigerantLeave it for over 1hour, vacuum pointerdoes not arise.If vacuum pointer arises, it shows there is water or leakage in the system,please check and modify it, and then evacuate again.Because the unit is with refrigerant R410A, the below issues should be paid attention:■ To prevent the different oil into the pipe, please use the special tool for R410A, especially for gauge manifold andcharging hose.■ To prevent the compressor oil into the refrigerant cycle, please use the anti-counter-flow adapter.Check valve operationOpen/close method:■ Take down the valve cap.■ Turn the liquid stop valve and the gas stop valve with hexangular spanner until it stops. If opening the valvestrongly, the valve will be damaged.■ Tighten the valve cap.Tighten torque as the table below:Stop valve dimension Tighten torque N·m (clockwise rotation is close)Shaft (valve body) Cap (cover) (Check joint)φ9.52 5~6 13~168~10φ15.88 8~9 20~25φ19.05 8~9 22~27