Vacuum Pumping; Leakage Detection - Mirage IAEH121A Owner's Manual

Installation of outdoor unit
The 18K 24K UNIT drainage hole consists of two Φ25 and two kidney holes
(see the fig.1). The drain plug consists of one Φ25 and two kidney plugs.
(The figures in this manual may be different with the material objects, please refer to the material objects for reference)

Vacuum pumping

Use vacuum pump
1. Remove the valve caps on the
liquid valve and gas valve and the
nut of refrigerant charging port.
2. Connect Vacuum meter to suction
port (by T-fitting), next connect
charging hose to vacuum meter and
finally service hose to the vacuum
pump.
3. Open manifold completely and pull a proper vacuum until get 300 microns
on reading. (Note: Removing core or using 3/8'' hoses is useful to save time)
4. Close manifold and turn vacuum pump OFF to check if pressure keeps
stable. If not you must look for leakage, fix and try again.
5. If vacuum level is stable, use an Allen wrench to open gas and liquid
valves completely to let refrigerant fill the system up.
6. Put valves cap back and do the same with nut of suction port once you
have removed manifold.

Leakage detection

1. With leakage detector: Check if there is leakage with leakage detector.
2. With soap water: If leakage detector is not available, please use soap
water for leakage detection. Apply soap water at the suspected position and
keep the soap water for more than 3min. If there are air bubbles coming out
of this position, there's a leakage.
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