Haier AU042FPERA Service Manual page 19

• Execute earthing for the unit. But the earthing wire can not be connected to the gas pipe, water pipe, lightening
rod or the telephone earthing wire. Improper earthing will cause electric shock.
• Don't install the unit at the place where leaks the flammable gas. Or it will cause fire.
• Execute the water drainage pipe according to the manual, improper installation will cause water leakage to wet
the family things.
• The outdoor fan can not face to the flower or the other vegetable, or the blowing gas will make the flower dried
up.
• Please ensure the maintenance room, if not, it will cause the maintenance person damaged.
• When installing the unit on the roof or the other high place, to prevent the person falling down, please set the
fixed ladder and the railing at the passage.
• Use the two-end spanner, and fasten the nut at proper torque. Don't fasten the nut excessively against the flared
section broken. Or it will cause refrigerant leakage and lack of oxygen.
• Take measures for heat insulation to the refrigerant pipe, or there will be water leakage or dew drop to wet the
family things.
• After finishing the refrigerant pipe, make leakage test by charging the nitrogen. In case the refrigerant leaks in a
small room and exceeds the limited concentration, it will cause lack of oxygen.
• Don't use the other refrigerant except for R410A. The R410A pressure is 1.6 times higher than R22 pressure. The
refrigerant R410A tank is marked with pink sign.
• Against charging different refrigerant, we changed the stop valve diameter of the R410A unit. To enhance
the compression consistence, we also changed the flared pipe dimension. Prepare the R410A specially tools
according to the below table.
R-410A specified tools
1 Gauge manifold
2 Charge hose
3 Electronic balance for charging R410A
4 Torque spanner
5 Flare tool
6 Copper pipe gauge for adjusting projecting margin
7 Vacuum pump adapter
8 Leakage detector
• When charging refrigerant, the refrigerant must be taken out as liquid state from the tank.
CAUTION
Remarks
Range: HP>4.5MPa, LP>2MPa
Pressure: HP: 5.3MPa, LP: 3.5MPa
Can not use the measurable charging tank
Must be with reverse stop valve
Can not use freon leakage detector, but the He detector
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