Haier 1U71S2SG1FA Service Manual page 193

9.On Drainage
• Please install the drain hose so as to be downward slope without fail. Please don't do the drainage as shown
below.
• Please pour water in the drain pan of the indoor unit, and confirm that drainage is carried out thoroughly to
outdoor.
• In case that the attached drain hose is in a room, please apply heat insulation to it without fail.
WARNING
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would educe the lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with the
unit.
4) Do never install a drier to this R32 unit in order to guarantee its lifetime. The drying material may dissolve and
damage the system.
5) Incompete flaring may cause refrigerant gas leakage.
Pump down operation
In order to protect the environment, be sure to pump down
when relocating or disposing of the unit.
1) Remove the valve caps from liquid stop valve and gas stop
valve.
2) Carry out forced cooling operation.
3) After five to ten minutes close the liquid stop valve with a
hexagonal wrench.
4) After two to three minutes close the gas stop vaile and stop
forced cooling operation.
Wiring Work
1. Electric Wiring
• The air conditioner must use special circuit, and wiring by the qualified electrician according to the wiring rules
specified in national standard.
• The grounding wire and the neutral wire shall be strictly separated. Connect the neutral wire with grounding wire
is incorrect.
• The explosion-proof electric leakage breaker must be installed.
• All the electric wire must be copper wire.Power supply: 1PH, 220-240V-, 50/60Hz.
• The wiring method of power line is Y connection. If the power line is damaged, in order to avoid risk of electric
shock, it must be replaced by the manufacturer or its repair center or other similar qualified person.The connecting
cable must be shielded. Fuse:T25A 250VAC(Power circuit board).
• Please check the circuit diagram about the fuse replaced, explosion-proof fuse. The specification of power cable
2
is H05RN-F3G 4.0mm .
2
• The specification of cable between indoor unit to outdoor unit is H05RN-F4G 2.5mm .
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