Electric Wiring - Haier AU282AHBEA Service Manual

Indoor
Completely tightened
Completely tightened
Indoor units
It shall use the vacuum pump of (lower than -755mmHg)high vacuum degree and large air
discharging (over 40l/min).
The vacuumizing time depends on the length of the connecting pipe, generally is 1~2 hours.
When vacuumizing, it shall be confirmed both gas and liquid side valves are closed.
If after 2 hours vacuumizing, it cannot reach the vacuum degree below -755mmHg, it can be
vacuumized for other 1 hour.
If after 3 hours vacuumizing, it still cannot reach the vacuum degree below -755mmHg, check
if there is any leaking point and repair the them.
If after over 2 hours vacuumizing, the vacuum degree is below -755mmHg, close the V L and V H on
the meter separator and stop vacuumizing. 1 hour later to confirm if the vacuum degree changes. If
changes,it indicates there is leaking point in the system. Check the leaking point and repair.
After finishing the above vacuumizing, change the vacuum pump into refrigerant pump to charge the
refrigerant.
Charging amount of refrigerant
When the total length (L) of the two indoor units' connecting pipe is less than 5m, it is unnecessary
to charge additional refrigerant.
If the connecting pipe (L) exceeds 5m, it shall charge Mg additional refrigerant per meter.
That is: Refrigerant charging amount = (L-5) x M (g)
For the unit with liquid pipe 6.35mm, M=30
For the unit with liquid pipe 9.52mm, M=65
Only in COOLING operation can charge the additional refrigerant.
When charging, the refrigerant shall be charged from the charging nozzle of low pressure vavle.
Be carefull when charging refrigerant, do not let the air mix into the system,and must charge
the additional refrigerant in liquid condition.

Electric wiring

DANGER OF BODILY INJURY OR DEATH
TURN OFF ELECTRIC POWER AT CIRCUIT BREAKER OR POWER SOURCE BEFORE MAKING ANY
ELECTRIC CONNECTIONS.GROUND CONNECTIONS MUST BE COMPLETED BEFORE MAKING
LINE VOLTAGE CONNECTIONS.
3-way valve totally closed
(Gas side)
Outdoor
Flare part
Flare part
2-way valve totally closed
(Liquid side)
WARNING
-187-
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Low pressure gauge
V L VH
Discharging valve
P
Vacuum pump
Outdoor units
High pressure gauge
Meter separator