Haier AU84NBTBAA User Manual page 13

Installation of outdoor unit
Use vacuum pump to discharge the water and air out.
(1)Remove the valve caps of 2-way valve and 3-way
valve of outdoor unit.
(2)Open the charging valve cap of the 3-way valve,
then connect the pipe according to the right Figure
shown.
(3)Close the ìHiî switch tight, open ìLoî switch, and
operate the vacuum pump. The operation time
depends on the performance of the pump and the
length of the pipe. The required vacuum degree
is below 200Pa.
(4)After reaching the vacuumizing operation time,
turn off the ìLoî switch of the compound pressure
meter, then turn off the vacuum pump.
(5)Open the valve core of the 2-way valve and 3-way
valve, that is turn the valve core anti-clockwise
till the end, thus the refrigerant in indoor unit and
outdoor unit is joined together.
(6)Then fasten the valve caps and the air charging
valve cap.
Leakage detection
Before performing total wrapping and arrangement, please perform leakage
detection first.
Can use Halogen leakage detector to check.
Can also use soap water to perform detection: daub soap water on every
joint, if there is leakage, air bubble will appear.
Note: When using soap water, it must use 30kg/cm Nitrogen tank to pass
through the pipe for checking. After checking, then perform vacuumizing.
Refrigerant charging amount
When the connection pipe (L) is less than or equal to 5m, it is not necessary
to charge additional refrigerant. If the connection pipe (L) exceeds 5m, it needs
to be added with 60g refrigerant every meter.
That is: refrigerant charging amount = (L-5)x60(g)
Only in COOLING operation mode can charge the additional refrigerant.
When charging, the refrigerant should be charged through the charging
nozzle of the low pressure valve.
When charging the refrigerant, please be careful not to let air mix into
the system.
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Compound pressure meter
Vacuum pump
2-way valve
Liquid pipe
Gas pipe
3-way valve