Haier N Series Service Manual page 43

1.
14K 18K
2. Connection of pipes
To bend a pipe, give the roundness as large as possible not to crush the pipe ,
and the bending radius should be 30 to 40 mm or longer.
Connecting the pipe of gas side first makes working easier.
The connection pipe is specialized for R410A.
Half union
Spanner
Be careful that matters, such as wastes of sand s,water, , etc. shall not enter the pipe.
CAUTION:
Be careful that matters, such as wastes of sands, etc. shall not enter the pipe. The standard pipe
length of each indoor unit is 5m. If total pipe length is over 20m, the function of the unit will be
affected, charge more refrigerant is needed, according to 20 g/m. But the charge of refrigerant
must be conducted by professional air conditioner engineer. Before adding additional refrigerant,
perform air purging from the refrigerant pipes and indoor unit using a vacuum pump,then charge
additional refrigerant.
CAUTION
Outdoor unit
Outdoor unit
Flare nut
Torque wrench
Indoor unit
B1
A1
B2
Indoor unit
A2
Outdoor unit
Indoor unit
Oil trap
B
Indoor unit
Forced fastening without careful centering may
damage the threads and cause a leakage of gas.
Pipe Diameter(ǿ)
Liquid side6.35mm(1/4")
Liquid/Gas side9.52mm(3/8")
Gas side 12.7mm(1/2")
Gas side 15.88mm(5/8")
B1
Indoor unit
A1
A2
B2
Indoor unit
Max.Elevation: A1 max =15m A2 max =15m
A3 max =15m
In case the elevation B is more than 5m,
oil trap shoud be installed every 5~7m
Max. Length: B1 max =20m B2 max =20m
(B1+B2) max =30m
In case the pipe total length (B1+B2) is more than
20m, the refrigerant should be charged, according
to 20 g/m.
Fastening torque
18N.m
42 N.m
55N.m
60 N.m
Indoor unit
B1
Outdoor unit
A3
Indoor unit
B2
Domestic air conditioner
Installations