Haier Z/N-Series, Service Manual

Page: 44 / 84

14K 18K
1.
To bend a pipe, give the roundness as large as possible not to crush the pipe ,
ƽ
and the bending radius should be 30 to 40 mm or longer.
Connecting the pipe of gas side fi rst makes working easier.
ƽ
The connection pipe is specialized for R410A.
ƽ
Half union
Flare nut
Torque wrench
CAUTION:
Be careful that matters, such as wastes of sands,water,, etc. shall not enter the pipe.
Spanner
Forced fastening without careful centering may
damage the threads and cause a leakage of gas.
Pipe Diameter( ǿ ) Fastening torque
Liquid side6.35mm(1/4") 18N.m
Liquid/Gas side9.52mm(3/8") 42 N.m
Gas side 12.7mm(1/2") 55N.m
Gas side 15.88mm(5/8") 60 N.m
Connection of pipes 2.
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
Max.Elevation: A1 max =15m A2 max =15m
In case the pipe total length (B1+B2) is more than
20m, the refrigerant should be charged, according
to 20 g/m.
B
Outdoor unit
Indoor unit
A1
B1
Indoor unit
A2
B2
Outdoor unit
Indoor unit
B1
Indoor unit
B2
Outdoor unit
Indoor unit
Oil trap
A3
A3 max =15m
(B1+B2) max =30m
Outdoor unit
Indoor unit
A1
B1
Indoor unit
A2
B2
CAUTION
Indoor unit
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.
Installations
Domestic air conditioner
42