Haier 2U50S2SM1FA-3, Installation Manual

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1.
In order to connect to 5kw indoor units, you need a pipe adapter,
the diameter size is shown on the drawing:
12.7
The values of The piping size are shown
in table 4
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 rst makes working easier.
The connection pipe is specialized for R32.
Half union
Flare nut Forced fastening without careful centering may
damage the threads and cause a leakage of gas.
Pipe Diameter( ) Fastening torque
Liquid side6.35mm(1/4")
18 20N.m
Liquid/Gas side9.52mm(3/8")
30 35N.m
Gas side 12.7mm(1/2")
35 45N.m
Spanner Torque wrench Gas side 15.88mm(5/8")
45 55N.m
Be careful that matters, such as wastes of sands,water,, etc. shall not enter the pipe.
CAUTION
The standard pipe length is Cm. If it is over D m, the function of the unit will be affected. If the pipe has
to be lengthened, the refrigerant should be charged, according to E 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
Indoor unit
Indoor unit
B1
B1
B1
A1 B2
Indoor unit
Outdoor unit
A1
Indoor unit
A2
A3
A2
Indoor unit
B2
Outdoor unit Outdoor unit
Indoor unit
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
Outdoor unit
B
Oil trap
Max. Length: B1 max =20m B2 max =20m
Indoor unit (B1+B2) max =30m
Min. Length: B1 min =3m B2 min =3m
In case the pipe total length (B1+B2) is more than
20m, the refrigerant should be charged, according
to 20 g/m.
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