Haier 3HUM20HA03/R2(DB) Installation Manual - 3.Connection
Outdoor unit
Forced fastening without careful centering
may damage the threads and cause a
leakage of gas.
Pipe Diameter ( )
Liquid side 6.35mm(1/4")
Gas side 9.52mm(3/8")
Fastening torque
18N.m
40N.m
Gas side 12.7mm(1/2")
55N.m
1.Installation of Outdoor Unit
3.Connection
4.Attaching Drain-Elbow
2.Connection of pipes
Install according to
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.
Be careful that matters, such as wastes of sands, etc. shall not enter the pipe.
The standard pipe length is
15m. If it is over 30m, the function of the unit will be affected. If the pipe has
to be lengthened, the refrigerant should be charged, 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.
Use the same method on indoor unit. Loosen the screws on terminal block and insert the plugs fully into
terminal block, then tighten the screws.
If wiring is not correct, proper operation can not be carried out and controller may be damaged.
If the drain-elbow is used, please attach it as
figure. (Note: Only for heat pump unit.)
Drawing for the installation of indoor and outdoor units
Insert the cable according to terminal number in the same manner as the indoor unit.
Fix the cable with a clamp.
Half union
Flare nut
Spanner
Torque wrench
6
For the 1by 3 models which outdoor unit capacity is 20000 BTU , the standard pipe length
is 5 meters, triple units is 15 meters. If total pipe length is more than 30 metres, charge more refrigerant is needed.
of single indoor unit
CAUTION
In case more than 5m
Oil trap shoud be installed every 5~7m
Max. Length:A=45m
Max.Elevation:15m
no more gas if the length of connecting pipe is less than30m
The height difference between any two indoor or outdoor units
can not be more than 15 metres
The length ofconnecting pipe of one units must less than 20 metres
A
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Oil trap