Haier 2HUM14HA03/R2 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 10m. If it is over 20m, 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
CAUTION
In case the elevation A 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 length B is more than 20m,
the refrigerant should be charged, according to 20 g/m.
In case A is more than 5m
A
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
max
+B2
max
=30m
Outdoor unit
Indoor unit
A1
B1
Indoor unit
A2
B2
For the 1by 2 models which outdoor unit capacity is 14000 BTU , the standard pipe length
5 meters, double units is 10 meters. If total pipe length is more than 20 metres, charge more refrigerant is needed.
of single indoor unit is