Installation Of Outdoor Unit; Connection Of Pipes - Haier 2HUM18HA03/R2 - annexe 1 Installation Manual

1.Installation of Outdoor Unit

Drawing for the installation of indoor and outdoor units
Install according to

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 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.
For the 1by 2 models which outdoor unit capacity is 18000 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.
Indoor unit
B1
A1
B2
Indoor unit
A2
Outdoor unit
CAUTION
Max.Elevation: A1
=15m A2
max
A3 =15m
max
In case the elevation A is more than 5m,
oil trap shoud be installed every 5~7m
3.Connection
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.
Insert the cable according to terminal number in the same manner as the indoor unit.
If wiring is not correct, proper operation can not be carried out and controller may be damaged.
Fix the cable with a clamp.
4.Attaching Drain-Elbow
If the drain-elbow is used, please attach it as
figure. (Note: Only for heat pump unit.)
Outdoor unit
Flare nut
Torque wrench
B1
Indoor unit
A1
A2
B2
Indoor unit
Outdoor unit
=15m
max
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")
Gas side 12.7mm(1/2")
Indoor unit
B1
Outdoor unit
A3
Indoor unit
B2
In case A is more than 5m
Max. Length: B1 =20m B2
max
B1 +B2
max max
In case the pipe length B is more than 20m,
the refrigerant should be charged, according to 20 g/m.
6
Fastening torque
18N.m
40N.m
55N.m
of single indoor unit is
Outdoor unit
Oil trap
B
Indoor unit
A
=20m
max
=35m