Hokkaido HKEN-HCNN 642XR, Service Manual

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Outdoor unit
1.Installation of Outdoor Unit
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.
The max ver tical distance between the indoor unit and the outdoor unit is 10 m.
Drawing for the installation of indoor and outdoor units
Half union
Flare nut
Forced fastening without careful
centering may damage the
threads and cause a leakage of
gas.
Pipe Diameter
Fastening torque
Spanner
Torque wrench
Liquid side 6.35mm(1/4") 18N.m
Gas side 12.7mm(1/2")
55N.m
Be careful that matters, such as wastes of sands, etc. shall not enter the pipe.
The standard pipe length is 5m. If it is over 5m, 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.
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.
Drain hose
Drain elbow
The max length of connection pipe of HKEN-HCNN 642 XR model is 15m.
Classic Line Air Conditioner
Model: HKEN-HCNN 642 XR