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Installation of Outside Unit
4. Refrigerant Piping System
4.7 Series Unit Connection
Outdoor
Unit
Model
Number
ARCNN21
2 Unit
ⓒ
ARCNB21
Outdoor Unit
Master ≥ Slave
Master
ⓒ
ARCNN31
3 Unit
ⓑ
ARCNB31
Master ≥ Slave1 ≥ Slave2
Outdoor Unit
Master Slave1 Slave2
ⓑ
ⓒ
ARCNN41
4 Unit
ⓐ
ARCNB41
Master ≥ Slave1 ≥ Slave2 ≥ Slave3
Master Slave1 Slave2 Slave3
ⓐ
ⓑ
ⓒ
* Maximum number of connectable units could be different in accordance with model line up of target region.
* Install the branch pipe between units so that the outlet pipe is parallel to the surface.
When installing the branch pipe vertically between the outside units, the refrigerant can be uneven between the outside units, leading
to compressor burn and reduced capacity
ARCNN- (For Heat Pump) : Liquid pipe + Gas Pipe
ARCNB- (For Heat Recovery) : Liquid pipe + Low Pressure Gas Pipe + High Pressure Gas Pipe
Liquid pipe
Slave
Y branch should be installed horizontally
Low Pressure
Gas pipe
Oil Trap
13
Installation
High Pressure
Gas pipe
[Unit : mm(inch)]
Within +/- 10
Viewed from point A
in direction of arrow
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