2
2. Selecting the Correct Size Refrigerant Pipes and Using the Twinning Kit
(1) Pipe size
1
Field-supply the pipes to be connected to the kit.
2
Select the correct size pipe referring to the outline diagram of
the unit model in use or the Databook.
3
If the pipe was cut with a pipe cutter, remove the burrs and
eliminate foreign materials before connecting.
* On the low-pressure side, the twinning kit connects to the field-
supplied pipes inside the outdoor unit.
The distributor on the low-pressure side must be placed in the
outdoor unit that has a larger capacity index of the two, regardless
of the relative positions of the outdoor units or their addresses.
If the distributor is placed in the outdoor unit that has a smaller
capacity, refrigerant will not be properly distributed and compressor
failure may result.
(If outdoor units that have the same capacity are used in
combination, the distributor can be placed in either outdoor unit.)
(2) Before installing low-pressure twinning kit
Outdoor unit 1
Outdoor unit 2
To BC controller
To BC controller
Twinning pipe (high pressure)
1. Confirming the Package Contents
The following items are included with the Twinning Kit (CMY-ER100CBK). Verify that all items are present before starting installation.
* Always use the twinning pipes included in the kit when preparing the twinning kit.
If the field-supplied pipes do not fit the parts in the kit, use the accessory piping parts listed below.
(1) Package contents
Model
1
Low-pressure
twinning kit
2
High-pressure
twinning pipe
3
Fixing screw
4
Elbow pipe
ø22.2 [7/8]
5
Elbow pipe
ø28.58 [1-1/8]
6
High-pressure
pipe (for routing
through the bottom)
7
High-pressure
pipe (for routing
through the front)
8
Pipe cover
9
OD22.2 [7/8]
-ID19.05 [3/4]
0
OD19.05 [3/4]
-ID22.2 [7/8]
CMY-ER100CBK
1
1
1
1
1
1
1
1
1
1
Model
a
OD15.88 [5/8]
-ID19.05 [3/4]
b
OD19.05 [3/4]
-ID15.88 [5/8]
c
Installation
Manual
(this booklet)
d
Insulation
cover
e
Cable tie
f
Buffer
g
Saddle
h
Fixing plate
i
Packing
CMY-ER100CBK
1
3
1
1
2
1
1
1
1
(2) List of field-supplied parts
· Refrigerant pipes other than the ones provided in the kit.
· Heat-resistant insulation material (for field-supplied refrigerant pipes)
· Insulation cover tape
Twinning Kit (low pressure)
See reverse.
Attach buffer
f
to the side of the
compressor cover, keeping the low-pressure
twinning kit
1
out of contact with the cover.
Attach the buffer in the correct position
along the bottom of the compressor cover
and the edge of the rubber bush.
