Installing Bc Controller; Checking The Accessories With Bc Controller; Installing Bc Controllers; Connecting Refrigerant Pipes And Drain Pipes - Mitsubishi Electric CITY MULTI CMB-P-V-J Manuel D'installation

3. Installing BC controller

3.1. Checking the accessories with BC con-
troller
The following items are supplied with each BC controller.
CMB-
P104V-J
P106V-J
P108V-J
P1012V-J
P1016V-J
Item
① Drain hose 1
② Tie band 3
Washer for 2 kinds
③
construction (4 each)

3.2. Installing BC controllers

Installing hanging bolts
Install locally procured hanging bolts (threaded rod) following the procedure
given in the figure. The hanging bolt size is ø10 (M10 screw).
To hang the unit, use a lifting machine to lift and pass it through the hanging bolts.

4. Connecting refrigerant pipes and drain pipes

4.1. Connecting refrigerant pipes

1. Connect the liquid and gas pipes of each indoor unit to the same (correct)
end connection numbers as indicated on the indoor unit connection section
of each BC controller. If connected to wrong end connection numbers, there
will be no normal operation.
2. List indoor unit model names in the name plate on the BC controller control
box (for identification purposes), and BC controller end connection numbers
and address numbers in the name plate on the indoor unit side.
3. If the number of ports is greater than the number of indoor units to be
connected, use any ports.
Seal unused end connections using cover caps just as they were capped
when shipped from the factory. Not replacing on end cap will lead to
refrigerant leak-age.
4. When using CMY-Y102S-G2, CMY-Y102L-G2, CMY-Y202S-G2, CMY-
R201S-G, CMY-R202S-G, CMY-R203S-G, CMY-R204S-G, or CMY-R205S-
G, connect it horizontally.
5. Be sure to have pipe expansion of indoor unit connecting port by cutting the
piping at the cutting point which depends on the indoor unit capacity.
6. Restriction on installing the 2-Branch Joint Pipe CMY-R101/102S-G on the
low-pressure piping
To sub BC controller
A
To outdoor unit
- Regarding the 2-Branch Joint Pipe on the low-pressure piping, A and B
must be installed horizontally, and C must be installed upward higher than
the horizontal plane of A and B.
7. Restriction on installing the 2-Branch Joint Pipe CMY-R201/202/203/204/
205S-G on the high-pressure piping, low-pressure piping, and liquid piping.
To sub BC controller
A
To main BC controller
- Regarding the 2-Branch Joint Pipe on the high-pressure/low-pressure/liquid
piping, A and B must be installed horizontally, and C must be installed
upward higher than the horizontal plane of A and B.
Model name
CMB- CMB- CMB-
P108V-JA P1016V-KA P104V-KB
P1012V-JA
P1016V-JA
Qty
1 1 1
3 3 3
2 kinds 2 kinds 2 kinds
(4 each) (4 each) (4 each)
C
B
To main BC controller
C
B
To sub BC controller
[Fig. 3.2.1] (P.4)
Ⓐ Nut (not supplied)
Ⓑ Double nut (not supplied)
Ⓒ Hanging bolt ø10 (M10 screw) (not supplied)
Ⓓ Washer (with cushion) (supplied)
* Attach the cushion facing down.
Ⓔ Minimum 30 mm
Ⓕ Washer (without cushion) (supplied)
► Be sure to install the BC controller horizontally, using a level. If the
controller is installed at an angle, drain water may leak out. If the
controller is slanted, loosen the fixing nuts on the hanging brackets to
adjust its position.
► Provide a downward pitch of 1.5º or below to the BC controller.
► Do not place the BC controller directly on the floor because the drain
pan needs to be installed in a tilted position.
[Fig. 3.2.2] (P.4)
Ⓐ Within 1.5º
Ⓑ Drain socket
Ⓒ Viewed from the front of the control box
Caution:
Be sure to install the unit horizontally.
Note:
Remove burr after cutting the piping to prevent entering the piping.
Check that there is no crack at the pipe expansion part.
[Fig. 4.1.1] (P.4)
Ⓐ Indoor unit connecting port
Ⓑ Cutting point : ø9.52 (Liquid side) or ø15.88 (Gas side)
(Indoor unit model : above P50)
Ⓒ Cutting point : ø6.35 (Liquid side) or ø12.7 (Gas side)
(Indoor unit model : P50 or below)
Ⓓ Cut the piping at the cutting point
Ⓔ Have pipe expansion of indoor unit connecting port
Ⓕ Field pipe
8. Be sure to use non-oxidative brazing where necessary. If you do not use
non-oxidative brazing, it may clog the pipes.
While under a nitrogen purge, braze the indoor unit connecting port before
brazing the outdoor unit connecting port of BC controller.
When brazing the indoor unit connecting port, supply a nitrogen gas into the
outdoor unit connecting port of BC controller.
When brazing the outdoor unit connecting port of BC controller, supply a
nitrogen gas into the pipe between the outdoor unit and BC controller.
9. After completing pipe connection, support the pipes to ensure that load is
not imparted to the BC controller's end connections (particularly to the gas
pipes of indoor units).
Warning :
When installing and moving the unit, do not charge it with refrigerant other
than the refrigerant (R410A) specified on the unit.
- Mixing of a different refrigerant, air, etc. may cause the refrigerant cycle to mal-
function and result in severe damage.
Caution:
• Use refrigerant piping made of phosphorus deoxidized copper and copper
alloy seamless pipes and tubes. In addition, be sure that the inner and
outer surfaces of the pipes are clean and free of hazardous sulphur, oxides,
dust/dirt, shaving particles, oils, moisture, or any other contaminant.
- R410A is a high-pressure refrigerant and can cause the existing piping to burst.
• Store the piping to be used during installation indoors and keep both ends
of the piping sealed until just before brazing. (Store elbows and other
joints in a plastic bag.)
- If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and
compressor failure may result.
• Apply a small amount of ester oil, ether oil, or alkyl benzene to flares. (for
indoor unit)
- Infiltration of a large amount of mineral oil may cause the refrigerant oil to
deteriorate.
• Do not vent R410A into the atmosphere.
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