Installing Bc Controller; Checking The Accessories With Bc Controller; Installing Bc Controllers; Connecting Refrigerant Pipes And Drain Pipes - Mitsubishi Electric City Multi CMB-P-NU-G 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-
P104NU-G
P105NU-G
P106NU-G
P108NU-G
P1010NU-G
P1013NU-G
P1016NU-G
Item
1
Drain hose
1
2
Tie band
1
3
Hose band
1
4
Reducer
(large & small)
5
Refrigerant
3
connection pipe

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 flare 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 connected indoor units is less than the number of branch
holes, it does not matter which end connections you leave.
Seal unused end connections using flare nuts with end caps just as they were
capped when shipped from the factory. Not replacing on end cap will lead to
refrigerant leakage.
4. When using twinning pipes (CMY-Y102S-G2, CMY-Y102L-G2, CMY-Y202-G2),
be sure to connect them level.
5. Be sure to tighten the flare nuts using two wrenches. Otherwise the refrigerant
may leak.
6. Be sure to use non-oxidative brazing where necessary. If you do not use non-
oxidative brazing, it may clog the pipes.
7. 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).
Model name
CMB- CMB- CMB- CMB-
P108NU-GA P104NU-GB P1016NU-HA P1016NU-HB
P1010NU-GA P108NU-GB
P1013NU-GA
P1016NU-GA
Qty
1
1 1
1
1 1
1
1 1
Same number as branch holes
1
3 8

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 mm [13/32 in] (M10 screw).
To hang the unit, use a lifting machine to lift and pass it through the hanging bolts.
Suspension bracket has an oval hole. Use a large diameter washer.
[Fig. 3.2.1]
Hanging method
1
1
1
A Hanging bolt ø10 [13/32] (field-supplied) B Washer (field-supplied)
8
A: Min.30 [1-3/16]
s Be sure to install the BC controllers level. Installing obliquely may cause
a risk of drain leakage. Use a level to check the unit's level. If it is oblique,
loosen the fixing nut and make an adjustment.
Caution:
Be sure to install the unit body level.
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 cop-
per 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 contami-
nant.
- 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.
<Top view>
A
14
[9/16]
B
(Unit: mm [in])
7