Confirming Supplied Accessories; Dimensions And Required Servicing Space Of Branch Box - Mitsubishi Electric PAC-MK51BCB Manuel D'installation

3. Confirming supplied accessories

⑩ ⑪
Fig. 3-1

4. Dimensions and required servicing space of Branch Box

Optional different-diameter (deformed) joints
A (Outside)
Fig. 4-1
Connected pipes diameter
Model name
mm
PAC-SG78RJB-E ø9.52 → ø12.7
PAC-SG79RJB-E ø12.7 → ø9.52
PAC-SG80RJB-E ø12.7 → ø15.88
PAC-SG77RJB-E ø6.35 → ø9.52
PAC-SG76RJB-E ø9.52 → ø15.88
PAC-MK51BCB (5-branches type)
E D C B A
E D C B A
3.1. Check the Branch Box accessories and parts
1
2
3
4
5
6
7
8
9
⑩
⑪
* Please connect  indoor units or more with 1 system.
* Up to  branch boxes may be connected to 1 outdoor unit.
* Suspension bolt : W3/8 (M10)
* Refrigerant pipe brezed connection
B (Inside)
* The piping connection size differs according to the type and capacity of
Outside Inside
Diameter A Diameter B
A Suspension bolt pitch
mm mm
B To indoor unit
ø9.5 ø1.7
C To outdoor unit
ø1.7 ø9.5
D Service panel (for LEV, THERMISTOR)
ø1.7 ø15.88
E Electric cover
ø6.35 ø9.5
F Rubber bush
ø9.5 ø15.88
G Terminal block (to indoor unit on control board)
H Terminal block (to outdoor unit)
J Terminal block (for communication cable)
(mm)
K Cable clamp
* Ensure that the branch box is installed as shown on the below drawing.
PAC-MK51BCB (Fig.4-2)
Suspension bolt: W3/8 (M10)
Refrigerant pipe brazed connection
Liquid pipe
Gas pipe
Fig. 4-2
Accessory name PAC-
MK31BCB
Washer
4
(with insulation)
Washer 4
Pipe cover (Liquid) 1
Pipe cover (Gas) 1
Pipe cover (Liquid) 3
Pipe cover (Gas) 3
Joint cover (Liquid) 1
Joint cover (Gas) 1
Band 16
Joint Pipe (Liquid) 1
Joint Pipe (Gas) 1
indoor units. Match the piping connection size for indoor unit and branch
box. If the piping connection size of branch box does not match the pip-
ing connection size of indoor unit, use optional different-diameter (de-
formed) joints to the branch box side. (Connect deformed joint directly to
the branch box side.)
A B C
ø6.35 ø6.35 ø6.35
ø9.5 ø9.5 ø9.5
Q'ty
PAC-
MK51BCB
4
4
1 TO OUTDOOR UNIT
1 TO OUTDOOR UNIT
5 TO INDOOR UNITS
5 TO INDOOR UNITS
3
3
4
1
1
D E To outdoor unit
ø6.35 ø6.35 ø9.5
ø9.5 ø1.7 ø15.88
mm
3