Confirming Supplied Accessories; Dimensions And Required Servicing Space Of Branch Box - Mitsubishi Electric PAC-MK53BC Installation Manual

3. Confirming supplied accessories

8
5
4 3 7 1 2 9
Fig. 3-1

4. Dimensions and required servicing space of Branch Box

Optional different-diameter (deformed) joints
A
Fig. 4-1
Connected pipes diameter
Model name
mm
ø9.52 → ø12.7
MAC-A454JP
ø12.7 → ø9.52
MAC-A455JP
ø12.7 → ø15.88
MAC-A456JP
ø6.35 → ø9.52
PAC-493PI
ø9.52 → ø15.88
PAC-SG76RJ-E
ø15.88 → ø19.05
PAC-SG75RJ-E
ø15.88 → ø22.2
PAC-SG71RJ-E
PAC-MK53BC (5-branches type)
450
67
E D C B A
E D C B A
25 25
25 25 25
70 70 70 70
B
Diameter A Diameter B
mm mm
ø9.5 ø1.7
ø1.7 ø9.5
ø1.7 ø15.88
ø6.35 ø9.5
ø9.5 ø15.88
ø15.88 ø19.05
ø15.88 ø.*
*Brazing
A
320
B
C
90
96 280
72 83 87 70
D
K
Fig. 4-2
3.1. Check the Branch Box accessories and parts
No. Accessory name
Washer
1
(with insulation)
2
Washer
6
3 Pipe cover (Liquid)
4 Pipe cover (Gas)
5
Pipe cover (Liquid)
6 Pipe cover (Gas)
7 Joint cover (Liquid)
8
Joint cover (Gas)
9 Band
* 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 flared connection
* The piping connection size differs according to the type and capacity of
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 Suspension bolt pitch
B To indoor unit
C To outdoor unit
D Service panel
E Electric cover
F Rubber bush
G Terminal block (to indoor unit on control board)
H Terminal block (to outdoor unit)
J Terminal block (for communication cable)
K Cable clamp
PAC-MK53BC (Fig.4-2)
(mm)
Suspension bolt: W3/8 (M10)
Refrigerant pipe flared connection
A
Liquid pipe ø6.35
Gas pipe ø9.5
12
J
40
F E
H
Q'ty
PAC- PAC-
MK33BC MK53BC
4 4
4 4
1 1 To outdoor unit
1 1 To outdoor unit
3 5 To indoor units
3 5 To indoor units
1 3
1 3
16 4
To indoor unit
B C D E
ø6.35 ø6.35 ø6.35 ø6.35
ø9.5 ø9.5 ø9.5 ø1.7
Conversion formula
G
Remarks
mm
To outdoor unit
ø9.5
ø15.88
1/4 F ø6.35
3/8 F ø9.5
1/ F ø1.7
5/8 F ø15.88
3/4 F ø19.05
7/8 F ø.
3