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3. Confi rming 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
MAC-A454JP
ø9.52 → ø12.7
MAC-A455JP
ø12.7 → ø9.52
MAC-A456JP
ø12.7 → ø15.88
PAC-493PI
ø6.35 → ø9.52
PAC-SG76RJ-E
ø9.52 → ø15.88
PAC-MK51BC (5-branches type)
450
93
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
ø9.52
ø12.7
ø12.7
ø9.52
ø12.7
ø15.88
ø6.35
ø9.52
ø9.52
ø15.88
A
320
B
12
C
96
102
278
81
90
87
70
F E
K
D
Fig. 4-2
3.1. Check the Branch Box accessories and parts
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 2 indoor units or more with 1 system.
* Up to 2 branch boxes may be connected to 1 outdoor unit.
* Suspension bolt : W3/8 (M10)
* Refrigerant pipe fl ared 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 (for LEV, THERMISTOR)
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)
(mm)
K Cable clamp
* Ensure that the branch box is installed as shown on the below drawing.
PAC-MK51BC (Fig.4-2)
Suspension bolt: W3/8 (M10)
Refrigerant pipe fl ared connection
A
Liquid pipe
ø6.35
Gas pipe
ø9.52
40
J
G
H
Q'ty
PAC-
PAC-
MK31BC
MK51BC
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
24
B
C
D
E
ø6.35
ø6.35
ø6.35
ø6.35
ø9.52
ø9.52
ø9.52
ø12.7
Conversion formula
1/4 F
ø6.35
3/8 F
ø9.52
1/2 F
ø12.7
5/8 F
ø15.88
3/4 F
ø19.05
mm
To outdoor unit
ø9.52
ø15.88
3
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