MXZ-SM42NAMHZ Installation Manual

9
4. Installing the refrigerant piping
Refrigerantpipearedconnectionofbranchbox mm(inch)
To indoor unit To outdoor
unit
ABCDE
Liquid pipe
ø6.35 (1/4) ø6.35 (1/4) ø6.35 (1/4) ø6.35 (1/4) ø6.35 (1/4) ø9.52 (3/8)
Gas pipe ø9.52 (3/8) ø9.52 (3/8) ø9.52 (3/8) ø9.52 (3/8) ø12.7 (1/2) ø15.88 (5/8)
* 3-branch type : only A, B, C
Conversion formula
1/4 F ø6.35 (1/4)
3/8 F ø9.52 (3/8)
1/2 F ø12.7 (1/2)
5/8 F ø15.88 (5/8)
3/4 F ø19.05 (3/4)
Pipe size
A
Liquid pipe Gas pipe
SM36
ø9.52 (3/8)
ø15.88 (5/8)SM42
SM48
SM60 ø19.05 (3/4)
B
• SM36/42/48
Liquid pipe Gas pipe
ø9.52 (3/8)
ø15.88 (5/8)
• SM60
Total capacity of
indoor units
Liquid pipe Gas pipe
– 54 kBtu/h
ø9.52 (3/8) ø15.88 (5/8)
54 kBtu/h –
ø9.52 (3/8) ø19.05 (3/4)
C
The piping connection size differs according to the type and capacity of indoor units.
Match the piping connection size of branch box with indoor unit.
If the piping connection size of branch box does not match the piping connection size
of indoor unit, use optional different-diameter (deformed) joints to the branch box
side. (Connect deformed joint directly to the branch box side.)
■ Pipe size (Branch box-Indoor unit) *Case of M series or S series Indoor unit
Indoor unit type (Btu/h) 06 09 12 15 18 24
30 36
Pipe size
(mm (inch))
Liquid
ø6.35
(1/4)
ø6.35
(1/4)
ø6.35
(1/4)
ø6.35
(1/4)
ø6.35
(1/4)
ø9.52
(3/8)
ø9.52
(3/8)
ø9.52
(3/8)
Gas
ø9.52
(3/8)
ø9.52
(3/8)
ø9.52
(3/8)
ø12.7
(1/2)
ø12.7
(1/2)
ø15.88
(5/8)
ø15.88
(5/8)
ø15.88
(5/8)
■ Pipe size (Branch box-Indoor unit) *Case of P series indoor unit
Indoor unit type (Btu/h) 09 12 15 18 24 30 36
Pipe size
(mm (inch))
Liquid
ø6.35
(1/4)
ø6.35
(1/4)
ø6.35
(1/4)
ø6.35
(1/4)
ø9.52
(3/8)
ø9.52
(3/8)
ø9.52
(3/8)
Gas
ø9.52
(3/8)
ø12.7
(1/2)
ø12.7
(1/2)
ø12.7
(1/2)
ø15.88
(5/8)
ø15.88
(5/8)
ø15.88
(5/8)
Different-diameter joint (optional parts) (Fig. 4-4)
Model name
Connected pipes diameter Diameter A Diameter B
mm (inch) mm (inch) mm (inch)
MAC-A454JP-E ø9.52 (3/8) → ø12.7 (1/2) ø9.52 (3/8) ø12.7 (1/2)
MAC-A455JP-E ø12.7 (1/2) → ø9.52 (3/8) ø12.7 (1/2) ø9.52 (3/8)
MAC-A456JP-E ø12.7 (1/2) → ø15.88 (5/8) ø12.7 (1/2) ø15.88 (5/8)
PAC-493PI ø6.35 (1/4) → ø9.52 (3/8) ø6.35 (1/4) ø9.52 (3/8)
PAC-SG76RJ-E ø9.52 (3/8) → ø15.88 (5/8) ø9.52 (3/8) ø15.88 (5/8)
PAC-SG75RJ-E ø15.88 (5/8) → ø19.05 (3/4) ø15.88 (5/8) ø19.05 (3/4)
Piping preparation
1 Tablebelowshowsthespecicationsofpipescommerciallyavailable.
Outside diameter Insulation thickness
Insulation material
mm (inch) mm (inch)
6.35 (1/4) 8 (5/16)
Heat resisting foam plastic 0.045
specicgravity
9.52 (3/8) 8 (5/16)
12.7 (1/2) 8 (5/16)
15.88 (5/8) 8 (5/16)
19.05 (3/4) 8 (5/16)
2 Ensure that the 2 refrigerant pipes are insulated to prevent condensation.
3 Refrigerant pipe bending radius must be 4” (100 mm) or more.
Caution:
Be sure to use the insulation of specied thickness. Excessive thickness may
cause incorrect installation of the indoor unit and branch box, and lack of
thickness may cause dew drippage.
2-branch pipe (Joint): Optional parts (According to the connection method,
you can choose the favorite one.)
Model name Connection method
MSDD-50AR-E are
MSDD-50BR-E brazing
■ Installation procedure (2 branches pipe (Joint))
Refer to the installation manuals of MSDD-50AR-E and MSDD-50BR-E.
The lineup of a connectable indoor unit depends on a district/areas/country.
A
CC C CC
A
B
B
CCCCC
A B
Fig. 4-3
Fig. 4-4
■ In case of using 2-branch boxes
■ In case of using 1-branch box
Flare connection employed. (No. brazing)
Branch box
Branch box #1
Branch box #2
2 branches pipe (joint)
: optional parts.
en
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