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5. Refrigerant Piping Work
5.5 Piping Work between Outdoor Units
The optional piping connection kit is required to combine
base units.
It is NOT required for the base units.
•
Heat Pump
For ANZ
Applicable
Outdoor Unit
High
Standard
Efficiency
Type
Number
Type
HP
HP
26-48
22-40
2
-
42-48
3
50-64
-
3
For LA
Applicable
Outdoor Unit
Outdoor
Model
Unit
Number
HP
30 - 48
2
MC-NP21SA1
50 - 56
2
MC-NP22TA
58 - 84
3
MC-NP31TA
86 - 112
4
MC-NP40TA
•
Heat Recovery
For ANZ
Applicable
Outdoor Unit
High
Standard
Efficiency
Type
Num.
Type
HP
HP
26-48
22-40
2
MC-NP21SX1
-
42-48
3
MC-NP30SX1
50-64
-
3
MC-NP31TX
For LA
Applicable
Outdoor Unit
Outdoor
Model
Unit
Number
HP
30 - 48
2
MC-NP21SX1
50 - 56
2
MC-NP22TX
58 - 84
3
MC-NP31TX
86 - 112
4
MC-NP40TX
45
Piping
Model
Remarks
Set
for Gas: 1
MC-NP21SA1
1
for: Liquid 1
MC-NP30SA1
for Gas: 2
2
for: Liquid 2
MC-NP31TA
Piping Set
Remarks
for Gas: 1
1
for Liquid: 1
2
for Gas: 2
3
for Gas: 3
Piping
Model
Remarks
Set
for Low Press. Gas: 1
1
for High Press. Gas: 1
for: Liquid 1
for Low Press. Gas: 1
2
for High Press. Gas: 1
for: Liquid 1
Piping
Remarks
Set
for Low Press. Gas: 1
1
for High Press. Gas: 1
for: Liquid 1
for Low Press. Gas: 1
2
for High Press Gas: 1
for: Liquid 1
for Low Press. Gas: 1
3
for High Press Gas: 1
for: Liquid 1
Select the pipe size according to items 5.5.1 to 5.5.4
"Piping Size between Outdoor Units".
For refrigerant piping work, the optional piping
connection kit is required to branch the pipe between
outdoor units.
The arrangement for outdoor units should be determined
depending on the piping direction when the refrigerant
piping work and installation work are planned. When the
outdoor unit is installed, perform the installation work
according to the following restrictions.
1. Piping length between piping connection kit 1 and
each outdoor unit should be LA < LB < LC < 25m,
LD - LA ≤ 10m, LC - LA ≤ 10m, LB - LA ≤ 10m.
Keep the straight-line distance of 500mm or more
after the piping connection kit 1.
Outdoor
Indoor Unit Side
Piping Connection Kit 1
Keep the straight-line
distance of 500mm or
more for piping a er
Outdoor
Unit
the piping connection kit.
A
Indoor Unit Side
Piping Connection Kit 1
Indoor Unit Side
Piping
Piping
Connection Kit 1
Connection Kit 2
Keep the straight-line
Outdoor
distance of 500mm or
Unit
more for piping a er
A
the piping connection kit.
Piping
Indoor Unit Side
Connection Kit 2
Piping
Connection Kit 1
*1. Refer to 7. on page 48.
Outdoor
Outdoor
Unit
Unit
Unit
A
B
C
L
L
A
B
Piping Connection Kit 2
Upstream Side
The height di erence
between outdoor units
must be 2.0m or less.
If it exceeds 100mm,
Outdoor
follow 7.
Outdoor
Unit
Unit
C
B
Piping Connection Kit 2
Outdoor
Outdoor
Outdoor
Unit
Unit
Unit
A
B
C
L
L
L
A
B
C
Piping
Connection Kit 3
Upstream Side
The height di erence
between outdoor units
must be 2.0m or less.
If it exceeds 100mm,
Outdoor
Outdoor
follow 7.
Outdoor
Unit
Unit
Unit
C
D
B
Piping
Connection Kit 3
A16381E84N-rev.1
L
C
*1
Outdoor
Unit
D
L
D
*1
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