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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
< Standard Type: RAS-080 to H12HNCCLW>
Applicable
Outdoor Unit
Outdoor
Outdoor
Unit
Unit
HP
Number
MC-NP21SA1 for Gas: 1
30 - 48
2
50 - 56
2
58 - 84
3
86 - 112
4
< High Efficiency Type: RAS-080 to 880HNCBLW >
Applicable
Outdoor Unit
Outdoor
Outdoor
Unit
Unit
HP
Number
MC-NP21SA1 for Gas: 1
24 - 44
2
MC-NP30SA1 for Gas: 2
46 - 66
3
68 - 88
4
•
Heat Recovery
< Standard Type: RAS-080 to H12RNCCLW>
Applicable
Outdoor Unit
Outdoor
Outdoor
Model
Unit
Unit
HP
Number
30 - 48
2
MC-NP21SX1 for Low Pressure Gas: 1
50 - 56
2
MC-NP22TX
58 - 84
3
MC-NP31TX
86 - 112
4
MC-NP40TX
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.
43
Model
Remarks
for Liquid: 1
for Gas: 1
MC-NP22TA
for Liquid: 1
for Gas: 2
MC-NP31TA
for Liquid: 2
for Gas: 3
MC-NP40TA
for Liquid: 3
Model
Remarks
for Liquid: 1
for Liquid: 2
MC-NP40TA for Gas: 3
for Liquid: 3
Remarks
for High/Low Pressure Gas: 1
for Liquid: 1
for Low Pressure Gas: 2
for High/Low Pressure Gas: 2
for Liquid: 2
for Low Pressure Gas: 3 for
High/Low Pressure Gas: 3
for Liquid: 3
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 46.
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
A16381Z84L-rev.1
L
C
*1
Outdoor
Unit
D
L
D
*1
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