EN-47
EN-48
5
REFRIGERANT PIPING
WARNING
If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may be generated.
After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a fan heater, cooking stove or heating
unit, noxious gas may be generated.
Permissible pipe length and permissible height difference
The length of a connection pipe to the indoor unit should be 50 m or less.
For details, refer to the installation manual attached to the outdoor unit.
REQUIREMENT
When the refrigerant pipe is long, set the support brackets to fix the pipe at intervals of 2.5 to 3m.
If the pipe is not fixed, noise may be generated.
Piping dimensions
Outdoor unit
Outdoor unit
Single Indoor unit connection
Multi indoor unit connection
FS unit
FS unit
indoor unit
indoor unit
(2)
(1)
(1)
(2)
(4) (3)
(4)
(2)
(2)
(3)
Outdoor unit side pipe size (1)
Indoor unit side pipe size (2)
Capacity rank
Equivalent to HP
005 to 012
Length of piping
Gas side Liquid side
015 to 018
024 to 056
072 to 096
Indoor unit side pipe size (3)
0.6 to 1.25
1.7 to 2.0
2.5 to 6.0
8.0 to 10.0
–
–
15m or less real length
Exceeds 15m real length
Exceeds 15m real length
15m or less real length
Φ15.9
Φ22.2
Φ9.5
Φ12.7
Φ15.9
Φ12.7
Φ9.5
Φ12.7
Φ6.4
Φ9.5
Φ9.5
Φ6.4
Total capacity codes of indoor units at the downstream side
Equivalent to HP
Below 18.0
Suction gas side
Liquid side
18.0 to below 28.0
Below 6.4
6.4 to below 10.0
Φ15.9
Φ22.2
Φ9.5
Φ12.7
Equivalent to capacity
Y-shaped branching joint (4)
Total capacity codes of indoor units at the downstream side
Y-shaped branching joint
Equivalent to capacity
Equivalent to HP
Model name
Below 18.0
Below 6.4
RBM-BY55E
18.0 to below 28.0
6.4 to below 10.0
RBM-BY105E
RBM-
Y1124FE
kW
Below 11.2
HP
Below 4.0
Suction gas pipe
Φ15.9
Discharge gas pipe
Φ12.7
Liquid pipe
Φ9.5
Y1804FE
11.2 to below 18.0
4.0 to below 6.4
Φ15.9
Φ12.7
Φ9.5
Y2804FE
18.0 to 28.0 or less
6.4 to 10.0 or less
Φ22.2
Φ19.1
Φ12.7
Flow Selector unit
Outdoor unit side pipe size
(mm)
Total capacity codes of indoor units
at the downstream side
24
Содержание RBM-Y1124FE
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