Piping Connection Method - Hitachi Air 365 Series Installation And Maintenance Manual

5. Refrigerant Piping Work

5.4.2 Piping Connection Method

Perform the piping connection work for each outdoor unit.
NOTE:
•
Ensure that the refrigerant pipe should be connected to the same refrigerant cycle unit.
Prepare the refrigerant pipe in the field for the piping work.
Refer to Fig. 5.2-1 and 5.2-2 for the position of piping connection.
•
Heat Pump
This piping connection is NOT used
at Heat Piping System (2 pipes)
High/Low Pressure Gas
Piping Connection A
Liquid Piping Connection B
Piping Cover
C
D
The figures illustrate the examples of a small cabinet.
< RNCC(L/R)W >
Piping Diameter
Model
Gas
RAS-080RNCC(L/R)W φ19.05
RAS-100RNCC(L/R)W
φ22.2
RAS-120RNCC(L/R)W
φ25.4
RAS-140RNCC(L/R)W φ25.4
RAS-160RNCC(L/R)W
φ28.58
RAS-180RNCC(L/R)W
φ28.58
RAS-200RNCC(L/R)W φ28.58
RAS-220RNCC(L/R)W
φ28.58
RAS-240RNCC(L/R)W
φ28.58
RAS-260RNCC(L/R)W φ31.75
RAS-280RNCC(L/R)W
φ31.75
< RNCBLW >
Piping Diameter
Model
Gas
RAS-080RNCBLW φ19.05
RAS-100RNCBLW φ22.2
RAS-120RNCBLW
φ25.4
RAS-140RNCBLW φ25.4
RAS-160RNCBLW
φ28.58
RAS-180RNCBLW
φ28.58
RAS-200RNCBLW φ28.58
*1. If Φ25.4 piping is not available, use Φ28.58 piping and a reducer (field-supplied).
*2. If Φ31.75 piping is not available, use Φ34.93 piping and a reducer (field-supplied).
35
G (Liquid Piping Connection)
H (High/Low Pressure Gas Piping Connection)
Liquid A
φ9.52
φ9.52 φ22.2
*1
φ12.7
*1
φ12.7
φ12.7 φ22.2
φ15.88
φ15.88
φ15.88
φ15.88 φ25.4
*2
φ19.05
*2
φ19.05
Liquid A
φ9.52
φ22.2
φ9.52
φ12.7
φ12.7 φ22.2
φ12.7
φ15.88
φ25.4
φ15.88
Fig. 5.2-1 Position of Piping Connection (Heat Pump)
Dimension (mm)
B C D
φ9.52 269 331 268
φ12.7 178 239 263
φ15.88 177 239 259
Dimension (mm)
B C D
φ9.52 269 331 268
φ12.7 178 239 263
φ15.88 177 239 259
Communication Wiring Outlet
( I 55 Knockout Hole)
Power Source Wiring Outlet
( I 65 Knockout Hole)
Gas Piping and Liquid Piping Outlet
(Knockout Square Hole)
E F G H
163 117 131
160 112 130
160 132 152
E F G H
163 117 131
160 112 130
160 132 152
Unit (mm)
Communication Wiring Outlet
( I 33 Knockout Hole)
65
K
J
127
I
This hole is not used.
I J K
240 225 305
147 132 212
147 132 212
I J K
240 225 305
147 132 212
147 132 212
A16381E84N-rev.1