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Piping installation
Installer reference guide
38
3AMXF-A9, 3AMXF-A9, 3AMXM-N9
R32 Split series
4P600463-1F – 2022.05
Port
Class
Reducer
B + C (Ø12.7mm)
20, 25, 35
2+4
(a)
Only in case of connection with FTXM42R.
1
2
3
4
5
6
Reducer type
Connection
1
Ø15.9 mm → Ø12.7 mm
2
Ø12.7 mm → Ø9.5 mm
3
Ø15.9 mm → Ø12.7 mm
4
Ø12.7 mm → Ø9.5 mm
5
Ø15.9 mm → Ø9.5 mm
6
Ø15.9 mm → Ø9.5 mm
Connection examples:
▪
Connecting a Ø12.7 mm pipe to a Ø15.9 mm gas pipe connection port
a
b
d
e
c
a
Outdoor unit connection port
b
Reducer no. 1
c
Reducer no. 3
d
Flare nut for Ø15.9 mm
e
Inter-unit piping
▪
Connecting a Ø9.5 mm pipe to a Ø15.9 mm gas pipe connection port
a
b
d
e
c
a
Outdoor unit connection port
b
Reducer no. 6
c
Reducer no. 5
d
Flare nut for Ø9.5 mm
e
Inter-unit piping
▪
Connecting a Ø9.5 mm pipe to a Ø12.7 mm gas pipe connection port
a
b
d
e
c
a
Outdoor unit connection port
b
Reducer no. 2
c
Reducer no. 4
d
Flare nut for Ø12.7 mm
e
Inter-unit piping
Coat the threaded connection port of the outdoor unit where the flare nut comes
in with refrigeration oil.