Using The Stop Valve And Service Port - Daikin 3MXM40N2V1B9 Installer's Reference Manual

7 | Piping installation

7.2.7 Using the stop valve and service port

To handle the stop valve
Installer reference guide
40
Reducer type
5
6
Connection examples:
▪ Connecting a Ø12.7 mm pipe to a Ø15.9 mm gas pipe connection port
a b
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
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
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.
Flare nut for (mm)
Ø9.5
Ø12.7
Ø15.9
NOTICE
Use an appropriate wrench to avoid damaging the connection thread by
overtightening the flare nut. Be careful NOT to overtighten the nut, or the smaller
pipe may be damaged (about 2/3-1× the normal torque).
Take the following guidelines into account:
Connection
Ø15.9 mm → Ø9.5 mm
Ø15.9 mm → Ø9.5 mm
c d e
c d e
c d e
Tightening torque (N•m)
2MXM68+3(A)MXM+3(A)MXF+4MXM+5MXM
33~39
50~60
62~75
R32 Split series
4P600463-1D – 2021.03