7 | Piping installation
Installer reference guide
43
2MXM68+3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1C – 2020.08
To open/close the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench (liquid side: 4 mm, gas side: 6 mm) into the valve
stem and turn the valve stem:
Counterclockwise to open
Clockwise to close
3 When the stop valve CANNOT be turned any further, stop turning.
4 Install the stop valve cover.
Result: The valve is now open/closed.
To handle the stem cap
▪ The stem cap is sealed where indicated with the arrow. Do NOT damage it.
▪ After handling the stop valve, tighten the stem cap, and check for refrigerant
leaks.
Piping Ø (mm) Width across flats (mm) Tightening torque (N∙m)
6.4 17 15~17
9.5 19 18~20
12.7 22 22~27
15.9 27 48~59
To handle the service cap
▪ ALWAYS use a charge hose equipped with a valve depressor pin, since the service
port is a Schrader type valve.
▪ After handling the service port, tighten the service port cap, and check for
refrigerant leaks.
Item Tightening torque (N∙m)
Service port cap 11~14
7.2.8 To connect the refrigerant piping to the outdoor unit
▪ Piping length. Keep field piping as short as possible.
▪ Piping protection. Protect the field piping against physical damage.
1 Connect the liquid refrigerant connection from the indoor unit to the liquid
stop valve of the outdoor unit.
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