18
Installation Instructions
3. Piping Connections to Outdoor Unit
Service
Valve Cover
Apply a small amount of refrigerant oil to the flare connection
on the refrigerant pipe.
Properly align piping and tighten flare nut using a standard
wrench and a torque wrench as shown in the indoor piping section.
Carefully tighten flare nuts to correct torque level referring to the
following Torque Table:
Carefully bend and adjust length of refrigerant pipes to meet
outdoor unit service valves connection with proper tools to
avoid kinks.
Remove service valve cover( if provided) to access the service
valves and refrigerant ports.
Pipe diameter
/inch(mm)
Nut Size
/inch(mm)
Tightening Torque
ft-lbs
N-m
1/4(6.35)
1/4(17)
11 to 15
15 to 20
3/8(9.5)
3/8(22)
22 to 26
30 to 35
1/2(12.7)
1/2(25)
37 to 41
50 to 55
5/8(15.9)
5/8(29)
44 to 48
60 to 65
Torque Table
Note: Over tightening may damage flare connections and cause leaks.
