YMGI: Your Modern Green Idea
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Outdoor Unit Pipe Connections
1. Remove service valve cover (if provided) to access the service
valves and refrigerant ports.
2. Carefully bend and adjust length of refrigerant pipes to meet
outdoor unit service valve connections with proper tools to avoid
kinks.
3. Add a small amount of refrigerant oil to both ends of the flare
fittings.
4. Starting with either refrigerant pipe, carefully center the pipe to the
indoor unit connection port then hand tighten the flare nut.
5. Repeat procedure with remaining pipe.
6. Tighten both flare nuts using a standard wrench and a torque
wrench as shown.
7.
Carefully tighten flare nuts to correct torque level referring to the
Torque Table below.
Pipe Diameter
inch (mm)
Nut Size
inch (mm)
Tightening Torque
ft-lbs
N-m
1/4”
(6.35)
1/4”
(17)
10 to 13
14 to 18
3/8
(9.5)
3/8”
(22)
25 to 30
34 to 42
1/2”
(12.7)
1/2”
(25)
36 to 45
49 to 61
5/8 “
(15.9)
5/8”
(29)
50 to 60
68 to 82
Over tightening may damage flare connections and cause leaks.