In. (mm)
Tightening Torque
1/4 (6.35)
15 ~ 20 N•m / 11.10-14.75 (ft-lbf)
3/8 (9.52)
30 ~ 40 N•m / 22.12-29.50 (ft-lbf)
1/2 (12.7)
45 ~ 55 N•m / 33.19-40.56 (ft-lbf)
5/8 (15.9)
60 ~ 65 N•m / 44.24-47.94 (ft-lbf)
3/4 (19.05)
70 ~ 75 N•m / 51.32-55.31 (ft-lbf)
14
115V Mini-Split
1. When connecting refrigerant pipe to the unit or removing it from the unit, please use both a
back-up wrench and the torque wrench. See illustration below.
2. When connecting, place oil on the backside of the copper tube flare prior to tightening. Do not
place oil on the flare face, as this will promote system contamination, tighten it by hand and
then tighten it with the spanner.
3. Refer to the torque reference table below before tightening to determine the appropriate torque
(too tight would damage the nut and lead to leakage).
4. Examine the connection pipe to see if it leaks, then apply the thermal insulation for the liquid
and gas lines, as shown below.
5. Use the medium-sized sponge wrap to insulate the connection point of the gas pipe.
Back-up Wrench
