Owners Manual
Unit Installation
Page 9 mrcool.com
Screw Connection
C
onnect the pipe to the unit. Follow all instructions below. Use both a spanner and torque wrench. When
connecting the tapered flare nut, first apply Polyolester oil (POE oil) on its inner and outer surface. Then,
screw the first 3 or 4 threads by hand. Next, tighten the nut with the spanner and torque wrench. Confirm
the tightening torque by referring to the following table.
Keep pipe connection exposed to perform the leak
test.
DO NOT over-tighten the nut as it could damage it and cause the connection to leak.
Pipe diameter (inch) Tightening torque: ft-lbs (N·m)
1/4 in 11-22 ft-lbs (15-30 N·m)
3/8 in 26-30 ft-lbs (35-40 N·m)
1/2 in 33-37 ft-lbs (45-50 N·m)
5/8 in 44-48 ft-lbs (60-65 N·m)
3/4 in 52-55 ft-lbs (70-75 N·m)
7/8 in 59-63 ft-lbs (80-85 N·m)