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Magnum Series
CONNECTING THE LINESET, CONTINUED
PIPING EXTENSION BEYOND FLARE FORM
TORQUE REQUIREMENTS
When connecting refrigerant pipes, be careful not to use any excessive torque or to deform the piping. You should rst con-
nect the low pressure pipe, then the high pressure pipe. It is recommended to use a CFC and HCFC compatible thread sealant
on all threaded pipe connections.
1. Align the center of the two pipes that will be connected. To prevent gas leakage, apply refrigeration oil only to the inner sur-
face of the are. Use torque wrenches when tightening the are nuts to prevent damage to the are nuts and gas leakage.
2. Tighten the are nut as tight as possible by hand.
3. Using a spanner, grip the nut on the unit tubing.
4. While rmly gripping the nut on the unit tubing, use a torque wrench to tighten the are nut according to the torque values
in the torque requirements table (below). Loosen the aring nut slightly, then tighten again. Prior to applying recommended
torque to brass are nut, it is highly recommended that a small amount of refrigeration oil be applied to the are threads, are
sealing surface, and copper tubing ared surface. This will prevent galling of sealing surfaces and aid in providing a refrigerant
tight seal (Use refrigeration oil for R134a). Be careful not to overtighten the connection, as this may damage the are or tting.
4. Connect Pipes
Outer Diameter of Pipe
(in.)
A (in.)
Min. Max.
¼” 0.0275” 0.05”
⁄” 0.04” 0.063”
½” 0.04” 0.07”
⁄” 0.078” 0.086”
¾” 0.078” 0.094”
Outer Diameter of Pipe (in.) Tightening Torque (lb/ft)
¼” 11 lb/ft
¼” 18.4 lb/ft
½” 25.8 lb/ft
⁄” 33.19 lb/ft
¾” 47.94 lb/ft
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