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Owners Manual

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Page 27 mrcool.com
Refrigerant Piping Connection
TORQUE REQUIREMENTS
Excessive force can break the nut or damage the refrigerant piping. You must not exceed
torque
requirements shown in the table below.
2.
3.
versus a HVAC torque wrench) and that a socket style wrench cannot be used here.
Outer Diameter
of Pipe
inch (millimeter)
Stamp
lb·ft (N·m)
lb·ft (N·m)
N·m
N·m
N·m
N·m
N·m
N·m
N·m N·m
in
in
in
in
NOTE: Torque ratings in the table below are to be used if you have access to an HVAC torque
wrench. These are available for purchase from online retailers. However, it is possible to complete
installation of refrigerant line sets with conventional open-ended/crescent wrenches. It is
imperative, however, that you not overtighten the connector, and that once the lines have been
fully connected, and the valves have been opened, you follow the steps to check the pipe
connections for leaks (Refer to the Electrical & Gas Leak Checks section of this manual for more
information) . If you do not feel comfortable attempting this, please contact a qualified HVAC
technician.