Page 28mrcool.com
Refrigerant Piping Connection
1. Excessive force can break the connector or damage the refrigerant piping. You must not
exceed the torque requirements shown in the table below.
2. You can find the Outer Pipe Diameter stamped (in inches) on the valve set of the condenser.
Refer to this when finding and applying the torque values in the table below.
3. Please note that there may be differences in Torque Wrenches (i.e. automotive torque
wrench versus an HVAC torque wrench) and that a socket style wrench cannot be used in this
installation.
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 over-tighten the
connector, and that once the lines have been fully connected, 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.
TORQUE REQUIREMENTS
FA06
FA09
FA12
FA16
3/8 in (9.5 mm)
1/2 in (12.7 mm)
3/4 in (19.1 mm)
1 in (25.4 mm)
18-20 lb/ft
(24.4-27.1 Nm)
30-35 lb/ft
(40.6-47.4 Nm)
45-50 lb/ft
(61.0-67.7 Nm)
60-65 lb/ft
(81.3-88.1 Nm)
Stamp
(on
connector)
Coupling Size
inch (millimeter)
Tightening Torque
lb-ft (N-m)
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