Owners Manual

Page 25 mrcool.com
Refrigerant Piping Connection
3.
Outer Pipe
Diameter
inch (millimeter)
Stamp
Maximum
lb·ft (N·m)
N·m
N·m
N·m
N·m
TORQUE REQUIREMENTS
1.
2.
3.
in
Repeat the same process for the second line.
4.
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, you follow the steps to check for leaks. If you do
not feel comfortable attempting this, please contact a qualified HVAC technician.
1
Using the image below as a guide, and the steps
outlined in this paragraph, you will now tighten the
nuts of the screw connectors of the Quick
Connect® Line Set to the indoor unit. Using two
appropriate sized open-ended wrenches
(depending on the dimensions of the connector) or
adjustable crescent wrenches, place one of the
wrenches on the nut marked “1”, and the other
wrench on the nut marked “2,” as shown in the
image below. Now, turn the wrench marked “2” in
the direction of the rotational arrows, as shown,
while holding the other wrench in place. Continue
to tighten the connector until snug. NOTE: work
quickly and make sure the screw connectors do
not become crooked as you tighten them.
2
*If an HVAC torque wrench is available: Once the
connector is snug, using the torque wrench, tighten
the connector to the specified torque rating, listed in
the table above (based on the pipe size).
*If an HVAC torque wrench is NOT available:
Using the two wrenches you used to tighten the
connector, once the connector is snug, turn the
wrench slightly beyond that point to torque the
connector, but do not overtighten it.