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Page 26mrcool.com
Refrigerant Piping Connection
CAUTION
1.
shown in the illustration.
2.
3.
4.
IMPORTANT
1
1
2
2
NOTE:
to connect the line set.
Do not remove the plastic seals from the
outdoor unit piping connectors and
corresponding refrigerant pipes (line set
to be attached) until immediately before
you connect them.
Align the refrigerant pipes so they line up with
the corresponding valves and have enough
slack. NOTE: The refrigerant pipes must be
connected to the valves with as little stress
as possible. Unscrew the plastic seals and
place the screw connector of the refrigerant
line just onto the threads of the outdoor unit,
tightening the first few threads by hand.
The coupling of the outdoor unit uses tapping
rings, if you disconnect and reconnect the
refrigerant pipes, it could cause it to leak. This will
also void the warranty.
Step 4: Connect Line Set to the Outdoor Unit
IMPORTANT:
Before you continue, it is essential that you read
the following instructions carefully.
Using the first image below as a guide, starting with
the bottom screw connector, you will now tighten the
line set to the outdoor 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,” Now, turn the wrench on nut “2” in the direction of
the rotational arrow, while holding the other wrench in
place, as seen in the first image below. Continue to
tighten the connector until snug. NOTE: work quickly
and make sure the screw connectors do not
become crooked as you tighten them.
*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 on the next page (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, then turn the
wrench slightly beyond that point to torque the
connector, but do not overtighten it.
Repeat the same process for the top screw connector,
using the second image below as a guide.
5.
NOTE:
Keep excess refrigerant hose coiled. Wrap with
protective tape and store behind the condenser in
a horizontal position (flat with the ground).
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