Page 27 mrcool.com
Refrigerant Piping Connection
CAUTION
IMPORTANT
1
1
2
2
2. 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.
NOTE: Ensure the adapters attached to the
outdoor valves have been tightened properly
before attempting to connect the line set.
3. 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
For your safety, always wear goggles and work gloves when connecting the pipes.
1. First remove the water
tray on the outdoor
unit as shown in the
illustration to the right.
IMPORTANT:
Before you continue, it is essential that you read
the following instructions carefully.
4. 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/coupling 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.
5. Repeat the same process for the top screw connector,
using the second image below as a guide.
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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