6.6 INSTALL REFRIGERANT LINE SET
The refrigerant line set is copper tubing factory fabricated with quick connect fittings to
ensure leak free connections. The quick connect fitting uses a double sealing system with an
automatic safety valve that releases refrigerant only when the outdoor unit is connected and
sealed.
CAUTION: When working with the refrigerant line set:
• Do not change the length of the supplied quick connect line set tubing as it is pre-charged
with freon gas. Excess tubing can be coiled behind the outdoor unit, taking care not to
block its airflow.
• Care must be taken not to kink the tubing, which could cause leaks.
• The ends of the tubing have protective covers on them to prevent any dirt or debris from
coming in contact with the connections. Do not remove the protective covers until
immediately before the connection is made.
• The minimum bend radius for the line set is 4 in. (102mm).
• If the line set connections are tightened with too little torque, they will leak. If they are
tightened with too much torque, the connections could suffer damage. Please refer to the
torque requirements when making the connections.
• The line sets are designed to only be installed once. The seal within the line set cannot be
guaranteed if they are installed more than once.
• The line set quick connects contain a compression fitting to seal and do not require a
thread sealant (Teflon tape, etc.). Using a sealant may cause the connection to leak over
time.
• Contact a licensed HVAC technician if there are any are concerns connecting the line set
connectors.
Installation Steps:
1. Prepare indoor unit line set by placing a hand on the underside of the piping coming through
the hole in the exterior wall. Using the other hand while applying even pressure, carefully
bend the piping downward toward the wall, being mindful not to damage or dent the piping in
the process.
2. Prepare the role of line set by carefully unwinding it to the length required to make the
connection between the outdoor unit and the indoor unit. Only unwind as much as
necessary and allow the remaining line set to stay coiled.
3. Pack the wall hole with the supplied neoprene (or spray foam can be used) to seal the hole,
filling any space that was not taken up by the line set and communication wire.
4. Remove the protective cover from the M2 connector of the indoor unit (see diagram on
following page).
5. Locate the unrolled end of the line set and remove the protective cover from the F2
connector (see diagram on following page).
Be careful to align the line set connections correctly, making sure the dimensions of
refrigerant line set match in diameter. Unscrew the protective caps and place the
threaded connector just inside the threads of opposite end and tighten the first few threads by
hand.
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