Leak Testing, Evacuating And Charging; Sealing Ducts; Condensate Drain Connections - Lennox CHX35 Series Installation Instructions Manual

LIQUID LINE CONNECTION
Use the following procedure to connect the liquid line to
the indoor coil:
1 - Remove rubber plug from the stubbed connection.
2 - Position the properly sized refrigerant piping and
make the brazed connection following the brazing
guidelines.
3 - Do not remove the water-saturated rags from the cabinet
and piping until the piping has cooled completely.

Leak Testing, Evacuating and Charging

Refer to the outdoor unit instruction for leak testing, evac-
uating and charging procedures. Always leak check entire
system before charging.

Sealing Ducts

Ensure the duct is secured and all joints are properly
sealed to the coil cabinet flanges.
WARNING
There must be an airtight seal between the bottom of
the air handler and the return air plenum. Use fiberglass
sealing strips, caulking, or equivalent sealing method
between the plenum and the air handler cabinet to
ensure a tight seal. Return air must not be drawn from a
room where this air handler or any gas-fueled appliance
(i.e., water heater), or carbon monoxide-producing
device (i.e., wood fireplace) is installed.
DUCT SYSTEM SIZING - The duct system should be
properly sized and installed according to the ASHRAE
Standard Manual D. The supply and return air duct
systems should be designed for the cfm and static
requirements of the job. Consult the blower performance
chart in the unit installation instructions to verify that the
blower meets the application requirements.

Condensate Drain Connections

After removal of drain pan plug(s), check drain hole(s)
to verify that drain opening is fully open and free of any
debris. Also check to make sure that no debris has fallen
into the drain pan during installation that may plug up the
drain opening.
MAIN DRAIN
Connect the main drain and route downward to drain line
or sump. Do not connect drain to a closed waste system.
See figure 9 for typical drain trap configuration.
OVERFLOW DRAIN
It is recommended that the overflow drain is connected to
a overflow drain line for all units. If overflow drain is not
connected, it must be plugged with provided cap.
BEST PRACTICES
The following practices are recommended to ensure bet-
ter condensate removal:
• Main and overflow drain lines should NOT be smaller
than drain connections at drain pan.
• Overflow drain line should run to an area where home-
owner will notice drainage.
• It is recommended that the overflow drain line be vented
and a trap installed. Refer to local codes.
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IMPORTANT
IMPORTANT