• Do not reduce drain line size less than connection size provided on condensate drain pan.
• All drain lines must be pitched downward away from the unit a minimum of 1/8” per
foot of line to ensure proper drainage.
• Do not connect condensate drain line to a closed or open sewer pipe. Run conden-
sate to an open drain or outdoors.
• The drain line should be insulated where necessary to prevent sweating and damage
due to condensate forming on the outside surface of the line.
• Make provisions for disconnecting and cleaning of the primary drain line should it
become necessary. Install a 3 in. trap in the primary drain line as close to the unit as
possible. Make sure that the top of the trap is below connection to the drain pan to
allow complete drainage of pan (See Figure 12).
• The auxiliary drain line should be run to a place where it will be noticeable if it becomes
operational. The building occupant should be warned that a problem exists if water
should begin running from the auxiliary drain line. An auxiliary drain shut-off switch can
be installed in lieu of an auxiliary drain line. The shut-off switch should be wired into the
control circuit so the outdoor unit shuts down should the switch detect water.
• Plug the unused drain connection with the plugs provided in the parts bag, using a
thin layer of teflon paste, silicone or teflon tape to form a water tight seal.
• Test the condensate drain pan and drain line after installation is complete. Pour water
into drain pan, enough to fill drain trap and line. Check to make sure drain pan is
draining completely, no leaks are found in drain line fittings, and water is draining from
the open end of the primary drain line.
21
F
IGURE 11
T
XV BULB & FOAM GASKET LOCATION
ST-A1278-01
TXV BULB
FOAM GASKET
FIGURE 12
CONDENSATE DRAIN TRAP
ST-A1244-01-01
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