20
• 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 7).
• Auxiliary drain line should be run to a place where it will be noticeable if it becomes
operational. Occupant should be warned that a problem exists if water should begin
running from the auxiliary drain line.
• 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 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 ter-
mination of the primary drain line.
9.0 AIR FILTER
Filter application and placement are critical to airflow, which may affect the heating and
cooling system performance. Reduced airflow can shorten the life of the system’s major
components, such as motor, limits, elements, heat relays, evaporator coil or compressor.
Consequently, we recommend that the return air duct system have only one filter loca-
tion. Systems with a return air filter grill or multiple filter grills, can have a filter installed
at each of the return air openings.
If high efficiency filters or electronic air cleaners are used in the system, it is important
that the airflow is not reduced to maximize system performance and life. Always verify
that the system’s airflow is not impaired by the filtering system that has been installed,
by performing a temperature rise and temperature drop test.
IMPORTANT: DO NOT DOUBLE FILTER THE RETURN AIR DUCT SYSTEM. DO NOT
FILTER THE SUPPLY AIR DUCT SYSTEM.
FIGURE 7
CONDENSATE DRAIN TRAP
DO NOT OPERATE UNIT WITHOUT
CONDENSATE DRAIN TRAP.
UNIT MUST BE SLIGHTLY INCLINED
TOWARD DRAIN CONNECTION.
DO NOT OVERTIGHTEN DRAIN FITTING
UNIT
3''
3''
!
WARNING
Do not operate the system without filters. A portion of the dust entrained in the
air may temporarily lodge in the duct runs and at the supply registers. Any cir-
culated dust particles could be heated and charred by contact with the air han-
dler elements. This residue could soil ceilings, walls, drapes, carpets and other
articles in the house.
Soot damage may occur with filters in place, when certain types of candles, oil
lamps or standing pilots are burned.
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