45
APPLICATION DATA
Condensate trap — A 2 -- in. (51 mm) condensate trap must be
field supplied.
Ductwo rk — Secure downflow discharge ductwork to roof curb.
For horizontal discharge applications, attach ductwork to unit with
flanges.
To convert a unit to downflow discharge — Units are equipped
with factory -- installed inserts in the down -- flow openings. Removal
of the inserts is similar to removing an electrical knock-- out. Use
the duct cover to seal the horizontal discharge openings in the unit.
Units installed in horizontal discharge orientation do not require
duct covers.
Airflow — Units are draw -- thru in the cooling mode and
blow--thru in the heating mode.
Maximum cooling airflow — To minimize the possibility of
condensate blow-- off from the evaporator, airflow through the units
should not exceed 450 cfm per ton.
Minimum cooling airflow — Minimum cooling airflow is 350
cfm per ton.
Minimum ambient cooling operation temperature —All
standard units have a minimum ambient operating temperature of
40_F(4_C). With accessory low ambient temperature kit, units can
operate at temperatures down to 0_F(--17_C).
Minimum temperature — Air entering the heat exchanger in
heating mode must be a minimum of 50_F(10_C) continuous
and/or 45_F(7_C) intermittent.
574D-- -- A
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