21
APPLICATION DATA
Condensate trap — A 2-- in. (51 mm) condensate trap must be
field supplied.
Ductwork — 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 downflow openings. Removal
of the inserts is similar to removing an electrical knock-- out. Units
installed in horizontal discharge orientation do not require duct
covers.
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 in cooling mode. Airlow can be lower in certain modes
when humidity removal is an issue.
Minimum ambient cooling operation temperature —All
standard units have a minimum ambient cooling operating
temperature of 40_F(4.4_C). With accessory low ambient
temperature kit, units can operate at temperatures down to 0_F
(17.8_C).
Maximum operating outdoor air temperature for cooling is
125_F (51.7_C).
BALANCE POINT WORKSHEET
0
10
20
30
40
50
60
70
-20-10 0 10203040506070
OUTDOOR TEMPERATURE, ºF
BUILDING HEAT LOSS, UNIT INTEGRATED
HEATING CAPACITY, MBTUH
60
BASED ON INDOOR ENT. AIR AT
70 ºF AND AT RATED CFM
48
42
36
30
24
A09269
50EZ--A
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