—21—
Condensate trap — A 2-in. 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. Remove the inserts similar to removing an
electrical knock-out. Leave on duct covers to seal the
horizontal discharge openings in the unit. 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/ton.
Minimum cooling airflow — The minimum airflow is 350
cfm/ton for cooling mode. Airflow can be lower in certain
modes when humidity removal is an issue.
Minimum cooling ambient operating temperature — All
standard units have a minimum ambient operating
temperature of 55°F. With accessory low ambient
temperature kit, units can operate at temperatures down to
0°F.
Maximum operating outdoor air temperature —
Maximum outdoor operating air temperature for cooling is
125°F.
APPLICATION DATA
1” MIN.
2” MIN.
TRAP
OUTLET
Balance Point Worksheet
0
10
20
30
40
50
60
70
-20 -10 0 10 20 30 40 50 60
Outdoor Air Temp (Deg F)
Building Heat Loss, 1000BTUH
Unit Intetgrated Heating Capacity,
1000BTUH
060
048
042
036
030
024
Based on Entering Indoor Air of 70 Deg. F and Rated CFM
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