21
Balance Point Worksheet
0
10
20
30
40
50
60
70
-100 1017203040475060
Outdoor Air Temp (Deg F)
Building Heat Loss, 1000BTUH
Unit Integrated Heating Capacity (x1000BTUH)
024
030
036
042
048
060
Based on Indoor Entering Air of 70 F and Rated CFM
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 cooling airflow
is 350 cfm/ton.
Minimum cooling ambient operating temperature — All
standard units have a minimum ambient operating
temperature of 40°F. Units with the ICM Indoor Motor FIOP
have a minimum cooling outdoor 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
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