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10.0 CALCULATIONS
10.1 CALCULATING TEMPERATURE RISE
• The formula for calculating air temperature rise for electric resistance heat is:
Temperature Rise °F =
Where: 3.16 = Constant, CFM = Airflow
10.2 CALCULATING BTUH HEATING CAPACITY
• The formula for calculating BTUH heating capacity for electric resistance heat is:
BTUH Heating = Watts x 3.412
Where: 1 kW = 1000 Watts, 3.412 = Btuh/Watt
10.3 CALCULATING AIRFLOW CFM
• The formula for calculating airflow using temperature rise and heating BTUH for units
with electric resistance heat is:
Heating BTUH
CFM =
1.08 x Temp. Rise
10.4 CALCULATING CORRECTION FACTOR
• For correction of electric heat output (kW or BTUH) or temperature rise at voltages
other than rated voltage multiply by the following correction factor:
Correction Factor =
11.0 PRE-START CHECKLIST
PRE-START CHECKLIST
m
Is unit properly located, level, secure and service-
YES
m
NO
able?
Has auxiliary pan been provided under the unit with
m
YES
separate drain? (Units installed above a finished
m
NO
ceiling).
m
Is condensate line properly sized, run, trapped,
YES
m
pitched and tested?
NO
m
Is ductwork correctly sized, run, taped and insulat-
YES
m
ed?
NO
m
Have all cabinet openings and wiring been sealed
YES
m
with caulking?
NO
m
YES
Is the filter clean, in place and of adequate size?
m
NO
m
YES
Is the wiring tight, correct and to the wiring diagram?
m
NO
m
YES
Is the unit properly grounded and protected (fused)?
m
NO
m
YES
Is the thermostat heat anticipator been set properly?
m
NO
m
YES
Is the unit circuit breaker(s) rotated properly "on" up
m
NO
- "off" down?
m
Are the unit circuit breaker(s) line lug cover(s) in
YES
m
place?
NO
m
YES
Are all access panels in place and secure?
m
NO
Refer to outdoor unit installation instructions for system
start-up instructions and refrigerant charging instructions.
3.16 x Watts
CFM
2
Applied Voltage
2
Rated Voltage
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