Vista VAF-24A308I, Owner'S Manual

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Air Handler
7
The heating mode temperature rise is dependent upon the system airflow, the supply voltage,
and the heater kit size (KW) selected. Use Tables 8-10 to determine the temperature rise(ºF).
table 8
CFM
HEATER KIT NOMINAL KW
5 8 10 15 20
600 28 41 56
800 21 31 42
1000 17 25 34 50
1200 14 21 28 42 56
1400 12 18 24 36 48
1600 10 15 21 31 42
1800 9 14 19 28 37
230/1/60 Supply Voltage-Temperature Rise Table ºF
table 9
CFM
HEATER KIT NOMINAL KW
5 8 10 15 20
600 27 39 52
800 20 30 40
1000 16 24 32 48
1200 13 20 27 40 53
1400 11 17 23 34 46
1600 10 15 20 30 40
1800 9 13 18 27 36
220/1/60 Supply Voltage-Temperature Rise Table ºF
table 10
CFM
HEATER KIT NOMINAL KW
5 8 10 15 20
600 25 37 50
800 19 28 38
1000 15 22 30 46
1200 13 19 25 38 56
1400 11 16 22 33 48
1600 9 14 19 28 42
1800 8 12 17 25 37
208/1/60 Supply Voltage-Temperature Rise Table ºF
Note: For installations not indicated above the following formula is to be used:
TR=(kW*3412)*(Voltage Correction)*1.08/CFM
Where:TR=Temperature Rise
KW=Heater Kit Actual kW
3412=Btu per kW
Voltage Correction= 0.96(230 Supply Volts)
0.92(220 Supply Volts)
0.87(208 Supply Volts)
1.08=Constant CFM=Measured Airflow