60
Marvair Wall Mount Heat Pump I&O Manual
06/2023 Rev.7
Calculate Heater kW
Single Phase Units
Heater kW = (HCAL1*L1&L2)/1000 = _______________kW.
Example: HCAL1 * L1&L2
1000
Measured Voltage: L1&L2 = 241 Volts
Measured Amperage: L1 = 20.7 Amps
4988.7 / 1000 = 4.99kW (5kW)
Three Phase Units
Heater kW = (HCAL1*L1&L2) + (HCAL2*L1&L3) + (HCAL3*L2&L3)/1000 = __________kW.
Example: (HCAL1*L1&L2) + (HCAL2*L1&L3) + (HCAL3*L2&L3)
1000
Measured Voltage: L1&L2 = 241 Volts
Measured Amperage: L1 = 8.28 Amps
1995.48
Measured Voltage: L1&L3 = 243 Volts
Measured Amperage: L1 = 8.22 Amps
1997.46
Measured Voltage: L1&L2 = 235 Volts
Measured Amperage: L1 = 8.57 Amps
2013.95
6006.89 / 1000 = 6.01kW (6kW)
Outdoor Thermostat Set Point ODT
Adjust the ODT setpoint to the temperature appropriate for your application (either “Auxiliary Heat”
or “Mechanical Heat Lockout”). If you need assistance selecting the proper temperature contact tour
HVAC system designer responsible for the application. After adjusting the ODT for your application,
the HVAC system will go back to Mechanical Cooling.
Note: The range of the Outdoor Thermostat is
0ºF to 50ºF.
Is the indoor blower motor (IBM) On? .............................................................................
❒
Yes
❒
No
Is the Compressor On? ......................................................................................................
❒
Yes
❒
No
Is the Condenser Fan (CFM) On? (Ambient conditions may be delay CFM) ..................
❒
Yes
❒
No
Is the Heater Off? (Clamp an AmpProbe on one leg of the heater contactor to verify) ...
❒
Yes
❒
No
