Unit Maintenance
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IM 1287-4 • REBEL APPLIED ROOFTOP
Electric Furnace Sequence of Operation
Figure 166: Electric (Signal 1) 200 MBH, 100:1
The electric heater should be activated as the first source
of heat and modulate to maintain the heating discharge air
temperature setpoint (for heating) or the cooling discharge
air temperature setpoint setpoint (for minimum discharge air
temperatures). If the electric heater reaches 100% capacity
and cannot meet the discharge air setpoint, the electric heaster
is shut off and the gas furnace is brought on at minimum fire.
The electric heater continues to run at 100% until the furnace
command has been given for 60 seconds. If the gas furnace
reaches minimum fire for a heating stage timer and over shoots
the heating discharge air temperature setpoint, the gas furnace
is shut off and the electric heater is activated and modulated to
maintain the discharge air temperature setpoint.
Figure 167: Electric (Signal 2) 200 MBH, 100:1
The electric heater should be activated as the first source
of heat and modulate to maintain the heating discharge air
temperature setpoint (for heating) or the cooling discharge
air temperature setpoint setpoint (for minimum discharge air
temperatures). If the electric heater reaches 100% capacity
and cannot meet the discharge air setpoint, the electric heaster
is shut off and the gas furnace is brought on at minimum fire.
The electric heater continues to run at 100% until the furnace
command has been given for 60 seconds. If the gas furnace
reaches minimum fire for a heating stage timer and over shoots
the heating discharge air temperature setpoint, the gas furnace
is shut off and the electric heater is activated and modulated to
maintain the discharge air temperature setpoint.
Summary of Contents for Rebel Applied DPSA
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