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Heatmaster
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G Series Furnace Operating Manual
Set Water Temp is the temperature at which the furnace will
turn off at the end of a heating cycle.
The differential controls how many degrees the water will
lose before the furnace turns on to heat the water.
Oxygen: The target oxygen level in the exhaust stream during
a heating cycle. This affects the bottom damper position.
This timer can be used to keep the coal bed alive during long
idle periods. Once the furnace shuts down at the end of the
heating cycle the initial timer will start (Factory Set Delay - 1
hour and 30 minutes). Once this Delay time has passed the
furnace will start the fan and open the dampers to provide
air to the coal bed for the set On Time (3 Minutes and 0
Seconds). After this first cycle the control will run the On
Time cycle every Off Time (30 minutes and 0 seconds).
When the furnace water cools below this setpoint, it will
assume the firebox is empty and will shut down to conserve
heat.
Opening the smoke by-pass will activate the draft fan for a
maximum of 5 minutes. If more time is needed the by-pass
must be closed and opened again. Operating the smoke by-
pass for extended periods of time may over heat the motor
causing premature failure.
Water, Differential and Oxygen Settings
Idle Timer Settings
Set Low Temperature Shut Down
By-Pass Door Is Open
