Controls And Safety Devices - Heatmaster G Series Operation And Maintenance Manual

CONTROLS AND SAFETY DEVICES

This wood furnace has a manufacturer-set minimum low
burn rate that must not be altered. It is against federal
regulation to alter this setting or otherwise operate this
wood heater in a manner inconsistent with operating
instructions in this manual .
Furnace Control
Your HeatMaster G Series furnace uses a factory-
SS
programmed control to maintain your water temperature
by using an air damper control and draft inducer fan.
The control is located around the corner to the left of
the firebox door and requires no user programming or
changes . The control displays the water temperature in
your furnace, the damper air percentage and any active
alarms .
Note: A timer has been programmed into the control to
fire the furnace for 3 minutes after 90 minutes of idling
and for 3 minutes every 30 minutes after that. This timer
will help to keep your coal bed lit during idle periods.
The timer settings can be adjusted. See the timer settings
section.
Air Damper
The damper air percentage is the amount of air being
drawn through the furnace to stoke the fire. This feature
keeps your furnace burning clean and hot while keeping
your water temperature in the preferred range . The
damper is located beneath the firebox loading door and
is a mechanical part that opens or closes the air injection
port .
Draft Inducer
The draft inducer fan is located at the rear of the furnace
on the top and is used to draw air from the air damper
through the furnace. The fan should be on whenever the
air damper percentage is above 0% or when the smoke
bypass is open.
Smokeless Loading Handle (Optional)
Use the Smokeless Loading Handle whenever the firebox
loading door is open. The bypass handle is located on
the side of the furnace and opens a direct exit out of the
firebox through the chimney whenever pulled towards
the front of the furnace . This will allow you to check your
firebox, fuel and load your furnace without smoke blowing
out of the firebox loading door.
20 Heatmaster G Series Furnace Operating Manual
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Note: Be sure to close the bypass once you have finished
loading the furnace and closed the firebox door. The
control has a timer that will shut the furnace down if the
bypass has been open for 5-minutes.
CAUTION: Do not open any door before opening the
Smokeless Loading Handle . Damage to the furnace and
personal injury may result.
Loading Switch (Base Model)
Unless equipped with a Smokeless Loading Handle,
your furnace has a run switch to make loading safer . If
the furnace is not running when you go to load, turn on
the loading switch . The draft fan will turn on for up to 5
minutes to reduce the smoke spillage while loading .
High Limit Switch
The high limit cut off switch is used to ensure the furnace
does not cause damage via runaway fire. It acts as a
safety switch by cutting power off to the fan if the water
temperature rises above 190 degrees F. If the high limit
switch trips, it will have to cool off to about 140 F before
turning on again .
Alarm LED Light
The LED alarm light is located on the front left corner
of the furnace and will blink red if the furnace smoke
bypass is open, the furnace is low on water or if the water
temperature is too low or too high . It is intended to warn
the user of potential problems.
Cold Start Button
The button is located on the control panel in the top right
corner. Press the button to bypass the low-temperature
function of the control to fire the furnace from a cold start
(First firing the furnace or when the water temperature has
gone low) .