Drolet HEATMAX II DF01001 Installation And Operating Instructions Manual page 38

HeatMax II Furnace Installation and Operation Manual
Figure 1
When the wood furnace receives the signal from the existing furnace's thermostat calling
for heat, it will disconnect the damper motor, sending the wood furnace in low burn until
the call for heat from that thermostat is satisfied.
After the existing furnace's thermostat is satisfied, the wood furnace will return under the
control of its own thermostat.
Use in thermostat mode
To ensure proper operation of the air inlet damper while connected to a thermostat, the
manual control switch must be maintained in the closed position. However, when a
thermostat is connected to the furnace, it is still possible to use the manual control switch
to open the air damper if desired. Even though you chose to control the furnace with a
thermostat it is still possible to use the manual control switch to open the air intake damper
if desired.
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