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Operation
Heating/Cooling
When the room thermostat calls for heat from the
water heater, it activates a circulation pump locat-
ed inside the Air Handler. This pump delivers hot
water through the furnace coil and back to the
water tank/boiler. Simultaneously, the furnace
blower switches on to high speed and will start
circulating air across the coil, which picks up heat
and delivers it to the rest of your home.
Once the thermostat's temperature is reached,
the pump will shut off, and the blower will return
to its pre-set speed or off.
Note: When the furnace blower is left running on
low speed, the air in the home circulates continuous-
ly. When the heat is called for, the blower will
automatically switch to a higher speed. After the
required hot air has been delivered, the blower will
switch back to low speed.
When the thermostat calls for cooling (optional A
coil and condensing unit required) the furnace
blower activates to high speed and the outdoor
condenser unit is energized. After the thermostat
temperature is reached, the condensing unit will
shut off, and the blower will return to it’s continu-
ous setting. Continuous low speed can be
selected by a qualified electrician.
Optional Circulation Timer Models
Some models are equipped with a circulation
timer. It is normal operation for these models to
automatically run the circulation pump for a short
period of time intermittently.
Continuous Low Speed Hook Up
Continuous low speed can be selected by con-
necting the red wire from the blower to the N/C
contact on the relay as indicated on the wiring
diagram.