FloAire FAV-M - Manual (Page 26)

26
TEMPERATURE CONTROL SYSTEMS
401M
•
The 401M replaces building-exhaust air with tempered make-up air.
•
A discharge-sensing controller that compensates for intake air temperature changes modulates
the burner flame.
•
A manual, remote SUMMER/OFF/WINTER selector switch controls the unit’s operation.
o Summer: blower only operation.
o Winter: blower and burner operation.
402M
•
The 402M is used primarily in door-heater applications. Its space override and low-limit
thermostat raise the discharge-air temperature when needed to maintain temperature in loading
dock areas.
•
A discharge sensor and remote controller modulate the burner flame to heat loading-dock door
areas.
•
A space thermostat overrides the set-point and increases the discharge-air temperature if warmer
air is needed in the total area.
•
A manual, remote SUMMEROFF/WINTER selector switch controls the unit’s operation.
o Summer: blower only operation.
o Winter: blower and burner operation.
403M
•
The 403M replaces building-exhaust air and maintains a constant space temperature.
•
A modulating space thermostat adjusts the burner to maintain the supply-air temperature
necessary to compensate for changes in the building heat losses and gains.
•
High- and low-discharge controllers limit the maximum and minimum temperature of the supply
air the unit delivers.
•
A manual, remote SUMMER/OFF/WINTER selector switch controls the unit’s operation.
o Summer: blower only operation.
o Winter: blower and burner operation.
404M
•
The 404M replaces building-exhaust air and maintains a constant space temperature, day or
night. During day operation, a modulating-space thermostat adjusts the burner to maintain the
supply-air temperature necessary to compensate for changes in building heat losses and gains.
•
High- and low-discharge controllers limit the maximum and minimum temperature of the supply
air the unit delivers.
•
During night operation, a space thermostat cycles the unit ON or OFF to maintain the space
temperature. The high-discharge sensor controls the discharge temperature during the night
cycle.
•
The unit’s operation is controlled by a manual remote SUMMER/OFF/WINTER selector switch.
o Summer: blower-only operation.
o Winter: blower and burner operation.
•
The electronic time clock changes the space-temperature control from the day thermostat to the
night thermostat.