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14
Centrifugal Fan Model Installation
4.
Assemble Control Box Mounts (224414) to base of Control Box as shown below utilizing ¼”x ¾” Hex
bolts (154003) , ¼” Washers (13368), and ¼” Nylock Nut (157388).
5.
For EQM version of heaters only (Heater Models S224441 and S224443). Proceed to next step for
Thermostat versions (Heater Models S224442 and S224444)
a.
Install Temperature and Relative Humidity Sensor inside control box (sensor will be found inside
box). Sensor will need to be inserted in small hole found in bottom of box. The Sensor Filter,
found at end of sensor, must be removed prior in insertion and then re-attached. Mount sensor to
bottom of box using the three holes and screw provided.
Remove Sensor Filter
Inset Sensor & Reattach Filter
Mount Sensor
b.
Position Control Box Assembly on top of fan as shown and mark location of end of sensor on
scroll of fan housing. Drill 7/8” hole into scroll of housing for sensor. Control Box Assembly will
now be able to mount to top of fan.