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15
Centrifugal Fan Model Installation
6.
Position Control Box Assembly on top of fan
as shown and mount to top of fan housing
utilizing ¼” x 1.25” Drill Screws (157630).
7.
Drill a 1” hole in scroll of fan housing where indicated for High Limit Switch (2 x 4 box). Remove cover
from Hi Limit Box and mount box to fan housing by positioning Hi Limit into hole and mounting box to
housing with #10 x .75” Drill Screws where indicated. Reinstall cover on Hi Limit Box.
8.
Seal Hi Limit Switch and Temperature and Relative Humidity Sensor (if equipped with heater) holes with
silicone caulk.