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Fan Speed Adjustment – located in the hinged cover low voltage compartment and on the divider is a
plastic shaft knob which allows for fine tuning the fan speed. If you do not need full CFM for your
application and desire a larger temperature rise, the lower factory default set speed may be adequate.
However, you must realize the CFM must maintain the appropriate requirement for balancing the building
inlet to the outlet mechanical driven air.
NOTE: Factory default setting is low, full clockwise. To increase speed turn dial counter-
clockwise.
COMMENT: The fan low speed is approximately 120 CFM.
Green LED – on control board.
Full on = low voltage present and okay, micro controller is functioning, etc.
Two pulses = bad outlet temperature sensor.
Three pulses = control hi-limit open.
R to W closed contact – external switch device.
Fan is running.
Inlet damper is opening and held open.
- Inlet damper is spring close.
Disconnected or bad detected sensor – LED will show two pulses.
07/30/2019
Basic Setup
Operational Indicators
10
EI917
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