enteliZONE Sequence of Operations
Page 68 of 84 eZFC-424R4-24 Application Guide
Edition 2.6
Multi-Speed Fans
The behavior of a multiple speed fan running in intermittent mode is described in the following table
and images. Even though the images only describe heat stages, the cooling stages are identical in
behavior.
When a multi-speed fan runs at its lowest speed, Fan1 is on while Fan2 and Fan2 are off.
Heat/
Cooling
Stage
Occupied Mode Unoccupied Mode
Binary
Fan turns on for the duct heating or
cooling stage. Turns off when stage load is
25% to reduce overshoot.
Fan turns on at 100% duct stage
load and turns off when the demand
drops down to 25%.
Analog
Fan turns on at 25% duct stage load and
stays on. Fan turns off when demand
drops to 0%.
Fan turns on at 100% duct stage
load and turns off when the demand
drops down to 0%.
(click to view larger version of image or images)
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