© 2006 GE ECM by Regal-Beloit
- 31 -
Indoor Blower Motors
v0.2
The Humidistat Option
Installation
- Most manufacturers will require the removal of a jumper pin, wire connection
or a dip switch setting change on their control board to allow the use of a
humidistat. This is OEM specific.
- In this application, a high humidity signal from the humidistat will command
the ECM to operate at a lower airflow than the cooling selection (typically a
15% reduction). Airflow will return to normal when the set humidity level is
satisfied.
Benefits
- Lower airflow across the cooling coil will remove more moisture by allowing it
to condense on the coil and drain.
- Lower humidity allows the cooling set point to be higher and still be
comfortable. Setting the thermostat as little as two degrees higher can save
money.
- The cooling call will follow whatever profile has been selected; however the
airflow will be reduced at each step during the dehumidification mode.
Dehumidify
Full
capacity
Off
Delay
Pre-run Short
run
Normal Operation
With Humidistat
DehumidifyDehumidify
Full
capacity
Off
Delay
Pre-run Short
run
Normal Operation
With Humidistat
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