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Sequence of operation
(CoNt’D)
basic Sequence of operation
Following the HVAC systems sequence of operation, the Evergreen IM
will determine its operational speed from the 24VAC thermostat demand
connected to the Low Voltage SIGNAL connections.
The motor will then turn on at that speed only when the HVAC systems fan
controls send 115VAC to the High Voltage SIGNAL connections.
When the thermostat demand ends and the 24VAC is de-energized from the
Low Voltage SIGNAL connections the motor will continue to run at a reduced
speed.
When the HVAC systems fan controls de-energize the 115VAC to the High
Voltage SIGNAL connections the motor will turn off.
Important Note:
The Evergreen IM has numerous built in ramp timings to improve comfort
and decrease the noise associated with changing speeds, turning on and
turning off. The length of these ramps is determined by the HVAC System
demand and if the motor is currently on, off or running constant fan.
The following pages will cover each specific operation. It is important
to understand that a ramp is different than a delay. A delay waits for
a specified amount of time before action. A ramp uses the specified
amount of time to change the motor operation from off to on, on to off
or from one speed to another.
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Evergreen IM manual 01-13.indd 24
2/13/13 11:12 AM
