Greenheck Vari-Green Motor (IOM 473681) - Manual (Page 9)

9 Vari-Green Motor and Controls
Motorized Backdraft
Damper Control
The available factory mounted transformer
(PN 385253) has the ability to signal a
motorized back draft damper to open/close
as the motor starts/stops.
A N.O./N.C. set of contacts is provided
which will change state when above or
below a control voltage of 1.85 VDC. See
wiring diagram for example.
Contact Rating:
• 10A @ 24-240 VAC
• 5A @ 30 VDC
Fans Where Dial on Motor
is Not Accessible
A control is available to mount on the outside of a fan
where the dial on motor may be difficult to access
(model SQ). This control is powered by the line voltage
entering the fan and will send 24VDC and 0-10 VDC to
the motor. Control Part Number is 385611
Factory Wiring
Field Wiring
FACTORY MOUNTED
SPEED CONTROL
Input: 85-265VAC
Output: 24VDC, 0-10VDC
Voltage
Present
COM 24V 0-10V
Red Black
*
White
115/230 VAC Input
to match motor name plate
®
* NOTE: Black wire not
used on some motors
2 x 4
Junction
Box
Motorized Damper
Motorized damper operation
with Vari-Green ® Control
(Motor/control wiring omitted for clarity)
To control
To motor
Green indicator light
—Power present
Control Motor Auxiliary
Contact
Trip Point = 1.85VDC
Contact Rating:
10A @ 24-240VAC
5A @ 30VDC
FACTORY MOUNTED
TRANSFORMER
N.C. COM N.O. COM 24V 0-10V COM 24V 0-10V
Neutral Line
(Damper Power Source)
®