Greenheck WD Series Installation Instructions

These instructions apply to the field
installation of end switch kits on Greenheck
model WD Backdraft Dampers. These end
switch kits can be used in conjunction
with MP-100, MP-200, and MP-300 Series
actuators.
End switches are typically wired to a fan
and/or to a light serving as an open/not open
indicator. When the damper is powered open,
one of the damper blades makes contact with
the spring rod of the end switch which in turn
makes a connection allowing power to flow to
the fan and/or light. This set up would be used
when it is desirable to ensure that the damper
is fully open before the fan starts.
Part # Qty.
1 1 End switch mounting bracket
2 1 End switch
UL/CSA Rating L67
15 Amps: 125, 250, or 480 VAC
0.25 Amps: 250 VDC
0.50 Amps: 125 VDC
3 2 #6-32NC x 11/2 in. machine screws with
nuts (packaged in end switch housing)
4 2 #10 x 1/2 in. self-drilling sheet metal
screws
3
Damper Frame
Fan or
Light
N.C.
End N.O.
Common
Switch
1

Wiring Illustration

Note: Some actuators are multi-tap, use correct connections per
actuator wiring diagram.
Wiring Illustration

Instructions:

Description
2
⁄ in.-14 NPSM
1
2
L 1
L 2
3
M
Green
Damper
Actuator
Spring Rod
4
1. Position end switch such that the back side of damper blade trips
the spring rod.
2. Mount end switch bracket to damper frame or ductwork using
#10 x 1 ⁄ in. self-drilling sheet metal screws
2
3
Damper
Tie Bar
Damper
Blade
End Switch Installation On
WD-100 Series Dampers
Damper
Tie Bar
3
1
End Switch Installation On
WD-200 & 300 Series Dampers

Part Number 452723

End Switch Kit
For use on WD series Dampers
Field Installation Instructions
Damper Frame
2
1
4
Damper Frame
2
1 ⁄ in.-14 NPSM
2
Copyright © 2008 Greenheck Fan Corporation
#452723 End Switch Rev 3 Aug 2008
⁄ in.-14 NPSM
1
2
3
Spring Rod
Damper
Blade
4
Spring Rod
3