Greenheck Fan Switch WD Series User Manual

Part Number 452723  
End Switch Kit  
For use on WD series Dampers  
Field 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.  
Instructions:  
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 12 in. self-drilling sheet metal screws  
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.  
3
Damper Frame  
Damper  
Tie Bar  
2
12 in.-14 NPSM  
Part # Qty.  
Description  
1
2
1
1
End switch mounting bracket  
3
End switch  
UL/CSA Rating L67  
15 Amps: 125, 250, or 480 VAC  
0.25 Amps: 250 VDC  
0.50 Amps: 125 VDC  
1
Spring Rod  
Damper  
Blade  
3
4
2
2
#6-32NC x 11 in. machine screws with  
nuts (packaged in end switch housing)  
4
End Switch Installation On  
WD-100 Series Dampers  
#10 x 1 in. self-drilling sheet metal  
screws  
Damper Frame  
Damper  
Blade  
Fan or  
Light  
Damper  
Tie Bar  
L
1
L
2
4
N.C.  
N.O.  
3
End  
Switch  
Common  
M
Green  
Spring Rod  
3
Damper  
Actuator  
1
Note: Some actuators are multi-tap, use correct connections per  
actuator wiring diagram.  
2
12 in.-14 NPSM  
Wiring Illustration  
End Switch Installation On  
WD-200 & 300 Series Dampers  
Copyright © 2008 Greenheck Fan Corporation  
#452723 End Switch Rev 3 Aug 2008  
 

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