Greenheck Fan WD Series installation instructions End Switch Kit, Part Number, Instructions

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.

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.

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 1⁄2 in. self-drilling sheet metal screws

	3	Damper Frame
Damper		2
Tie Bar

1⁄2 in.-14 NPSM

Part #	Qty.		Description
1	1	End switch mounting bracket				3
2	1	End switch
		UL/CSA Rating L67
		15 Amps:	125, 250, or 480 VAC
		0.25 Amps:	250 VDC	1		Spring Rod
		0.50 Amps:	125 VDC	Damper
3	2	#6-32NC x 11/2 in. machine screws with		Blade		4
		nuts (packaged in end switch housing)
					End Switch Installation On
4	2	#10 x 1/2 in. self-drilling sheet metal
					WD-100 Series Dampers
		screws

Damper Frame

Fan or

Light

L1

L2

	N.C.
End	Common	N.O.
Switch		M
		Green
		Damper
		Actuator

Damper

Blade

Damper

Tie Bar

4

3

Spring Rod

1

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

Wiring Illustration

3

2

1⁄2 in.-14 NPSM

End Switch Installation On

WD-200 & 300 Series Dampers

Copyright © 2008 Greenheck Fan Corporation #452723 End Switch Rev 3 Aug 2008