Greenheck MP-100 Installation Manual

Damper Frame

⁄2 in.-14 NPSM

Damper Blade

Damper Tie Bar

Damper Frame

⁄2 in.-14 NPSM

Damper Blade

Damper Tie Bar

Spring Rod

Damper Frame

⁄2 in.-14 NPSM

Damper Blade

Damper Tie Bar

Spring Rod

Part Number 452723

Common

End

Switch

Green

Fan or

Light

N.C.

N.O.

Damper

Ac tua tor

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.

Part # Qty. Description

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 1½ in. machine screws with

nuts (packaged in end switch housing)

4 2 #10 x ½ in. self-drilling sheet metal

screws

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

End Switch Installation On

WD-100 Series Dampers

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

Wiring Illustration

End Switch Installation On

WD-200 & 300 Series Dampers

#452723 End Switch Rev 3 Aug 2008