Greenheck Fan EP Switch User Manual

EP SWITCH

9

7

3

2

1

6

4

5

8

Port 3
Exhaust

Port 2

Supply

Port 1

To Actuator

ASCO Solenoid
Valve Assembl y

Red

Red

TOR/RRL
Wiring
Har dware

Solenoid Valve With TOR

Solenoid Valve TOR

Brown
Orange
Black
Blue
Red
Purple
Yellow

Red

Red

Orange

Black

Solenoid Valve With RRL

Solenoid Valve RRL

Red

Red

24 Vdc / 24 Vac / 120 Vac

Application & Design

An electro-pneumatic (EP) switch, also known as a three way solenoid valve, is used to electrically open and close a pneumatic
actuated damper. It is wired in series with a normally closed thermostat when used with a fire smoke damper (FSD) to initiate
closure at elevated temperatures. The EP switch can also be used on a smoke damper (SMD) to initiate closure when required in
a smoke control system.

Assembly

Typical Setup

Input Signal: 24 Vdc

(specify) 24 Vac
120 Vac

Item Qty. Part # Description Kit #

1 1 - Valve 1⁄8" NPT
2 1 - Retaining Clip
3 1 452460 S/V 120 Vac 812441

- 1 380913 S/V 24 Vac 812442

- 1 381042 S/V 24 Vdc 812443
4 1 651371 Mounting Bracket
5 1 380850 2 x 4 x 1.875 Ext. Box
6 2 415555 #10 x 0.50 TEK Screw
7 1 380257 2 x 4 Blank Cover
8 1 415539 #10-32 HH Grounding
Screw (green)
9 1 454850 Label

Kit #s include appropriate voltage solenoid valve shown
under Item 3 and all other Item #s above.

Copyright © 2007 Greenheck Fan Corporation

EP Switch Rev. 3 May 2007