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EP SWITCH
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
9
7
3
2
1
6
4
5
8
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.
Port 3
Exhaust
Port 2
Supply
Port 1
To Actuator
ASCO Solenoid
Valve Assembly
Red
Red
TOR/RRL
Wiring
Hardware
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
Typical Setup
Copyright © 2007 Greenheck Fan Corporation
EP Switch Rev. 3 May 2007