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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
ASCO Solenoid
Va lve Assembly
input signal: 24 Vdc
7
9
Port 3
Exhaust
Port 1
Port 2
Supply
To Actuator
(specify) 24 Vac
120 Vac
3
2
8
item Qty.
1
2
3
-
-
4
5
6
7
8
9
Kit #s include appropriate voltage solenoid valve shown
under Item 3 and all other Item #s above.
Solenoid Va lve With RRL
TOR/RRL
Wiring
Solenoid Valve
Har dware
Solenoid Va lve With TOR
Solenoid Valve
Red
Red
Ep switch
24 Vdc / 24 Vac / 120 Vac
6
4
5
part #
Description
1
-
Valve
1
⁄
" NPT
8
1
-
Retaining Clip
1
452460
S/V 120 Vac
1
380913
S/V 24 Vac
1
381042
S/V 24 Vdc
1
651371
Mounting Bracket
1
380850
2 x 4 x 1.875 Ext. Box
2
415555
#10 x 0.50 TEK Screw
1
380257
2 x 4 Blank Cover
1
415539
#10-32 HH Grounding
Screw (green)
1
454850
Label
RRL
Orange
Red
Red
Black
TOR
Brown
Orange
Red
Black
Blue
Red
Red
Purple
Yellow
Copyright © 2007 Greenheck Fan Corporation
1
Kit #
812441
812442
812443
EP Switch Rev. 3 May 2007
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