The pressure switch can be installed either before or after
the pressure reducer in the distribution piping.
Minimum operating pressure is 50 PSI (3.5 bar)
Description
The pressure switch is operated by the INERGEN
® agent
pressure when the system is discharged. The pressure
switch can be used to open or close electrical circuits to
either shut down equipment or turn on lights or alarms. The
three pole, single throw (3PST) pressure switch is con-
structed with a gasketed, water tight housing. The switch
may be used for 3 phase wiring requirements. The housing
is constructed of malleable iron, painted red. A 1/4 in. NPT
pressure inlet is used to connect the 1/4 in. pipe from the
INERGEN system.
BAKELITE is a trademark of Union Carbide Corp.
System Components
UL EX-4510 2-1-12 Page 1-18.2
REV. 4
Pressure Switch – 3PST
Shipping Assembly
Part No. Description
842344 Pressure switch – 3PST
Component Material Thread Size/Type Electrical Rating Approvals
Pressure Switch Switch: Conduit Inlet: 30A - 240 VAC UL Listed (EX-4510);
3PST BAKELITE 3/4 in. NPT Female 20A - 600 VAC Listed for use with
Housing: Pressure Inlet: 3 HP - 120 VAC
FM Approved systems
Malleable 1/4 in. NPT Female 7.5 HP - 240 VAC
Iron 15 HP - 600 VAC
Piston: 3 PHASE AC
Brass
RESET KNOB
SPRING
HALF ROUND ARM
SNAP LOCK-RING
“O” RING GASKET
PISTON ROD
UNION
SWIVEL NUT
NAMEPLATE
SPRING
HALF ROUND ARM
3/4 IN. NPT
3/4 IN. BRASS
PLUG
HEX BUSHING
3/8 IN. X 1/4 IN.
SECTION “A” – “A”
PISTON ROD
PISTON-SPOT NUT
PISTON
PISTON “O” RING GASKET
BRASS
SWITCH
HOUSING
TOGGLE SWITCH WITH FULLY
ENCLOSED
BAKELITE BASE
MOISTURE-PROOF
GASKET
“A”
000715
“A”
4 – 9/32 IN.
MOUNTING HOLES
5 3/16 IN.
(13.1 cm)
3 7/8 IN.
(9.8 cm)
4 IN.
(10.1 cm)
3 1/16 IN.
(7.7 cm)
3 3/4 IN.
(9.5 cm)
SPACER
ANSUL
®
Copyright © 2012 Tyco Fire Products LP.
All rights reserved.
Form No. F-9326-05
One Stanton Street +1-715-735-7411
Marinette, WI 54143-2542 www.ansul.com
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