Tyco Fire Suppression & Building Products ANSUL AQUASONIC, Design, Installation, Recharge, And Maintenance Manual

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System Components
3-1-10 Page 1-20
TYCO FIRE SUPPRESSION & BUILDING PRODUCTS, MARINETTE, WI 54143 Form No. F-2010050 Copyright © 2010 Tyco Fire Suppression & Building Products. All rights reserved.
BAKELITE is a trademark of Union Carbide Corp.
Pressure Switch – 3PST
Description
The pressure switch is operated by the nitrogen agent pres-
sure 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 constructed
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
AQUASONIC system. 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)
Shipping Assembly
Part No.
Description
42344 Pressure switch – 3PST
Component Material Thread Size/Type Electrical Rating Approvals
Pressure Switch Switch: Conduit Inlet: 3/4 in. NPT Female 30A - 240 VAC FM Approved
3PST BAKELITE Pressure Inlet: 1/4 in. NPT Female 20A - 600 VAC
Housing: 3 HP - 120 VAC
Malleable 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