TOTALPAC2 Page 3 of 12
TOTALPAC2 Integrated Fire Protection Systems
Mechanical Section - Deluge System
FM-086G-0-24D
f Deluge systems with Hydraulic Release:
.a Alarm Pressure Switch (C1) should activate when
pressurized to 4 to 8 psi (27 to 55 kPa) on pressure
rise. Alarm Pressure Switch (C1) is factory wired to
activate the water flow alarm.
.b Release system piping must not exceed the maximum
elevation allowed for hydraulic release piping above
the Deluge Valve. Refer to technical Data for the
hydraulically operated Deluge Valve used.
.c The water supply to the hydraulic release system must
include a restricted orifice (B3) to ensure that the
priming line cannot replace hydraulic pressure as fast
as it escapes when a releasing device operates.
1.4 System Operation
1.4.1 In the SET condition:
System water supply pressure enters the priming chamber of
the Deluge Valve (A1) through the priming line which
includes a normally open priming valve (B1), strainer (B2),
restricted orifice (B3) and spring loaded check valve (B4) and
the normally open P.S.O.V. (B9).
f Hydraulic Release System: In the SET condition, water
supply pressure is trapped in the priming chamber and
hydraulic release piping by a spring loaded check valve
(B4) and closed releasing devices. The pressure in the
priming chamber holds the Deluge Valve clapper closed,
keeping the outlet chamber and system piping dry.
f Pneumatic release System: In the SET condition, water
supply pressure is trapped in the priming chamber by a
spring loaded check valve (B4) and Pneumatic Actuator
(F3). Pneumatic Actuator is held closed by pressure
maintained in the pneumatic release system. The
pressure in the priming chamber holds the Deluge Valve
clapper closed, keeping the outlet chamber and system
piping dry.
f Electric Release System: System water supply pressure
enters the priming chamber of the Deluge Valve. In the
SET condition, water supply pressure is trapped in the
priming chamber by a spring loaded check valve (B4) and
normally closed Solenoid valve (F1). The pressure in the
priming chamber holds the Deluge Valve clapper closed,
keeping the outlet chamber and system piping dry.
1.4.2 In a fire condition:
f Hydraulic Release System: When a releasing device
operates, water pressure in the hydraulic release system
escapes.
f Pneumatic release System: When a releasing device
operates, pressure in the pneumatic release system
escapes causing the Pneumatic Actuator (F3) to open.
f Electric Release System: When the detection system
operates, system Control Panel activates an alarm and
energizes normally closed Solenoid valve (F1) to open.
Pressure is released from the priming chamber to the open
drain manifold faster than it is supplied through the restricted
orifice (B3). The Deluge Valve clapper opens to allow water
to flow into the system piping and alarm devices, causing the
optional Water Motor Alarm (C2) and water flow alarms
connected to the Alarm Pressure Switch (C1) to activate
Water will flow from all the open sprinklers and/or nozzles in
the system.
When the deluge valve operates, the sensing end of the
PSOV (B9) is pressurized, causing the PSOV to close.
When the PSOV closes, it shuts off the flow of the priming
water pressure to the priming chamber, preventing the
Deluge Valve (A1) from resetting, even if the open releasing
devices close. The Deluge Valve can only be reset after the
system is taken out of service, and the outlet chamber of the
deluge valve and associated trim piping is depressurized and
drained.
1.4.3 Manual operation:
Anytime the handle of the Emergency Release (B10) is
pulled, pressure is released from the priming chamber;
Deluge Valve (A1) will open. Water will flow from any open
sprinklers and/or other opening in the sprinkler piping and
alarm devices (C1 & C2) will operate.
1.4.4 Trouble conditions:
f Hydraulic Release System: If the release system operates
due to mechanical damage or malfunction, the Deluge
Valve will open and water will flow from any open
sprinklers and/or other opening in the sprinkler piping.
f Pneumatic Release Systems: In the event of an air
supply failure and slow leakage of air from the pneumatic
release system, alarms connected to Air Supervisory
Switch (E3) will signal a low air pressure condition.
Failure to restore air supply to the pneumatic release
system will result in the operation of the Pneumatic
Actuator (F3). Pressure is released from the priming
chamber faster than it is supplied through the Restricted
Orifice (B3).
f Electric Release controlled Deluge Systems: If the release
system operates due to mechanical damage or
malfunction, the Deluge Valve (A1) will open and water
will flow from any open sprinklers and/or other opening in
the sprinkler piping.
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