Instruction manual

Single Interlock Preaction System– Electric
Release Trim Engineering Specifi cations
General Description
Preaction system shall be a Single Interlock Preaction
System utilizing a 2” (50mm), 2½” (65mm), 3” (80mm) and
76mm Reliable Model DDX Deluge Valve Deluge valve shall
be a [2” (50mm)][2½” (65mm)][3” (80mm)][76mm] [cULus
Listed][Factory Mutual Approved] hydraulically operated,
differential latching clapper-type valve. Deluge valve con-
struction shall be of lightweight, ductile-iron construction
with “screw in” stainless steel seat and clapper assembly.
Stainless steel seat shall have O-ring seals to resist leak-
age and corrosion. Clapper facing shall be pressure actu-
ated, providing a limited compression seat for the sealing
force between the clapper rubber facing and the valve seat.
Deluge valve shall have an external reset knob for reset-
ting the clapper without requiring the removal of the valve
face plate. Push-rod chamber design shall consist of a
stainless steel piston/ push-rod and spring assembly with
diaphragm seal secured to the casting through a push-rod
guide constructed of a synthetic engineering plastic to re-
sist corrosion. Casting shall have a bleeder hole located on
the pushrod chamber for air/water leakage indication. Trip
ratio shall be approximately a 3:1 force differential. Deluge
valve shall be of the straight through design to minimize fric-
tion loss. Deluge valve shall be activated by [hydraulic wet-
pilot][low pressure, pneumatic dry-pilot][electric] actuation
trim. Inlet restriction orifice shall be factory installed into the
inlet port of the deluge valve push-rod cover plate and not
be a separate part of the deluge valve trim. End connection
style to be [2” (50mm), 2½” (65mm), 3” (80mm) or 76mm]
grooved inlet and grooved outlet,per ANSI/AWWA C606.
Deluge valve shall have a rated working pressure of 250 psi
(17,2 bar) and shall be factory hydrostatic tested at 500 psi
(34,5 bar). Deluge valve to be [2” (50mm)][2½” (65mm)][3”
(80mm)][76mm] Reliable Model DDX Deluge Valve (Bulletin
513).
Preaction electric release trim shall consist of galvanized
and brass components specifically listed/approved with
the deluge valve. Deluge valve releasing device shall be an
electrical two-way, normally closed, pilot operated solenoid
valve [cULus Listed] [FMApproved] for its intended use.
The solenoid valve shall be constructed of a brass body
with stainless steel sleeve tube, springs, stop and plunger,
and with ½” female NPT end connections. Solenoid valve
shall have a maximum working pressure of [175 psi (12,1
bar)] [250 psi (17,2 bar)] and maximum ambient tempera-
ture rating of 150°F (66°C). Power consumption of integrated
coil shall be limited to [10watts (175 psi (12,1bar)) Rated]
[22watts (250 psi (17,2 bar)) Rated] and require 24 VDC
from a releasing/control panel listed for such service. Sole-
noid valve shall be a Skinner ½” normally-closed solenoid
valve, [Model 73218BN4UNLVNOC111C2 (175 psi (12,1
bar)) Rated]. [Model 73212BN4TNLVNOC322C2 (250 PSI
(17,2 bar)) Rated].
Supervisory Air Supply Options
Owner’s Air supply
Single interlock preaction system air pressure shall utilize
low supervisory air pressure. Air supply shall be provided
by an owner supplied air system in conjunction with a [cU-
Lus Listed] [FM Approved] automatic low air pressure main-
tenance device. The pressure maintenance device trim as-
sembly shall consist of a field adjustable, low pressure line
regulator, air filter assembly, low air pressure switch, pres-
sure gauge and check valve. Regulator shall be capable
of receiving 40 to 100 psi (2,8 to 6,9 bar) inlet pressure and
provide approximately 2 psi (0,14 bar) outlet supervisory
pressure. The pressure switch shall have a SPDT contact
rated at 15 amp @ 125/250 VAC, and 10 amp @ 12 VDC.
Pressure switch shall transfer contacts when the supervisory
pressure falls below approximately 0.5 psi (0,03 bar).
Low Pressure Air Compressor Panel
Preaction system supervisory air supply shall be a [cU-
Lus Listed] [FM Approved] self-contained, low pressure
air compressor panel containing a 1/16 hp air compressor,
DPDT relay for remote supervisory annunciation, low pres-
sure warning light, pressure gauge, and low pressure alarm
switch. Pressure switch shall control the compressor, pro-
viding a maximum operating supervisory pressure of 2 psi
(0,14 bar), and a low-pressure supervisory alarm at approxi-
mately 0.5 psi (0,03 bar). Power requirements shall be 120
VAC/60 Hz.
Optional System Accessories
System Control Valve
Preaction system control valve shall be a slow close, [cU-
Lus Listed] [FM Approved] indicating butterfly type valve
with a pre-wired supervisory tamper switch assembly. The
valve shall be rated for a working pressure of [175 psi (12,1
bar)] [250 psi (17,2 bar)]. System control valve shall be a
[2” (50mm)] Nibco KG-505-W-8 Ball Valve, [2½” (65mm)] [3”
(80mm)] Nibco GD-4765-8N Butterfly Valve.
Detection System
To initiate actuation of the preaction system’s deluge valve,
a supplemental electric detection system shall be provided
[Insert applicable product specification]
Releasing/Control Panel
A releasing/control panel shall be used to operate the
preaction system. The releasing/control panel shall be a
conventional, microprocessor-controlled panel containing
two initiating device circuits, and waterflow and supervisory
inputs. Output circuits shall include alarm, waterflow, super-
visory, and releasing circuits. The releasing/control panel
shall be capable of providing any of the following desired
modes of operation: single hazard, two zone; single hazard,
cross-zoned; dual hazard, combined release; and dual haz-
ard, split release (two area). Releasing/control panel shall be
equipped with a local tone alarm to annunciate loss of AC
power, system trouble, circuit trouble, and low auxiliary DC
power supply. Panel shall be [cULus Listed] [FM Approved]
and be capable of providing power for compatible detectors
and auxiliary devices used. Audible alarms shall be able to
be silenced at releasing panel. Auxiliary DC power supply
shall consist of (2) 12-volt lead acid batteries of the same
9.