Specifications

23.
Nitrogen
Nitrogen cylinders provided by an approved source shall
provide the nitrogen supply. Dry Pilot Line Single Interlock
Preaction System and Wet Pilot Ling Single Interlock or Elec-
tric Actuation Single Interlock Preaction systems desiring a
higher supervisory air pressure, shall only require between
8 and 28 psi (0,6 to 1,9 bar) supervisory pressure for proper
setting of the low pressure pneumatic actuator in accor-
dance with the manufacturer’s instructions. The nitrogen cyl-
inder pressure shall be regulated and supervised through
the use of nitrogen regulating device and low-pressure trim
kit. This device shall consist of a brass, single stage pres-
sure regulator, equipped with high pressure inlet and low
pressure outlet gauges, and ¼” copper connection tubing
with galvanized ¾” x ¼” reducer bushing. Optional: Low-
pressure trim kit shall be included to monitor the regulated
nitrogen supply pressure to provide a low-pressure supervi-
sory alarm. This kit shall include a low-pressure switch with
associated galvanized connection trim. Assembly shall be
a Reliable Nitrogen Regulating Device. This device is to be
used in conjunction with the Reliable Model A-2 Pressure
Maintenance Device.
Optional System Accessories
System Control Valve
Preaction system control valve shall be a slow close, [cU-
Lus Listed] indicating butterfly type valve with a pre-wired
supervisory tamper switch assembly. The valve shall be
rated for a working pressure of [300 psi (20,7 bar)]. System
control valve shall be for a [2” (50 mm)] Gruvlock AN7722-
3A Butterfly Valve or [2½” (65 mm)][3” (80 mm)][4” (100
mm)][6” (150 mm][8” (200 mm] - Nibco GD-4765-8N But-
terfly Valve.
Waterfl ow Alarm Pressure Switch
Alarm pressure switch shall be provided to indicate water
flow and provide a water flow alarm. Pressure switch shall be
[cULus Listed] and of the bellows activated type enclosed
in a weatherproof, 4x, NEMA 4-rated enclosure incorporat-
ing tamper-resistant screws. There shall be two sets of SPDT
(Form C) contacts rated at 10.0 A @ 125/250 VAC and 2.5 A
@ 6/12/24 VDC. The pressure switch shall have a maximum
service pressure rating of 250 psi (17,2 bar) and shall be
factory adjusted to operate at a pressure of 4 to 8 psi (0,27
to 0,55 bar) with adjustment up to 20 psi (1,3 bar). Switch
shall be provided with a 1/2” NPT male pressure connec-
tion. Waterflow alarm pressure switch shall be System Sen-
sor EPS10-2.
Detection System
To operate the solenoid valve on the electric actuation
preaction system, 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
ampere-hour rating, providing [60 hours – cULus Listed]
[90 hours – FM Approved]. Dry contacts shall be provided
for remote annunciation of alarm, trouble, and supervisory
panel signals. Main power supply to be a dedicated a 120
VAC / 60 Hz circuit.
Technical Data
Reliable Single Interlock Preaction Systems, with associ-
ated trim, size 2” (50 mm), 2½” (65 mm), 76 mm, 3” (80 mm),
4” (100 mm), 165 mm, 6” (150 mm) & 8” (200 mm) are rated
for use at minimum water supply pressure of 20 psi (1,4 bar)
and maximum supply pressure of 250 psi (17,2 bar) for 2”
(50mm), 2½” (65mm), 76mm, 3” (80mm) and 8” (200mm)
valve sizes and 300 psi (20,7 bar) for 4” (100mm), 165mm
and 6” (150mm) valve sizes. Water supplied to the inlet of
the valve and to the pushrod chamber must be maintained
between 40°F (4°C) and 140°F (60°C).
The following list of technical bulletins pertains to valves
and devices that may be used in this preaction system:
Deluge Valve Reliable 518/519
Hydraulic Emergency Station (Model A) Reliable 506
Solenoid Valve Reliable 718
Mechanical Sprinkler Alarm Reliable 612/613
Pressure Maintenance Device Reliable 254
Nitrogen Regulating Device Reliable 254
Air Compressor Panel
(Models B-SI & C-SI)
Reliable 254
Releasing/Control Panel Potter #5403550
Pilot Line Detector Reliable 180
Waterflow Pressure Alarm Switch
System Sensor
WFDS51701
Model DDX Deluge Valve Description
1. Rated working pressure:
Valve & System - 250 psi (17.2 bar) for 2” (50mm),
2
1
/
2
” (65mm), 76mm, 3” (80mm) and 8” (200mm)
valve sizes and 300 psi (20,7 bar) for 4” (100mm),
165mm and 6” (150mm) valve sizes.
2. Factory tested to a hydrostatic pressure of 500 psi
(34,5 bar) for 2” (50mm), 2½” (65mm), 76mm, 3” (80mm)
and 8” (200mm) valve sizes and 300 psi (20,7 bar) for 4”
(100mm), 165mm and 6” (150mm) valve sizes. (Valve only)