Reliable DDX - System Design and Requirements; System Design Considerations; System Air Pressure Requirements; System Electrical Requirements

7.
Hydrostatically testing the valve and trim to pressures
higher than their rating is limited to the hydrostatic
test as referenced by NFPA 13. It does not address the
occurrence(s) of a “water hammer” effect, which can in-
deed damage the valve. A “water hammer” in the water
supply piping of the valve can create pressures in ex-
cess of the rated pressure and should be avoided by all
necessary means. This condition may be created from
improper re pump settings, underground construction
work, or an improper venting of trapped air in the water
supply piping.
System Design Considerations
The automatic sprinklers, wet pilot line detectors, and sig-
naling devices which are utilized with the Wet Pilot Line Single
Interlock Preaction System must be UL or ULC Listed, as ap-
plicable.
The automatic sprinklers, air compressor, releasing devices,
electric releasing control equipment, re detection devices,
manual pull stations, and signaling devices which are utilized
with the Electric Actuation Single Interlock Preaction System
must be UL or ULC Listed or FM Approved, as applicable.
The automatic sprinklers, air compressor, releasing devices,
electric releasing control equipment, re detection devices,
manual pull stations, and signaling devices which are utilized
with the Dry Pilot Line Single Interlock Preaction System must
be UL or ULC Listed, as applicable.
The Deluge Valve, and all interconnecting piping must be
located in a readily visible and accessible location and in an
area that can be maintained at a minimum temperature of 40°F
(4°C). Note: Heat tracing is not permitted.
Pendent sprinklers, other than dry pendents, used on preaction
systems shall be installed on return bends per NFPA 13.
For Electric Actuation Single Interlock Preaction Systems, the
solenoid valve must be operated and the system supervised by
a listed releasing control panel.
In Wet Pilot Line Single Interlock Preaction Systems, the wet
pilot line is only a detection system and does not contribute to
controlling the re. Wet pilot line installation is subject to the fol-
lowing restrictions:
a. It is not to be installed in an area subject to freezing.
b. It is not to be installed in an area where temperatures
in excess of 150°F (65°C) are anticipated.
c. NFPA 72 or the authority having jurisdiction should be
consulted for spacing and elevation requirements.
d. Maximum wet pilot line length and height must comply
with data provided in Fig. 2.
For Dry Pilot Line Single Interlock Preaction Systems, the
detector must be installed only in an upright position.
System Air Pressure Requirements
For Wet Pilot Single Interlock Preaction Systems and
Electric Actuation Single Interlock Preaction Systems, a
Reliable Model B-SI Air Compressor Panel or Reliable Model
C-SI Air Compressor Panel can be used to maintain the system
air pressure at approximately 7 psi (0.5 bar). The air compres-
sor panels contain an integral low air pressure warning light.
In some circumstances, such as when dry sprinklers are be-
ing used in a preaction system, it may be desirable to super-
vise the preaction system at air pressures higher than 7 psi
(0.5 bar). For such cases, Reliable recommends the use of a
tank-mounted compressor and the Reliable Model A Pressure
Maintenance Device. Supervising pressure may be between 7
psi and 20 psi (0.5 and 1.4 bar).
For Dry Pilot Line Single Interlock Preaction Systems, a
Reliable Model A Pressure Maintenance Device can be used
to maintain the pneumatic pressure of both the Dry Pilot Line
of detectors and the re sprinklers to the values shown in Table
A. The values listed in the table represent the necessary ranges
of pneumatic pressure required to keep the Model LP Dry Pilot
Line Actuator in the closed position for a given water supply
pressure.
Table A
Water Pressure
psi (bar)
Pneumatic Pressure to be Pumped
into Sprinkler System psi (bar)
Maximum Not Less Than Not More Than
20 (1.4)
30 (2.1)
50 (3.4)
75 (5.2)
100 (6.9)
125 (8.6)
150 (10.3)
175 (12.1)
200 (13.8)
225 (15.5)
250 (17.2)
275 (19.0)
300 (20.7)
8 (0.6)
10 (0.7)
12 (0.8)
13 (0.9)
15 (1.0)
16 (1.1)
17 (1.2)
18 (1.2)
19 (1.3)
21 (1.4)
22 (1.5)
23 (1.6)
24 (1.7)
10 (.7)
14 (1.0)
16 (1.1)
17 (1.2)
19 (1.3)
20 (1.4)
21 (1.4)
22 (1.5)
23 (1.6)
25 (1.7)
26 (1.8)
27 (1.9)
28 (1.9)
Note: During system set-up, a higher pneumatic pressure
may be required in order to properly set the Model LP Dry
Pilot Line Actuator.
Whenever multiple systems area supplied by a common air
or nitrogen source, each system must have its own pressure
maintenance device for individual maintenance of pressure
(NFPA 13, 7.2.6.5).
System Electrical Requirements
When Using the Electric Actuation Single Interlock Preaction
System, all releasing, alarm and detection devices in the Single
Interlock Preaction System may be supervised by the Potter
PFC-4410-RC Releasing Control Panel. The panel should be
set to use Program #6 for single zone detection or Program
#7 for cross-zone detection (See Potter Instruction Manual
#5403550).
The power supply, the standby emergency power supply, bat-
tery charger, and the rectier circuitry are all contained within
the Potter PFC-4410-RC Releasing Control Panel. The solenoid
valve is operated and supervised by the Potter PFC-4410-RC
Releasing Control Panel. Potter PFC-4410-RC Releasing Con-
trol Panel requires 120 VAC. Batteries that provide ninety hours
of standby power are required for Factory Mutual Approved
systems.
Note:
In order for the solenoid valve to maintain Reliable’s warranty
it must remain sealed as it came from the factory. If there are
concerns about the valve’s internal components, immediate
replacement is recommended.