Reliable DDX PrePaK Instructions For Installation, Operation Care And Maintenance

Instructions for
Installation, Operation,
Care and Maintenance
10 PSI (0.7 bar) Pneumatic Supervising Pressure
Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Model DDX PrePaK™,
Type D Preaction System
2" (50mm), 2-1/2" (65mm), 3"
(80mm), 4"(100mm),
6" (150mm) & 8" (200mm)
Single Interlock - Electric Release
Double Interlock - Electric/Electric Release
General Description
The Reliable Model DDX PrePaK system is a completely self-con-
tained, supervised preaction system that can be readily installed
within a floor space of 4.7 ft
2
systems, and 6.5ft (0.60m ) for the 4", 6", and 8" systems (not in-
2 2
cluding door swing). Installation of the PrePaK system (not includ-
ing exterior devices, i.e., detectors and alarm bells) requires three
piping connections: the water supply, the sprinkler system, and the
drain. Reference locations of these piping connections are shown
in Fig.1. Two electrical supply connections are required. Note: The
Model DDX PrePaK system is available with an optional 115V VAC
(60Hz) air compressor and an optional Potter Model PFC-4410-RC
Releasing/Control panel wired for a 120 VAC (50Hz) or 220 VAC
(50/60Hz) power supply.
Full assembly drawings for the units are available on the Reli-
able Automatic Sprinkler Company website (www.reliablesprinkler.
com).
The Reliable Model DDX PrePaK system utilizes an optional Potter
Model PFC-4410-RC Releasing Control Panel. This fully program-
mable, microprocessor-based releasing panel is Underwriters Lab-
oratories, Inc. Listed and is in compliance with NFPA 13 and NFPA
72. The PFC-4410-RC is totally zone and output programmable
such that the Reliable Model DDX PrePaK system can be utilized
in many different preaction applications without having to rewire
any of the factory installed devices. Once the previously described
connections are completed, the 24 VDC detectors, output devices,
and relay contacts may be connected to achieve the desired sys-
tem implementation.
The Model DDX Type D PrePaK system can be used in both sin-
gle and double interlock applications. Reliable Single and Double
Interlock Preaction Systems are designed for water sensitive areas
that require protection from inadvertent water flow into the sprinkler
system piping.
The major benefits of a single/double interlock preaction System,
when compared with a wet pipe system, are as follows:
A. A fire alarm sounds prior to the flow of water from a sprinkler,
which may enable extinguishing the fire by handheld means
before the operation of any sprinkler occurs.
B. An annunciator signals whenever the integrity of piping or
sprinklers is accidentally or intentionally disturbed; however,
no water flow occurs unless the detection system has been
activated .
Bulletin 733 January 2021
(0.43 m ) for the 2", 2-1/2", and 3"
2