Reliable N2-Blast DDX-LP PrePaK Instructions For Installation, Operation Care And Maintenance

Instructions for
Installation, Operation,
Care and Maintenance
Note: N2-Blast , Blast-off
®
Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
, and AutoPurge™ are registered trademarks of South-Tek Systems, LLC.
®
Model DDX-LP N2-Blast
Low Pressure Dry Pipe System
2" (50mm), 2-1/2" (65mm),
3" (80mm), 4"(100mm)
Low Pressure Dry Pipe System
8 psi - 24 psi (0.6 bar - 1.7 bar)
System Air/Nitrogen Pressure
General Description
The Reliable Model DDX-LP PrePak with integrated nitro-
gen generation (Sizes 2" (50mm), 2½" (65 mm), 3" (80 mm)
and 4" (100 mm)) is a completely self-contained, supervised
dry pipe system that can be readily installed within a floor
space of less than 7 ft (0.65 m
2
net dimensions. Installation of the DDX-LP PrePak requires
just three piping connections: the water supply, the sprinkler
system and the drain. Reference locations of these piping
connections are shown in Fig. 1. Independent electrical
supplies are required for the optional system air compressor
(115 or 220 VAC) and the nitrogen generator (115 VAC).
Full assembly drawings for the units are available on the
Reliable Automatic Sprinkler Company website (www.reli-
ablesprinkler.com).
The Reliable Model DDX-LP N2-Blast
rates a South-Tek Systems FPS-900 pressure swing adsorp-
tion N2-Blast nitrogen generator, complete with indepen-
®
dent air compressor, nitrogen storage tank, control system,
AutoPurge™. The nitrogen generator is completely wired,
tested, and integrated with the Model DDX-LP PrePak, and
supplies 98% pure nitrogen to the piping network to limit
electrochemical, galvanic, and micro-biologically influenced
corrosion (MIC). Operation and maintenance information
can be found in this bulletin as well as the South-Tek Sys-
tems website (www.southteksystems.com).
The heart of the Reliable Model DDX-LP PrePak is the
Model DDX-LP Dry Pipe Valve. The Reliable Model DDX-LP
Dry Pipe Valve is a hydraulically operated, mechanical valve
designed for use as a primary control valve in a low pres-
sure dry pipe valve system. The trim set used with the Model
DDX-LP Dry Pipe Valve contains the Reliable Model LP Dry
Pilot Actuator releasing device. This Actuator allows the sys-
tem air or nitrogen pressure to be considerably less than the
water supply pressure (see Table A). The following benefits
are a direct result of lower air pressure:
1. In refrigerated area systems, lower air pressure de-
creases the possibility of ice plugs that could impede
or prevent the flow of water to fire sprinkler heads in the
event of fire.
Bulletin 737 August 2020
PrePaK
®
). Refer to Fig. 1 for cabi-
2
PrePak incorpo-
®