Reliable N2-Blast DDX-LP PrePaK, Инструкции по установке, эксплуатации, уходу и обслуживанию

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2.
2. Lower air pressure allows for smaller capacity, lower cost
dehydration equipment, where required.
3. Lower air or nitrogen pressure can reduce water delivery
time when the system actuates, and in some cases, may
eliminate the need for an accelerator.
4. For systems supplied with nitrogen, low supervisory pres-
sure reduces the quantity of nitrogen required to maintain
the system pressure.
The Model DDX-LP PrePaK system is initially pressurized with
air provided by the factory-installed air compressor. Superviso-
ry pressure is provided and maintained by the integral nitrogen
generator and is monitored by a system pressure switch.
Note: Compressed air is not to be considered dry air and
may contribute to internal corrosion of piping, and/or ice plugs
in system piping. The factory-installed air compressor should
be utilized for initial fill only and make-up air only when the nitro -
gen generator is not active.
When a fire sprinkler operates, there will be a loss of air or Ni -
trogen pressure in the sprinkler system piping which will cause
the Model LP-Dry Pilot Actuator to open. The opening of this
device allows the Model DDX-LP valve to flow water into the
system piping.
A Model B Hydraulic Manual Emergency Releasing station
is standard equipment in the Reliable DDX-LP PrePaK system.
It consists of an aluminum nameplate mechanically attached
to a ball valve. The valve handle in its OFF position is guarded
against accidental turning to the ON position (and system dis-
charge) by a nylon cable tie provided with the DDX-LP PrePaK
system assembly. The cable tie is designed to allow, in case of
an emergency, forceful turning of the valve handle to the ON
position.
Approvals
• The Model DDX-LP N2-Blast PrePaK dry-pipe system
is FM Approved as a factory-assembled Dry-pipe Sys-
tem to Approval Standard 1011/1012/1013, Deluge
and Preaction Sprinkler Systems.
• The Model DDX-LP dry-pipe valve and trim are FM Ap-
proved and cULus Listed.
• The South-Tek N2-Blast® Model FPS-900-RS nitrogen
generator is FM Approved to Approval Standard 1035,
Nitrogen Generators for Corrosion Mitigation.
Technical Data
1. The Reliable Model DDX-LP PrePaK system is rated for
a minimum water supply pressure of 20 psi (1.4 bar).
The 2”, 2-1/2”, 3”, and 8” sizes are rated for a maximum
pressure of 250 psi (17.2 bar), and the 4” and 6” sizes
are rated for a maximum pressure of 300 psi (20.7 bar).
Water temperature must be maintained between 40°F
and 140°F (4°C and 60°C).
2. Friction loss, expressed in equivalent length of Schedule
40 pipe and based on Hazen-Williams Formula is:
System Size Equivalent Length
2” (50 mm) 19.4 ft (1.3 m)
2½” (65 mm) 24.5 ft (1.8 m)
3” (80 mm) 28.9 ft (3.8 m)
4” (100 mm) 32.8 ft (17.7 m)
The equivalent length in the table above includes the Mod-
el DDX-LP valve, supply manifold tee, supply side control
valve, and the section of pipe above the Model DDX-LP
valve.
3. Shipping Weight:
System Size Weight
2” (50mm)
950 lbs (431 kg) 2-1/2” (65mm)
3” (80mm)
4” (100 mm) 1075 lbs (488 kg)
4. Refer to Figure 1 for dimensions.
The following is a list of Technical Data Bulletins which de-
scribe the valves and devices which are used in the system:
Device
Reliable Bulletin #
(unless otherwise noted)
Model DDX Deluge Valve Reliable Bulletin 519
Model DDX-LP Dry Pipe System Reliable Bulletin 338
Low Air Pressure Switch Potter, 5401564
Alarm Pressure switch Potter, 5400928
Installation Requirements
The automatic sprinklers utilized with the DDX-LP PrePaK
system must be UL and/or ULC Listed or FM Approved, as
applicable.
The steel enclosure and all the interconnecting piping must
be located indoors in a readily visible and accessible location
and in an area that can be maintained at a minimum tempera-
ture of 40°F (4°C).
Note: Heat tracing is not permitted. The
Model DDX-LP PrePaK system operation is controlled by the
Model LP Dry Pilot Actuator. The introduction of moisture into
the system piping exposed to freezing temperatures can cre-
ate ice blockage, which could prevent proper system operation.
As a minimum, the air supply should be taken from the area
of lowest temperature within the protected area. The air sup-
ply system must be carefully designed to prevent plugging by
frost deposits. Special requirements, such as those in FME&R
“Installation Guidelines for Refrigerated Storage” may need to
be incorporated.
Optional Seismic Kit
Reliable part number 6501200041 (25” x 28” cabinet for 2”
-4” systems without nitrogen generator) and 6501200042 (30”
x 33” cabinet for 6” and 8” systems, and all units with nitrogen
generator) are seismic upgrade kits required to make the Re-
liable PrePaK OSHPD compliant. One kit is required for each
PrePaK (reference Caution Sheet 331).