Reliable DDX PrePaK, Инструкции по установке, эксплуатации, уходу и обслуживанию

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2.
General Description
The Reliable Type F Model DDX PrePaK (Sizes 2” (50
mm), 2½” (65 mm), 3” (80 mm), 4” (100 mm), 6” (150 mm)
and 8” (200 mm) is a completely self-contained, supervised
preaction system that can be readily installed within a floor
space of less than 7.5 square feet ( 0.70 square meters)
(not including door swing). Refer to Fig. 1 for cabinet dimen-
sions. Installation of the PrePaK (not including exterior devic-
es, i.e., detectors and alarm bells), requires just three piping
connections. These connections are the water supply, the
sprinkler system and the drain. Reference locations of these
piping connections are shown in Fig. 1. Also, two 120 / 220
VAC electrical power connections are required.
Note:
The
Type F Model DDX PrePaK is available with its air compres-
sor and releasing/control panel wired for a 120 VAC / 60Hz
or for a 220 VAC / 50 Hz power supply.
Figures 15, 16, and 17 in this Bulletin identify standard and
optional equipment available in Reliable DDX PrePak, Type
F, Preaction Systems.
The Reliable Type F PrePaK utilizes an optional Potter
Model PFC-4410-RC Releasing/Control Panel. This fully
programmable, microprocessor-based releasing panel is
Underwriters Laboratories, Inc. Listed and is in compliance
with NFPA 13 and NFPA 72. Because the PFC-4410-RC is
totally zone and output programmable, the Reliable Type
F PrePaK can be utilized in many different preaction appli-
cations 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 system
implementation.
The Type F PrePaK is designed specifically for double
interlock applications. Reliable double interlock preaction
systems are designed for water sensitive areas that require
protection from inadvertent water flow into the sprinkler sys-
tem piping.
The major benefits of a 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 extinguishment of
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 at that
time.
C. Detection and notification of a fire condition are
provided by fire detectors, without the delay as-
sociated with water delivery time in the event of
a fire. Note that with a wet pipe system, the fire
alarm is delayed until after water has begun flow-
ing from and operated sprinkler.
To flow water into the system piping of a Type F double
interlock preaction system, two events must take place:
1) A fire detection device must detect heat and/or
smoke thereby causing the releasing/control panel
to energize the normally-closed solenoid valve.
2) The sprinkler system piping must be purged of its su-
pervisory air sufficiently enough for the Model LP Dry
Valve Actuator to operate. This purging is usually
caused by the operation of an automatic sprinkler.
In the event that the system piping is ruptured, or a sprin-
kler head is accidentally opened, the Model LP Dry Valve
Actuator will open and a low system air pressure alarm will
sound. The Model DDX Deluge Valve, however, will not be
released to flow water since the solenoid valve still remains
closed. The same end result would occur if a fire detection
device was falsely operated. The releasing/control panel will
activate an alarm, but the Model DDX Deluge Valve will not
flow water due to the fact that the Model LP Dry Valve Actua-
tor still remains closed.
When using the Reliable Type F PrePaK, in double inter-
lock applications, the sprinkler system is pressurized (su-
pervised) with air provided by the optional factory-installed
air compressor (or on-site Nitrogen supply) and is monitored
by a system pressure switch. If Nitrogen is used as the su-
pervisory gas, an optional Nitrogen Kit is available. This kit
contains a regulator and an additional pressure switch that is
used to monitor any low pressure conditions that may arise
due to having a limited Nitrogen supply. Also, a “Low Nitro-
gen” LED is mounted onto the door of the releasing/control
panel for visual confirmation. When using Nitrogen, the pri-
mary supervisory gas should be the Nitrogen (not standard
air) due to dryness concerns (i.e. freezing conditions). The
optional factory-installed air compressor should be utilized
merely for make-up air until the Nitrogen supply can be re-
plenished.
Note:
This compressor supplied make-up air is
not to be considered as dry air and may create ice plugs or
freezing conditions in the sprinkler system piping.
A Model B Hydraulic Manual Emergency Releasing station
is standard equipment in the Type F PrePaK. It consists of an
aluminum nameplate mechanically attached to a ball valve.
The valve handle in its OFF position is guarded against ac-
cidental turning to the ON position (and system discharge)
by a nylon cable tie provided with the PrePaK assembly.
The cable tie is designed to allow, in case of an emergency,
forceful turning of the valve handle to the ON position.
Listings and Approvals
1. Underwriters Laboratories, Inc. Listed and Certified
for Canada* (cULus) as an assembled unit in the
“Special System Water Control Valves Assembled
Units” category, (VKYL).
*The system’s pressure switches must be specified
to meet Canadian requirements. This option is avail-
able.
2. Factory Mutual Approved as a Refrigerated Area
Sprinkler System for use in refrigerated rooms or
buildings. Refrigerated area sprinkler systems are
FM Approved as complete systems. Systems are FM
approved for use with thermal detectors and Class A
detector wiring only.
3. Approved for use in New York City based on UL List-
ing.
Note:
Although PrePak units are UL Listed, custom built
units are sometimes supplied upon request. The compo-
nents within these special units maintain their individual
Listings/Approvals, whereas the assembled units do not.