Reliable DDX PrePaK D Instructions For Installation, Operation Care And Maintenance

Bulletin 733 Rev. F

Bulletin 733 Rev. F

Model DDX PrePaK, Type D
Preaction System
4”(100mm), 6” (150mm) &
8” (200mm)

Instructions for
Installation, Operation,
Care and Maintenance

10 PSI (0.7 bar) Pneumatic Supervising Pressure

Single Interlock - Electric Release
Double Interlock - Electric/Electric Release

Contents Page

General Description 2

Listings and Approvals 4

Technical Data 4

Installation Requirements 5

System Operation 5-6

System Reset Procedure 6

Inspection, Testing and Maintenance 6-7

Diagrams:

Assembly Dimensions 3

Potter PFC-4410-RC Releasing Control Panel 8

Terminal Box Wiring 9

Factory Installed Electrical Devices 10-11

Detector Circuit Wiring 12-13

Output Device Wiring 14

Component Identification/System Setup 15-16

Potter Panel Programming 17-26

Ordering Information 27-28

Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523

General Description

The Reliable Model DDX 4” (100 mm), 6” (150mm) & 8”
(200mm) PrePaKs are completely self-contained, supervised
preaction systems that can be readily installed within a floor
space of 5.15ft
for the 8” (not including door swing). Installation of the PrePaK
(not including exterior devices, 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 supply connections are required.
Note: The Model DDX PrePak is available with an optional air
compressor and an optional Potter Model PFC-4410-RC Re­leasing/Control Panel wired for a 120 VAC / 60Hz or 220 VAC /
50 Hz power supply.

Figures 16, 17, and 18 in this Bulletin identify the standard and
optional equipment available in Reliable Model DDX PrePak,
Type D, Preaction Systems.

The Reliable Model DDX 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 Model DDX PrePaK 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 system implementation.

The Model DDX PrePaK can be used in both single 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 sprin-

kler, 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 at that time.

C. Detection and notification of a fire condition are provided

by fire detectors, without the delay associated 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
flowing from an operated sprinkler.

In single interlock applications, one fire detector senses the
presence of fire, thereby causing the electrical releasing control
panel to activate notification appliances and energize the sole­noid releasing valve in the open position. The use of cross-zoned
detectors will require operation of two detectors before the so­lenoid valve can open (Note: Verify that the detection method,
including the use of cross-zoned detection, are permitted by all
applicable codes and standards, as well as the requirements
of all authorities having jurisdiction. Cross-zoned detection may
not be permitted in New York City or by Factory Mutual.) The

2

(0.44 m2) for the 4” and 6” and 7.5ft2 (0.70m2)

solenoid valve, when closed, preserves supply water pressure
in the Model DDX valve’s push-rod chamber. Actuating the sole­noid valve releases that water pressure which allows the Model
DDX valve to open.

To discharge water from sprinklers on a single interlock system
with cross-zoned detection, two separate electrical detection
systems must activate and a sprinkler must open. During the
early stages of a fire, smoke or heat activates the first detector,
which causes the control panel to produce a local alarm and an
alarm at the fire alarm panel. Electrical relays inside the releasing
control panel can be used to shut down air moving equipment
or activate security doors and other electrical devices when the
panel goes into this first condition. Subsequent activation of a
second, nearby or adjacent detector, on a separate detection
system, will cause the panel to energize the solenoid valve open
and release water into the sprinkler piping. Water flowing into
the sprinkler piping will simultaneously produce water pressure
that cause the transfer of contacts in the alarm pressure switch
mounted in the riser assembly, thereby activating a water flow
alarm device. The flow of water into the sprinkler piping effec­tively converts the dry system into a wet-pipe sprinkler system.
In the event that the fire subsequently produces sufficient heat to
operate a sprinkler, water will flow from that sprinkler.

To flow water into a double interlock preaction system, two
events must take place: a fire detection device must operate,
and a pressure switch must be operated by the loss of system
pressure (sprinkler operation). These two signals, both an elec­tric signal from the detection system and an electrical signal
from the pressure (pneumatic) sensor, must coexist at the re­leasing control panel, which only then will energize the solenoid
releasing valve, causing water flow into the sprinkler system and
out of the open sprinkler(s).

In the event that the system piping is ruptured or a sprinkler
is accidentally opened, the system pressure switch will oper­ate and an alarm will sound. The Model DDX, Type D Valve as­sembly, however, will not release water since the solenoid valve
remains closed due to only one input into the releasing control
panel.

When using the Reliable Model DDX PrePaK, in either single
or double interlock applications, the sprinkler system is pressur­ized (supervised) with air provided by the air compressor and
is monitored by a system pressure switch. Alternatively, super­visory system pressure may be provided by a nitrogen source.

A Model B Hydraulic Manual Emergency Releasing station is
standard equipment in the Model DDX PrePaK. 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 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.

2.

Fig. 1

3.

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).

2. Factory Mutual (FM) Approved, as PrePak Single Interlock
and Double Interlock Preaction Systems.

* Electrical devices and control panel must be specified

to meet Canadian requirements. This option is avail­able.

3. Approved for use in New York City based on UL Listing.

Note: Although PrePak units are UL Listed, custom built units
are sometimes supplied upon request. The components within
these special units maintain their individual Listings/Approvals,
whereas the assembled units do not.

PrePak units are also available without their door-mounted Pot­ter PFC-4410-RC Releasing/ Control Panel and Air Compressor.
These units will still retain their Listings/Approvals, however the
installing contractor should make sure that any remote controlled
Releasing/Control Panels used with these units are Listed/Ap­proved and programmed to handle the required sequence of
operation necessary to operate the automatic sprinkler system.
Any unauthorized modification or addition made on-site to a
factory-built Listed/Approved unit will void the Listing/Approval.
Such modifications or additions may void the unit’s warranty as
well. Consult Reliable’s Technical Services Department before
proceeding with any such modifications or additions.

Technical Data

1. The Reliable Model DDX 4” (100 mm), 6” (150 mm) and 8”

(200mm) PrePaKs are rated for a minimum supply pres­sure of 20 psi (1.4 bar) and a maximum supply pressure of
250 psi (17.2 bar). Note: 1 bar = 100 kPa.

2. Friction loss, expressed in equivalent length of Schedule 40

pipe and based on Hazen-Williams Formula with C=120
and a flowing velocity of 15 ft/s (4.6 m/s), is:

System Size Equivalent Length

4” (100 mm) 32.8 ft (17.7 m)
6” (150 mm) 54.7 ft (21.8 m)

8” (200mm) 79.3ft (24.2m)

These values account for the Model DDX valve, supply
manifold tee, butterfly control valve, and small pipe/mani­fold located directly above Model DDX valve.

3. Shipping Weight:

System Size Weight

4” (100 mm) 680 lbs (308 kg)
6” (150 mm) 770 lbs (349 kg)

8" (200mm) 1350lbs (531kg)

4. Dimensions:

System Size Cabinet Dimensions

4” (100 mm) & 6” (150 mm)

8” (200mm)

25.7” W x 28.9” D x 68” H

(0.65 m W x 0.73 m D x 1.73 m H)

30” W x 36 D x 74” H

(0.76m W x 0.91m D x 1.88m H)

5. Grooved-End Connections:

Pipe Size

4” (100mm)

6” (150mm)

8” (200 mm)

Pipe Size

2” (50mm)

Groove Dimensions (Inlet & Outlet)

Outlet

Diameter

4.500”

(114mm)

6.625’

(168mm)

8.625”

(219mm)

Groove

Diameter

4.334”

(110mm)

6.455”

(164mm)

8.441”

(214mm)

Groove

Width

3/8”

(10mm)

7/16” (11mm)

Groove Dimensions (Drain Manifold)

Outlet

Diameter

2.375”

(60mm)

Groove

Diameter

2.250”

(57mm)

Groove

Width

5/16”

(8mm)

Outlet
Face to
Groove

5/8”

(16mm)

3/4”

(19mm)

Outlet
Face to
Groove

5/8”

(16mm)

6. Flanged-End Connections:

Flange Dimensions (Inlet & Outlet)

System

size:

8”

(200mm)

Flange

Type

ASME
B16.5
Class

150

Bolt

Circle

Diameter

11¾”

(298mm)

Bolt

Hole

Diameter

7/8”

(22mm)

Flange

Outside

Diameter

13½”

(343mm)

Flange

thickness

1”

(25.4mm)

Number

of Bolts

8

Flange Dimensions ( Drain)

System

(200mm)

size:

8”

Flange

Type

ASME
B16.5
Class

150

Bolt

Circle

Diameter

4¾”

(120mm)

Bolt Hole
Diameter

Flange

Outside

Diameter

3/4”

(19mm)6” (150mm)

Flange

thickness

3/4”

” (19mm)

Number
of Holes

4

The following is a list of Technical Data Bulletins which de-

scribe the valves and devices which are used in the system:

Device

Model DDX Deluge Valve Reliable Bulletin 519
Type D Double Interlock Preaction
Trim
Low Air Pressure Switch Potter 5400928
Alarm Pressure switch Potter 5400928
Nitrogen Pressure Switch Potter 5400930
Mechanical Sprinkler Alarm Reliable Bulletins 612/613
Solenoid Valve Reliable Bulletin 718
Releasing Control Panel Potter Manual #5403550
Fire Alarm Devices Reliable Bulletin 700

Desiccant Dryer

Reliable Bulletin #

(unless otherwise noted)

Reliable Bulletin 750

Wilkerson Catalog 9EM-

TK-190-4

The following table provides a quick reference to various pro­grams (found in this bulletin and the Potter Manual #5403550)
that may be utilized with a Model DDX PrePaK:

Desired

Applications

Single Interlock

Single Interlock,

Cross-Zoned

(1)

Refer to Potter Manual # 5403550 included with the PrePak, for other

programming options available.

(2)

Factory Program setting.

(1)

Single Hazard, Cross-Zoned, 2

Zone and 2 Supervisory Zones

Description

Single Hazard, 2 Alarm Zones

with 1 Waterflow Zone and 2

Supervisory Zones

Alarm Zones with 1 waterflow

Program

No.

Potter

Program #6

Custom

Program #1

(NYC)

Potter

Program #7

(2)

4.

Installation Requirements

The automatic sprinklers, releasing devices, fire detection
devices, manual pull stations, and signaling devices which are
utilized with the Reliable Model DDX 4” (100 mm), 6” (150 mm)
and 8” (200 mm) PrePaKs 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 tempera­ture of 40°F (4°C). Note: Heat tracing is not permitted. The so­lenoid valve is operated and supervised by the Potter Model
PFC-4410-RC Releasing Control Panel. Details on the electrical
connections of this system to the Potter Panel can be found in
the Potter Manual #5403550, Installation, Operation and Instruc­tion of PFC-4410-RC Releasing Control Panel (this manual is
included with other pertinent manuals and shipped inside the
enclosure). This panel is fully zone and output programmable
and may be adapted to several applications.

System Supervising Pressure Requirements

In accordance with NFPA 13, when using the Reliable Mod­el DDX 4” (100 mm), 6” (150 mm) or 8” (200 mm) PrePaK in
double interlock applications, a minimum of 7 psi (0.5 bar)
pneumatic pressure is required to supervise the sprinkler sys­tem. When initially filling the system with air, the enclosure’s door
should remain open in order to provide maximum intake air flow
to the air compressor. The air compressor is connected to an 8
gallon (30.3 liter) ASME rated storage tank. This tank functions
as a reservoir, providing make-up air to compensate for small,
intermittent leaks in the sprinkler system. It should be noted
that significant leaks may overburden this storage tank, thereby
causing the air compressor to continuously cycle on and off.

The Pressure Maintenance Device supplied with the system
(refer to Fig. 9 or 10), is factory set to maintain system pneu­matic pressure at approximately 10 psi (0.7 bar). Readjusting
system pressure to approximately 10 psi (0.7 bar), if necessary,
is accomplished by first loosening the locknut on the air pres­sure regulator and turning the adjustment screw (refer to Fig. 9
or 10). The system air pressure gauge that is attached to the
vertical pipe/manifold (mounted directly above the Model DDX
Deluge Valve) may be used to verify the correct level of pneu­matic pressure.

The system air pressure switch (refer to Fig. 9 or 10) is factory
set to operate between 8 psi and 4 psi (0.6 bar and 0.3 bar)
with decreasing pressure. Adjustment, if required, should be
made according to System Sensor Bulletin A05-0176 included
with the switch.

System Electrical Requirements

All releasing, alarm, and detection devices in the Reliable
Model DDX 4” (100 mm), 6” (150 mm) and 8” (200 mm) Pre­PaKs are supervised by a Potter Model PFC-4410-RC Releasing
Control Panel. To utilize one of the doors of the steel enclosure
as a mount for the releasing control panel, all of the terminals
are translated to two, water-tight terminal boxes mounted on the
interior of the enclosure. Note: The EOL (End of Line) resistors
have also been relocated. It is from these terminal boxes that all
field wiring is connected. There is one terminal box that contains
the 24 VDC connections and one that contains the 120 / 220
VAC connections. The Reliable Model DDX PrePaK is delivered
with five factory-installed electrical devices. They consist of the
following:

1. A system air pressure switch, which is used to monitor
sprinkler piping.

2. An alarm pressure switch, which indicates an actuation of
the deluge valve.

3. A normally-closed, releasing solenoid valve, which is used
to actuate the deluge valve.

4. A ¾ HP or 1½ HP air compressor with 8 gallon (30.3 liter)
tank (1½ HP compressor is optional with 6” (150 mm) sys­tem only).

5. A supervised butterfly water control valve (A System Side
butterfly valve is optional).

The factory electrical connections of these devices are illus­trated in Fig. 4. For information on how to install fire detection
devices to initiating Zones 1 and 2 of the Potter Model PFC­4410-RC Releasing Control Panel, refer to Fig. 6 or Fig. 7. For
information on how to install output devices, i.e., alarm bells or
trouble annunciators, to the Potter Model PFC-4410-RC Releas­ing Control Panel, refer to Fig. 8. The power supply, standby
emergency power supply, battery charger and rectifier circuitry
are all contained within the PFC-4410-RC panel. Batteries that
provide 90 hours of standby power are provided with the panel.
For additional information and detailed wiring diagrams, refer to
Potter Manual #5403550, Installation, Operation and Instruction
of PFC-4410-RC Releasing Control Panel.

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.

System Operation (Single Interlock)

To fully activate (water flow) the Reliable Model DDX 4” (100
mm), 6” (150 mm) or 8” (200 mm) PrePaK in a single interlock
application, a fire detection device (smoke, heat, etc.) (two de­tectors with cross-zoned detection) must activate. Subsequent­ly, a sprinkler head must open to discharge water on the fire.

When the single interlock preaction system is set for service,
the supply pressure acts both on the underside of the deluge
valve’s clapper and on the valve’s push rod by means of the
pressurized push rod chamber. The pressure force acting on
the push rod, when utilized with the mechanical advantage of
the deluge valve’s lever, is more than sufficient to hold the clap­per in the closed position against the water supply pressure.

Energizing the releasing solenoid valve allows the deluge
valve’s push-rod chamber to be vented to drain through its
outlet. Since the pressure cannot be replenished through the
inlet restriction as rapidly as it is vented though the outlet, the
push-rod chamber pressure falls rapidly. When the push-rod
chamber pressure drops below one-third of the supply pres­sure, the opening force acting beneath the clapper becomes
greater than the push-rod force acting on the lever. This causes
the clapper to open. Refer to Reliable Bulletins 518 and 519 for
further details.

Once the clapper has opened, the lever acts as a latch, pre­venting the clapper from returning to the closed position. Water
from the supply flows through the deluge valve into the system
piping. Water also flows through the deluge valve alarm outlet
to activate any water flow alarm devices. Note that the solenoid
valve will be maintained open by the Potter Model PFC-4410­RC Releasing Control Panel’s latching feature until it is reset for
operation.

5.

After system shutdown and draining, the Model DDX Deluge
Valve is easily reset without special tools (see Fig. 9 or 10). Re­store detection devices by resetting or replacing any operated
device. Once detection devices are restored, (the Potter Model
PFC-4410-RC Releasing Control Panel reset), and supply pres­sure is re-supplied to the push-rod chamber, the deluge valve
is reset.

System Operation (Double Interlock)

To fully activate (water flow) the Reliable Model DDX 4” (100
mm), 6” (150 mm) or 8” (200 mm) PrePaK in a double interlock
application, two independent events must coexist. An electrical
fire detection device (smoke, heat, etc.) and the system air pres­sure switch must be activated. This pressure switch is activated
by a reduction of the system’s pneumatic pressure (as a result of
sprinkler operation). Both of these events will cause the control
panel to energize the solenoid valve, thereby releasing water
through the deluge valve and into the sprinkler system. The ini­tiation of either one of these events will only cause an alarm to
annunciate, and will not fill the sprinkler system.

When the double interlock preaction system is set for service,
the supply pressure acts both on the underside of the deluge
valve’s clapper and on the valve’s push rod by means of the
pressurized push rod chamber. The pressure force acting on
the push rod, when utilized with the mechanical advantage of
the deluge valve’s lever, is more than sufficient to hold the clap­per in the closed position against the water supply pressure.

Energizing the releasing solenoid valve allows the deluge
valve’s push-rod chamber to be vented to drain through its
outlet. Since the pressure cannot be replenished through the
inlet restriction as rapidly as it is vented though the outlet, the
push-rod chamber pressure falls rapidly. When the push-rod
chamber pressure drops below one-third of the supply pres­sure, the opening force acting beneath the clapper becomes
greater than the push-rod force acting on the lever. This causes
the clapper to open. Refer to Reliable Bulletins 518 and 519 for
further details.

Once the clapper has opened, the lever acts as a latch, pre­venting the clapper from returning to the closed position. Water
from the supply flows through the deluge valve into the system
piping. Water also flows through the deluge valve alarm outlet
to activate any water flow alarm devices. Note that the solenoid
valve will be maintained open by the Potter Model PFC-4410­RC Releasing Control Panel’s latching feature until it is reset for
operation.

After system shutdown and draining, the Model DDX Deluge
Valve is easily reset without special tools (see Fig. 9 or 10). Re­store detection devices by resetting or replacing any operated
device. Once detection devices are restored, (the Potter Model
PFC-4410-RC Releasing Control Panel reset), and supply pres­sure is re-supplied to the push-rod chamber, the deluge valve
is reset.

Resetting Single And Double Interlock Systems

Refer to Fig. 9 or 10.

1. Close the main valve controlling water supply to the deluge

valve and close the ¼” air shutoff valve, valve J.

2. Close the pushrod chamber supply valve, valve A.

3. Open the main drain valve, valve B, and drain system.

4. Open all drain valves and vents at low points throughout

the system, closing them when flow of water has stopped.
Open valve D. Note: The above steps accomplish the
relieving of pressure in the pushrod chamber of the deluge
valve.

5. Push in the plunger of ball drip valve, valve F, to force the
ball from its seat, and drain any water in the alarm line.

6. With the Model B Manual Emergency Station, valve D,
open, push in and rotate the deluge valve’s external reset
knob clockwise until you hear a distinct clicking noise, indi­cating that the clapper has closed. Note: The reset knob
can be rotated only after pressure in the pushrod chamber
is reduced to atmospheric conditions (0 psig).

7. Inspect and replace any portion of the sprinkler system
subjected to fire conditions.

8. Verify that the following valves are in their respective posi­tions:
valve C – open, valve E – closed, valve H – closed,
valve K – open, valve M – closed.

9. Open valve A and allow water to fill the deluge valve’s push­rod chamber. Close valve D.

10. Bleed any air from the actuation piping by energizing the
solenoid valve. This is done by operating a detector or an
electric manual emergency station. While water is flowing
through the solenoid valve, cause it to close by pressing the
system reset button on the Potter PFC-4410-RC Releasing
Control Panel. Note: All detection devices must be reset
before the releasing/control panel can be reset.

11. Open the ¼” air shutoff valve, valve J, to restore air pres­sure in the sprinkler system. The rapid air-fill shutoff valve,
valve M, may be opened here to expedite the filling of the
sprinkler system.

12. Open slightly the main valve controlling water supply to the
Model DDX Deluge Valve, closing drain valve B when wa­ter flows. Observe if water leaks through the ball drip valve,
valve F, into the drip cup or drain manifold, G. If no leak
occurs, the deluge valve’s clapper is sealed. Open slowly,
and verify that the main valve controlling water supply is
fully opened and properly monitored.

13. Verify that valve A is open.

14. Secure the handle of the Model B Manual Emergency Sta­tion, valve D, in the OFF position with a nylon tie (supplied
with the assembly).

15. Press the system reset button on the Potter PFC-4410-RC
Panel to place the system in the ready condition. Note: All
detection devices must be reset before the panel can be
reset.

Maintenance

The Reliable Model DDX PrePaK and associated equipment
shall periodically be given a thorough inspection and test. NFPA
25, Standard for the Inspection, Testing and Maintenance of
Water Based Fire Protection Systems, provides minimum main­tenance requirements. Systems should be tested, operated,
cleaned and inspected at least annually, and parts replaced as
required. Periodically open the air/condensate drain valve (refer
to Fig. 9 or 10) beneath the air tank to drain any condensate ac­cumulation. Bulletin 518 provides information for maintaining the
Model DDX Deluge Valve. Potter Manual #5403550 provides
information for maintaining the PFC-4410-RC Releasing Control
Panel.

6.

Inspection And Testing Of Single And Double
Interlock Systems

Refer to Fig. 9 or 10.

1. Water supply — Verify that the valve controlling wa­ter supply to the deluge valve is opened fully and
properly monitored.

2. Alarm line — Verify that valve C is opened and re­mains in this position.

3. Other trimming valves — Verify that valve A is
open as well as all of the pressure gauge’s ¼” 3-way
valves. Valves D, E, and H should be closed.

4. Ball drip valve F — Push in on the plunger to be sure
the ball check is off its seat. If no water appears, the
deluge valve’s water seat is tight. Inspect the bleed
hole in the front of the Model DDX Deluge Valve for
leakage.

5. System pneumatic pressure — Verify that system
air pressure is between 7 and 10 psi (0.5 bar 0.7
bar). Check the Pressure Maintenance Device for
leakage and proper pressure.

6. Releasing device — Check the outlet of the releas­ing device (i.e., solenoid valve or the Model B Manual
Emergency Station, valve D) for leakage. Also verify
that tubing drain lines from releasing devices are not
pinched or crushed which could prevent proper re­leasing of the deluge valve.

7. Testing alarms — Open valve E permitting water
from the supply to flow to the alarm pressure switch
and to the mechanical sprinkler alarm (if present).
After testing, close this valve completely. Push in on
the plunger of ball drip valve F until all of the water
has drained from the alarm line.

8. Operational test — Open the Model B Manual Emer­gency Station, valve D only, OR, operate the solenoid
valve by electrical actuation. This is done by oper­ating a detector or an electric manual emergency
station. Double interlock systems also require that
the sprinkler system’s air pressure be discharged,
through the inspectors test station or other venting
means, below 4 psi (0.3 bar) before total system
operation will occur. Note: An operational test will
cause the Deluge Valve to open and flow water into
the sprinkler system.

9. Secure the Model B Manual Emergency Station,
valve D, in the OFF position with a nylon tie (included
with the assembly) after the deluge valve is reset.

Testing The Model DDX PrePaK Without
Causing Water Flow

Refer to Fig. 9 or 10.

1. Close the main valve controlling water supply to the deluge
valve and open drain valve B.

2. Verify that valve A is open, allowing water to enter the push­rod chamber.

3. Operate the detection system - Operate a cross-zoned re­leasing control panel by operating two detectors. For dou­ble interlock applications, close valve J and open valve H.
Doing so will discharge the sprinkler system’s air pressure.

4. Step #3 should result in a sudden drop of water pressure
in the deluge valve’s push-rod chamber via an energized
solenoid valve.

5. Reset the detection system - Reverse the detection system
operations performed in Step #3 above. Note: All detec­tion devices must be reset before the Potter PFC-4410-RC
Releasing Control Panel can be reset.

6. Proceed according to the directions listed in the “Resetting
Single And Double Interlock Systems” section of this bul­letin.

Draining Excess/Condensate Water From
The System

Refer to Fig. 9 or 10.

1. Close the main valve controlling water supply to the deluge
valve. Also, close valve A and open the main drain valve,
valve B.

2. Open the condensate drain valve, valve H, until all of the
water (if any) drains completely. Note: Be sure not to keep
valve H open for an extended period of time because that
will cause enough system air to bleed off, thereby activat­ing the system pressure switch and causing an potentially
undesirable alarm condition.

3. Close the main drain valve B. Allow the system’s air pres­sure to return to its previous level. Open valve A first, and
then open the main valve controlling the water supply to the
deluge valve.

SOLENOID VALVE INSPECTIONS, TESTS
AND MAINTENANCE

WARNING: THE OWNER IS RESPONSIBLE FOR MAIN­TAINING THE FIRE PROTECTION SYSTEM IN PROP­ER OPERATING CONDITION. ANY SYSTEM MAINTE­NANCE OR TESTING THAT INVOLVES PLACING A
CONTROL VALVE OR DETECTION SYSTEM OUT OF
SERVICE MAY ELIMINATE THE FIRE PROTECTION
OF THAT SYSTEM. PRIOR TO PROCEEDING, NOTIFY
ALL AUTHORITIES HAVING JURISDICTION. CONSID­ERATION SHOULD BE GIVEN TO EMPLOYMENT OF
A FIRE PATROL IN THE AFFECTED AREA.

WARNING: PRIOR TO OPERATING THE SOLENOID
VALVE, BE SURE TO CLOSE THE SYSTEM CONTROL
VALVE TO AVOID UNINTENTIONAL OPERATION OF
THE DELUGE VALVE

1. Inspections: It is imperative that the system be inspected
and tested in accordance with NFPA 25 on a regular basis.
The frequency of the inspections may vary due to contami­nated water supplies, corrosive water supplies, or corrosive
atmospheres. In addition, the alarm devices, detection sys­tems, or other connected trim may require a more frequent
schedule. Refer to the system description and applicable
codes for minimum requirements.

2. The valve must be inspected at least monthly for cracks,
corrosion, leakage, etc., cleaned and replaced as neces­sary.

3. If leakage is suspected through the solenoid valve, it should
be replaced.

7.

RUN

PROGRAM

RED OUTPUT LED STEADY: ABORT

ZONE 1

ZONE 2

ZONE 3

ZONE 4

AC POWER
POWER TBL
SYSTEM TBL
SUP TBL

GROUND
FAULT

OUTPUT 1

OUTPUT 2

OUTPUT 3

OUTPUT 4

SUP 1/ABORT
SUPERVISORY 2
COMMON ALARM
ALARM SILENCE

STEADY:
DISCHARGED
FLASHING:
PRE-DISCHARGE

PROGRAM
MODE

SET

SELECT

RUN
MODE

SCROLL-UP
BUZZER SILENCE

LAMP

}

TEST

SCROLL-DOWN
BUZZER SILENCE

SIGNAL SILENCE

VIEWING ANGLE

FUNCTION

SYSTEM RESET

Fig. 2

8.

Fig. 3

9.