Reliable Double Interlock Preaction System D Maintenance manual

The Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 737 Rev. B
Double Interlock
Preaction System - Type D
2" (50mm), 2-1/2" (65mm),
3" (80mm) & 76mm Sizes
Instructions for
Installation, Operation,
Care, and Maintenance
10 PSI (0,7 bar) Pneumatic Supervising Pressure
With Electric / Pneumatic Actuation
Controlled by a Cross-Zoned Releasing Control Panel
Type D System
Bulletin737
Rev.
B
Available with 175 psi (12,1 bar) or
250 psi (17,2 bar) Rated Solenoid
Valve
Externally Resettable Clapper
OneMainDrain

General Description
Double Interlock Preaction Systems are designed for
water-sensitive areas that require the maximum protec-
tion from inadvertent water flow into the sprinkler system
piping. A refrigerated area is an example of this type of
water sensitive environment.
To flow water into a Type D Double Interlock Preaction
System, two events must take place. A fire detection de-
vice must operate, and the low air pressure switch must
be operated by the loss of system air pressure (sprinkler
operation). These two signals must coexist at the releas-
ing control panel, which only then will energize the nor-
mally closed solenoid valve (175 psi (12,1 bar) or 250 psi
(17,2 bar) rated), causing water flow into the system.
These Systems utilize fire detection devices and sys-
tem air pressure as separate zones (inputs) to a
cross-zoned releasing control panel. The solenoid re-
leasing valve remains closed until energized by the re-
leasing control panel. This will occur only when both a fire
detection device is operated and the low air pressure
switch has detected sufficient loss of system air pressure
(sprinkler operation).
In the event that the system piping is ruptured, or a
sprinkler head is accidentally opened, the low air pres-
sure switch will operate and an alarm will sound. The
Model DDX Deluge Valve, however, will not be released to
flow water since the solenoid valve remains closed due to
the cross-zoned control panel configuration. The same
end result would occur if a fire detection device were
falsely operated. The control panel will activate an alarm,
however again, the Model DDX Deluge Valve will not flow
water due to the cross-zoned control panel configuration.
This requirement for both a detector to operate and the
loss of system air pressure before the Model DDX Deluge
Valve releases water into a preaction system assures
maximum protection against inadvertent water flow be-
fore a sprinkler is open. Double interlock preaction sys-
tems are primarily used to protect refrigerated areas
where accidental water release before a sprinkler is
opened can cause ice blockage, resulting in an inopera-
tive sprinkler system and substantial property damage.
At the heart of Reliable’s Type D Double Interlock
Preaction System is the Model DDX Deluge Valve. This
Deluge Valve is a hydraulically operated,
straight-through-design, differential-type valve (see Fig.
1). System maintenance is simplified since priming water
is not required and the Deluge Valve can be reset exter-
nally without cover removal. This is accomplished by
pushing in and turning the external reset knob at the rear
of the Deluge Valve (see Fig. 1). This feature provides a
significant system-restoration time advantage
The Reliable Type D Double Interlock Preaction Sys-
tem trim set (see Fig. 2) provides all of the necessary
equipment for connections to the Model DDX Deluge
Valve’s pushrod chamber inlet and outlet ports, the 114”
(30mm) main drain, alarm devices, air supply, water sup-
ply, and required pressure gauges. This trim set is avail-
able in individual parts, in time-saving, segmentally
assembled kit forms, or fully assembled to the Model DDX
Deluge Valve (with or without a control valve).
Listings & Approvals
ReliableTypeD2”(50mm),2
12” (65mm), 3" (80mm)
and 76mm Double Interlock Preaction Systems are Fac-
tory Mutual Approved Refrigerated Area Sprinkler Sys-
tems 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.
ReliableTypeD2”(50mm),2
12” (65mm), 3" (80mm)
and 76mm Double Interlock Preaction Systems are Listed
by Underwriters Laboratories, Inc. and UL certified for
Canada (cULus) as Special System Water Control Valves
– Double Interlock Type (VLJH) category.
The NYC acceptance number for this system is MEA
258-93-E.
The Reliable Type D Double Interlock Preaction Sys-
tem is UL Listed and FM Approved only when used with
the trim components shown in Fig. 2.
2.
Fig. 1

Fig. 2
3.

4.
System Operation
When set correctly for service, the Model DDX Deluge
Valve is hydraulically established to withhold the supply
water from the sprinkler system piping. The Reliable
Model DDX Deluge Valve is shown in both closed and
open positions in Fig. 1. In the closed position, the supply
pressure acts on the underside of the clapper and also on
the push rod through the push rod chamber’s inlet restric-
tion. The resultant force due to the supply pressure acting
on the push rod is multiplied by the mechanical advan-
tage of the lever and is more than sufficient to hold the
clapper closed against normal supply pressure surges.
Item
No.
Part
Number
Description No.
Req’d
1
6103022000 Assembly, Valve, 2” (50mm) DDX
1
6103022500 Assembly, Valve, 2 12” (65mm) DDX
6103030000 Assembly, Valve, 3” (80mm) DDX
6103027600 Assembly, Valve, 76mm DDX
2
7G05080800 Coupling, Rigid, 2" (50mm)
17G05101000 Coupling, Rigid, 2½" (65mm)
7G05121200 Coupling, Rigid, 3" (80mm)
3
6205212000 Water - Ball Valve, 2” (50mm)
16215051000 Water - Butterfly Valve, 2½” (65mm)
6215051200 Water - Butterfly Valve, 3” (80mm)
4
7D05414200 Coupling, 2” (50mm) Grooved
w/ ½” NPT outlet
17D05424200 Coupling, 2 12” (65mm) Grooved
w/ ½” NPT outlet
7D05434200 Coupling, 3” (80mm) Grooved
w/ ¾” NPT outlet
56999991212 Pressure Switch, EPS10A-2 1
6999992360 Pressure Switch, (ULC) EPS10-2
66871020000 Valve, Solenoid (175 psi)1
6871020020 Valve, Solenoid (250 psi)
7 98048025
Bushing, Reducer, ¾" x ¼"
(2" & 2½" Valve only)1
Bushing, Reducer, ¾" x ¼"
(3" Valve only)2
8 98048000
Bushing, Reducer, ½" x ¼"
(2" & 2½" Valve only)1
Bushing, Reducer, ½" x ¼"
(3" Valve only)--
9 92056810 Brass Connector, 3/8" ID x ½" NPT 1
10 92056702 Brass Connector. 3/8" Tubing x ¼' NPT 2
11 92056704 Elbow Connector, 3/8" Tube x ½” NPT 1
12 78653000 Model B Manual Emergency Station 1
13 78653004 Valve, Caution Station, ½”1
14 98048015 Reducer, 2” x 1”, PVC 1
15 98048022 Bushing, Reducer, ¾" x ½"2
16 96816902 Valve, Check, ¼" In-Line 1
17 92056705 Elbow Connector, 3/8" Tube x ¼” NPT 1
18 6304000100 Pressure Maintenance Device, Model A2 1
19 98050004 Drain Cup, PVC 1
20 98174400 Street Elbow, ½"2
21 98174408 Street Elbow, ¼"1
22 98174414 Elbow, 1¼"1
23 98174403 Elbow, 1"1
24 98174404 Elbow, ¼"1
25 98174402 Elbow, ¾"1
26 96920912 Flex Line, ½"1
27 98248000 Gauge, Pressure, Air 2
28 98248001 Gauge, Pressure, Water 2
29 94616918 Nameplate, Double Interlock, Type D 1
30 98543239 Nipple, 1¼" x 3"1
31 98543250 Nipple, 1¼" x 4"1
32 98543285 Nipple, 1¼" x Close 1
33 98543263 Nipple, 1" x 3”2
34 98543213 Nipple, 1" x Close 1
35 98543223 Nipple, ½" x 1½”9
36 98543210 Nipple, ½" x 2½”1
37 98543209 Nipple, ½" x 2”4
38 98543230 Nipple, ½" x 3”1
39 98543228 Nipple, ½" x 4½” 1
40 98543212 Nipple, ½" x Close 3
41 98543226 Nipple, ¼" x 1½”2
42 98543224 Nipple, ¼” x 4½" 1
43 98543243 Nipple, ¼” x 4"1
44 98543232 Nipple, ¾" x 2”1
45 98543231 Nipple, ¾" x 3”1
46 99080002 Pad-Adhesive 1
47 98750003 Cross ½”1
48 98604406 Plug, ½"1
49 98614403 Plug, ¼”3
50 98614401 Plug, ¾"2
51 98727607 Strainer, ¼"1
52 96606630 Tee, 1¼" x 1¼" x 1"1
53 96606607 Tee, ½" x ½" x ¼"1
54 98761649 Tee, ½" x ¼" x ½ 2
55 98761651 Tee, ½"2
56 96606612 Tee, ¾" x ½”x ½”1
57 96606601 Tee, ¾"1
58 89141112 Tie, Retaining 9
59 98815204 Union, ½", O-Ring Seal 1
60 98815200 Union, ½"2
61 98840160 3-Way Valve, ¼"2
62 98840106 Valve, Angle, 1¼"1
63 98840101 Valve, Angle, ¼"1
64 78653100 Valve, Ball Drip, ½"1
65 98840117 Valve, Ball, ¼" NPTF x ¼" NPTM 1
66 98840145 Valve, Check, 1"1
67 98840181 Valve, Check, ½"2
68 98840187 Valve, Check, ¼" NPTF x ¼" NPTM 1
69 98840171 Valve, Globe, ½"1
70 ----- ----- --
71 96686722 Tubing, Copper, 3/8” O.D. x 2 ft.1
72 96686756 Tubing, Plastic, 3/8” I.D. x 6 ft.1
73 98543227 Nipple, ¼" x Close 1
74 98840172 2-Way Valve, ¼" 1
Double Interlock Preaction Trim Parts List (Refer to Fig. 2) - Type D
Item
No.
Part
Number
Description No.
Req’d

Whenever a fire and a low system air pressure condi-
tion are detected, the energized solenoid valve vents the
push rod chamber to atmosphere through the chamber’s
outlet. Since the pressure cannot be replenished through
the inlet restriction as rapidly as it is vented, the push rod
chamber pressure falls instantaneously. When the push
rod chamber pressure approaches approximately
one-third of the supply pressure, the upward force of the
supply pressure acting beneath the clapper overcomes
the lever-applied force thereby opening the clapper.
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 the alarm devices.
After system shutdown, resetting the Model DDX De-
luge Valve is quite simple. Doing so only requires pushing
5.
in and turning the reset knob at the rear of the valve (see
Fig 1). The external reset feature of the Model DDX De-
luge Valve provides a means for simple, economical sys-
tem testing, which is one essential facet of a good
maintenance program. The external reset feature does
not, however, eliminate another important facet of good
maintenance, namely, periodic cleaning and inspection
of the internal valve parts.
In the event that water builds up inside the valve due to
condensate from the air supply system or water left inside
from valve system testing, a drain is available for venting.
After closing the main supply valve, a small valve over the
drain cup can be opened slightly until the water inside the
valve body and the main pipe column has drained. See
the section titled “Draining Excess/Condensate Water
From System” in this bulletin for the detailed procedure.
Fig. 3

6.
The Model B Manual Emergency Station (see Fig. 3) is
also included in the Reliable Type D Double Interlock
Preaction System trim set. It consists of an aluminum
nameplate mechanically attached to a ball valve. The
valve handle in its OFF position is guarded against acci-
dental turning to the ON position (and system discharge)
by a nylon cable tie provided with each trim kit. The cable
tie is inserted, as shown in Fig. 3, after the system has
been restored for operation. The nylon cable tie is de-
signed to allow, in case of an emergency, forceful turning
of the valve handle to the ON position. As an alternative to
the Model B Hydraulic Manual Emergency Station, the
Model A Hydraulic Manual Emergency Pull Box (see Reli-
able Bulletin 506) is also available and can be provided as
an option.
Whenever ambient temperature conditions are high,
the water temperature in the Model DDX Deluge Valve’s
pushrod chamber could possibly increase, thereby in-
creasing the pressure in the chamber to values exceed-
ing the rated pressure of the system. In an indoor
installation where standard room temperatures are ex-
ceeded, a pressure relief kit may be needed. Pressure re-
lief kit, P/N 6503050001, can be installed into the pushrod
chamber’s releasing line to limit the pressure to 175 psi
(12,1 bar).
Pressurizing Line Connection
The water supply for the push-rod chamber must be
provided by connection of its inlet pressurizing line to the
water supply piping. Pressurizing lines for multiple Model
DDX Deluge Valve push-rod chambers must never be
manifolded together, having only a single tap on the water
supply piping. Each Model DDX Deluge Valve must have
its own push-rod chamber pressurizing line connection.
This connection must be made on the supply side of the
main water supply control valve. This can be accom-
plished by:
• Using a tapped connection directly below or next to
the main water supply control valve using a welded
outlet or the appropriate mechanical fittings. A
grooved-end outlet coupling is one way to achieve
this (see Fig. 2); or
•Using a water supply control valve that has an avail-
able threaded (NPT) supply-side tap design to allow
for a direct water supply connection to the Model DDX
Deluge Valve’s push-rod chamber.
Caution: Reliable’s DDX valve is designed with an inlet
restriction built into the pushrod chamber. It is important
not to introduce additional restrictions into the direct wa-
ter supply connection or the discharge from the pushrod
chamber by installing additional valves or improperly in-
stalling the copper lines used in the trim of the valve.
Hydrostatic Testing of DDX Valves and DDX
Systems
As required by NFPA 13, fire sprinkler systems with
working pressures up to and including 150 psi are to be
hydrostatically tested at a water pressure of 200 psi and
maintain that pressure without loss for two hours. Fire
sprinkler systems with working pressures above 150 psi
are required to be hydrostatically tested at 50 psi above
the system working pressure and maintain that pressure
without loss for two hours. In addition to the hydrostatic
tests described above, dry pipe and double interlock
preaction systems require an additional low pressure air
test. In some cases, hydrostatic testing (in accordance
with the NFPA 13 requirements noted above) will result in
pressures that exceed the working pressure of the valve
and trim kit for the two-hour test period.
The valve and applicable trim kit have been tested, ap-
proved and listed under these conditions and as such, hy-
drostatic testing in accordance with NFPA 13 is
acceptable. In addition, the clapper can remain in the
closed position and the trim kit need not be isolated, as
each has been designed to withstand hydrostatic testing
as required by NFPA 13.
Hydrostatically testing the valve and trim to pressures
higher than their rating is limited to the hydrostatic test as
referenced by NFPA 13. It does not address the occur-
rence(s) of a “water hammer” effect, which can indeed
damage the valve. A “water hammer” in the water supply
piping of the valve can create pressures in excess of the
rated pressure and should be avoided by all necessary
means. This condition may be created from improper fire
pump settings, underground construction work, or an im-
proper venting of trapped air in the water supply piping.
System Design Considerations
The automatic sprinklers, air compressor, releasing
devices, electric releasing control equipment, fire detec-
tion devices, manual pull stations, and signaling devices
which are utilized with the Type D Double Interlock
Preaction System must be UL or ULC Listed or FM Ap-
proved, as applicable.
Factory Mutual requires that detection devices in re-
frigerated areas be of the fixed temperature type. In addi-
tion, they must have a temperature rating lower than that
of the sprinklers and preferably, as low as possible for the
given ambient conditions.
The Deluge Valve, and all interconnecting piping must
be located 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.
Pendent sprinklers, other than dry pendents, used on
preaction systems shall be installed on return bends per
NFPA 13.
The solenoid valve is operated and supervised by the
electrical releasing/control panel. Details on the electrical
portion of this system can be found in Reliable Bulletin
700, “Special Hazards & Special Systems.”
System Air Pressure Requirements
In accordance with NFPA 13, double interlock
preaction systems require a minimum of 7 psi (0,5 bar)
pneumatic pressure to supervise the sprinkler system.
The Model A-2 Pressure Maintenance Device is used to
maintain the system pneumatic pressure between 7 and
10 psi (0,5 and 0,7 bar) where a dry nitrogen gas supply or
a clean, dependable, and continuous (24 hours per day, 7
days per week) compressed air source is available.
To adjust the system pneumatic pressure between 7
and 10 psi (0,5 and 0,7 bar) refer to Reliable Bulletin 251.
The low air pressure alarm switch (Item #5, Fig. 2) is fac-
tory set to operate between 5 and 6 psi (0,3 and 0,4 bar)
with decreasing pressure. If necessary, adjustments can
be made by following the manufacturer’s adjustment pro-
cedure as described in the installation and maintenance
instructions enclosed with the switch.

Fig. 4
7.

8.
Note: The dew point of the air must be maintained below the
lowest ambient temperature to which the double interlock
system piping will be exposed. Introduction of moisture into
the system piping that is exposed to freezing temperatures
can create ice blockage, which could prevent proper opera-
tion of the system. As minimum the supply of air should be
taken from refrigerated area at the lowest temperature. The air
supply system must be carefully designed to prevent plug-
ging by frost deposits. Special requirements such as those in
FME&R’S “Installation Guidelines for Refrigerated Storage”
may need to be incorporated.
Whenever multiple Preaction Systems are installed at
the same location, it is strongly recomended that each
system have its own Model A-2 Pressure Maintenance
Device for individual maintenance of air pressure.
System Electrical Requirements
All releasing and detection devices in Type D Double
Interlock Preaction Systems are operated and supervised
by the Potter PFC-4410-RC Releasing/Control Panel in
accordance to the wiring diagram shown in fig. 4. The Re-
leasing/Control Panel should be set to use Program #11
(see Potter Instruction Manual #5403550).
The power supply, the standby emergency power
supply, battery charger, and the rectifier circuitry are
all contained within the Potter PFC-440-RC Releas-
ing/Control Panel. Batteries that provide ninety hours
of standby power are required for FM Approved sys-
tems.
The Model BNG-1 Manual Emergency Station can
be connected as a simple detector for fire annuncia-
tion, or the Model BNG-1F can be connected to both
zones for total system emergency manual operation.
The solenoid valve is operated and supervised by
the Potter PFC-4410-RC Releasing/Control Panel. The
Potter PFC-4410-RC Releasing/Control Panel requires
120 VAC.
Caution: Repairs or disassembly of the solenoid
valve should only be done by a trained technician. An
improperly repaired or partially assembled solenoid
valve could result in failure of the valve to operate.
Double Interlock Preaction System
Electric/Electric Actuation (Type D)
Engineering Specifications
General Description
Preaction system shall be a double interlock preaction
system utilizing a 2” (50mm), 212” (65mm), 3" (80mm) and
76mm Reliable Model DDX Deluge Valve. Deluge Valve
shall be a [2” (50mm)] [212” (65mm)] [3” (80mm)] [76mm]
[cULus Listed] [Factory Mutual Approved] hydraulically
operated, differential latching clapper-type valve. Deluge
valve construction shall be of lightweight, ductile-iron con-
struction with “screw in” stainless steel seat and clapper
assembly. Stainless steel seat shall have O-ring seals to
resist leakage and corrosion. Clapper facing shall be
pressure actuated, providing a limited compression seat
for the sealing force between the clapper rubber facing
and the valve seat. Deluge valve shall have an external re-
set knob for resetting the clapper without requiring the re-
moval of the valve face plate. Push-rod chamber design
shall consist of a stainless steel piston/ push-rod and
spring assembly with diaphragm seal secured to the
casting through a push-rod guide constructed of a syn-
thetic engineering plastic to resist corrosion. Casting shall
have a bleeder hole located on the pushrod chamber for
air/water leakage indication. Trip ratio shall be approxi-
mately a 3:1 force differential. Deluge valve shall be of the
straight through design to minimize friction loss. Deluge
valve shall be activated by [hydraulic wet-pilot][low pres-
sure, pneumatic dry-pilot][electric] actuation trim. Inlet re-
striction orifice shall be factory installed into the inlet port of
the deluge valve push-rod cover plate and not be a sepa-
rate part of the deluge valve trim. End connection style to
be [2” (50mm), 2½” (65mm), 3” (80mm) or 76mm]
grooved inlet and grooved outlet, per ANSI/AWWA C606.
Deluge valve shall have a rated working pressure of 250
psi (17,2 bar) and shall be factory hydrostatic tested at
500 psi (34,5 bar). Deluge valve to be [2” (50mm)][2½”
(65mm)][3” (80mm)][76mm] Reliable Model DDX Deluge
Valve (Bulletin 513).
Valve trim shall be Type D electric/electric release trim
consisting of the following components:
•Hydraulic trim shall be galvanized and brass com-
ponents specifically Listed/Approved with the de-
luge valve, including associated pressure gauges,
1¼” drain connection, alarm device, alarm test, and
push-rod chamber connections.
•Electrical two-way, normally-closed, pilot-operated
solenoid valve [cULus Listed] [FM Approved] for its
intended use. The solenoid valve shall be con-
structed of a brass body with stainless steel sleeve
tube, springs, stop and plunger, and with ½” female
NPT end connections. Solenoid valve shall have a
maximum working pressure of [175 psi (12,1 bar)]
[250 psi (17,2 bar)] and maximum ambient temper-
ature rating of 150°F (66°C). Power consumption of
integrated coil shall be limited to [10watts (175 psi
(12,1 bar) Rated] [22 watts (250 psi (17,2 bar)
Rated] and require 24 VDC from a releasing/control
panel listed for such service. Solenoid valve shall be
a Skinner ½” normally-closed solenoid valve,
[Model 73218BN4UNLVNOC111C2 (175 psi (12,1
bar) Rated] [Model 73212BN4TNLVNOC322C2
(250 psi (17,2 bar) Rated].
•Low air pressure switch to indicate loss of air pres-
sure in system piping. Pressure switch shall be
[cULus Listed] [FM Approved] and of the bel-
lows-activated type enclosed in a weatherproof, 4x,
NEMA 4-rated enclosure incorporating tamper-re-
sistant screws. There shall be two sets of SPDT
(Form C) contacts rated at 10.0 A @ 125/250 VAC
and 2.5 A @ 6/12/24 VDC. The pressure switch shall
have a maximum service pressure rating of 250 psi
(17,2 bar) and shall be factory adjusted to operate at
apressureof4to8psi(0,27to0,55bar)withadjust
-
ment up to 20 psi (1,3 bar). Switch shall be provided
with a ½” NPT male pressure connection. Low air
alarm pressure switch shall be System Sensor
EPS10-2.
•Pressure maintenance device for maintaining a
constant system pneumatic pressure regardless of
pressure fluctuations in the compressed air (or nitro-
gen) source. The pressure maintenance device
shall consist of galvanized trim and brass parts, in-
cluding a strainer, a field adjustable air pressure
regulator, and associated pressure gauge. The
pressure regulator shall have an adjustable outlet

9.
pressure range of 5 to 50 psi (0,34 to 3,4 bar). The
pressure maintenance device shall have aworking
pressure rating of 175 psi (12,1 bar). Recom-
mended pneumatic supervisory pressure shall be
10 psi (0,70 bar). Pressure maintenance device
shall be Reliable Model A-2.
Double Interlock Preaction System shall be a Reliable
Double Interlock Type D Preaction System, Bulletin 737.
Pneumatic Supervisory Pressure Supply Options
Owner’s Air supply
Air supply shall be provided by an owner-supplied air
system.
Compressed Air Supply
Air supply shall be provided by an automatic
tank-mounted air compressor sized (appropriate hp) for
the capacity (volume) of the sprinkler system piping, and
be capable of restoring normal air pressure in the system
within 30 minutes. Tank mounted compressor shall be a
motor mounted, oil-less, piston compressor, including
gauge, pressure switch, check valve, drain valve, and
safety relief valve. Single-phase motor shall have internal
thermal protection.
Nitrogen
Nitrogen cylinders provided by an approved source
shall provide the nitrogen supply. The nitrogen cylinder
pressure shall be regulated and supervised through the
use of nitrogen regulating device and low-pressure trim
kit. This device shall consist of a brass, single stage pres-
sure regulator, equipped with high pressure inlet and low
pressure outlet gauges, and ¼” copper connection tub-
ing with galvanized ¾” x ¼” reducer bushing. Optional:
Low-pressure trim kit shall be included to monitor the reg-
ulated nitrogen supply pressure to provide a low-pressure
supervisory alarm. This kit shall include a low-pressure
switch with associated galvanized connection trim. As-
sembly shall be a Reliable Nitrogen Regulating Device
This device is to be used in conjunction with the Reliable
Model A-2 Pressure Maintenance Device.
Optional System Accessories
System Control Valve
Preaction system control valve shall be a slow close,
[cULus Listed] [FM Approved] indicating butterfly type
valve with a pre-wired supervisory tamper switch assem-
bly. The valve shall be rated for a working pressure of
[175 psi (12,1 bar)] [250 psi (17,2 bar)]. System control
valve shall be a [2” (50 mm)] Nibco KG-505-w-8 Ball
Valve, [212” (65 mm)] [3” (80 mm)] Nibco GD-4765-8N
Butterfly Valve.
Detection System
To initiate actuation of the preaction system’s deluge
valve, a supplemental electric detection system shall be
provided [Insert applicable product specification].
Releasing/Control Panel
A releasing/control panel shall be used to operate the
preaction system. The releasing/control panel shall be a
conventional, microprocessor-controlled panel contain-
ing two initiating device circuits, and waterflow and super-
visory inputs. Output circuits shall include alarm,
waterflow, supervisory, and releasing circuits. Mode of
operation shall be set for cross-zoned operation, requiring
both a detection device input and a low air pressure
switch input (sprinkler operation) to energize the solenoid
valve, causing the deluge valve to actuate. Releas-
ing/control panel shall be equipped with a local tone
alarm to annunciate loss of AC power, system trouble, cir-
cuit trouble, and low auxiliary DC power supply. Panel
shall be [cULus Listed] [FMApproved] and be capable of
providing power for compatible detectors and auxiliary
devices used. Audible alarms shall be able to be silenced
at releasing panel. Auxiliary DC power supply shall con-
sist of (2) 12-volt lead acid batteries of the same ampere-
hour rating, providing [60 hours – cULus Listed] [90 hours
– FM Approved]. Dry contacts shall be provided for re-
mote annunciation of alarm, trouble, and supervisory
panel signals. Main power supply to be a dedicated 120
VAC / 60Hz circuit.
Waterflow Alarm Pressure Switch
Alarm pressure switch shall be provided to indicate
water flow and provide a water flow alarm. Pressure
switch shall be [cULus Listed] [FM Approved] and of the
bellows activated type enclosed in a weatherproof, 4x,
NEMA 4-rated enclosure incorporating tamper-resistant
screws. There shall be two sets of SPDT (Form C) con-
tacts rated at 10.0 A @ 125/250 VAC and 2.5 A @ 6/12/24
VDC. The pressure switch shall have a maximum service
pressure rating of 250 psi (17,2 bar) and shall be factory
adjusted to operate at a pressure of 4 to 8 psi (0,27 to 0,55
bar) with adjustment up to 20 psi (1,3bar). Switch shall be
provided with a ½” NPT male pressure connection.
Waterflow alarm pressure switch shall be System Sensor
EPS10-2.

Technical Data
Reliable Type D Double Interlock Preaction Systems,
with associated trim, sizes 2” (50mm), 2½" (65mm), 3”
(80mm) and 76mm, are rated for use at minimum water
supply pressure of 20 psi (1,4 bar) and maximum supply
pressure of 250 psi (17,2 bar). Water supplied to the inlet
of the valve and to the pushrod chamber must be main-
tained between 40°F (4°C) and 140°F (60°C).
The following list of technical bulletins pertains to
valves and devices that may be used in this preaction
system:
Valve Description
1. Rated working pressure:
Valve & System- 250 psi (17,2 bar)
2. Factory tested to a hydrostatic pressure of 500 psi
(34,5 bar). (Valve only)
3. End and trim connections:
•ANSI/AWWA C606 grooved inlet and outlet
•Threaded openings Per ANSI B 2.1
•Valve Exterior Color:
4. Face to face dimensions:
•2" (50mm) — 12-1/2" (318mm)
•2.5" (65mm) — 12-1/2" (318mm)
•3" (80mm) — 12-1/2" (318mm)
•76mm - 12-1/2" (318mm)
Groove Dimensions
Valve
Size
Outlet
Diameter
Groove
Diameter
Groove
Width
Outlet Face
to Groove
2" (50mm) 2.375" (60mm) 2.250" (57mm)
1132"
(9mm)
58"
(16mm)
2.5"(65mm) 2.875" (73mm) 2.720" (69mm)
3" (80mm) 3.500" (89mm) 3.344" (85mm)
76mm 3.000" (76mm) 2.845" (72mm)
Valve Size Color
2" (50mm)
2.5" (65mm)
3" (80mm)
Black
76mm Red
5. Shipping weight:
6. Friction loss (Expressed in equivalent length of Schedule
40 pipe, based on Hazen & Williams formula with C=120
and a flow velocity of 15ft/sec (4.6 m/sec)):
7. Installation position: Vertical
Maintenance
Reliable Double Interlock System and associated
equipment shall periodically be given a thorough inspec-
tion and test. NFPA 25 Inspection, Testing and Mainte-
nance of Water Based Fire Protection Systems provides
minimum maintenance requirements. The double inter-
lock system shall be tested, operated, cleaned and in-
spected at least annually and parts replaced as required.
Resetting the Type D Double Interlock
Preaction System
Refer to Figs. 2, 5, and 6.
1. Close the main valve controlling water supply (Fig. 6) to the
Deluge Valve and close the ¼” globe valve controlling sys-
tem air pressure in the Model A-2 Pressure Maintenance
Device.
2. Close the pushrod chamber supply valve, valve A (Fig. 6).
3. Open the main drain valve, valve B (Fig. 6), and drain sys-
tem.
4. Open all drain valves and vents at low points throughout
the system, closing them when flow of water has stopped.
Open valve D (Fig. 6).
5. Note: The above steps accomplish the relieving of pres-
sure in the pushrod chamber of the Deluge Valve.
6. With valve G (Fig. 6) open, push in the plunger of ball drip
valve, valve E (Fig. 6), to force the ball from its seat, and
drain any water in the alarm line.
7. With the Model B Manual Emergency Station, valve D (Fig.
6), open, push in and rotate the Deluge Valve’s external re-
set knob (#14, Fig. 5) 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 condi-
tions (0 psig).
8. Inspect and replace any portion of the sprinkler system
subjected to fire conditions.
9. Open valve A (Fig. 6) and allow water to fill the Deluge
Valve’s pushrod chamber. Close valve D (Fig. 6).
10. Bleed any air from the actuation piping by energizing
the solenoid valve. This is done by operating a detec-
tor or an electric manual emergency station. While
water is flowing through the solenoid valve, cause it to
close. Refer to Bulletin 700, “Special Hazards & Spe-
cial Systems” for details.
10.
Deluge Valve Reliable 512/513
Hydraulic Emergency Station (Model A) Reliable 506
Solenoid Valve Reliable 718
Mechanical Sprinkler Alarm Reliable 612/613
Pressure Maintenance Device Reliable
250/251/253
Nitrogen Regulating Device Reliable 253
Air Compressor Reliable 707/708
Releasing/Control Panel Potter #5403550
Electric Emergency Station Reliable 700
Thermal Detectors Reliable 722
Fire Alarm Devices Reliable 700
Low Air Pressure Supervisory Switch System Sensor
A05-0176
Waterflow Pressure Alarm Switch System Sensor
A05-0176
Valve Size Weight
2" (50mm)
2.5" (65mm)
3" (80mm)
76mm
34lb. (15 kg)
Valve Size Equivalent Length
2" (50mm) 4.4' (1.3m)
2.5" (65mm) 6.0' (1.8m)
3" (80mm) 12.6' (3.8m)
76mm 7.7' (2.3m)

11.
Note: All detection devices must be reset before the
releasing/control panel can be reset.
11. Close valve G (Fig. 6). Open the ¼” globe valve in the
Model A-2 Pressure Maintenance Device to restore air
pressure in the sprinkler system.
12. Open valve G (Fig. 6). Open slightly the main valve
controlling water supply (Fig. 6) to the Model DDX De-
luge Valve, closing drain valve B (Fig. 6) when water
flows. Observe if water leaks through the ball drip
valve, valve E (Fig. 6), into the drip cup, J (Fig. 6). 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 (Fig. 6) and valve G (Fig. 6) are
open.
14. Secure the handle of the Model B Manual Emergency
Station, valve D (Fig. 6), in the OFF position with a ny-
lon tie (#58, Fig. 2).
Inspection and Testing
Refer to Figs. 2, 5, and 6.
1. Water supply — be sure the valve(s) controlling water
supply to the Deluge Valve are opened fully and properly
monitored.
2. Alarm line — be sure that valve G (Fig. 6) is opened and
remains in this position.
3. Other trimming valves — check that valve A (Fig. 6) is
open as well as all of the pressure gauge’s ¼” 3-way
valves. Valves D, F, and H (Fig. 6) should be closed.
4. Ball drip valve E (Fig. 6) — make sure that valve G
(Fig.6) is open. 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 (see
Fig. 5) on the underside of the push rod chamber for leak-
age.
5. System pneumatic pressure — check that system air
pressure is between 7 and 10 psi (0,5 bar 0,7 bar).
Check the Model A-2 Pressure Maintenance Device for
leakage and proper pressure.
6. Releasing device — check outlet of the releasing device
(i.e., solenoid valve or the Model B Manual Emergency
Station, valve D (Fig. 6)) for leakage. Also verify that tub-
ing drain lines from releasing devices are not pinched or
crushed which could prevent proper releasing of the De-
luge Valve.
7. Testing alarms — make sure that valve G is open. Open
valve F (Fig. 6) permitting water from the supply to flow to
the electric sprinkler alarm switch and to the mechanical
sprinkler alarm (water motor). After testing, close this
valve securely. Push in on the plunger of ball drip valve E
(Fig. 6) until all of the water has drained from the alarm
line.
8. Operational test — Open the Model B Manual Emer-
gency Station, valve D (Fig. 6), or operate by electrical ac-
tuation (refer to Bulletin 700, “Special Hazards & Special
Systems” for details). Note: An operational test will
cause the Deluge Valve to open and flow water into the
sprinkler system.
9. Secure Model B Manual Emergency Station, valve D (Fig.
6), in the OFF position with a nylon tie (#58, Fig. 2) after the
Deluge Valve is reset.
Fig. 5

12.
Item
No.
Part Number Part Description No.
Req'd
2" Valve 212" Valve 3" Valve 76mm
1 91006011 91006012 91006013 91006023 Body, Machined 1
2 94617001 94617002 94617003 94617004 Plate, Size 1
3 92126066 Cover, Pushrod 1
4 91106123 Screw, Hex Cap, ½-13 x 1¼", ZN PLTD, Grade A 6
5 91306013 Mounting Ring, Machined 1
6 91916003 Clapper, Machined 1
7 92116063 Cover, Access, Machined 1
8 93416003 Seal Assembly 1
9 93706003 Gasket, Access Cover (not shown) 1
10 93722000 Bumpstop Assembly 1
11 93916006 Pushrod, Guide 1
12 93916066 Shaft, Reset 1
13 94106066 Housing, Reset 1
14 94356006 Knob, Reset 1
15 94506003 Lever 1
16 94617000 Adhesive, Backing Pad (not shown) 1
17 95106006 Piston, Machined 1
18 95276006 Diaphragm 1
19 95306268 Clip, Retaining, 3/8" Shaft 4
20 95406007 O-Ring, (114) 1
21 95406024 O-Ring, (912) 2
22 95406407 O-Ring, (014) 1
23 95406410 O-Ring, (150) 1
24 95406411 O-Ring, (147) 1
25 95506003 Pushrod 1
26 95606114 Screw, Socket Head, Ø ¼"-20 x 5/8" 6
27 95606127 Screw, Ø 3/8"-16 x ¾", Socket Cap, Flat Head 1
28 95606133 Screw, Cap, #6-32 x ½", SS 1
29 96016003 Seat Machined 1
30 96206003 Pin, Hinge 1
31 96216003 Pin, Lever 1
32 96310003 Spacer, Clapper Pin 2
33 96406003 Spring, Lever 1
34 96406906 Spring, DDX 2
35 96906112 Washer, Lock, #6, SS 1
36 94206406 Inlet, Orifice 1
37 94616921 Label, Caution Knob (not shown) 1
38 91556922 Ball Chain, 1/8" (not shown) 6
39 91556923 Clamping Link, Ball Chain (not shown) 1
40 85000050 Grease, GPL-201 (not shown) A/R
41 95006414 Striker, Lever/Clapper 1
42 95606140 Screw, Socket Head ¼-20 x 3/8”, SS 2
Models DDX 2" (50mm), 2½" (65mm), 3" (80mm) & 76mm Deluge Valve Parts List

13.
Testing the Model DDX Deluge Valve Without
Flowing Water
Refer to Fig. 6
1. Close the valve controlling water supply to Deluge Valve
and open the main drain valve B.
2. Verify that valve A is open, allowing water to enter the push
rod chamber.
3. Operate detection systems – energize the solenoid valve
by operating both a detector and the low air pressure
switch (refer to Bulletin 700, “Special Hazards & Special
Systems” for details).
4. Operation of the detection system will result in a sudden
drop of water pressure in the push rod chamber.
5. Reset detection system — reverse operations performed
in step three above and then proceed according to the di-
rections listed in the “Resetting the Type D Double Inter-
lock Preaction System” section of this bulletin for resetting
the Deluge Valve.
Draining Excess/Condensate Water From System
Refer to Fig. 6
1. Close the main valve controlling water supply to Deluge
Valve. Also close valve A and open main drain valve B.
2. Open condensate drain valve H until all water has
drained. Close valve H. 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
tripping the low air pressure switch causing an undesir-
able alarm condition.
3. Close main drain valve B. If system contains pressurized
air, allow air pressure to come back up to specification.
Open valve A first, and then open the main valve control-
ling the water supply to the Deluge Valve.
Maintenance Procedures - Model DDX Deluge
Valve
Refer to Figs. 2, 5, & 6.
1.Mechanical sprinkler alarm (water motor–not
shown) not operating:
This is most likely caused by a clogged screen in the
strainer of the water motor. Proceed as follows: Re-
move plug from the strainer. Remove and clean the
screen. Replace the screen and the plug, and then
tighten securely (Ref. Bulletin 613).
2. Leakage out of the ball drip valve E (Fig. 6).
a. Water leakage due to a water column above the
Deluge Valve’s clapper:
This condition can be caused by leakage past the
system side of the Model DDX Deluge Valve’s seal
faceplate subassembly (#8, Fig. 5). Be sure that this
surface is free of any type of debris. To eliminate
leakage due to a water column, refer to the section in
this bulletin marked “Draining Excess/Condensate
Water From System”. If the problem continues pro-
ceed to the following section.
b. Leakage, air or water from the ball drip valve, E
(Fig. 6):
If system air is leaking out the ball drip valve, the prob-
lem is either damage to the airside of the Model DDX
Deluge Valve’s seal faceplate subassembly (#8, Fig. 5),
seat (#29, Fig. 5),or the upper seat O-ring (#23, Fig. 5). If
supply water is leaking out the ball drip valve, the prob-
lem could be caused by damage to the Model DDX De-
luge Valve’s seal faceplate sub-assembly (#8, Fig. 5),
seat (#29, Fig. 5), or lower seat O-ring (#24, Fig. 5). The
following section provides instructions to correct both
conditions:
A) Shut down the valve controlling the water supply to
the Deluge Valve and open the 1-1/4” main
drain valve B (Fig. 6). Open the water column
drain valve H (Fig. 6). Close the push rod cham-
ber supply valve A (Fig. 6) and open the Model B
Manual Emergency Station D (Fig. 6).
B) Remove the Deluge Valve’s front (handhold) cover
(#7, Fig. 5) and inspect the seat (#29, Fig. 5), clap-
per (#6, Fig. 5),and seal faceplate subassembly
(#8, Fig. 5) for damage.
If inspection indicates damage to the seal faceplate
sub-assembly (#8, Fig. 5), replace as follows:
Remove the bump stop nut subassembly (#10, Fig. 5)
and remove the seal assembly (#8, Fig. 5). Install a new
seal assembly (#8, Fig. 5) and thread the bump stop nut
(#10, Fig. 5) onto the threaded stud of the seal sub-as-
sembly (#8, Fig. 5) and tighten finger tight plus ¼ to ½
turn.
If inspection indicates damage to the clapper (#6, Fig.
5) only, then the clapper sub-assembly can be re-
moved as follows:
At the rear of the valve, disconnect the water column
drain trim section starting with the elbow connector
(#23, Fig. 2). Then remove the ¼" angle valve (#63, Fig.
2), followed by the ¾" x ¼" reducing bushing (#7, Fig. 2).
Remove the retaining ring (handhold cover side) from
the clapper hinge pin (#30, Fig. 5) and push this pin
through the water column drain line and remove the
clapper subassembly. Replace the seal sub-assembly
as described previously. Inspect the clapper (#6, Fig.
5) visually before reinstalling. Reinstall in the reverse or-
der making sure the clapper spacers are in their proper
position. If the seat (#29, Fig. 5) is damaged or it is sus-
pected that the leakage is through the lower O-ring
(#24, Fig. 5), the seat-clapper subassembly is easily re-
movedasaunitasfollows:
Using Reliable P/N 6881603000 Seat Wrench, remove
the seat by unscrewing. This will loosen the seat-clap-
per-mounting ring subassembly. Reach into the valve
and grasp the seat-clapper subassembly and remove it
from the valve. Visually examine all components of the
seat-clapper-mounting ring sub-assembly replacing
any component that appears damaged. New O-rings
(#23 & #24, Fig. 5) should always be used for reassem-
bly.

14.
Fig. 6

15.
Reassembly:
Clean the bore of the valve body. Lubricate the bore
with O-ring grease. Lubricate and install the O-rings
(#23 & #24, Fig. 5) onto the seat. Insert the seat-clap-
per-mounting ring sub-assembly into the handhold
opening of the Deluge Valve. Align the mounting ring
so that the Lever (#15, Fig. 5) is near the pushrod
(#25, Fig. 5) and the mounting ring (#5, Fig. 5) “ears”
are between the tabs of the valve body (#1, Fig.
5).Start to tread the seat (#29, Fig. 5) into the body by
hand, then tighten until the seat (#29, Fig. 5) with seat
wrench 6881603000
until it bottoms out on the mounting ring (#5, Fig. 5).
Verify that the seat-clapper-mounting ring subassem-
bly is in the fully down position between the tabs of the
body, and check to see that the lever (#15, Fig. 5)
lines up with the push rod (#25, Fig. 5). Loosen and
reassemble if necessary. Reassemble the handhold
cover (#7, Fig. 5) and set up the Model DDX Deluge
Valve as per the section “Resetting Model DDX De-
luge Valve Systems.”
3. Leakage out of the push rod chamber vent hole:
A small bleed hole is located on the underside of the
push rod chamber (see Fig. 5). If there is air or water
leakage coming out of this hole, do the following:
a) Shut down the valve controlling water supply to the
Deluge Valve. Relieve the inlet pressure by open-
ing the main drain valve B (Fig. 6). Close the valve A
(Fig. 6) that supplies water to the push rod cham-
ber, and open the Model B Manual Emergency Sta-
tion, valve D (Fig. 6).
b) Remove the trim at the unions nearest to the push-
rod chamber cover (#3, Fig. 5)
c) Take the push rod chamber cover (#3, Fig. 5) off by re
moving the six retaining screws (#26, Fig. 5).
CONDITION ONE (Water coming out of the bleed
hole):
Water coming out of the bleed hole is caused by a leak-
ing diaphragm (#18, Fig. 5). Visually inspect the push
rod chamber cover (#3, Fig. 5) and piston (#17, Fig. 5)
to determine what could have damaged the diaphragm
and correct. Install a new diaphragm. NOTE: The dia-
phragm has two different surfaces, it is not bi-direc-
tional. It will fail if installed backwards! Roll the
diaphragm so that the smooth surface (the pressure
side) conforms to the inside of the push rod chamber
cover and reassemble the six retaining screws (#26,
(Fig. 5) with an installation torque of 15 foot-pounds. Set
up the Model DDX Deluge Valve as per the section “Re-
setting the Type D Double Interlock Preaction System”
175 psi
(12,1 bar)
Rated
Solenoid Valve
250 psi
(17,2 bar)
Rated
Solenoid Valve
175 psi
(12,1 bar)
Rated
Solenoid Valve
250 psi
(17,2 bar)
Rated
Solenoid Valv
{
{
UL/FM
Approved
Pressure
Switch
ULC
Listed
Pressure
Switch
Ordering Information
Specify
•Valve Model & Size 2” (50mm) Model DDX Deluge Valve (P/N 6103022000), 2½” (65mm) Model DDX Deluge
Valve (P/N 6103022500), 3” (80mm) Model DDX Deluge Valve (P/N 6103030000), 76mm Model DDX Deluge Valve
(P/N 6103027600).
•Trim — The trim set is available in individual parts, in time-saving segmentally assembled kit forms, or fully assem-
bled to the Model DDX Deluge Valve with or without a control valve.
•Solenoid Valve 175 psi 912,1 bar) or 250 psi (17,2 bar) rated. Explosion-proof Solenoid Valve available upon re-
quest.
•Low Air Pressure Switch UL/FM Approved (System Sensor EPS 10-2) or ULC Listed (System Sensor Model
EPSA 10-2)
Trim Part Numbers
Trim Configurations 2" (50mm)
Valve
2½" (65mm)
Valve
3" (80mm)
Valve 76mm Valve
Fully Assembled to DDX Valve w/Control Valve 6505020025 6505022525 6505030025 -----
Fully Assembled to DDX Valve w/o Control Valve 6505020026 6505022526 6505030026 6505027626
Segmented Assembled (DDX valve Sold Separately) 6503002438
Individual Parts (DDX Valve Sold Separately 6503002437
Fully Assembled to DDX Valve w/Control Valve 6505020045 6505022545 6505030045 ------
Fully Assembled to DDX Valve w/o Control Valve 6505020046 6505022546 6505030046 6505027646
Segmented Assembled (DDX valve Sold Separately) 6503002446
Individual Parts (DDX Valve Sold Separately 6503002445
Fully Assembled to DDX Valve w/Control Valve 6505020055 6505022555 6505030055 -----
Fully Assembled to DDX Valve w/o Control Valve 6505020056 6505022556 6505030056 6505027656
Segmented Assembled (DDX valve Sold Separately) 6503002442
Individual Parts (DDX Valve Sold Separately 6503002441
Fully Assembled to DDX Valve w/Control Valve 6505020065 6505022565 6505030065 ------
Fully Assembled to DDX Valve w/o Control Valve 6505020066 6505022566 6505030066 6505027666
Segmented Assembled (DDX valve Sold Separately) 6503002450
Individual Parts (DDX Valve Sold Separately 6503002449
{
{
{
{
Note: For metric installations, a 1¼" NPT x R1¼, ISO 7/1 x Close Nipple (Reliable P/N 98543403) is sold Separately as an
adapter for the single drain outlet of the trims.

16.
System Equipment Manufacturers
(A) Notifier (D) System Sensor
(B) The Reliable Automatic Sprinkler Co., Inc. (E) Gast Manufacturing Corp.
(C) Potter Electric Signal Company
•Additional Equipment (Refer to Fig. 7)
Item No. Component Part Mfgr. Description Technical
Bulletin
1
Water Supply Control Valve Select Ball Valve, 2" (50mm) -
Butterfly Valve 2½" (65mm), 3" (80mm), 76mm -
Tamper Switch (Optional) for OS&Y Valve
D
Model OS&Y2 System Sensor
A05-0196
(Optional) for Butterfly Valve Model P1BV2 System Sensor
A05-0197
2 Deluge Valve B Model DDX, 2" (50mm), 2½" (65mm), 3" (80mm), 76mm Reliable
512 / 513
3 Double Interlock Trim Kit (Type D) B Refer to Parts List in this Bulletin Reliable 737
4 Waterflow Alarm / Low Air Pressure Switch D Model EPS10-2 (DPDT, UL, FM) System Sensor
A05-0176
Model EPSA10-2 (DPDT, ULC)
5 Mechanical Alarm (Optional) B Model C Reliable
612 / 613
6
Releasing / Control Panel
C
Model PFC-4410-RC
Potter #5403550
Reliable 700
Batteries 12 VDC, 12 AMP Hours (90 Hours Backup) FM
12 VDC, 7 AMP Hours (60 Hours Backup)
Optional Accessories
CA2Z (Class A Wiring Module for Initiating Circuits)
CAM (Class A Wiring Module for Indicating Circuits)
ARM-1 / ARM-2 (Auxiliary Relay Module)
RA-4410-RC (Remote Annunciator)
7 Alarm Annunciator A
Model SSM24-8 24 VDC / Polarized Bell
Reliable
700
Model SSM24-10 24 VDC / Polarized Bell
Model MA24-D 24 VDC / Polarized Sounder
Model MASS24LO 24 VDC / Polarized Sounder Strobe
8 Trouble Annunciator A Model SSM24-6 24 VDC / Polarized Bell Reliable
700
Model MA24-D 24 VDC / Polarized Sounder
9 Manual Emergency Station (Elec.) A Model BNG-1 (SPDT) 1 & 2 Area Detection Reliable
700
Model BNG-1F (DPDT) Cross Zoned Detection
10 Detection Various Smoke, Heat Detectors, etc. Reliable 700
11 Sprinklers B Closed Type
Reliable 110,
117, 131, 136,
etc.
12 Air Compressor E Tank Mounted Gast H-10-0801
13 Nitrogen Regulating Device B Regulator with Optional Low Air Pressure Switch Reliable 253

17.
Fig .7

Installation Dimensions
Installation Dimensions in Inches (mm)
VALVE A B C *D E F G H J K L M N P Q R
2" (50mm)
2½" (65mm)
3" (80mm)
& 76mm
734
(197)
6½
(165)
8
(203)
12½
(318)
19
(483)
32½
(826)
1714
(438)
634
(171)
814
(210)
3½
(89)
5¼
(133)
934
(248)
5½
(140)
334
(95)
214
(57)
6
(152)
* Total take out dimension for Fully Assembled to DDX Valve w/Control Valve Configurations:
2"-20
732,2 12"&3"-17 27 32", 76 mm - N/A.
18.

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 OT 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 ba-
sis. 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 operated at least monthly. The valve must open and close freely. When open, the water flow
must be clear and clean at the proper flow rate. When closed, a total water shut-off must be observed.
3. The valve must be inspected at least monthly for cracks, corrosion, leakage, etc., and cleaned, repaired, or re-
placed, or replaced as necessary.
4. At least annually, the valve diaphragms and seats must be inspected and if necessary, repaired or replaced.
WARNING: CLOSE SYSTEM CONTROL VALVE, TURN OFF POWER SUPPLY, AND DEPRESSURIZE VALVE
BEFORE DISASSEMBLING VALVE. IT IS NOT NECESSARY TO REMOVE THE VALVE FROM THE PIPE LINE TO
MAKE INSPECTIONS.
5. When lubricating valve components, use high grade silicone grease (Dow Corning® 111 Compound Lubricant or
equal).
6. When reassembling, tighten parts to torque values indicated in the manufacturer’s maintenance instructions
(packed with valve).
7. After maintenance is completed, operate the valve a few times to be sure of proper operation. A metallic “click” sig-
nifies the solenoid is operating.
8. It is recommended that the valve be replace at seven-year intervals. Shorter intervals may be required if the valve is
subject to corrosive water supplies or atmospheres.
9. All service must be performed by qualified personnel. Upon completion of inspections or replacement of the valve,
the entire system must be checked for proper operation. See appropriate system description and testing instruc-
tions for additional information.
19.

The equipment presented in this bulletin is to be installed in accordance with the latest published Standards of the National Fire Protection Association, Factory
Mutual Research Corporation, or other similar organizations and also with the provisions of governmental codes or ordinances whenever applicable.
Products manufactured and distributed by Reliable have been protecting life and property for over 90 years, and are installed and serviced by the most highly
qualified and reputable sprinkler contractors located throughout the United States, Canada and foreign countries.
The Reliable Automatic Sprinkler Co., Inc.
[phone] Sales Offices
[phone] Sales Fax
[phone] Corporate Offices
www.reliablesprinkler.com Internet Address
Manufactured by
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Reliable...For Complete Protection
Reliable offers a wide selection of sprinkler components. Following are some of the many
precision-made Reliable products that guard life and property from fire around the clock.
•Automatic sprinklers
•Flush automatic sprinklers
•Recessed automatic sprinklers
•Concealed automatic sprinklers
•Adjustable automatic sprinklers
•Dry automatic sprinklers
•Intermediate level sprinklers
• Open sprinklers
• Spray nozzles
• Alarm valves
• Retarding chambers
• Dry pipe valves
• Accelerators for dry pipe valves
• Mechanical sprinkler alarms
• Electrical sprinkler alarm switches
•Water flow detectors
•Deluge valves
•Detector check valves
•Check valves
•Special hazards & special systems
•Sprinkler emergency cabinets
•Sprinkler wrenches
•Sprinkler escutcheons and guards
• Inspectors test connections
• Sight drains
• Ball drips and drum drips
• Control valve seals
• Air maintenance devices
• Air compressors
• Pressure gauges
• Identification signs
•Fire department connection