Reliable EX Series User Manual

CONDITION TWO (System Air coming out of the
bleed hole):
System air coming out of the bleed hole is caused by a worn O-ring
assembled to the pushrod guide. Remove the piston-pushrod
subassembly, pushrod spring, and pushrod guide. installation
torque for the pushrod guide is 35 inch-pounds. CAUTION: Do
not over tighten the pushrod guide. Reassemble the components
that were initially removed. Re-install the diaphragm if it appears
to be in good shape, otherwise, replace it also. NOTE: The
diaphragm has two different surfaces; it is not bi-directional. It will
fail if installed backwards! Roll the diaphragm so that the smooth
surface (the pressure side) conforms to the inside of the pushrod
chamber cover and the fabric side engages the pushrod, and
reassemble the six retaining screws with an installation torque of
15 foot-pounds in a star pattern. Set up the Model EX Valve as per
the section “Resetting Model EX Valve Single Interlock Preaction
Systems”.
Listing & Approvals
The LPCB approval for Single Interlock Preaction systems states
the system must comply with the general requirements of the
“LPC Rules for Automatic Sprinkler Systems (incorporating
EN12845)” and in particular Technical Bulletin 208 “Supplemen-
tary requirements for sprinkler installations which can operate in
the dry mode”.
Loss Prevention Certication Board (LPCB)
Installation Requirements of Preaction Systems Include:
1. The equipment must be installed, congured and maintained
in accordance with the manufacturers specications, by
appropriately trained personnel.
2. The system shall be electrically monitored and be capable of
indicating “ready to operate” at all times.
3. Detectors should be LPCB approved and must be compatible
with the Control Panel.
4. Connecting cables shall comply with BS6387 (classication
C, W, Z).
5. Two LPCB approved Solenoid Valves shall be installed in
parallel, shall function in the pneumatic condition only and be
protected by a strainer.
6. Clean dry air (or Nitrogen) shall be used. An air maintenance
device shall be used, such that the inflow of air cannot
exceed the egress of air through one sprinkler, or any other
means of operating the valve.
Ordering Information
Specify:
Model EX Single Interlock Preaction System Type A
• Size
• 2” (50mm)
• 2-1/2” (65mm)
• 3” (80mm)
• 76mm
• 4” (100mm)
• 6” (150mm)
• 165mm
• 8” (200mm)
• End Conguration
• See Table A
Service Kits
Service kits are available for routine servicing of the valve (refer-
ence assembly drawings on website). Service kits for the Model
EX Single Interlock Preaction Type A valve include the following
components:
• Clapper Seal Assembly (item 8)
• Cover Gasket (item 9)
• Bumpstop(s) (item 10)
• Push rod chamber diaphragm (item 18)
• Pneumatic Actuator Diaphragm Assembly (items 41, 42, 43,
and 44)
• Grease (item 50)
2”, 2-1/2”, & 3” Model EX Service Kit: PN 6501200R09
4” Model EX Service Kit: PN 6501200R10
6” Model EX Service Kit: PN 6501200R11
8” Model EX Service Kit: PN 6501200R12
9.
Bulletin 739
January 2021
Page 9 of 9
www.reliablesprinkler.com

Reliable EX Series Specifications

General

Brand	Reliable
Model	EX Series
Category	Control Unit
Language	English