Bulletin 739 Instructions for Installation, Operation Care and Maintenance For Single Interlock Preaction Systems With Dual Solenoid Actuation Of Pneumatic Pilot Release 4"(100mm), 6"(150mm) & 165mm Sizes with Trim • LPCB Approved • Redundant Solenoid Valve Release • Rated to 175 psi (12.1 bar) • Externally Resetable Clapper • One Main Drain The Reliable Automatic Sprinkler Co., Inc.
General Description A. A fire alarm sounds prior to the operation of a sprinkler head, which may enable extinguishing the fire by handheld means before the actual operation of any sprinklers and subsequent water damage. Reliable Single Interlock Preaction Systems are designed for water-sensitive areas that require protection from inadvertent water flow into the sprinkler system piping.
Loss Prevention Certification Board (LPCB) Installation Requirements of Preaction systems Include: 1. Solenoid valves shall be installed in parallel. 2. Solenoid valves shall function in pneumatic conditions only, and be protected by a strainer. 8. Pre-action system equipment shall be installed, operated and maintained as prescribed in the firm’s installation , operating and maintenance manual. 3. LPCB Certified detectors compatible with the control and indicating equipment shall be used. 9.
Fig. 2 3.
SINGLE INTERLOCK PREACTION SYSTEM PARTS LIST (REFER TO FIG. 2) ITEM NO.
Fig. 3 System Operation To fully operate a Reliable Single Interlock Preaction System, two independent events must coexist before water flow will occur. One electrical detector (two detectors in a cross-zoned system) must activate and a sprinkler head must open. Operation of either one of these items will only cause an alarm to annunciate, but will not cause water to discharge from the sprinkler system piping.
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.
Fig. 4 8.
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Technical Data formula with C=120 and a flow velocity of 15ft/sec (4.6 m/sec)): 7. Installation position: Vertical Reliable Single Interlock Preaction Systems, with associated trim, sizes 4” (100mm), 6” (150mm) and 165mm 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 maintained between 40°F (4°C) and 140°F (60°C).
9. Upon seeing a solid flow of water from the drain tubing, and the cessation of the “gurgling” sound at the drip cup, H (Fig. 7), close valve D (Fig. 7) then rapidly apply compressed air or nitrogen into the to chamber of the Model LP Dry Valve Actuator until the pressure conforms to Table A levels as indicated on the air pressure gauge. The Model LP Dry Valve Actuator will close during this pressurizing process and the water will stop flowing into the drip cup.
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Fig. 7 13.
If the seat (#2, Fig. 6) is damaged or it is suspected that the leakage is through the lower O-ring (#11, Fig. 6), the seat-clapper subassembly is easily removed as a unit as follows: Using a 5/16” Allen wrench, remove the two 3/8” NPT pipe plugs (#19 (not shown) Fig. 6) located on the side of the Model DDX Deluge Valve. The seat-clapper subassembly is retained by two locking pins (#17 (not shown) Fig. 6). The centers of these pins have a ¼”-20 threaded hole.
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 push rod chamber cover and re-assemble the six retaining screws (#29, Fig. 6) with an installation torque of 15 foot-pounds. Set up the Model DDX Deluge Valve as per the section of this bulletin entitled “Resetting the Single Interlock Preaction System”.
Maintenance – Model LP Dry Valve Actuator Model LP Dry Valve Actuator Parts List P/N 71030010 Refer to Fig. 8 Item No. Part No. 1 2 3 4 5 6 7 8 94106936 94106935 96006905 92206311 95106911 96906311 94906406 95406901 9 10 Description Qty. Required 1 1 1 1 1 1 1 1 95606305 Lower Housing Upper Housing Seat Diaphragm Facing Plate Assembly Diaphragm Washer Facing Plate Nut Seat O-Ring Bolt 96406902 Compression Spring 1 6 Refer to Figs. 7 and 8 1.
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Installation Dimensions in Inches (mm) VALVE A B C D E F G H J K L M N P Q 4" (100mm) 5 (133) 3 64 (171) 13 (337) 7 78 (200) 25 4 (654) 5 (140) 8 (216) 13 (343) 6 (159) 2½ (64) 14 (335) 12 (305) 49 (1251) 23 (584) 6" 6 14 (150mm) (159) & 165mm 73 4 (197) 13 14 (337) 77 8 (200) 263 4 (654) 5 12 (140) 8 12 (216) 14 12 (368) 83 4 (222) 3 14 (83) 16 (406) 12 12 (318) 51 14 (1302) 25 (635) 1 4 1 4 3 1 2 1 2 1 2 1 4 1 4 R S 33 4 (857) 36 (914) 103 4 (273)
