Temperature Limitations: Refer to catalog or nameplate for specific limitations of valve. If necessary, shield valve to protect from heat (including severe solar or radiant exposure). Do not expect normal valve operation at ambients below freezing if there is excessive moisture in the gas, or if water has been permitted to enter top assembly through a conduit connection, loose housing screws, or gaskets. Pressure Limitations : Observe nameplate pressure ratings. If inlet pressure to associated gas pressure regulator is greater than valve’s catalog rating, additional protection should be provided: see latest version of NFPA 86 for overpressure protection methods. Piping Valve: Body must be oriented in line so flow agrees with arrow on body. Field rotate top assembly only if necessary; see instructions below. Use of Teflon tape (if approved locally) increases possibility of thread over-engagement. Use caution, since even steel valve bodies can be cracked under these conditions. Good piping practice dictates that piping be independently supported so valve bodies are not stressed. Clear fuel line of foreign matter such as line scale, welding beads, metal cuttings, etc. Testing Piping: Follow applicable codes; but, to avoid damage to valve internals, DO NOT USE WATER as a test medium. These valves should NEVER be hydrostatically tested with water as it could cause damage to the valve. If water is introduced into the actuator housing the warranty will be voided. TOP ASSEMBLY ROTATION All Automatic Shutoff Valves are shipped as standard in a configuration compatible with conventional piping, but if OPEN/ SHUT indicator is not visible when valve is installed, top assembly can be rotated (in 90° increments) by following procedure below for either 1518 Manual Reset or 1519 Motorized Valves.
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5. Unscrew the actuator bolts (two or four depending on valve size) to ¼ ", with 5⁄16 " 12-point box wrench ( 3⁄8 " for valves 2" and larger). Do not completely remove. These bolts secure the valve body to the valve's top assmbly housing. 6.Gently lift top assembly NOT MORE THAN ¼", just enough to break the seal between valve body and the Buna "N" rubber gasket . 3 5 4
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WARNING : Lifting too far may dislodge some small parts inside the top housing, requiring complex reassembly and retesting by trained factory personnel.
8. Carefully rotate top assembly about 30° beyond, and then back to the desired position, in a plane parallel to the top of body casting . This should align OPEN/SHUT indicator with its window and the latch arm roller of operating mechanism with its pedestal. 9. Align screw clearance holes in valve body casting with the corresponding tapped holes in the bottom of top assem- bly . 3 5 5 10. Reinsert body screws , carefully engaging threads, and tighten securely. 11. Reconnect conduit and electrical leads. 2 7. Remove the two actuator bolts , (that were partially re- moved in step 5). 2 3
NOTE: OPEN/SHUT indicator never face downward. Motor endplate valves only) should always be vertical. 7 6
of these valves should
(motorized
ALL 1518/1519 VALVES EXCEPT -X VERSION 1. Shut off all electrical power to valve and close upstream gas or oil cock. 2. Remove terminal block cover and disconnect incoming lead wires (tag carefully for reassembly). 3. Remove conduit and leads. 4. Remove sideplate and carefully note position of signal switch wands. 1 8
Instructions 1518/1519 Page 2
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