INSTALLATION INSTRUCTIONS - ELECTRCIAL Wiring Valve: Wiring must comply with all applicable codes and standards. Supply voltage must agree within ±10% of nameplate voltage. Lower voltage may prevent plunger seating necessary for positive latching. For detailed electrical data and valve internal wiring diagram, refer to catalog and/or diagram in valve cover. Valves must be electrically interlocked with all safety-limit devices in accordance with applicable codes, standards, and the authority having jurisdiction over safety requirements for the overall installation. See OPERATING Instructions. Maintain NEMA-4 integrity of upper enclosure; use dust- and water-tight electrical connectors. Use cable sealing grips with strain relief for cord or cable. Consider internal sealing devices. 1519 Motorized Automatic Shutoff Valves incorporate an auto- matic reset temperature-sensitive device that breaks current to motor when winding temperature exceeds about 230°F. As with any electrical component, auxiliary switches, solenoids, and drive motors may eventually fail. These components can be replaced in the field. See MAINTENANCE section of these instructions.
Pre-Start Testing: Prior to initial start-up and with upstream fuel valve closed, operate valve electrically for 10-15 cycles. This not only provides electrical check, but also can wipe disc and seat free of accumulated foreign matter.
Valve was production-tested when manufactured; if it is inoperative, make sure it is powered properly.
Shutoff valves are endurance-tested far in excess of the most stringent requirements of any approval agency. They are de- signed for long life and to be as maintenance- and trouble-free as possible. Every valve is operationally tested and meets the require- ments of FCI 70-2, Class VI Seat Leakage when in good operable condition. TOP ASSEMBLY components, including motor of 1519 Valves, require no field lubrication and should never be oiled. Field repair of body and latching mechanism, or field replacement of body and latch mechanism components, is not recommended. Unauthorized field alteration of valve body, top assembly, switches, or motor drive unit voids all warranties. VALVE LEAK TEST , performed with valve in line as prescribed by jurisdictional authorities, is strongly encouraged and should be done on a regularly scheduled basis. In rare instances where valve appears to be leaking, perform pre-start testing (see other side for instructions). If leakage has not stopped remove valve from service. Insurance authorities agree... ....the safety of any industrial fuel burning installation is dependent upon well-trained personnel who are able to follow instructions, and to react properly in cases of emergency. Their knowledge of, and training on, the specific installation are both vital to safe operation. Safety controls may get out-of-order without operator becoming aware of it unless shutdowns result. Production-minded operators have been known to by- pass faulty controls without reporting the trouble. To counteract dangerous consequences of such by-passing, plant management must carefully develop an exact schedule for regular periodic inspection of all safety controls, insisting it then be rigidly adhered to.
OPERATING INSTRUCTIONS
When electrically de-energized, 1518/1519 Valves close almost instantly. Primary power supply is a flame safeguard circuit, which is preceded by all other safety interlocks required by the system design. During start-up, a fault in any safety limit must prevent valves from opening. Conversely, a limit or flame failure during operation must cause valves to close. 1519 Motorized Valves begin opening cycle immediately upon being powered; motor runs only until full-open position is reached. Well-defined holding action maintains full-open position. 1518 Manual Reset Valves require two positive actions to open: a half-rotation of handle to latch internal mechanism, and a reversed half-rotation of handle to open valve. Valve can be opened fast or slowly, but experienced operators often try to synchronize opening rate with pressure regulator response. Instructions for opening are on operating side of top cover. Never open valve until all essential allied equipment is operative and combustion enclosure has been purged per NFPA 86 Standards. Failure of valve to open indicates it is not powered. Check power supply first, then check solenoid and motor. Refer to MAINTENANCE section. If any valve does not close when de- energized, remove valve from service.
1518 Manual Valves can be closed manually, but electrical closure is preferred.
Instructions 1518/1519 Page 4
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