Electrical Data | Automatic Oil Shutoff Valves
ELECTRICAL DATA for normally-closed valves General Shutoff valves are electrically actuated from the flame safeguard and/or safety control circuits. Standard valve assemblies include an internal holding solenoid or printed circuit board for 120 volt 60 hertz ac power. (Other electrical current options are available upon request.) 1517 Valves have the internal solenoid. The solenoid (or the printed circuit board) is energized whenever the valve is powered. The motor operator on automatic reset versions is powered only during the opening stroke. Switch wiring diagrams (see page 4) are part of each valve assembly, summarizing electrical data and wiring for a valve equipped with terminal block and a full complement of optional signal switches.
Diagrams show valve in its normally-closed (at rest) position. The indicated internal wiring is present only when the appropriate auxiliary switches are specified. Automatic reset valves always include a VOS-1 SPDT valve-open motor limit switch. Good practice dictates that auxiliary switches in safety shutoff valves should be used for signal duty only , not to operate ad- ditional safety devices. Signal switch designations: VCS (Valve Closed Switch) is actuated at the end of the "closing" stroke. VCS-1 is SPDT; VCS-2 is DPDT.
VOS (Valve Open Switch) is actuated at the end of the "opening" stroke. VOS-1 is SPDT; VOS-2 is DPDT.
Switch amp ratings are shown on the schematic wiring diagrams. DO NOT EXCEED rated amperage or total load shown.
Volt-Ampere (VA) Ratings
1517/1517U Automatic Reset Valves
AC Operation
DC Operation
Size
Opening
Holding
Opening
Holding
- 0 1 ( ½ " ) -0 (¾") -1 (1") -2 (1¼")
–
–
143
5
220
22
212
14
220 VA is for 60 hertz; if 50 hertz power, VA rating is 342. NOTE: Total VA of solenoid and switches (manual reset valves) or solenoid, motor and switches (motorized valves) must not exceed the limits shown. The VA rating in the DC column is based on an AC motor and DC solenoid.
Insurance authorities agree... ...the safety of any industrial fuel burning installation is dependent upon well-trained operators 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 the operator becoming aware of it unless shutdowns result. Production- minded operators have been known to by-pass faulty controls without reporting the trouble.
Continued safe operation of any installation is then assured only if the plant management carefully develops an exact schedule for regular periodic inspection of all safety controls, insisting it then be rigidly adhered to.
A main gas manual shutoff cock should be located upstream from all other fuel train piping components and used to shut off all flow of fuel for servicing and other shutdowns.
All safety devices should be tested at least monthly † and more often if deemed advisable. Periodic testing for tightness of manual or motorized shutoff valve closure is equally essential. † per NFPA 86
Bulletin 1517 Page 4
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