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W:\ELECTRICAL\MANUAL\BENCH\GENERAL INSTRUCTIONS\BENCHOVEN INS.8-18
7 MAINTENANCE
7-1 For safe oven operation, a preventative maintenance program must be developed
and followed for each individual oven application. The user should review
recommendations from their insurance underwriters. We suggest the review of
Factory Mutual (FM) Specification 6-9 on Industrial Ovens and Dryers and the
National Fire Protection Association (NFPA) Specification 86 on Ovens and
Furnaces. W e also recommend a Maintenance Report be developed which lists
tests and inspections performed. A copy of this report should be kept on file for
future review.
A Minimum Periodic Maintenance Report is provided in Appendix B as an example
for developing your own periodic maintenance schedule and report.
7-2 Regularly scheduled inspection and maintenance of all safety devices shall be
performed by the user to ensure proper function. At a minimum, the unit should be
fully inspected annually.
7-3 Disconnect electric power and any other energy source before servicing equipment.
Ovens operate under high voltage and electrical shock is possible. Proper OSHA
required lockout procedures should be followed.
7-4 Do not operate mechanical or electrical equipment with guards removed. Operating
with guards removed could result in bodily injury.
7-5 RECOMMENDED MAINTENANCE ITEMS:
It shall be the sole responsibility of the user to establish, schedule and enforce the
frequency of and the extent of the inspection/maintenance program (as well as the
corrective action to be taken) because only the user can know what the actual operating
conditions are. The tests should be made by personnel who are familiar with the
equipment. It is usually better that maintenance personnel from mechanical and electrical
departments check the equipment rather than regular oven operators. These additional
hands and eyes may catch things that may be otherwise overlooked.
The following are minimum maintenance items we recommend be covered. Your list will
vary depending upon the specific oven and operating conditions.
7-7.1 Application
7-5.1.1 The user is responsible to insure that the oven process has not changed from
the conditions for which it was originally purchased and that the oven is not
modified. It is the user=s responsibility to ensure that flammable solvents are
not placed in the oven and the operating temperature does not exceed the
maximum design temperature.
7-5.2 Electrical
7-5.2.1 Periodically tighten all terminals, especially on power connections, to minimize
terminal and component failure due to poor contact.
7-5.2.2 Periodically inspect contacts in relays for signs of wear or sticking.
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