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Vapor Power International LLC
551 S. County Line Road, Franklin Park, Il 60131
Phone: 630-694-5500 Fax: 630-694-2230
5.0
MAINTENANCE
5.1
BOILER
5.1.1
Pressure Vessel
Assure annual inspection by qualified ASME Boiler and Pressure Vessel
Inspector. This inspection will cover the vessel and relief valve only.
5.1.2
Heating Elements
Make periodic checks for loose terminal and wiring connections. If all
elements have been operating normally and all circuits draw rated current,
no element tests are required. If element failure is suspected, the elements
should be checked individually with an ohmmeter. Grounded elements
may require a “Megger” for detection.
5.2
CONTROL CIRCUITS
5.2.1
Temperature Limit Thermostats
Check cutout action of the limit thermostats by individually rotating the
dials to below the boiler water temperature. The step control should reset to
no load after each trip.
5.2.2
Low Water Cutoff
The LWCO level probe should be periodically checked. If there is any
seepage between the conductor and its insulator or between the insulator
and the compression fitting, replace the probe.
If the boiler is supplied with a float-type water cutoff, check the cutoff
action by periodically blowing down the water column as quickly as
possible. The step control should always reset to no load.
5.2.3
Temperature Control
A check of the proportioning temperature control system can be made by
moving the set point of the controller up or down scale and noting the
corresponding action of the step control. If the step control fails to follow
in either direction, refer to the appropriate descriptive literature at the rear
of this manual.
