Traid Triumph 1000, Operating And Maintenance Manual

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TRIAD Boiler Systems, Inc.
West Chicago, IL
www.triadboiler.com
evidence of wear, corrosion, etc. If the control is defective, replace it. Do not attempt to make field repairs.
Also see the maintenance section for operational check of temperature limiting devices.
7.5 Example of control set point adjustment procedure
Given that the approximate desired plant operating water temperature is known, review the factory fire
test temperature control set points (shown on the Fire Test Report) and make the appropriate
adjustments on each set point. In the initial phase of adjustment, the original factory set spreads between
set points should be maintained. For specific setting available on your set points, refer to the manuals for
your burner or controls as appropriate.
Turning the larger main scale adjusting screw CW will raise the temperature, while CCW rotation will
decrease it. The same convention also pertains to the smaller differential adjusting screw. The manual
reset high limit control has no differential screw.
After the boiler has been started, the burner adjusted, and the safety devices checked out, the boiler
should be put on line to carry a normal water load. Note that control adjustment will be difficult to
complete accurately if the load is either too high or too low. Control settings are determined by observing
the water temperature gauge at the point of switch function as opposed to relying on the pointer
indication on the scale plate.
There is no benefit in adjusting the manual reset high limit and operating control set points too close to
each other. This practice can lead to nuisance tripping and lockout of the high limit.
7.7 Water level controls
Water level controls are provided on every boiler. The most important function they provide is low-water
fuel cutoff. Low-water fuel cutoffs are designed to provide protection against hazardous low-water
conditions in boilers. History indicates that many boiler failures result from low-water conditions. Low-
water fuel cutoffs may be generally divided into two types, float and probe. Only probe type will be used
on the TRIUMPH SS boilers.
7.7.1 Electric probe type low-water fuel cutoffs
The electric probe type low-water fuel cutoff is located in the instrumentation spool. It consist of one
electrode (probe) that under normal conditions is immersed in the boiler water with a small current being
conducted from the electrode to ground to energize a relay. If the water level drops sufficiently to uncover
the probe, the current flow stops and the relay operates to shut off the burner.
7.7.2 Low-water fuel cutoff and water feeder maintenance.
Low-water fuel cutoffs and water feeders should be dismantled annually, by qualified personnel, to the