62
TRIAD Boiler Systems, Inc.
West Chicago, IL
www.triadboiler.com
At joints;
Where the flue gas may have been below its dew point;
Under refractory or insulation if it has been water soaked for a period of time.
Look for erosion:
1.
Draft fan housings and wheels handling dirty gas
2.
In the vicinity of soot blowers
3.
At sharp turns or points where dirty gas flow may concentrate
4.
Areas near where any steam or water leaks have occurred
External Checklist:
1.
Free access should be provided to the burner front, observation ports, and operating valves.
2.
All instrumentation and controls should be complete, operational, and checked for proper calibration
and action.
3.
External indicators permanently marked or installed on damper shafts and registers are necessary for
positive determination of position while the boiler is in service.
4.
Personnel protection from hot surfaces should be provided by restricting access or by covering the
hot surfaces with insulation.
5.
Find potential air or flue gas leaks in the furnace of out of service boilers operated with positive
furnace pressure by operating the forced draft fan at high flow rates. Leaks that can be felt or heard
should be repaired before returning the boiler to service.
6.
Safety relief valve outlets should be piped so they cannot discharge on people or any property that
may be damaged. The discharge piping should be supported so that loads (piping weights and dynamic
forces during operation) transmitted to the relief valves are minimized. The weight supported by the
valve should not exceed the weight of a short elbow and drip pan or comparable weight of a direct
connected free hanging discharge pipe. Installations requiring long discharge piping runs should not
have those discharge piping runs directly connected to the valve. The valve manufacturer should be
consulted if the weight to be loaded on a valve outlet exceeds a short elbow with a drip pan.
8.4 Limit control tests
All limit controls should be tested periodically. Refer to the maintenance schedule as a starting point and
discuss the details with your installer. A test gage should be used to check the operation of all pressure
controls. In general, the tests are to be performed as follows. Some tests may not apply to your specific
installation.
8.4.1 High & Low gas pressure switch limit test & adjustment
The maximum and minimum pressure range of the gas train is on the rating plates on the front of the
boiler. If any readings are above this range, or if adjustments can’t be consistently made within this range,
then other issues like pressure regulators or line pressure need to be addressed first.
Содержание Triumph 1000
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