Inspection and Maintenance
8-2
750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
8.1.1 — Periodic Inspection
Insurance regulations and local laws require periodic inspection of the pressure vessel by an authorized inspector.
Section H of Chapter 3 contains information relative to the inspection.
Inspections are usually, though not necessarily, scheduled for periods of normal boiler down time, such as an off
season. This major inspection can often be used to accomplish maintenance, replacement or repairs that cannot
easily be done at other times. Inspection also serves as a good basis for establishing a schedule for annual, monthly,
or other periodic maintenance programs.
While the inspection pertains primarily to the waterside and fireside surfaces of the pressure vessel, it provides the
operator an excellent opportunity for detailed inspection and check of all components of the boiler including pip-
ing, valves, pumps, gaskets, refractory, etc. Comprehensive cleaning, spot painting or repainting, and the replace-
ment of expendable items should be planned for and taken care of during this time. Any major repairs or
replacements that may be required should also, if possible, be coordinated with the period of boiler shutdown.
TABLE 8-1. Recommended Boiler Inspection Schedule
Daily Monthly Semi-Annually Annually
Check water level Inspect burner Clean low water cutoff Clean fireside surfaces
Check combustion visually Inspect for flue gas leak Clean oil pump strainer,
filter
Clean breeching
Blow down boiler Inspect for hot spots Clean air cleaner and air/
oil separator
Inspect waterside surfaces
Blow down water column Check cams Inspect refractory Check operation of safety
valves
Record feedwater pres-
sure/temperature
Check for tight closing of
fuel valves
Remove and clean oil pre-
heater
Record flue gas tempera-
ture
Check fuel and air linkage Check air pump coupling
alignment
Record oil pressure and
temperatures
Check indicating lights and
alarms
Inspect/repair burner
housing to refractory seal
Record gas pressure Check operating and limit
controls
Treat water according to
the established program
Check safety and interlock
controls
Record atomizing air pres-
sure
Check for leaks, noise,
vibration, unusual condi-
tions, etc.
Check low water cutoff
operation
NOTE: Replacement spare parts, if not on hand, should be ordered sufficiently prior to shutdown.
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