
not less than four times a year, and possibly more frequently as the local water conditions may indicate. All water introduced into the boiler should be softened and should include an oxygen scavenger like sodium sulfite. This is required to remove dissolved oxygen from the water. Dissolved oxygen will cause severe boiler tube corrosion.
Draining and refilling the boiler & system
If the system is drained and then refilled, chemical treatment is essential to treat the raw water. Use only clean, softened water.
3.4EXTERNAL “FIRE-SIDE” CLEANING
Purpose
Carbon (soot) is an insulator and corrosive. The heating surfaces of a boiler must be kept free from soot accumulation to keep the boiler operating at its highest efficiency and to avoid damage from corrosion.
Soot removal
If the yearly inspection of the boiler tube surfaces reveals a
If the buildup of soot is appreciable, the flue gas venting system must be thoroughly inspected internally as well, and cleaned as necessary.
Date: 8-4-2010
Revision: 0
Form: 2396
WARNING:
If soot or condensation is apparent, a boiler service technician should be consulted. The presence of soot indicates poor combustion and possibly hazardous boiler operation. Failure to do so may result in fire, explosion potential, or asphyxiation. A combustion test and burner adjustments should be undertaken at once.
3.5SUGGESTED MAINTENANCE SCHEDULE
Daily
1.Make visual inspection of gauges, monitors, and indicators and record readings in boiler log.
2.Make visual check of instrument and equipment settings against factory recommended specifications.
3.Check operation of probe type low water cutoff(s) to ensure control is functioning.
Weekly
1.Confirm boiler area is free of combustible materials and that there is nothing obstructing air openings, draft hood relief openings, etc.
2.Check combustion safety controls for flame failure and flame signal strength as specified in manufacturer's instructions located at the back of this manual.
3.Check all limit controls.
4.Check low water cutoff as described above.
Monthly
1.Check high and low gas pressure interlocks. Refer to manufacturer's instructions for correct procedure.
Annually
1.The flue gas passages and the exterior surfaces of the boiler tubes should be
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