Part Number 550-141-186/0703
25
• Installation • Start-Up • Maintenance • Parts
7b
Final Adjustments — steam boilers
Skim steam boilers
1. Provide 2" piping from boiler skim tapping to floor drain.
2. Adjust waterline to midpoint of skim piping.
3. Fire boiler to maintain a temperature below steaming rate during skimming process.
4. Feed in water to maintain water level. Cycle burners to prevent rise in steam pressure.
5. Continue skimming until discharge is clear. This may take several hours.
6. Drain boiler. While boiler is warm but
NOT HOT
, flush all interior surfaces under full
pressure until drain water runs clear.
7. Remove skim piping and plug tapping.
8. Close drain cock. Fill with fresh water to waterline. Start burners and steam for 15 minutes
to remove dissolved gases. Stop burners.
9. Check traps and air vents for proper operation.
Cleaning
compounds
Clean all newly installed steam boilers to remove oil and grease. Failure to
properly clean can result in violent fluctuations of water level, water passing
into steam mains, or high maintenance costs on strainers, traps and vents.
Do not use petroleum-based cleaning or sealing compounds in boiler
system. Severe boiler damage will occur.
Filling steam boilers
1. Do not fill (except for leakage tests) until boiler is ready to be fired.
2. Fill to normal waterline, halfway up gauge glass.
3. Boiler water pH 7.0 to 8.5 is recommended.
4. Follow skimming procedure.
Water treatment
Continual fresh makeup water will reduce boiler life. Minerals can build up in sections, reducing
heat transfer, overheating cast iron, and causing section failure.
In hard water areas or low pH conditions (below 7.0), consult local water treatment company.
Do not use petroleum-based cleaning or sealing compounds in boiler
system. Severe boiler damage will occur.
