Commissioning
4-26
750-382
CBT
5. All valves in the piping leading to or from the system must be closed to prevent cleaning solution from
getting into the system.
6. Fill the boiler vessel with enough clean water to cover the furnace. Add the cleaning solution, then fill to the
top. The water used in the initial fill should be at ambient temperature.
7. Fire the boiler intermittently so as to hold solution just at the boiling point. Boil for at least five hours. Do not
produce steam pressure.
8. Allow a small amount of fresh water into the boiler. This will create a slight overflow that will carry off
surface impurities.
9. Continue the boil and overflow process until the water clears. Shut the burner down.
10. Let the boiler cool to 120
o
F or less.
11. Drain the boiler, remove hand-hole plates and wash the waterside surfaces thoroughly using a high pressure
hose.
12. Inspect the surfaces. If they are not clean, repeat boil-out procedure.
13. After closing the handholes and reinstalling safety or relief valves, fill the boiler and fire it until the water is
heated to at least 180
o
F to drive off any dissolved gases.
4.4 — Post start-up checkout procedure
1. Set high gas pressure switch to 50% higher than operating gas pressure at low fire. Set low gas pressure
switch to 50% lower than operating gas pressure at low fire.
2. Check the draft on the outlet stack on each boiler, compare to acceptable limits (-.25 to +.25“ W.C.) and
record in start up form. Operating outside of acceptable limits could result in light off and flame failure
problems.
3. Switch to automatic operation and monitor flue gas to ensure consistent excess air.
4. Reassemble all panels and covers that were removed and replace any plugs that were removed to check gas
pressure.
5. Verify gas pressures remain within limits shown in Table 4-3.
6. Provide instructions to owner and operators on operation, safety and maintenance of the equipment.
7. Provide instructions to owner and operators on proper water treatment guidelines and procedures.
TABLE 4- 4. Boiler water capacity
Boiler HP 10 15 20 25 30
Normal volume (gal) 150# 55 55 113 113 180
15# 57 57 115 115 184
Flooded volume (gal) 150# 80 80 168 203 248
15# 82 82 171 206 252
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