750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
3-9
3.6 — Boil-Out of a New Unit
6. Fill the pressure vessel with clean water until the top of the tubes is covered. Add the cleaning solution and then
fill to the top. The temperature of the water used in the initial fill should be at ambient temperature.
7. The boiler should then be fired intermittently at a low rate sufficient to hold solution just at the boiling point.
Boil the water for at least five hours. Do not produce steam pressure.
FIGURE 3-4. Water Capacity and Weights
8. Allow a small amount of fresh water to enter the boiler to 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 120º F or less.
11. Remove handhole plates and wash the waterside surfaces thoroughly using a high pressure water stream.
12. Inspect the surfaces. If they are not clean, repeat the boil-out.
13. After closing the handholes and reinstalling the safety or relief valves, fill the boiler and fire it until the water is
heated to at least 180º F to drive off any dissolved gasses, which might otherwise corrode the metal.
The above procedure may be omitted in the case of a unit previously used or known to be internally clean. How-
ever, consideration must be given to the possibility of contaminating materials entering the boiler from the system.
On a steam system, the condensate should be wasted until tests show the elimination of undesirable impurities.
During the period that condensate is wasted, be sure make-up water is treated to prevent an accumulation of
unwanted materials or corrosion.
On a hot water system, chemical cleaning is generally necessary and the entire system should be drained after treat-
ment. Consult your local Cleaver-Brooks authorized representative for recommendations, cleaning compounds,
and application procedures.
Generator Sizes
Water - Gallons Water - Weight
Normal Flooded Normal Flooded
250 HP 1280 1665 10670 13880
300 HP 1560 2020 13000 16840
350 HP 1855 2410 15465 20090
Be sure to drain the hot water to a safe point of discharge to avoid scalding. Failure to follow these instructions could
result in serious injury or death.
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