Waterside Care and Requirements
3-10
750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
6.
Fill the pressure vessel with clean water at ambient temperature until the top of the tubes are covered. Add the
cleaning solution, slowly and in small amounts, and then fill to the top with water.
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.
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 boilout.
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 gases, 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.
3.6 — Washing Out
3.6.1 — Hot Water Boiler
In theory, a hot water system and boiler that has been initially cleaned, filled with raw water (and water treated),
with no make-up water added, will require no further cleaning or treatment. However, since the system (new or
old) can allow entrance of air and unnoticed or undetected leakage of water, introductions of raw water make-up or
air may lead to pitting, corrosion and formation of sludge, sediment, scale, etc., on the pressure vessel.
If the operator is absolutely certain that the system is tight, then an annual waterside inspection may be sufficient.
However, if there is any doubt, the pressure vessel waterside should be inspected no later than three months after
initially placing the boiler into operation, and periodically thereafter as indicated by conditions observed during
inspections.
3.6.2 — Steam Boiler
No later than three months after initially placing the boiler into operation, and thereafter as conditions warrant, the
pressure vessel should be drained after being properly cooled to near ambient temperature. Handhole covers
should be removed and waterside surfaces should be inspected for corrosion, pitting, or formation of deposits.
Upon completion of the inspection, the pressure vessel interior should be flushed out, as required, with a high
pressure hose. If deposits are not fully removed by flushing, a consultation may be required with your local Cleaver-
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.
NOTE:
It is advised a water meter be installed in the piping to detect leakage in a “closed” system.
!
Warning
Содержание 4WI
Страница 46: ...Burner Operation and Control 2 22 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Страница 62: ...Waterside Care and Requirements 3 16 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Страница 70: ...Sequence of Operation 4 8 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Страница 114: ...Adjustment Procedures 6 28 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Страница 192: ...Parts 9 38 750 211 revised 2009 Promethean Boilers Model 4WI Manual 9 2 27 General Control Panel 60 106 100 800 HP...
Страница 196: ...Parts 9 42 750 211 revised 2009 Promethean Boilers Model 4WI Manual 9 2 29 Main Gas Train 60 106 100 800 HP...
