750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
3-9
3.5 — Boil-Out of a New Unit
The suggested general procedure for cleaning a boiler is:
1. Refer to the table below to determine water capacity. Have sufficient cleaning material on hand to complete the
job.
Water Capacity and Weights
2. All valves in the piping leading to or from the system must be closed to prevent the cleaning solution from get-
ting into the system.
3. When dissolving chemicals:
A. Put warm water into a suitable container.
B. Slowly introduce the dry chemical into the water, stirring it at all times until the chemical is completely dis-
solved.
C. Add the chemical slowly and in small amounts to prevent excessive heat and turbulence.
4. Water relief valves and steam safety valves must be removed before adding the boilout solution so that neither
the boilout solution nor the grease the solution may carry will contaminate the valves. Use care in removing and
reinstalling the valves. (Refer to Chapter 8, Section 8-17 for valve installation instructions.)
5. An overflow pipe should be attached ton one of the top boiler openings and routed to a safe point of discharge.
The safety valve tapping is usually used.
Use of a suitable face mask, goggles, rubber gloves, and protective garments is strongly recommended when handling
or mixing caustic chemicals. Do not permit the dry material or the concentrated solution to come in contact with skin
or clothing. Failure to follow these instructions could result in serious injury or death.
4WI
Steam Hot Water
Lbs. Gal. Lbs. Gal.
100 5867 703.5 6888 825.9
125 7310 876.5 8569 1027.4
150 7625 914.3 8857 1062.0
200 9996 1198.6 11590 1389.7
250 12587 1509.2 14746 1768.1
300 14848 1780.3 17368 2082.5
350 16025 1921.5 19212 2303.6
400 17953 2152.6 21507 2578.8
500 21053 2524.3 26251 3147.6
600 25352 3039.8 31571 3785.5
700 28700 3441.2 35878 4301.9
800 28700 3441.2 35878 4301.9
!
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