CleaverBrooks WB, Руководство по эксплуатации и техническому обслуживанию владельца

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750-136
Model WB Electric Boiler Manual 3-3
3.2 — Boiler and System Cleaning
b. Sodium Carbonate: one lb. for each thirty gallons in the system.
c. Sodium Hydroxide: one lb. for each fifty gallons in the system.
Fill, vent, and circulate the system with the selected solution, allowing it to reach operating temperatures if pos-
sible. After circulating for three hours, drain the system completely and refill it with fresh water. Usually enough
of the cleaner will adhere to the piping to give an alkaline solution satisfactory for operation. A pH reading
between 8.5 and 9.5 is preferred, and a small amount of cleaner can be added if necessary to raise the pH
value.
There are definite indications of an unclean system. See the checklist below. If any of these conditions occur
when filling the system, the boiler and associated system piping need cleaning.

Obviously discolored, dirty water.

A pH or alkalinity test that gives a pH test reading below 7. (Below 7 indicates water in the system is acidic
and corrosive.)

The appearance of dirty foam or scum lines on the surface.
In some cases, there are sufficient quantities of such materials to break down chemically during the operation of
the system causing gas formation and acidic system water. All such materials should be removed.
Hot water systems, in most cases, naturally operate with a pH of 8.5 or higher. If a system indicates pH values
below 7 on the scale, the following symptoms may occur:
•
Gas formation in the system.
•
Pump seal and gland problems.
•
Air vent sticking and leaking.
•
Piping leaks at the joints.
If system deterioration is permitted and leaks develop and water losses increase, it is possible to cause serious
damage to the boiler. Therefore, it’s important to have a closed system that is clean, neutral, and water tight.
NOTE: Check local codes for restrictions on the use of TSP.
NOTE: Do not use Sodium Hydroxide for copper or galvanized systems.
Cleaning compounds are hazardous and protective clothing and personal protective equipment must be worn when
mixing or handling chemicals and chemical solutions in order to avoid serious personal injury or death.
! Warning