Burnham V9A manual Frequent Water Addition, Oxygen Corrosion

k.Drain the system in a manner and to a location that hot water can be discharged with safety.

l.Remove plugs from all available returns and wash the water side of the boiler as thoroughly as possible, using a high-pressure water stream.

m.Refill the system with fresh water.

3.Add appropriate boiler water treatment compounds as recommended by your local qualified water treatment company.

4.Make pH or Alkalinity Test.

After boiler and system have been cleaned and refilled as previously described, test the pH of the water in the system. This can easily be done by drawing a small sample of boiler water and testing with hydrion paper which is used in the same manner as litmus paper, except it gives specific readings. A color chart on the side of the small hydrion dispenser gives the reading in pH. Hydrion paper is inexpensive and obtainable from any chemical supply house or thru your local druggist. The pH should be higher than 7 but lower than 11. Add some appropriate water treatment chemicals, if necessary to bring the pH within the specified range.

With this lower level of protection, care must be exercised to eliminate all of the free oxygen in the system.

5.Boiler is now ready to be put into service.

IMPORTANT

IF, DURING NORMAL OPERATION, IT IS NECESSARY TO ADD MORE WATER PER MONTH THAN INDICATED BELOW, CONSULT A QUALIFIED SERVICE TECHNICIAN TO CHECK YOUR SYSTEM FOR LEAKS.

EXCESSIVE WATER ADDITION:

(Gal/Month)

V903A	16½	V908A	44
V904A	22	V909A	49½
V905A	27½	V910A	55
V906A	33	V911A	60½
V907A	38½	V912A	66

H. FREQUENT WATER ADDITION

A leaky system will increase the volume of make-up water supplied to the boiler which can significantly shorten the life of the boiler. Entrained in make-up

water are dissolved minerals and oxygen. When the fresh, cool make-up water is heated in the boiler the minerals fall out as sediment and the oxygen escapes as a gas. Both can result in reduced boiler life. The accumulation of sediment can eventually isolate the water from contacting the cast iron. When this happens the cast iron in that area gets extremely hot and eventually cracks. The presence of free oxygen in the boiler creates a corrosive atmosphere which, if the concentration becomes high enough, can corrode the cast iron through from the inside. Since neither of these failure types are the result of a casting defect, the warranty does not apply. The maintenance of system integrity is the best method to prevent these types of failure.

I.OXYGEN CORROSION:

WARNING

Oxygen contamination of the boiler water will cause corrosion of iron and steel boiler components, and can lead to boiler failure. Burnham’s standard warranty does not cover problems caused by oxygen contamination of boiler water or scale (lime) build-up caused by frequent addition of water.

There are many possible causes of oxygen contamination such as:

a.Addition of excessive make-up water as a result of system leaks.

b.Absorption through open tanks and fittings.

c.Oxygen permeable materials in the distribution system.

In order to insure long product life, oxygen sources must be eliminated. This can be accomplished by taking the following measures:

a.Repairing system leaks to eliminate the need for addition of make-up water.

b.Eliminating open tanks from the system.

c.Eliminating and/or repairing fittings which allow oxygen absorption.

d.Use of non-permeable materials in the distribution system.

e.Consult your local water treatment specialist for specific recommendations.

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