Coil Tube Boiler Operator's Manual: Models CB-200-CTB, CB-350-CTB, and CB-500-CTB
10-8
Guidelines for Preventing Oxygen Contamination
ATTENTION:
Oxygen contamination of boiler water will cause corrosion of iron and steel boiler
components, and can lead to boiler failure (and void warranty). Causes of oxygen contamination
include:
•
Addition of excessive make-up water as a result of system leaks
•
Absorption through open tanks and fittings
•
Oxygen permeable material in the distribution system
To ensure optimal CTB maintenance and operation, follow these recommendations to eliminate
damaging oxygen contamination:
•
Repair system leaks to eliminate the need for the addition of make-up water
•
Eliminate open tanks from the system
•
Eliminate and/or repair leaky fittings
•
Use non-permeable materials in the distribution system
•
Isolate the boiler from the water heater system (i.e. wash and potable waters) by installing a
heat exchanger.
Guidelines for Initial Cleaning of the Hydronics System and Maintaining Water Quality
•
Clean the boiler with an alkaline cleaner (e.g. soda ash or detergent) as recommended by a
qualified water treatment company.
NOTE:
This is necessary to remove oil or other coatings from the tube surfaces. These
protective coatings are commonly applied to new tubes to prevent rusting during storage/
transit and will cause corrosion if left on the tubes during operation of the boiler.
•
After cleaning the boiler, drain the system in a manner and to a location that hot water can be
discharged safely.
•
Remove plugs from all available locations, and wash the water side of the boiler as
thoroughly as possible using a high-pressure water stream.
•
Refill the system with fresh water.
•
Test the pH of the water in the system. The pH should be higher than 8.5 but lower than 9.5.
Add appropriate boiler water treatment compounds as recommended by your qualified water
treatment company (if necessary) to bring the pH within the specified range.
•
Heat the water in the boiler to 180
o
F
to de-aerate the water.
Guidelines for CTB Operation
After proper and safe CTB burner setup and installation has been accomplished, CTB operation
proceeds as follows:
(a) Refer to Section 6 for instructions on starting the CTB.
(b) Following burner startup, set the operating control dial at 180-200
o
F
.
ATTENTION:
If, during normal operation, it is necessary to add water to your system more than
once a year, consult a qualified service technician to check your system for leaks. A leaky system will
increase the volume of make-up water supplied to the boiler which can significantly shorten the life of
the boiler and cause damage to the boiler.
Summary of Contents for CB-200-CTB
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