Tune-up Methods and Record Keeping
Tune-up methods. For certain equipment, compliance with Rule 4305: Boilers,
Steam Generators and Process Heaters, may be achieved by performing an
annual tune-up. Two approved methods for tuning boilers are found in Rule 4304: Equipment
Tuning Procedures for Boilers, Steam Generators and Process Heaters. The
method to be used is dependent on the nature of the boiler. Method 4304-A is for
mechanical draft units and Method 4304-B is for natural and induced draft units.
Rule 4304 also allows for the use of an alternative tune-up method. If you
choose to use an alternative method, a step-by-step description of the procedure
must be kept with the unit. This alternative procedure must also include a
statement that the tune-up method is intended to achieve the lowest possible
nitrogen oxides (NOx) emissions while maintaining carbon monoxide (CO) emissions
at less than 400 ppm at 3% oxygen and acceptable flame conditions.
It is highly recommended that prior district approval be obtained before
using any alternate tune-up method to ensure that it meets all District
requirements. In order to obtain approval of an alternative tune-up method,
please contact the Permit Services Division of the District office nearest to
you. A detailed description of the method will be needed for evaluation
purposes. Alternative methods used without prior approval will be subject to
compliance action if they are found to be unacceptable.
Record keeping. The attached form has been created for your use in
documenting that a tune-up has been performed. Forms from your boiler service
company are also acceptable as long as the forms state that the tune-up meets
District requirements, report the method used, and are signed by a service
technician. Records of tune-ups must include all combustion analyses data, a
detailed description of any alternative tune-up procedure, and must be kept with
the equipment for two years.
If you have any questions regarding boiler tuning requirements, please
contact the Compliance Division of the District office nearest to you.
Rule 4304 Tuning
Certification Form
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