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Appendix B: A773 SULFUR FILTER INSTALLATION & MAINTENANCE
When performing combustion tests on oil fired equipment it is important to
use the optional A773 sulfur filter. Failure to do so can result in incorrect and
readings. This filter also protects the sensors from the affects of sulfur. The
A773 does not have to be removed when working with other types of fuels.
PROCEDURE
1. Begin with the water trap section of the flue probe oriented as shown in the
picture below.
2. Remove the water trap from the flue probe hose. (See picture below)
3. Insert the A773 sulfur filter flue probe tube where the water trap was
removed.
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