31
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Excessive gas line pressure drop and/or burner manifold
pressure too low may cause burner start /operate with
excessive noise!
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ADJUSTMENT PROCEDURE FOR FIRE-RATE, LOW
NOX AND HIGH ELEVATION (Fine-Tune)
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Never set burner combustion too lean (causing noisy operation)
or too rich (causing combustion chamber premature failure)
see Table 3 for proper settings.
Never set the air damper outside of its adjustment range
of the rated fire rate unless authorized by an A. O. Smith
Service Center.
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UNDER NO CIRCUMSTANCES SHOULD THE INPUT RATE
EXCEED THE INPUT RATE SHOWN IN THE HEATER RATING
PLATE. OVERFIRING COULD RESULT IN DAMAGE OR
SOOTING OF THE HEATER.
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Содержание 650A
Страница 23: ...23 FIGURE 19 FIGURE 19B ...
