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MAINTENANCE
To avoid personal injury or death due to electric shock, do
not remove any internal compartment covers or attempt
any adjustment. Contact a qualified servicer at once if an
abnormal flame should develop.
The Ultra low NOx models are equipped with premix
burner. The burner box is sealed to achieve safe and
reliable operation. The burner box should not have any
blockage near the air-gas mixer inlet.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation.
Always verify proper operation after servicing.
For further information on the yearly inspection, consult the
User Manual. It is recommended that a qualified servicer
inspect and service the unit at least once each year.
Turn the unit on at the thermostat. Wait a few minutes,
since any dislodged dust will alter the normal flame
appearance. Flames should be predominantly blue and
directed into the tubes. They should not be yellow. They
should extend directly outward from the burner ports
without curling downward, floating or lifting off the ports.
WARNING
CAUTION
CAUTION
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