29
Burner Manual —
CG10-24
Section: COMBUSTION AIR ADJUSTMENT PROCEDURE
The shutter and band both control
the amount of flow area available for
air inlet to the burner. The greater their combined flow area,
the higher the firing rate. The primary differences between
the two are their ease of adjustment and their total airflow
area. The shutter turns more easily and has a smaller net
flow area. As a result we have found the shutter to be
better suited for low rate adjustments, and the band better
suited for high rate adjustments. We recommend that
at low rates the band be left completely closed until the
shutter has been fully opened, and that for higher rates the
shutter is left completely open as the band is opened.
Air Band
Figure 21 –
Shutter and Band
Band Indicator Mark
Shutter Indicator
Adjustment Scale
(For Shutter and Band)
Tighten locking screws
securely after adjustments
have been made
Shutter
9. Verify stack temperature meets appliance
manufacturer’s recommendations. Generally
a 325°F stack temperature is high enough to
avoid corrosive condensation in the vent system,
however a large cross section flow area chimney or
a very tall chimney may require a high temperature.
See ANSI Z223.1/NFPA 54 for design requirements.
10. Perform any final adjustments and lock the air
setting securely. Run the burner through several
cycles to verify prompt ignition and stable burner
operation. (see
).
11. Record the combustion performance readings,
burner settings and appliance data on the start-
up form in the back of this manual. If the burner
is firing LP gas you must also record set-up
information on the propane conversion label and
attach it to the appliance.
Maintenance and Service
Explosion, Fire, and
Asphyxiation Hazard
Annual Professional Service Required.
Tampering with or making incorrect
adjustments could lead to equipment
malfunction.
Do not tamper with the burner or controls or make
any adjustments unless you are a trained and qualified
service technician.
To ensure continued reliable operation, a qualified
service technician must service this burner annually.
More frequent service intervals
may be required in dusty or
adverse environments.
Operation and adjustment of the burner requires
technical training and skillful use of combustion test
instruments and other test equipment.
Electrical Shock and
Explosion Hazard
Failure to turn off electric and gas
supply could result in electrical shock,
gas leakage, explosion, or fire hazards.
Turn main gas valves and electric power off before
performing any maintenance.
If a maintenance procedure requires electrical power,
use extreme caution.
Fire Hazard
Removing the igniter from the factory-
installed baseplate could cause serious
death or injury.
Do not remove igniter from factory installed baseplate.
Label all wires prior to disconnecting
when servicing controls. Wiring
errors can cause improper and dangerous operation.
Verify proper operation after servicing.
Explosion, Fire,
Asphyxiation Hazard
Use authorized replacement parts only. Do not
attempt to replicate or modify any parts.
