PAGE 7
1. NOTE: Read the applicable sequence of
burner/primary gas control operation in
Section 3 Operation and Troubleshooting
before proceeding.
2. Depress the combination gas valve manual control
knob and turn to “OFF” position.
3. Adjust the primary air and off-cycle damper to the
start up settings shown in Figure 12A and 12B.
4. On new gas line installations, air may be trapped in
the line, the burner may experience several
lockouts until all the air is purged from the lines.
5. Turn on the main electrical power and set the
thermostat or operation control to call for heat.
Allow the burner to run a MINIMUM of 5 minutes to
purge combustion chamber and appliance heat
exchanger.
6. Set the thermostat or operating control below room
temperature, shutting the burner “OFF” 1 minute to
RESET the primary control.
7. Depress the combination gas valve manual control
now and turn to “ON” position.
8. Set the thermostat or operating control to call for
heat. The burner will start and go through the
applicable sequence of burner/primary gas control
operation, refer to step 1.
9. Once burner is running adjust the orifice manifold
pressure regulator as described in paragraph J -
Pressure Regulator Adjustment.
10. A more accurate BTU (kW) input can be determined
by using the NATURAL gas service meter with the
burner only on (all other gas appliances should be
off). The hand on the gas meter dial with the lowest
cubic feet valve (fastest revolving dial), should be
clocked for one complete revolution and use the
following formula.
3600 x cubic ft. (m
3
)pre revolution x btu (kW) valve/cub ic ft (m
3
) = BTU/HR (kW/Hr)
seconds per revolution
EXAMPLE: 3600 x 1 x 1000 (.2931kW)
= 300,000 BTU/HR (87.93 kW/HR)
12
11. After the desired input has been obtained, re-adjust
the primary air damper open or closed to visually
obtain a blue flame with well defined orange or
yellow tips for natural gas, or well defined yellow tips
for propane gas.
12. After the burner has been in operation for at least 10
minutes, assuring combustion chamber and heat
exchanger are fully warmed, take combustion
analysis flue gas samples just ahead of the draft
control in the flue pipe.
NOTE: ALWAYS USE RELIABLE COMBUSTION
TEST INSTRUMENTS. BEING
PROFICIENT IN THE USE OF THESE
INSTRUMENTS AND INTERPRETING
THEIR DATA IS NECESSARY FOR SAFE,
RELIABLE AND EFFICIENT BURNER
OPERATION.
13. Perform the following combustion analysis. All
adjustments below must be made with the following
instruments: draft gauge, O
2
or CO
2
analyze and
CO tester.
A. Adjust the primary air damper to provide about
25% excess combustion air. Confirm this by
checking the flue gas for its FREE OXYGEN
(O
2
) or CARBON DIOXIDE (CO
2
) PERCEN-
TAGES with a test instrument. Free oxygen
should be about 4.5%, or carbon dioxide should
be about 9.5% for natural gas, 12.1% for
propane gas.
B. CARBON MONOXIDE - Should be checked for
its presence in the flue gas. This percentage
should not exceed .04% (or 400 PPM).
C. NOTE: Check overfire draft and adjust to
NEGATIVE -.01 (2.491Pa) to -.02 (4.982Pa)
inches w/c during burner operation.
SECTION II
INITIAL START UP
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