13
NOTE: Initial activation of the burner should begin with checking the function of the automatic controls by means of a “dry
run” before gas is supplied to the main burner nozzle – through a complete main burner firing cycle and a complete check
of all automatic safety controls with the test firing valve in the closed position then through an activated firing cycle.
3. Temporarily remove the covers from the High and Low gas pressure switches and set the switches using the dials. The
high gas pressure switch should be set at the highest pressure setting, as an initial starting point. The low gas pressure
switch should be set at the lowest pressure setting, as a starting point. NOTE: These settings must be re-adjusted after
the burner is ignited.
4. Open the ball valve to the inlet of the gas pipetrain. Make sure the ball valve nearest the burner (the outlet of the gas
pipetrain) remains closed. Test all new piping for leaks with a soapy solution or leak detector. Do not use an open flame
to test for gas leaks. Push the manual reset buttons on the gas pressure switches.
5. Turn on the main electrical power and set the thermostat or operation control to call for heat. Turn the burner on-off
switch to the “on” position. Allow the combustion fan to run a MINIMUM of 5 minutes to purge the combustion chamber
and appliance heat exchanger. The amber indicator light shows that the burner is powered and the switch is in the “on”
position.
6. Turn the burner on-off switch to the “off” position or set the thermostat or operating control below room temperature,
shutting the burner “OFF” at least 1 minute to RESET the primary control.
7. Open the ball valve on the outlet of the pipetrain (nearest the burner).
8. Power the burner, turn the burner on-off switch to the “on” position andset 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
Section III for sequence of operation.
NOTE: On new gas line installations, air may be trapped in the gas line, the burner may experience several lockouts until
all the air is purged from the lines.
9. Once the burner is running, adjust the gas pressure regulator as described in Section I, paragraph H – Pressure
Regulator Adjustment, based on the pressure described in Figure 8.
10. A more accurate Btu/hr (kW) input can be determined by using the gas service meter with the burner operating (all
other gas appliances must be off). The hand on the gas meter dial with the lowest cubic feet value (fastest revolving dial),
should be clocked (timed) for one complete revolution. Use the following formula:
3600 x cubic ft. per revolution x Btu value/cubic ft = Btu/hr
seconds per revolution
Natural Gas Example:
Timing one revolution of the 1ft
3
dial at 6 seconds on natural gas (roughly 1000 Btu/ ft
3
heating value).
3600 x 1 x 1000 = 600,000 Btu/hr
6
Propane Gas Example:
Timing one revolution of the 1ft
3
dial at 15 seconds on propane gas (roughly 2515 Btu/
ft
3
heating value).
3600 x 1 x 2515 = 603,600 Btu/hr
15
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. If the burner is
firing into a refractory lined chamber, a blue flame may not be possible to obtain.
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. A combustion
gas analyzer should be used to fine-tune the burner.
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.