STARTING AND OPERATING INSTRUCTIONS Chapter 5
750-177 5-15
4. Place the manual flame potentiometer in the CLOSE
(low-fire) position.
5. Check the presetting of the air shutters. (If the linkage is
loose and no pre-settings are available, start with the
shutter in the full open position).
6. When a gas pilot is used, open the valve in the gas pilot
line.
STARTUP. Proceed with initial startup using oil as follows:
1. Position the fuel selector switch (located inside the
control panel) to OIL.
2. Proceed with startup and combustion adjustments using
the same procedures defined for oil-fired burner initial
startup.
3. After the system has been completely adjusted for oil-
firing, place the burner switch to the off position, and
position the fuel selector switch to GAS.
4. Place the Manual/Auto mode switch to the MANUAL
position.
5. Place the manual flame control potentiometer to the
CLOSE (low-fire) position.
6. Close the downstream manual shutoff valve on the
burner gas train (closest to the burner).
7. Admit natural gas to the gas train.
8. Verify that the butterfly valve is in a position that is
nearly closed.
9. Turn the burner switch on. This will start the blower
motor and initiate the prepurge sequence.
NOTE: Select the appropriate burner nozzle size curve based on the burner
size and capacity stamped on the burner nameplate (see Figure 5-8).
Input (MMBtu/hr.)
Figure 5-12: Burner Input vs. Oil Pressure and Nozzle Size (Size #1 Burners)
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