Starting and Operating Instructions
5-8
750-368
CBEX Elite 100-1200 HP
5.7 — Startup, Operating, and Shutdown: All Fuels
Depending upon the fuel being burned, the applicable pervious sections in this chapter should be reviewed for
preliminary instructions.
When firing with oil, be certain that the burner gun is in its most forward position and latched in place. When fir-
ing with gas, the burner gun should be properly withdrawn and latched in place. The fuel selector switch should
be, accordingly, set to either oil or gas.
Set the AUTO/MANUAL control to MANUAL.
Turn the burner switch ON. The load demand light should glow. The low-water level light should remain out,
indicating a safe water level in the boiler. The programmer is now sequencing.
On ignition failure, the flame failure light will glow and the blower will purge the boiler of unburned fuel vapors
before stopping. After ignition failure, wait a few moments before resetting the lockout switch.
After main flame ignition, the burner should be set on manual control at its low-fire setting (with manual flame
control at “close”) until the boiler is properly warmed. Close the steam header.
In the case of a steam boiler, close the vent valve when the steam begins to appear.
A hot water boiler must have a continuous flow of system water through the vessel during the warm-up period.
The entire water content of the system and boiler must be warmed prior to increasing fuel input.
If the flame at low-fire provides insufficient heat to reach normal operating pressure or temperature after 30 min-
utes, gradually increase the firing rate by turning the manual flame control in one point increments to no higher
than the third cam screw. Operate at the increased fuel input rate for a period of time until an increase is noted
in pressure or temperature.
Do not relight the pilot or attempt to start the main burner, either oil or gas, if the combustion chamber is hot and/or
if gas or oil vapor combustion gases are present in the furnace or flue passages. Failure to follow these instructions
could result in serious injury or death.
NOTE: On an initial starting attempt, several efforts might be required to accomplish “bleeding” of fuel lines, main or
pilot. If ignition does not then occur, do not repeat unsuccessful attempts without rechecking the burner and pilot
adjustment.
The burner and control system is designed to provide a “pre-purge” period of fan operation prior to establishing igni-
tion spark and pilot flame. Do not attempt to alter the system or take any action that might circumvent the “pre-
purge” feature. Failure to follow these instructions could result in serious injury or death.
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