Chapter 5 — Starting and Operating Instructions
5-10 Part No. 750-184
the burner “ON”. When the fuel valve light glows, slowly open the
main gas cock. Main flame should ignite unless there is air
present in the line. If the flame is not established within about 5
seconds, turn the burner switch “off” and allow the programmer
to recycle normally for a new lighting trial. Several efforts may be
necessary to “bleed” air from the line.
Do not repeat unsuccessful lighting attempts without re-checking the
burner and pilot adjustments. Failure to follow these instructions
could result in serious personal injury or death
Note: The burner and control system is designed to provide a
“prepurge” period of fan operation prior to establishing
ignition spark and pilot flame. Do not attempt to alter the
system or to take any action that might circumvent the
feature.
Once the main flame is established, turn the Burner Switch to the
"OFF" position and observe that the flame is extinguished promptly.
The flame may continue to burn for a second or two after normal
shutdown due to the gas remaining downstream from the fuel valve.
If the flame continues to burn for a longer period or during blower
motor spindown, it could indicate a main gas valve leak.
Immediately turn the Burner Switch off and close the main gas
cock. Investigate and correct the cause of the valve leakage before
relighting the burner. The main gas valve should provide a tight
seal, provided nothing prevents tight closure. Foreign material
may be present in either the new or renovated gas lines unless
adequate care is taken in cleaning and purging.
When the conditions covered in Section G and in Sections A, B and
C are assured, the burner is ready for firing.
H. IFGR SETUP
Note: Initial IFGR linkage settings and adjustments must be
established by a Cleaver-Brooks authorized representative.
Set up of the LE Option requires simultaneous consideration
of air-to-fuel ratios and NOx levels. This can only be
accomplished with proper combustion emissions monitoring
equipment with NOx, O2, CO, and smoke spot measuring
capability.
It is recommended that the final “installed” settings be recorded for
future reference; see Figures 5-5 and 5-6. The settings should be
marked on the linkage as well.
Normally, once the system has been set and adjusted, the settings
should not be changed unless conditions (including boiler settings)
change. In that case, it will be necessary to contact your local
Cleaver-Brooks authorized representative for assistance.
After the IFGR system is initially set up, it will start up with the
boiler as an integrated boiler system. After shut down periods in
which maintenance and /or adjustments have been performed on
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