Starting and Operating Instructions
5-16
750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
sure increases. Observe the steam gauge to check the cutoff pressure as the operating limit control shuts the burner
down. Slowly open the header valve to release steam pressure and check the cut-in setting as the burner restarts.
Check the modulating control for the desired operating pressure range. See Chapter 6 for instructions on the
adjustment of controls.
The water temperature on a hot water boiler that may be operating at less than full load may be raised by manually
increasing the firing rate until the burner shuts down through the action of the operating limit control. Observe the
thermometer to verify the desired settings at the point of cut-out and again when the burner restarts. Return the
manual automatic switch to “automatic” and check the modulating control for the desired temperature range. See
Chapter 6 for instructions on the adjustment of the controls.
Check the proper operation and setting of the low-water cutoff (and pump operating control, if used).
Proper operation of the flame failure device should be checked at startup and at least once a week thereafter. Refer
to Chapter 8 for information on flame safety checks. Check the program relay’s annunciation for any system failure.
Observe the promptness of ignition of the pilot flame and the main flame.
Check for tight shutoff of all fuel valves. Despite precautions and strainers, foreign material may lodge under a
valve seat and prevent tight closure. Promptly correct any conditions that cause leakage.
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