Starting and Operating Instructions
5-4
750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
On initial starting attempts, several efforts might be required to fully bleed the pilot line. While checking pilot
adjustment, observe whether the pilot flame is extinguished promptly when the burner switch is opened. A linger-
ing flame indicates a leaking gas pilot valve, which is a condition requiring correction before proceeding.
5.4 — Atomizing Air
The supply and pressure of the atomizing air on an oil-fired burner should be checked. Before starting, inspect the
oil pump lube oil level. Add oil if necessary to bring the level to the midpoint or slightly higher in the sight glass.
Use SAE 20 detergent oil of a grade mentioned in Chapter 8 and fill in accordance with instructions given there.
FIGURE 5-1. Atomizing Air Compressor
Check the oil level of the air intake strainer. When operating a standard 78” boiler, make certain that the V-velt
which drives the air pump is in place and has proper tension.
To verify air flow and pressure, place the burner run/test switch on the program relay to the “test” position. If the
burner is a combination fuel burner, be sure that the gas/oil selector switch is set to “oil.” Turn the burner switch
on. The burner will cycle to the low fire pre-purge position and stop there.
FIGURE 5-2. Atomizing Air Pressure Gauge
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