Inspection and Maintenance
8-36
750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
The condensate from steam oil heaters must be safely discharged to waste. The waste should be checked periodi-
cally for any traces of oil that would indicate leaking tubes within the heater.
The hot water oil heater contains a heat transfer solution. Oil flows through an inner tube while boiler water sur-
rounds the outer tube. The space between the two tubes is filled with the heat transfer solution and is connected to
an expansion chamber on the rear of the heater. A visual indicator on the chamber reveals the presence of any oil if
an oil leak occurs.
A 50/50 solution of permanent antifreeze and water is generally used as the heat transfer solution. If there is no
danger of freezing, plain water may be used as a replenishment if necessary to refill.
Evidence of oil in either the steam heater condensate or in the water heater indicator demands prompt repairs.
8.24 — Combustion
The frequency of burner adjustments depends upon several factors, including type of burner, type of fuel, load
conditions, ambient temperature, climatic variables, and general maintenance practices.
The air-fuel ratio should be checked monthly in order to alert the operator to losses in efficiency, which do not pro-
duce visible flame change. Any time maintenance is performed on the burner linkage, the air-fuel ratio should be
checked. Readjustment of the burner may be required due to variations in fuel composition. A combustion analyzer
should be used to adjust air-fuel ratio for maximum operating efficiency. If your burner requires adjustments, con-
tact your local Cleaver-Brooks authorized representative for assistance.
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