CleaverBrooks CBLE, Operation And Maintenance Manual

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Adjustment Procedures
6-22 750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
Manual resetting is necessary after a pressure rise. Press the reset lever after pressure falls. Be sure that the mercury
switch equipped control is level.
FIGURE 6-14.
Gas Train Pressure Switches
6.20 — Fuel Oil Pressure and Temperature: General
Variations in burning characteristics of the fuel oil may occasionally require adjustments to assure highest combus-
tion efficiency. The handling and burning characteristics may vary from one delivery of oil to another. Therefore, it
is recommended that the oil system be inspected from time to time to verify that pressures and viscosity are at the
proper operating levels.
Because of variation in oils, including chemical content, source, blends, and viscosity characteristics, the tempera-
tures and pressures listed in Chapter 5, and mentioned in the adjusting of the controls in the following paragraphs,
will vary and thus may be regarded as tentative and to be changed to provide best firing conditions. Figure 6-15 is
an oil viscosity-temperature chart. It may be used as a guide, although your oil supplier will be able to give you more
exact information based on an analysis of the oil.
Review of the applicable maintenance instructions given in Chapter 8 will aid in maintaining an efficient fuel sys-
tem.
When the boiler is shut down, or switched over to gas firing, the pump must operate for a sufficient period of time
to cool the oil heater. Similarly, if an electric, steam, or hot water oil heater is removed for servicing, the tempera-
ture of the heater should be reduced by circulating oil until it has cooled.
NOTE: To prevent oil heater coking, the fuel oil pump must be in operation during all times that an oil heater is in ser-
vice. During any time that the oil pump is not operating, the oil heating system must be electrically shut down by man-
ually turning the oil heater switch to the “off ” position.