Chapter 6 — Adjustment Procedures
Part No. 750-184 6-21
S. HIGH-GAS-PRESSURE SWITCH
Adjust the scale setting to slightly above the normal burning
pressure. The control circuit will be broken when pressure exceeds
the normal operating pressure. Unnecessary shutdowns may result
if the setting is too close to normal; however, regulations require
that the setting may not be greater than 150% of rated pressure.
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.
T. FUEL OIL PRESSURE AND TEMPERATURE -
GENERAL
Variations in burning characteristics of the fuel oil may occasionally
require adjustments to assure highest combustion 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 temperatures and
pressures listed here will vary and thus may be regarded as
tentative and to be changed to provide best firing conditions. Figure
6-9 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.
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