Figure 4-10.-Troubleshooting chart for low boiler water.
2. Faulty diverting valve - If this valve fails open
troubleshooting chart in figure 4-10 explains some
or the pneumatic pilot valve malfunctions, most of the
key items you can check to help pinpoint the source of
steam pressure will be diverted back to the
the problem.
condensate system. Remember, this valve has manual
NOTE
override capabilities.
3. Faulty or airbound recirculating pump - If the
The troubleshooting chart shown in figure 4-10
recirculating pump stops operating, no water can be
contains general information only and should
moved from the separator to the boiler coils. Also, if
not take the place of the EOSS or approved
the pump becomes airbound, you should try to vent
manufacturer's technical guide.
the pump casing to restore water flow. Remember, if
either of these two problems cannot be resolved
Maintaining the Proper Steam Pressure. The
quickly, the boiler will run dry. A quick way to
second most common problem that we will discuss is
determine if the boiler tubes are dry is to watch the
maintaining a proper steam pressure. The following
inlet and outlet exhaust gas temperatures. The closer
list contains the components or conditions that are
or more equal they are, the more likely the boiler is
most likely to cause this problem:
approaching or is already in dry operation.
1. Low boiler water - Review figure 4-10 of this
MAINTENANCE. In this section, we will discuss
chapter and the procedures in the EOSS or approved
some of the maintenance you as a GSM will either be
technical manuals.
required to perform or expected to know. We will only