FT-C Vertical Electric Thermal Fluid Heater Manual 12 2013 ISSUE 1
a)
1. All thermal uid heaters have at least one High Temperature Limit. The high temperature
limit(s) is/are normally closed switch(es) that break on a temperature rise over the set
point.
2. The switch may be either a solid state controller or a bulb and capillary type switch. The
High Temperature Limit is a safety device that protects the thermal uid and heat transfer
coil from excessively high temperatures.
3. Solid-state high temperature limits will have a manual reset. Bulb and capillary type limits
will not have a manual reset. If this/these switch(es) trips, it is generally one of the
following issues.
b)
1. Too low of a ow rate will result in a higher rate of heat transfer to the thermal uid and
heat transfer coils. This will result in a higher temperature difference between inlet
temperature and outlet temperature.
2. It is important to make sure that the minimum ow rate as specied by Fulton for that
specic model is maintained.
3. Check inlet and outlet pressures of the heater to determine differential pressure and ow
rate. Ensure that this ow rate meets or exceeds minimums specied by Fulton (see
chart). Also check differential pressure switch for proper operation and setting.
Complete the log on the following page, at least once per day as a minimum. It is recommended
that the log sheet be lled out twice per shift of operation.
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