Fulton Vertical Electric (FT-N) Thermal Fluid (hot oil) Heater - Manual (Page 41)

Fulton Thermal Corp.*Electric Thermal Fluid Heaters Manual* Version 2010-0423
Page 41
Note
Fulton Thermal Corporation cannot be held responsible in the case of accident or
damage resulting from the use of inadequate fluid.
i) Routine Analysis of Heat Transfer Fluid
1. Nearly all leading manufacturers of heat transfer fluids provide an after
sales service to monitor the condition of the fluid in operation and make
recommendations when replacement becomes necessary.
2. Each fluid manufacturer has procedures for regular testing and analysis
of the fluid. These usually allow for a sample to be taken and analyzed at
least once a year, although actual frequency will depend on operating
temperature, number of hours operated weekly, and the results of tests
made during the first weeks of system operation.
3. Fulton Thermal Corporation recommends that the thermal fluid in your
system be analyzed within the first two months after start-up.
4. During the first few months of operation, sampling may be carried out at
frequent intervals to confirm that system performance has been
predicted correctly.
5. If the supplier of your thermal fluid does not contact you within four
weeks of commissioning, contact the supplier and make certain that the
“fill” is registered for routine analysis.
j) Thermal Fluid Breakdown
1. The possibilities of thermal fluid breakdown are very slim in a typical
closed loop thermal fluid system. Fulton’s D/A tank creates a “cold seal”
of fluid that is slightly above ambient temperature. This prevents
oxidation that will happen when high temperature fluid contacts air.
2. This will also occur when hot thermal fluid contacts air at a leak in the
system piping. Oxidized thermal fluid becomes acidic and will damage
the thermal fluid system. Thermal fluid breakdown can occur in sections
of piping where there is a low flow
condition. A low flow rate through the heater will result in high film
temperatures leading to breakdown of the thermal fluid.
3. Multiple pressure switches and a differential pressure switch are used to
prevent this condition from occurring. These safeties must not be
bypassed at any time.