Fulton Hopkins (HPN) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 16)

© The Fulton Companies 2014
INSTALLATION
HPN-IOM-2014-0416
SECTION 2
2-10
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
4
CAUTION
Some soap used for leak testing is
corrosive to certain types of metals.
Clean all piping thoroughly after
completing the leak check.
Some plastics can be dissolved by
thermal fl uid.
If excessive amounts of thermal fl uid
are vented from the system, additional
thermal fl uid may be required in the
system. Contact Fulton for further
assistance.
with atmospheric air.
 No solid matter in suspension.
 Non-toxic in the case of leakage.
 Suffi cient lubricity, i.e. not likely to cause seizure.
6. The thermal fl uid manufacturer must guarantee the characteristics of the
product, and verify that the fl uid bulk temperature limitation exceeds
the expected operating temperature. After a fl uid is selected, refer to the
manufacturer’s recommendations, published in compliance with the
Occupational Safety and Health Administration (OSHA).
7. If the fl uid expansion volume from 50°F to 600°F (10°C to 316°C) exceeds
20% of the initial fl uid volume, consult Fulton.
 Routine Analysis of Heat Transfer Fluid
Nearly all leading manufacturers of heat transfer fl uids provide an after
sales service to monitor the condition of the fl uid in operation and make
recommendations when replacement becomes necessary.
Each fl uid manufacturer has procedures for regular testing and analysis of the
fl uid. 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 fi rst weeks of
system operation.
Fulton recommends that the thermal fl uid in your system be analyzed within the
fi rst two months after startup and annually thereafter.
During the fi rst few months of operation, sampling may be carried out at
frequent intervals to confi rm that system performance has been predicted
correctly.
If the supplier of your thermal fl uid does not contact you within four weeks of
commissioning, contact the supplier and make certain that the “fi ll” is registered
for routine analysis.
 Thermal Fluid Breakdown
The possibilities of thermal fl uid breakdown are very slim in a typical closed loop
thermal fl uid system. Fulton’s combination expansion/deaerator/thermal buff er
tank creates a “cold seal” of fl uid that is slightly above ambient temperature. This
prevents oxidation that will otherwise happen when high temperature fl uid
contacts air.
Oxidation of the fl uid will also occur when hot thermal fl uid contacts air at a leak
in the system piping. Oxidized thermal fl uid becomes acidic and will damage the
thermal fl uid system. Thermal fl uid breakdown can occur in sections of piping
where there is a low fl ow condition. A low fl ow rate through the heater will result
in high fi lm temperatures leading to breakdown of the thermal fl uid.