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Chapter 3 Controller Descriptions and Operation
Class I/NFL
Caution, Risk of fire!
The Class I/NFL series of the equipment is designed for operation with non-flammable heat
transfer liquids only! Water and mixture of water and glycol are the most popular non-
flammable heat transfer liquids appropriate for the equipment.
No silicone oil is allowed for use with this series of the equipment. The internal silicone rubber
parts may swell when in contact with silicone oil resulting in leakage of the liquid!
Class III/FL
Caution, Risk of fire!
The Class III/FL series of equipment are designed for operation with non-flammable and
flammable heat transfer liquids! Alcohol and silicone oils are the most common flammable
heat transfer liquids. Use special care when using with these flammable liquids, including the
proper setting of the adjustable overheating protection device.
The circulation of the heat transfer liquid is important for performance and safety! The
kinematic viscosity, immersion and distribution of the specimen and, flow resistance of the
application system and the circulating tubing significantly influence the circulation of the
liquid!
The first time commissioned for use or when exchange of the heat transfer liquid and,
immediately after startup of the circulating pump, check if any liquid leakage exists in the
external circulating tubing and fitting, if head pressure of the pump and flow of the heat
transfer liquid are in their rated range and, if the liquid level is in its range for safe operation!
Mixing and use of heat transfer liquids with different physical and/or chemical properties may
adversely affect the performance and safety of the equipment! The liquid shall be completely
drained and removed before attempting to charge the other. When necessary, consult Xtemp
or supplier of the liquid for particular application!
Never touch or attempt to handle the heat transfer liquid with temperature higher than +60°C!
Caution, burn hazard!
No draining of the heat transfer liquid with potential of chemical or biological hazard! Collect
and identify the heat transfer liquid for future use! Consult Xtemp or manufacturer of the liquid
for proper disposal!
Install an extraction system over the bath opening, if the operating of the equipment could
lead to liberation of hazardous air or gas mixture, for example the evaporation of the heat
transfer liquid! The rating of the fume hood shall be at least the maximum possible exhausting
temperature! If necessary for safety, additional temperature limiting and warning devices,
condensate accumulator shall be installed for the extraction system!
XTEMP ENVIRONMENTS (SHANGHAI) CO., LTD.
http://www.xtemp-usa.com/
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DSGO0708-2-V211119/UXP8011-CD6400/CLASS I/NFL/RT+5~+100°C
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