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Aquarius DIW Heaters Owner’s Manual
Ver. 1.0.0 | 29 Apr 2020 | P. 2
Subject to change without notice
2. Introduction
While the official language of the “Original Instructions” is in English, any interpretation
of this Instruction Manual in other Community languages will be discussed by the
manufacturer (Heateflex) and the customer on an as required basis.
Your new Aquarius
®
DIW heating system is engineered to offer a safe, reliable, and
effective solution to de-ionized heating needs by providing at temperature ultrapure
DIW. These systems are designed to reduce water usage as well as maintain high purity
requirements. This has been achieved using our patented Heateflex heaters and Power-
to-Flow
®
Control system.
Heateflex’s patented Power-to-Flow
®
Control system eliminates undesirable overshoots
or drops in temperature, which are commonly the result of inadequate PID temperature
controllers. Aquarius
®
systems are designed to maintain accurate user-specified
temperature even with process flow rate variations and during recirculation (Systems
equipped the recirculation option only). The Power-to-Flow
®
Control system compensates
for changes in the process flow rate by measuring the flow rate of the fluid as it enters
the heaters, measuring the temperature at various stages in the heating process,
and adjusting the proportion of power applied to each heating zone based on those
measurements. This integrated control method is advancement to previous methods of
temperature control that reacts quickly and robustly to any variations in flow, providing a
steady supply of ultra-pure DIW at a stable temperature.
High purity is maintained throughout the heating process due to the use of PVDF, FEP,
and PFA wetted surfaces. Aquarius
®
systems are equipped with many safeties and to
protect the heater modules from unnecessary damage due to overheating, including:
All Aquarius
®
systems come standard with a pressure by-pass protect against over
pressurization of the unit. Shorted SCR sensing has been incorporated in the Aquarius
®
for added heater protection. A Safety Relay, Safety PLC and GFCI are standard on the
Aquarius
®
which provides added protection to the unit and for operators. To monitor the
purity level of the exiting heated DIW, a resistivity sensor is available as an option on
Aquarius
®
systems. The Power-to-Flow
®
Control system also incorporates the use of a
visual touch screen user interface which is straightforward and easy to operate with only a
few adjustments needed after initial settings are entered.
• Thermocouples
• Liquid level sensor
• Flow sensor
• Pressure transducer
• High-limit sensors
• Thermal cut-off sensors
