Huber Pilot ONE Unistat T300 Series, Руководство по эксплуатации

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Function description
OPERATION MANUAL Chapter 3
Unistat® T300 Series
Liability for errors and misprints excluded. V1.2.0en/12.05.15//14.06
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3.3 To be noted when planning the test
Also observe page 15 in section
»Proper operation«
.
The focus is on your application. Bear in mind that system performance is influenced by heat trans-
fer, temperature, thermal fluid viscosity, volume flow and the flow speed.
▪
Make sure that the electrical connection is adequately dimensioned.
▪ The installation location of the temperature control unit should be selected so as to ensure ade-
quate fresh air, even with water-cooled chillers.
▪
With pressure-sensitive applications, such as glass reactors, the maximum forward flow pressure
of the temperature control unit must be taken into account.
▪ A cross-section reduction or shut-off in the thermal fluid circulation must be avoided. Take corre-
sponding measures to limit the pressure in the system; see data sheet from page 89 in the Section
»Annex« and the data sheet for your glass apparatus.
▪
With temperature control units without pressure limitation, check whether it is necessary to use
an external bypass.
▪ To prevent the danger of over-pressure in the system, the thermal fluid must always be brought
to room temperature before switching off. This will prevent damage to the temperature-control
device or the application. Any shut-off valves must remain open (pressure equalization).
▪
Temperature and the dynamics of the process are determined by the flow temperature. A tem-
perature difference (delta T) forms between flow temperature and process temperature. This
temperature difference may have to be limited, because delta T might exceed limits of the appli-
cation (glass apparatus) and cause bursting. Adjust the delta T value to your application.
▪ The thermal fluid used by you must be chosen in such a way that it not only allows the minimum
and maximum working temperature but is also suitable as regards the combustion point, boiling
point and viscosity. In addition, the thermal fluid must be compatible with all the materials in your
system.
▪
Avoid bending the temperature control and cooling water hoses (if required). Use suitable angle
pieces and lay the hose connections with a large radius. Take the minimum bending radius from
the data sheet of the temperature control hoses used.
▪ The selected hose connections must be resistant to the thermal fluid, the working temperatures
and the permitted maximum pressure.
▪
Check the hoses at regular intervals for any material fatigue (e.g. cracks, leaks).
▪ Keep the length of temperature control hoses as short as possible.
-
Always adjust the inside diameter of temperature control hoses to the pump connections.
-
The viscosity of the thermal fluid determines the pressure drop and affects the temperatur
control results, particularly at low operating temperatures.
-
Too small connectors and couplers and valves can generate significant flow resistance.
Your application will therefore be slower to reach its design temperature.
▪ Water as well as water and anti-freeze mixes must not be used as thermal fluids!
▪
Basically, you should only use the thermal fluids recommended by the manufacturer and only
within the usable temperature and pressure range.
▪ With temperature control close to the boiling temperature of the thermal fluid, the application
should be roughly at the same height or below the temperature control unit.
▪
Fill the temperature control unit slowly, carefully and evenly. For this, wear the necessary person-
al protective equipment, such as goggles, heat-proof and chemicals-resistant gloves, etc.
▪
After filling and setting all the requisite parameters, the temperature control circuit must be
vented. This is required to ensure trouble-free operation of the temperature control unit and
hence your application.
For water-cooled temperature control units, please take the cooling water temperature necessary
for perfect operation and the required differential pressure from the data sheet from page 89
onward in the Section »Annex« .