Huber Pilot ONE Unistat T3*0, Operation Manual

Page: 39 / 100

Function description
Chapter 3 OPERATION MANUAL
V2.4.0en/22.07.20//17.12
Unistat® T300 Series
39
3.2 Information on the thermal fluids
Non-compliance with the safety data sheet for the thermal fluid to be used
INJURIES

Risk of injury to the eyes, skin, respiratory tract.

The safety data sheet for the thermal fluid to be used must be read prior to using it and its
content must be respected.

Observe the local regulations/work instructions.

Wear your personal protective equipment (e.g. temperature-resistant safety gloves, safety
goggles, safety footwear).

Danger of slipping because floor and work area are contaminated. Clean the work station and
follow the instructions for the disposal of thermal fluid and material on page 17 in section
»Proper disposal of resources and consumables« .
Non-compliance with the compatibility between the thermal fluid and your temperature control unit
MATERIAL DAMAGE

Observe the classification of your temperature control unit according to DIN 12876.

Ensure the following materials are resistant with respect to the thermal fluid: Stainless steel
1.4301 / 1.4401 (V2A), copper, nickel, viton (FKM) or nitrile rubber (NR) / NBR / HNBR / ceram-
ic, carbon, al-oxide / red brass, brass, nickel-plated brass and silver solder.

The maximum viscosity of the thermal fluid must not exceed 50 mm²/s at the lowest working
temperature!

The maximum density of the thermal fluid may not exceed 1 kg/dm³!
Mixing different thermofluids in a thermal fluid circuit
PROPERTY DAMAGE

Do not mix different types of thermofluid (such as mineral oil, silicone oil, synthetic oil, water,
etc.) in a thermofluid circuit.

The thermal fluid circuit must be rinsed when changing from one type of thermal fluid to an-
other. No residues of the previous type of thermal fluid may remain in the thermal fluid circuit.
Inert gas blanket over the >Expansion vessel< [18] over 0.1 bar (g)
MATERIAL DAMAGE CAUSED BY MECHANICAL DAMAGE TO THE >EXPANSION VESSEL< [18]

When using the optional sealing sets for Unistate in connection with a static inert gas overlay, a
pressure limit of 0.1 bar (g) must be used.
Designation Specification
Calcium carbonate per liter ≤ 1.5 mmol/l; corresponds to a water hardness of: ≤ 8.4 °dH (soft)
PH value between 6.0 and 8.5
Ultrapure water, distillates Add 0.1 g of sodium carbonate (Na
2
CO
3
) per liter
Not approved water
Distilled, deionized, demineralized, chloric, ferruginous, ammoniacal, or
contaminated river water or sea water
Thermal fluid: Water without ethylene glycol
Use (+15) +65 °C to +90 °C
Thermal fluid: Water-ethylene glycol mixture
Use do not use
For thermal fluids we recommend the media listed in the Huber catalog. The name of a thermal
fluid is derived from its working temperature range and its viscosity at 25 °C.
We recommend inert gas overlay for your temperature control unit. For this we offer the sealing
set for Unistats from our range of accessories. The 400-series temperature control units are as
standard equipped with inert gas overlay connections.
The thermal fluid is protected from environmental influences when using a Unistat. This prevents
an increased accumulation of moisture or the oxidative degradation of the thermal fluid. A further
significant extension of the useful life of the thermal fluid can be achieved by a static overlay with
inert gas. This is especially true if it is intended to work at the operating temperature limits of the
thermal fluid over an extended period of time. (Hygroscopy, oxidation).
Thermal fluid: Water