Huber Pilot ONE Unistat T3*0, Operation Manual

Page: 73 / 100

Setup mode
Chapter 4 OPERATION MANUAL
V2.4.0en/22.07.20//17.12
Unistat® T300 Series
73
4.4.2.2 Degassing externally open applications
Hot or cold thermal fluid and surfaces
BURNS TO LIMBS

Avoid direct contact with the thermal fluids or the surfaces.

Wear your personnel protective equipment (e.g. temperature-resistant safety gloves, safety
goggles, safety footwear).
When changing from low-boiling thermal fluid (low-boiling component) to higher boiling thermal
fluid, remains of the low-boiling component may remain in the temperature control unit. Depend-
ing on the working temperature, the low-boiling component begins to boil, gas bubbles form and
cause the pump pressure to momentarily collapse. This may cause a safety shutdown. The gas
bubbles reach the bath opening and can escape.
If ice crystals form on the evaporator coil, water has accumulated in the thermal fluid. If this is the
case, degas to avoid damage to the temperature control unit.
Thermal fluids are hygroscopic (water-attracting) to a greater or lesser degree. This effect increases
as the working temperature decreases. The off-gassing mode below, which must be
permanently
monitored
, also helps you remove any water residues from the temperature control circuit.
PROCEDURE

Follow venting with the degassing operation. Prerequisite: You have filled the temperature control
unit in accordance with the instructions on page 71 in section »Filling and venting externally open
application« and/or cleaned it as per page 92 in section »Rinsing the thermal fluid circuit« .

Go to the “Home” screen.

Tap on the keypad symbol next to “T
Setpoint
”.

Enter a setpoint using the number keypad that appears. This setpoint must be below the boiling
point of the low-boiling thermofluid. The setpoint will be increased in 10 K steps during the de-
gassing process up to the maximum working temperature.

Confirm your entry by tapping on “OK”.

In the display that follows, confirm your entry again by tapping on “OK”.
The correct selection will be displayed graphically and the setpoint will be changed immediately.
If tapping on “OK” is not correct, it will be displayed graphically for 2 seconds. The display will re-
turn to the “Home” screen. Try changing the setpoint again.

Tap on the “Start” touch button.

Confirm the start of temperature control by tapping on “OK”.
The correct selection will be displayed graphically and temperature control will start immediate-
ly. If tapping on “OK” is not correct, it will be displayed graphically for 2 seconds. The display will
return to the “Home” screen. Try starting the thermoregulation again.

Carry out temperature control to the entered setpoint until no more gas bubbles rise up.

Increase the setpoint by 10 K and carry out temperature control until no more gas bubbles rise up.

Repeat increasing the setpoint by 10 K until the maximum working temperature of the thermal
fluid has been reached.

Tap on the “Stop” touch button as soon as no more gas bubbles rise up at the thermal fluid's
maximum working temperature.

Confirm the stop of the temperature control process by tapping on “OK”.
The correct selection will be displayed graphically. Thermoregulation is stopped immediately and
the pump continues to run for approx. 30 seconds. Wait until the pump stops. If tapping on “OK”
is not correct, it will be displayed graphically for 2 seconds. The display will return to the “Home”
screen. Try stopping the temperature control process again. The de-gassing process is complete.
4.4.2.3 Draining externally open applications
Hot or very cold thermal fluid
SEVERE BURNS/FROSTBITE OF LIMBS

Before draining, ensure that the thermal fluid has room temperature (20 °C).

If, at this temperature, the thermal fluid is too viscous to be drained: Control the temperature
of the thermal fluid for a few minutes until the viscosity will allow drainage. Never control the
temperature of the thermal fluid when the Drain is open.

Danger of burns when draining thermal fluids at temperatures above 20 °C.

Wear your Personal Protective Equipment for draining.

Only drain using suitable drainage hose and collecting container. These must be compatible
with the thermal fluid and its temperature.