Huber Pilot ONE Unistat T3*0, Operation Manual

Page: 92 / 100

Service/maintenance
OPERATION MANUAL Chapter 7
Unistat® T300 Series
V2.4.0en/22.07.20//17.12
92
7.4.3 Rinsing the thermal fluid circuit
Setpoint and overtemperature protection are not adjusted to the thermofluid
MORTAL DANGER FROM FIRE

The cut-out value of the overtemperature protection must be adapted to the thermofluid. Set the
cut-out value of the overtemperature protection 25 K below the fire point of the thermofluid.

The setpoint set during rinsing must be adjusted to the thermofluid used.
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«
.
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.
The inner components of the temperature control unit must be dried out Need to avoid boiling
retardation during future uses (e.g. use of a silicone oil at temperatures above about 100 °C).
PROCEDURE

Drain the temperature control unit as described on page 70 in section
»Draining externally
closed applications«
or on page 73 in section
»Draining externally open applications«
.
Residual thermal fluid can remain in the pump chamber and the internal lines after draining. Leave
the temperature control unit with open valves for a while.

Leave the drain hose mounted to the
>Drain<
[8].

Leave the drain hose attached to the
>Expansion vessel drain<
[9] (if present).

Check the filling level of the collecting containers at the other ends of the draining hoses. Follow
the instructions for the disposal of thermal fluid on page 17 in Section
»Proper disposal of re-
sources and consumables«
.

Close the drain valves on the temperature control unit by turning them clockwise (turn 90° right
as far as they will go).

Re-fit the knurled screw to the
>Drain<
[10] (if present).

Connect the
>Circulation flow<
[1] with the
>Circulation return<
[2] to the temperature control
using a bypass hose.
Perform the following steps without attaching a short circuit hose, if the application used by you (exter-
nally closed) is also dirty. In this case, leave your externally closed application connected to the tempera-
ture control unit. This rinses the temperature control unit and your application at the same time.

Fill
the system (minimum fill level) with the thermal fluid you wish to use. The filling process is
described on page 67 section
»Filling and venting externally closed application«
.

Vent
the system as described on page 67 section
»Filling and venting externally closed application«
.
Example: Connecting a
short circuit hose