Heidolph Hei-VAP Advantage - Manual (Page 56)

Operation of the Hei-VAP Advantage
48 Hei-VAP Value, Hei-VAP Advantage
EN
EN
7.1 Setting the heating bath temperature
 The heating bath is filled with heat transfer liquid.
WARNING Hot surfaces during the operation of the heating bath!
Burns.
 Do not touch the interior and the upper edge of the heating
bath, the evaporator flask and the heating bath liquid.
 Wear suitable heat protection gloves when changing the
evaporator flask.
CAUTION Overheated heating bath!
Property damage and visual changes of the heating bath.
 Never operate the heating bath without liquid.
The heating bath has a dry run protection. This must be reset
manually after being triggered (see Errors and Troubleshooting).
The unit has a power backup system. The heating bath is
switched off when the power returns.
The unit maintains the last settings. The rated temperature of the
heating bath is displayed when the power is on.
The remaining residual time is stored by the timer. The timer is
triggered again after the power returns.
In order to achieve a high Distillation rate (dt), the temperature
difference between the heating bath and the vapor temperature
must equal at least 20 K.
General: Doubling the temperature difference results in doubling
the Distillation rate (dT).
For rated temperatures above 100 °C, only suitable oil or polyeth-
ylene glycol (order No.: 515-31000-00; 5L; max. temp.: 240 °C)
may be used as heat transfer medium (observe safety data
sheets, see chapter 4.4.2).
7.1.1 Select heating bath medium
1. Switch on the base unit by pressing the power switch (Figure 5 –1 (1)).
The toggle switch of the base unit must be in the "1" position.
2. Activate the heating bath medium (OIL or H
2
O) (6) with the support of the selection
window by using the rotary pushbutton Hei-GUIDE (9).
3. The selection window flashes when pressing the rotary pushbutton Hei-GUIDE (9).
4. Pressing the Hei-GUIDE (9) again takes over the selected heating bath liquid. The
selection window jumps to "bath temp" and flashes.
The target temperature is displayed when switching the unit on again. The selection
window is on the last selected medium. Confirming the medium and confirming the
target temperature twice will take over the last settings.
The target value is set at 20 °C after a previous change of the heating bath medium
from "OIL“ to "H
2
O“, if a target value of more than 100 °C was set.
Heating bath medi-
um