Formeco Drester 120, Использование и обслуживание

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0 2 : 1 0 S E R V I C E
Service
In the display is indicated also the word
“SERVICE” which flashes when 2000
working hours have been reached; it is
time to replace the thermal oil.
After having replaced the oil, re-set the
plant switching 8 times the knob
“ON/OFF” (see specific chapter in the
instruction manual).
c. Temperature setting
Set the working thermostat to a temperature of 20-30 °C higher than the boiling temperature of the
solvent to be distilled. In the case of Nitro based products or Synthetics set the working temperature at
160 °C.
If the residue has to be dried, the working thermostat has to be set to 170-180 °C.
For more information on distillation temperatures, see the specific tables in the
General Handbook .
Some solvents (e.g. halogenated solvents) are thermally unstable. Pay attention to the working
temperature, otherwise the product will acidify. Set the thermostat on the working temperature
as reported in Table of Non-flammable Solvents.
d. Timer setting
The first time, set the distillation timer at the maximum setting; the time between the beginning of the
cycle and the moment in which no more distillate comes out of the unit will be considered the optimal
time. This time is to be set for successive distillation cycles.
Normally a cycle lasts for 3-4 hours. For drying the residue this time can be prolonged with 15-30
minutes.
Distillation time depends on the type of solvent distilled as well as the degree of contamination. The
indicated distillation times are therefore to be regarded as purely indicative and they refer to a distilla-
tion cycle with cold machine start up. In case of more consecutive distillation cycles, the time of the cy-
cles after the first can be reduced with about 30 minutes.
e. Start of the unit
Switch on the power to the machine with the main switch. The Mains green indicator light and operation
green indicator light will switch on: thus the cycle begins.
The distillate will start to flow out after about 40-50 minutes.
At the beginning of the distillation, check the correct out flow of solvent from the distillation
unit to the collection tank.
The correct functioning of the distillation unit has to be checked at least every 90 minutes.
5.7.
Stop of the unit
At the end of the preset time the heating will stop automatically. The condenser air-fan will operate for an-
other 20 minutes.
To stop the unit manually, rotate the timer knob to 0 (zero).
5.8.
Residue unloading
Before proceeding with the removal of the distillation residue, wait until the diathermic oil temperature is be-
low 50 °C. Turn of the power by turning the main switch.
Provide a container for the collection of the residue and open the cover by:
1. Rotating the locking lever to unlock the cover