Formeco Drester 120, Использование и обслуживание

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6. SAFETY SYSTEMS AND ALARMS
6.1.
Temperature safeties
The distillation unit is equipped with safety features to control the proper working temperature.
A safety thermostat is also installed on the distillate outlet, to assure the proper working conditions.
a. Working temperature
Distillation unit in Temperature Class T2
ST1 Working thermostat 50 - 210 °C
Distillation unit in Temperature Class T3
ST1 Working thermostat 50 - 185 °C
b. Maximum temperature diathermic oil
Distillation unit in Temperature Class T2
ST4 Maximum thermostat (fixed setting) 225 °C
Distillation unit in Temperature Class T3
ST4 Maximum thermostat (fixed setting) 190 °C
The maximum safety thermostat has a manual reset. To reset the thermostat it is necessary to:
1. isolate the power from the machine using the main switch;
2. open the control box of the machine;
3. verify the reason for the thermostat intervention, if necessary replace the defective thermostat;
4. push the reset button on the thermostat to reset it
c. Distillate temperature
ST3 Maximum thermostat on condensate (fixed setting) 40 °C
When the distillate temperature rises above 40°C, this thermostat momentarily blocks the heating of the ma-
chine.
Verify the reason for the alarm, replacing the thermostat if necessary.
d. Temperature alarm
In case the maximum thermostat ST4 or the condenser thermostat ST3 go in alarm, the red alarm light
comes on.
6.2.
Over pressure safety
The working cycle of the machine is performed at atmospheric pressure or under vacuum (for the models
equipped with optional vacuum group).
The cover of the boiler acts as over-pressure valve. The safety valve intervenes at 0,1 bar above atmospheric
pressure.
In case of overpressure formation in the boiler, the machine has to be stopped and the cause for the over-
pressure has to be removed.
Do not interfere with the spring of the cover to prevent the outflow of vapour.