Formeco Drester 120, Использование и обслуживание

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7. DEFECTS AND SOLUTIONS
DEFECTS CAUSES REMEDIES
During automatic loading the machine
does reach the level controller (optional)
The set loading time is too short Augment loading time
Low compressed air pressure
Higher the air pressure to increase the
loading speed of the pump
The unit is ‘ON’ but does not heat
Working thermostat at zero Set working temperature
Electrical resistance burned out Change the electrical resistance
One of the thermostats is faulty Change the faulty thermostat
The distiller heats but does not distil
Boiler is dirty Clean the boiler
Solvent boiling temperature is higher
than the one set on working thermo-
stat Set a higher temperature on the work-
ing thermostat
Solvent boiling point is higher than
distiller maximum working tempera-
ture Change the solvent with one that has
a lower boiling point or distil under
vacuum with suitable kit (optional)
Diathermic oil is worn out Change the diathermic oil
Lack of diathermic oil Top up the diathermic oil till the mini-
mum level when the machine is cooled
down
The unit distils only part of the dirty sol-
vent
Insufficient operating time Increase the operating time
The undistilled fraction has a boiling
temperature higher than the set tem-
perature on the working thermostat
Set a higher temperature on the work-
ing thermostat
Solvent boiling point is higher than dis-
tiller maximum working temperature
Change the solvent with one that has
a lower boiling point or distil under
vacuum with suitable kit (optional)
The working thermostat is defect Change the working thermostat
Distillation time is much longer than the
maximum setting time
There is a considerable percentage of
water in the dirty solvent Replace the solvent
Lack of diathermic oil Top up the diathermic oil till the mini-
mum level when the machine is cooled
down
Diathermic oil is worn out Change the diathermic oil
The electrical resistance is scaled Take out the diathermic oil and clean
the electrical resistance
The cycle does not stop at the time set
on the working timer
Cycle timer is defect Replace cycle timer
The distillate comes out dirty
Unit has been loaded with a quantity
higher than the maximum
Load the exact quantity
Solvent foams
Load with a lower quantity
Use the anti-foam kit
Reduce working temperature
Temperature set on working thermo-
stat too high
Reduce working temperature
Vapour manifold or vapour condenser
dirty Wash manifold and condenser by pour-
ing in clean solvent with a funnel or by
blowing in compressed air
Distillate takes on a greenish colour Condenser is corroding
The solvent is acid, replace the copper
condenser with a stainless steel one
The temperature setting is too high and
the solvent acidifies: set a lower working
temperature
If the temperature set on the working
thermostat is correct, acidification has
occurred before the distillation. Replace
the solvent immediately.