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Puridest Glass Distillation Apparatus
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9
Maintenance, Service and Trouble Shooting
Caution:
Before service and maintenance always let the Glass Distillation Apparatus cool down!
Danger of scaldings!
Caution:
Before opening the Distillation Apparatus and before cleaning always cut off power (pull
the plug or switch the main switch off).
Danger of electrical shocks!
Descaling
During the rinsing process contaminated water is merely exchanged against clean water. Scale deposits in the boiler are
not removed. First press key "cleaning" to start the rinsing process. When, at the end of this process, the boiler is drained,
switch off the Distillation Apparatus on the main switch.
Remove the front screen (lift by the grip holes, tilt to the front and pull down) and pour approx. 100 ml commercial de-
scaling agent (e. g. "rea-calc®" by M/s CHEMOTEC GmbH, 63486 Bruchköbel, Germany) into the front glass funnel
which is on the right-hand side next to the boiler.
After that switch on the Distillation Apparatus and wait until the boiler is filled with water and the heating element is
switched on. When the solution has reached a temperature of maximum 70 °C, switch the Distillation Apparatus off.
Make absolutely sure not to bring the solution to a boil. Allow to react for approx. 1 to 2 hours with the scale deposits. Af-
ter the reaction time of the descaling solution, switch on the Distillation Apparatus again and press key "Clean" to start the
rinsing process. The solution is rinsed and exchanged against clean water, and the Distillation Apparatus will restart normal
operation. Descaling and rinsing processes can be repeated at any time, if required. After descaling, the first few litres of
distillate should not be used as it might contain traces of the evaporated descaling agent.
For Bi Glass Distillation Apparatus (models PD 2 DG and PD 4 DG), the contents of the back boiler (second stage)
should also be discarded after descaling by opening valve
⑦
because here, too, the distillate quality might be reduced by
traces of descaling agent
Sterilising
By pressing key "Sterilise" the tap water inflow (cooling water) is cut-off for a five-minute sterilising period. The steam,
produced by the heating element is used to sterilise the pure water area (condenser) and is allowed to escape through a vent
in the lid of the Distillation Apparatus. After the sterilising period the unit restarts automatically.
Caution:
Heavy steam formation.
Danger of scaldings!