Hydrotech Precision-PWS 8-M_8-MST OWNERS GUIDE - Manual (Page 28)

4. Check for scale build up on the walls of the boiler tank and the heating
element. The heating element is the most critical. If there is 1/8” of build
up or more on the heating element, then it is time to clean the boiling tank
using the cleaner descaler. This process is described in the next section.
5. After checking the boiling tank every two weeks for about three months,
you will be able to set up your own schedule as to how often the boiling
tank needs to be cleaned with the cleaner descaler. Distilled water
quantity use and raw water quality will determine your schedule.
Cleaning the Boiling Tank using the Cleaner Descaler
1. Turn all switches off and allow the water distiller to cool down.
2. Remove any loose scale from inside the boiling tank by hand through the
boiler lid. If you are using the optional storage tank, remove the filter
canister and place the sterilization tube onto the coil tube to by pass the
optional storage tank. See Steam Sterilization of Water Distiller Head
in this Maintenance and Cleaning section for more details.
3. Add 3 tablespoons of descaler cleaner to the boiling tank.
CAUTION: Descaler is a corrosive and poisonous substance. Read
safety precautions on the package. As the initial water is added to the
descaler in the boiling tank it will produce a bubbling foam substance. Do
not overfill the boiling tank. Always leave boiling tank lid off when ever the
boiling tank is being descaled to reduce fumes travelling through the
cooling coil. Dispose of the first gallon of distilled water as a precaution.
4. Fill the boiling tank half full with hot tap water.
5. Mix the cleaning solution well to dissolve the descaler in the water.
6. Fill up the remaining portion of the boiling tank with hot tap water to the
bottom of the water gauge pin. See Boiling Tank Water Gauge Pin
Diagram below.
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