Hydrotech Precision-PWS 12-12 OWNERS GUIDE - Manual (Page 34)

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5. Add 3 tablespoons of descaler cleaner to the boiling tank.
6. Fill the boiling tank half full with hot tap water.
7. Mix the cleaning solution well to dissolve the descaler in the water.
8. 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.
Boiling Tank Water Gauge Pin Diagram
9. Let the solution stand overnight. Leave the boiling tank lid off during
cleaning to prevent descaler fumes from entering the cooling coil.
10. The next morning or when the mineral content is soft, drain the boiling
tank using the ball valve. Remove any remaining loose scale by hand
using rubber gloves.
11. Repeat cleaning if necessary.
12. Once all the scale has been removed, rinse the boiling tank several times
with warm tap water and remove any large pieces of scale by hand.
13. Replace the drain strainer. The strainer stops large impurities from
plugging the ball drain valve or Automatic Electric Drain valve.
14. Replace the boiling tank lid and complete steam sterilization process on
the boiling tank. See Steam Sterilization in this Maintenance and
Cleaning Section. Reinstall the filter canister.
15. The boiling tank is now clean and ready to produce pure water again.
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.
WATER
GAUGE
PIN
DRAIN STRAINER ATTACHED
TO THE DRAIN HOLE
WATER LEVEL
INSIDE BOILER
DRAIN
STRAINER
IMPURITIES
DRAIN OUTLET