Your brewer and water cooler share a low watt density, external hot water tank heater. If has a larger
area to spread heat comparing to ordinary internal water heating elements. You may experience a
buildup of mineral scale or calcium deposits, depending on mineral content of the water. Still, build up
occurs at a much slower rate than with an internal heaters. Mineral scale is non-toxic, however it can
affect the brewer's performance by interfering with internal valves. Descaling your brewer helps main-
tain clean internal parts that come in contact with water.
If you are using mineral or filtered water, the brewer should be descaled every year to ensure optimal
performance or whenever there are white deposits in the hot water tank. It is possible for calcium
deposits to build up faster, making it necessary to descale more often. If you use distilled or RO water
descaling is not required.
This is how to descale your hot water tank:
Step 1. Make sure you have at least half a gallon of undiluted white vinegar on hand.
You will also need a 1½ gallon jug and access to a sink.
Step 2. Switch off the cooler by unplugging power cord. Remove the 5 gallons bottle. Drain all the
water out through the drain at the back. Replace the drain plug.
Step 3. Place the probe into the container with vinegar.
Step 4. Plug the power cord into an outlet. Hold the reset switch for the door to start the cooler and
get the pump working. Fill the cooler with vinegar.
Step 5. Check if hot tank is full of vinegar by dispensing it from hot water faucet.
Step 6. Remove the container filled with the vinegar and close the door.
Step 7. Turn on the Hot Water Switch (see #15 on page 9) and allow it to sit for at least 30 minutes.
Step 8. After the prescribed period of time, unplug the cooler, drain the vinegar through the drain on
the back.
Step 9. Rinse by closing the drain and placing a 5 gallons bottle or other container with tap water
inside of the compartment with the probe inserted into it. Plug the cooler back in to fill the hot
and cold tank with tap water.
Step 10. Rinse with tap water until smell goes away .
Step 11. Turn on the Hot Water Switch (see #15 on page 9) and let it sit for 30 minutes.
Step 12. Drain the water through the back drain again by following previous instructions.
Step 13. Repeat rinsing until the vinegar smell is gone and there is no sign of calcium deposits left
(they may get dissolved or show up as small white crystals).
Step 14. Place the 5 gallons bottle back and enjoy your brewer/water cooler once again.
DESCALING YOUR COFFEE BREWER / WATER COOLER
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