Hot Tank Descaling - WaterLogic WL3FW FIREWALL Manual

The Hot Tank requires removal of mineral deposits (descaling) on a regular basis. Typically descaling
should take place every 6 to 12 months to preserve the long-term health of your unit.
Use non-toxic cleaner such as ScaleKleen, DEZCAL or 20% Citric Acid Solution to remove mineral
deposits as directed by the manufacturer depending upon filtration and local water conditions.
Descaling is an important process that removes calcium deposits, or scale, that can build up inside a
tank over time. Calcium and scale is non-toxic but if left unattended will hinder your unit's
performance.
WARNING! PERSONAL PROTECTIVE EQUIPMENT REQUIRED. Always ensure proper ventilation
and use rubber or nitrile gloves and eye protection when using chemicals. Refer to Material
Safety Data Sheet for specific requirements of each product.
CAUTION! STAINLESS STEEL TANK DESCALING
The Hot Tank is made from stainless steel. Ensure descaling solution is compatible with stainless
and always flush the unit completely. Dispose in an environmentally safe manner.
Materials Needed:
• Personal Protective Equipment. Rubber or Nitrile Safety Gloves and Protective Eyewear
• Phillips Screwdriver
• Temperature Gauge
• Water Pitcher or Container to collect water from the faucet
• 20 Litre container or drain basin
• Citric Acid Based Cleaner
• ¼" Plastic Tubing, at least 1m in length, and assorted ¼" quick connect fittings
• Empty Cartridge
1. Put descaler solution as per directions into the empty cartridge.
2. Connect descaling cartridge to the inlet water supply and connect to inlet bulkhead fitting on the
back of the WL3FW Water Treatment System. Turn on Water Supply.
1. Select Hot Water and depress the Main Dispensing Button on the Front Control Panel until
descaling solution (cloudy water) comes out of the faucet. Pinch the hot water overflow
tube to ensure sub tank is full of descale solution. Container and drain basin will be
required to catch water from the faucet.
3. Turn off water supply and remove the empty cartridge from inlet water supply. Reconnect water
supply to inlet fitting.
4. Allow descaling solution to remain in the Hot Tank for 15 minutes (length of time may vary
depending on water conditions).
WL3 FW Manual
HOT TANK DESCALING PROCEDURE
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Page 17 - Revision: EU 17-09-2020