WL100
Manual Page 17 Revision: 1‐14‐2019
HOT TANK DESCALING INSTRUCTIONS
The hot tank requires removal of mineral deposits (descaling) on a regular basis depending upon
local water conditions. Descaling should take place every 6 to 12 months to preserve long‐term
reliability when source water has high mineral content or high TDS. Descaling removes calcium
deposits, or scale, that can build up inside a tank over time. Scale is non‐toxic but left unattended
will hinder your unit’s performance and result in a drip to the faucet as water expands in the hot
tank while heating. Excess scale results in higher energy consumption and may cause premature
failure of the hot tank. It is critical to descale the entire hot tank including the expansion or vent
chamber to ensure proper operation. A random drip of hot water out the faucet is key indication
the expansion chamber is not functioning properly, and descaling may be needed.
Use non‐toxic cleaner such as ScaleKleen, DEZCAL, 20% Citric Acid Solution, or Vinegar Solution to
remove mineral deposits as directed by the manufacturer.
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 dispensed from the faucet
20 Liter (5 gallon) container or a drain basin
Citric Acid Based Descaler or Vinegar
¼” Plastic Tubing, at least 4 feet in length, and assorted ¼” quick connect fittings
Inline Sanitizing Cartridge (Waterlogic Filter Sump without cartridge works well)
Food Coloring – FDA safe and biodegradable recommended.
1.
Bypass Filters before starting the Descaling Procedure.
2.
Put descaler per directions and 3 drops of food coloring into the descaling cartridge.
3.
Connect Descaling Cartridge to the inlet water supply and connect to Inlet Bulkhead Fitting on the
back of
WL100 Water Treatment System
. Turn on Water Supply.
4.
Select Hot Water and depress the Main Dispensing Button on the Front Control Panel until
descaling solution (colored water) comes out of the Faucet. Container and drain basin will be
required to catch water from the faucet.
5.
Turn off water supply and remove Sanitizing Cartridge from inlet water supply. Reconnect water
supply to Inlet Fitting.