BWT AQA perla XL - Setting the Water Hardness

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7.3 Setting the water hardness
The hardness of drinking water measured on site
and the required outlet water hardness is entered
here.
Information about the outlet water hardness
The Trinkwasserverordnung (German drinking
water ordinance) stipulates a sodium limit of
200 mg/l. The limit has been set this low so that
people on a low sodium diet can still consume
drinking water and use it for cooking.
Reducing the hardness of drinking water by
1°dH increases the sodium content by 8.2 mg/l.
(Drinkingwaterhardness–Outletwaterhardness)
x 8.2 mg/l = increase in sodium content.
IN Drinking water hardness
Enter the measured hardness of the drinking water.
Changenumberandconrm
OUT Outlet water hardness
Enter the required hardness of the outlet water
(residual hardness). (BWT recommends 4 -
8°dH. A residual hardness of > 8.4°dH is required
inAustria).
Changenumberandconrm
Hardness
IN: 22 °d
OUT: 0
20
Hardness IN
6
Hardness OUT
Setting
Time - Date
Unit set-up
Hardness
Installation site
Contact person