Viessmann Vitomax HS M73 Operating And Service Instructions page 24

Water quality
Saline boiler feedwater requirements
Recommendation
Use an ion exchanger with a colour display and a
transparent cylinder. This allows you to determine the
level of depletion.
Standards used to test the parameters:
Acid capacity
Conductivity
Copper
Iron
*6 There is currently no European or international standard available. See for example DIN 38405-21 German standard meth-
ods for the examination of water, waste water and sludge; anions (group D); determination of dissolved silicic acid by spec-
trometry (D 21).
As an alternative, with specified values the permanganate index can be measured according to ISO 8467.
*7
24
(cont.)
EN ISO 9963-1
ISO 7888
ISO 8288
ISO 6332
Oxygen
pH value
Phosphate
Potassium
Silicic acid *6
Sodium
TOC
*7
Total hardness of calcium (Ca) +
magnesium (Mg)
ISO 5814
ISO 10523
ISO 6878 1
–
ISO 9964 2
–
–
ISO 9964 1
–
ISO 8245
ISO 6059