Honeywell NK300soft Installation Instruction page 18

14. Determination of the maximum capacity of the softening cartridge
The determination of the maximum capacity of the softening cartridge (tables A and B) is carried out in accor-
dance with VDI (Verein Deutscher Ingenieure - Society of German Engineers) in relation to the overall
heating power.
14.1GERMANY: Requirements according to VDI 2035 page 1
Overall heating
power 0 to less than 20 litres/kW 20 to less than 50 litres/kW as of 50 and more litres/kW
Softening to less than 16,8°*
Softening to less than 8.4°
0 to 50 kW
Minimum requirement:
Softening to less than 11.2°
Softening to less than 8.4°
50 to 200 kW
Minimum requirement:
Softening to less than 8.4°
200 to 600 kW
Minimum requirement:
Softening to less than 0.11°
more than 600 kW
* For equipment with circulating water heaters and for systems with electrical heating elements, the equated refe-
rence value for the sum of alkaline earth metals ≥ 3.0mol/m
14.2AUSTRIA: Requirements according to ÖNORM H 5195-1
The determination of the maximum capacity of the softening cartridge (tables C and D) is carried out in accor-
dance with the Önorm (Österreichisches Normungsinstitut - Austrian standardisation institute) in relation to
the overall water content of the entire heating system.
0 to 1000 litres
Minimum requirement:
Softening to less than 17°
Recommendation:
Softening to less than 6°
⇒ See table C
MU1H-1546GE23 R0908
Specific system volume (system volume/smallest individual heating power)
Reference value:
Recommendation:
⇒ See table A
Recommendation:
⇒ See table A
⇒ See table A
⇒ See table B
Overall water content of the entire heating system
1000 to 5000 litres
Minimum requirement:
Softening to less than 6°
⇒ See table C
GB
Minimum requirement:
Softening to less than 11.2°
Recommendation:
Softening to less than 8.4°
⇒ See table A
Minimum requirement:
Softening to less than 8.4°
⇒ See table A
Minimum requirement:
Softening to less than 0.11°
⇒ See table B
Minimum requirement:
Softening to less than 0.11°
⇒ See table B
, equivelent to 16.8 °dH.
³
18
Minimum requirement:
Softening to less than 0.11°
⇒ See table B
Minimum requirement:
Softening to less than 0.11°
⇒ See table B
Minimum requirement:
Softening to less than 0.11°
⇒ See table B
Minimum requirement:
Softening to less than 0.11°
⇒ See table B
Over 5000 litres
Minimum requirement:
Softening to less than 0.5°
⇒ See table D
Honeywell GmbH