Appendix; Water Quality Requirements - Viessmann VITOCROSSAL 300 Service Instructions Manual

Appendix

Water quality requirements

Please note:
Observing the following requirements is necessary to safeguard your
warranty rights.
The manufacturer's warranty excludes damage due to corrosion and scaling.
Requirements to be satisfied by the heating water
Total boiler
output
.
of the system [Q
.
100 kW < Q x 350 kW Ca (HCO
.
350 kW < Q x 1 000 kW Ca (HCO
.
1 000 kW < Q
*1
Apply this equation for heating systems < 100 kW with a specific system volume
y 20 litres/kW.
24
Calcium hydrogen
carbonate concentration fill and top-up water
) [Ca(HCO
3
and top-up water
)
3
)
3
Max. permissible volume of
) ] of the fill [V
2
3
x 2.0 mol/m V
2
3
x 1.5 mol/m the system volume
2
(or calculation V
as below)
V
0.0313 ×
]
max
3
[m ] = three times
max
max.
3
[m ] =
max
.
Q [kW]
Ca(HCO )
3
*1
[mol m 3 ]
2