Important Hydraulic System Components; Heating Water - Buderus Logamax plus GB162 Technical Manual

6 System examples
6.2

Important hydraulic system components

6.2.1

Heating water

Heating water of poor quality encourages the formation of
sludge and corrosion. This can lead to incorrect functions
and can damage the heat exchanger. Therefore, heavily
contaminated heating systems should be flushed through
thoroughly with tap water prior to filling.
Total boiler Sum of alkaline earths/total hardness
output
[kW]
Q < 50
Q ≥ 50
Requirements according to fig. 48 and
Table 23 Table for aluminium heat exchangers
V [m
3,00
2,80
2,60
2,40
2,20
2,00
1,80
1,60
1,40
1,20
1,00
0,80
0,60
0,40
0,20
0,00
Fig. 48 Water treatment limits for single boiler systems
A Above the curves, use fully desalinated fill water with a
conductivity of ≤ 10 μS/cm
B Below the curves, fill with untreated tap water that meets
the requirements of the Drinking Water Ordinance
[Germany]
H Water hardness
W
V Water volume over the service life of the boiler
56
of the fill and top-up water
[°dh]
Requirements according to fig. 48
fig. 49
3
]
≤ 100 kW
≤ 50 kW
B
0 5 10
To prevent damage through scale build-up, the fill water
may require treating, subject to the level of fill water
hardness, system volume and the overall system output.
Max. amount of fill and top-up water V
Requirements according to fig. 48
Requirements according to fig. 48 and fig. 49
A
15 20
≤ ≤
50 kW and 100 kW
6 720 645 821 (2010/09) – Logamax plus GB162
3
[m ]
25 30
H [°dH]
W
6 720 642 463-35.1il
max