Installation Manual
15Instructions for installation and servicing ecoTEC plus 0020020828_07
Heating water
qualities
Unit Low-salt saline
Electric conductivity
at 25 °C
μS/cm < 100
100-1500
Appearance Free of sedimentary substances
pH-value at 25 °C 8,2-10,0
1)
8,2-10,0
1)
Oxygen mg/L
< 0,1 < 0,02
1) With aluminium and aluminium alloys, the ph value range is
restricted from 6.5 to 8.5.
Table 3.3 Guidelines for heating water: Salinity
b
Caution!
Aluminium corrosion resulting in leakages
caused by unsuitable heating water!
Unlike materials such as steel, cast iron or cop-
per, aluminium is reactive to alkalised heating
water (pH-value > 8,5) which results in signifi-
cant corrosion.
With aluminium, ensure that the pH value of
the heating water ranges between 6.5 up to a
maximum of 8.5.
b
Caution!
Risk of material damage if the heating water is
treated with unsuitable frost or corrosion pro-
tection agents!
Frost and corrosion protection agents may
cause changes in the seals, noises during heat-
ing and possibly subsequent damage.
Do not use any unsuitable frost or corrosion
protection agents.
3.16 Water pressure loss
ecoTEC plus 415 pressure loss graph
Water pressure loss (metres head of water)
Flow Rate (litres/hour)
646 l/hr = 20 diff @ 12 kW
Fig. 3.8.1 Pressure loss ecoTEC plus 415
ecoTEC plus 418 pressure loss graph
Water pressure loss (metres head of water)
Flow Rate (litres/hour)
773.86 l/hr = 20 diff @ 18 kW
Fig. 3.8.2 Pressure loss ecoTEC plus 418
ecoTEC plus 428 pressure loss graph
Water pressure loss (metres head of water)
Flow Rate (litres/hour)
1220 l/hr = 20 diff @ 30 kW
Fig. 3.8.3 Pressure loss ecoTEC plus 428
General requirements 3