Water Pressure Loss - Vaillant ecoTEC plus Instructions For Installation And Servicing

Heating water
Unit
qualities
Electric conductivity
μS/cm
at 25 °C
Appearance
pH-value at 25 °C
Oxygen mg/L
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
Flow Rate (litres/hour)
Fig. 3.8.1 Pressure loss ecoTEC plus 415
Instructions for installation and servicing ecoTEC plus 0020020828_07
Low-salt saline
< 100
100-1500
Free of sedimentary substances
1) 1)
8,2-10,0 8,2-10,0
< 0,1 < 0,02
646 l/hr = 20 diff @ 12 kW
General requirements 3
ecoTEC plus 418 pressure loss graph
Flow Rate (litres/hour)
Fig. 3.8.2 Pressure loss ecoTEC plus 418
ecoTEC plus 428 pressure loss graph
Flow Rate (litres/hour)
Fig. 3.8.3 Pressure loss ecoTEC plus 428
773.86 l/hr = 20 diff @ 18 kW
1220 l/hr = 20 diff @ 30 kW
15