Product details
6 720 805 339 (2014/09)
5
2.4
Standard delivery
Fig. 1
[1]
Twin coil DHW cylinder
[2]
Temperature and pressure relief valve
[3]
Immersion heater, 3 kW
[4]
Tundish Ø 15/22 mm
[5]
Solar high limit thermostat
[6]
Cold water inlet control group with anti-vacuum valve
[7]
2-port valve
[8]
Dual cylinder thermostat
[9]
DHW expansion vessel incorporating fixing bracket
[10] Connection set
[11] Set of printed documents for the appliance and ErP label
2.5
Scaling/Corrosion protection
The cylinder is made from corrosion-resistant Duplex stainless steel.
The cylinder can be used with all mains water supplies.
Scaling: In cases where the water hardness is very high (over 450 ppm)
a water softener must be used to protect the cylinder against rapid
development of scale.
Corrosion protection: Any water softener shall be installed,
commissioned and maintained to ensure the water hardness after the
softener is never below 150 ppm.
2.6
Description of function
• If there is insufficient heat input available via the primary (lower) coil,
the secondary heating appliance will heat the upper coil.
• Due to temperature stratification only the upper section of the
cylinder will be heated.
• When hot water is being drawn off, the cylinder temperature in the
upper section drops by approximately 8 °C to 10 °C before the heat
source reheats the cylinder.
AQU-18-3W
AQU-16-3W
AQU-17-3W
AQU-21-3W
AQU-31-3W
1
4
5
6
7
8
9
10
11
2
3
6 720 645 525-07.4GX
