n
Pressure reducer
If the mains pressure exceeds 80% of the calibration of the valve or
safety unit (e.g. 5,5 bar (0,55 MPa) for a safety unit calibrated to 7 bar
(0,7 MPa)), a pressure reducer must be installed upstream of the
appliance. Install the pressure reducer downstream the water meter
in such a way as to ensure the same pressure in all of the installation
pipes.
n
Domestic hot water circulation loop
To guarantee the availability of hot water as soon as the taps are
turned on, a circulation loop between the draw-off points and the
recirculation pipes in the DHW calorifer can be installed. A non-return
valve must be included in this loop.
Run the domestic hot water circulation loop via the boiler
control system or an additional timer program to optimse
energy consumption.
n
Measures to take to prevent hot water flow return
Fit a one-way valve to the domestic cold water circuit.
4.6
Electrical connection of the DHW sensor
4.6.1.
DHW tank combined with a MCA boiler
WARNING
Only qualified professionals may carry out electrical
connections, always with the power off.
4. Installation
SR130
17
26/03/2014 - 300009755-001-03
