DE DIETRICH KALIKO TWH 200E - TWH 300E - TWH 300EH - Manual (Page 30)

CAUTION
If the mains pipes are made of copper, fit a sleeve made
of steel, cast iron or any other insulating material between
the tank’s hot water outlet and the pipes to prevent
corrosion to the connection.
n Connecting the domestic cold water
Make the connection to the cold water supply according to the
hydraulic installation diagram.
Install a water drain in the boiler room and a funnel-siphon for the
safety unit.
The components used for the connection to the cold water supply
must comply with the prevailing standards and regulations in the
country concerned. Fit a one-way valve to the domestic cold water
circuit.
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 Measures to take to prevent hot water flow return
Fit a one-way valve to the domestic cold water circuit.
4.6.2. Connection to a boiler (Version EH)
CAUTION
Before making the water connections of the heating circuit
and domestic hot water tank heat exchanger, it is
imperative to rinse the circuits to remove any particles
which might damage the components (safety valve,
pumps, valves, ...).
4. Installation TWH 200E TWH 300E TWH 300EH
28 03/02/2014 - 300026515-001-03