CTC Union EcoZenith i550 Pro, Installation And Maintenance Manual

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12 CTC EcoZenith i550 Pro
General Information
2.2 DHW
The final heating of the hot water takes place in the upper tank. It also acts
as additional heating for the heating system when the lower tank is not
sufficient.
The hot water is heated using two finned copper tube coils of approx.
40 metres connected in parallel. The coils preheat the water in the lower
tank and the water reaches maximum temperature in the upper tank. The
low inner volume and high rate of water turnover in the copper coil prevents
build-up of bacteria.
With double coils, high draw-off flows can be obtained, as the heat
conduction area is finned, on the inside as well as the outside. For more
information on settings and tips, please see the DHW chapter.
2.2.1 Hot Water Circulation
The hot water coil has a connection for hot water charging, which can be
used to heat an external cold water tank when greater tap capacity of DHW
is required, and allows connection of hot water circulation. This means that
hot water is always available at the tap. To save energy the HWC pump can
be time controlled from the EcoZenith.
See also Upper tank Menu in the Detail Description Menus chapter
(Installer/Settings/Upper tank).