CTC Union EcoZenith i555 Pro 1x230V, Installation And Maintenance Manual

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66 CTC EcoZenith i555 Pro
Periodic extra DHW, days 14 (0...30)
The menu defines the interval for the periodic increase
of the external DHW tank to 65 °C to protect against
legionella.
1 = Every day 2 = Every other day etc.
Max temp diff end DHW °C 3 (2...7)
If there is a heating requirement, DHW charging is
interrupted earlier than the time at which the maximum
temperature has been reached, in order to avoid the
compressor stopping while DHW is swapped for
heating.
Stop DHW diff max °C 3 (2...10)
DHW charging is normally interrupted in the DHW
sensor, but this can also occur in the condensation
temperature which is calculated based on the heat
pump’s internal pressure sensor. The condensation
temperature is significantly increased during DHW
charging. This menu relates to the value from the
maximum permitted condensation temperature
that interrupts DHW charging. If there is a heating
requirement, the system then diverts to charging the
heating circuit.
Run time DHW circ. (min) 4 (1 to 90)
The length of time that domestic hot water circulation
should take place during each period. Applies if "DHW
circulation" has been defined in the "Installer/Define/
DHW Tank" menu.
Time DHW circ. (min) 15 (5...90)
The time during which domestic hot water circulation
takes place. DHW circulation must have been defined in
the "Installer/Define/DHW Tank" menu.
Diff start ext DHW buffer 5 (3...15)
This menu is used to select the temperature difference
at which the charging of the external DHW tank is
required to start. The difference is specified in relation to
the setpoint that is set in the "DHW Program/Stop temp
HP °C" menu.
DHW circ. schedule
This menu displays the scheduled weekday periods
when the DHW circulation pump is to run. The menu bar
is displayed if:
• "DHW circulation" has been defined in the
"Installer/Define/DHW tank" menu.
• a "Schedule" is defined for the DHW Circulation"
function in the "Installer/Define/Remote Control"
menu.
Menu: "Installer/Settings/DHW Tank/DHW circ. Schedule"
In this example, "DHW circulation" is activated every week –
Monday to Friday between 06:30 and 07:00.