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CTC EcoZenith i555 Pro
2.5
Additional boiler (pellets, oil, gas,
electricity)
The EcoZenith can control an external additional boiler (pellets, oil, gas,
electricity). The additional boiler is connected to the upper tank. Use the
menu to select whether the external additional boiler should have high or low
priority. If high priority is selected, the external additional boiler is activated
before the electric heater(s); when low priority is selected, the electric
heater(s) is/are activated fi rst.
After a certain delay, which is factory set at 120 minutes, the unit with low
priority is also started and helps the heat source with high priority.
If the electric heaters are the lowest prioritised additional heat, the following
must also be fulfi lled in order for them to start: The temperature in the upper
tank must be 4°C below the setpoint for the additional heat.
If the external boiler is the lowest prioritised additional heat, the following
must also be fulfi lled for it to start: The temperature in the upper tank must
be 3°C below the setpoint for the additional heat and the electric heaters
must have moved along to the desired value (100% of set value) or to 6 kW
in the fi rst two hours after a power failure.
The EcoZenith handles start and stop of the charge pump between the
external boiler and the EcoZenith.
The charge pump starts when there is a need for an external boiler.
If a temperature sensor is installed and an extra boiler is defi ned, the charge
pump starts when an external boiler has reached the set temperature
(factory set at 30°C).
The charge pump stops when there is no need for an external boiler. A stop
delay of the charge pump can be set so that the charge pump runs even if
the external boiler is off.
Also refer to the "External boiler" section in the "Detailed Menu
Descriptions" chapter. (Installer/Settings/Ext boiler).
Schematic diagram only the installer adds expansion vessels, safety valves, etc., and sizes the system.
Summary of Contents for EcoZenith i555 Pro 1x230V
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Page 152: ...152 CTC EcoZenith i555 Pro 18 Wiring diagram relay card 3x400V ...
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Page 154: ...154 CTC EcoZenith i555 Pro 19 Wiring diagram relay card 1x230V ...
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Page 156: ...156 CTC EcoZenith i555 Pro 20 Wiring diagram relay card 3x230V ...
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Page 158: ...158 CTC EcoZenith i555 Pro 21 Wiring diagram for expansion card ...
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