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CTC EcoZenith i555 Pro
Upper tank
Lower tank
port 1
port 2
2.3
Heat pump
The EcoZenith is designed with two parts in order to ensure the heat pump
operates to maximum possible economy.
The heat pump is connected via two 3-way valves to the EcoZenith and
ensures that the heat is directed into the upper and lower tanks, respectively.
For instance, when the heat pump pumps towards the upper tank, the 3-way
valves send the fl ow to the two uppermost connections, so that the fl ow
enters port 1 and exits through port 2.
The heat pump operates in two different ways, depending on whether it is the
upper tank or the lower tank being charged.
2.3.1
Upper tank
The fi nal hot water heating takes place in the upper tank. This means that, with
a high upper tank temperature, an ample DHW supply is obtained.
The upper tank has a factory-set stop temperature of 55°C, which means
that the heat pump will work to achieve this temperature in the upper tank.
When DHW is being drawn off and the temperature in the upper tank falls
to 5°C below the stop temperature, the heat pump starts up and raises the
temperature towards the set stop temperature.
The stop temperature can be adapted to DHW needs and to the heat pump
model installed.
When there is also a need for heat in the house, the 3-way valves will
automatically reverse direction and the heat pump continues to heat the
lower tank as soon as the stop temperature 55°C in the upper tank has been
reached. If the upper tank has not reached the stop temperature 55 °C within
the factory-set charging period of 20 minutes, the 3-way valves reverse the
direction and the heat pump charges the lower tank. This is to prevent loss of
temperature in the heating circuit.
Also refer to the "Upper tank" section in the "Detailed Menu Descriptions"
chapter (Installer/Settings/Upper Tank).
Pressure/level switch
In some cases, extra protection is required due to local requirements or
provisions. For example, the requirement in some areas is for the system to be
installed within a water catchment area. The pressure/level switch connects to
terminal blocks K22/K23/K24/K25 and is then defi ned in the "Installer/Defi ne/
Def. Heat Pump" menu. If there is a leak, the compressor and brine pump stop
and the "Flow/level switch" alarm appears on the display.
Содержание EcoZenith i555 Pro 1x230V
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Страница 168: ...Enertech AB P O Box 309 SE 341 26 Ljungby Sweden www ctc se www ctc heating com 162 505 72 1 2020 09 22 ...