Enertech CTC EcoLogic Family series, Installation And Maintenance Manual, Page: 12 / 128

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CTC EcoLogic Pro/Family
General Information
1.2.1.4 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 is connected to blocks K22/K23/K24/K25 and
then deined under the Installer/Deine system/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.
1.2.1.5 Speed-controlled charge pump
Each heat pump should have a separate charge pump that starts and
stops together with its respective heat pump. If the charge pump is speed-
controlled, the low will be automatically set without adjustment via the
control valve.
In the heating circuit, the charge pump will work towards a ixed difference
between supply and return from the heat pump.
If a speed-controlled charge pump is not installed, the low may be adjusted
manually in accordance with the heat pump’s manual. The difference
between incoming and outgoing water from the heat pump will vary
depending on the operating conditions during the year.
When the outdoor temperature is less than +2°C, the charge pumps
must start in order to protect against frost in cases where an air/water
heat pump is installed. A speed-controlled charge pump will only work at
50% of its maximum capacity. This provides for increased savings on the
charge pump’s operating economy. In addition, the heat losses are lowered
compared with a charge pump with a ixed speed setting.
1.3 DHW
Hot water can be directed from heat pumps, solar panels and additional heat
to the hot water tank.
The required hot water comfort level is set in the DHW menu. In this main
menu, it is possible to schedule increased water temperatures during certain
times of the day.
The stop temperature in the hot water tank is factory-set at 55°C. When hot
water is being drained and the temperature in the tank falls to 5°C below the
stop temperature, the heat pump starts and raises the water temperature
towards the set stop temperature.
The stop temperature is adapted to hot water needs and to the heat pump
model installed.
When there is a requirement for heat in the house at the same time, the heat
pump charges the heating circuit even when the stop temperature (55°C) in
the hot water tank has been reached.