CTC Union EcoLogic L, Installation And Maintenance Manual

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CTC EcoLogic M/L
G11
HP 1
1.3.1 Heat pump
CTC EcoLogic can control up to ten heat pumps*, two of which can be
connected via 3-way valves to deliver heat to either the heating circuit or the
DHW circuit.
Heat pump operation is a so-called floating condensation, where the
heat pump heats to the temperature required by the heating circuit. This
temperature varies depending on the outdoor temperature and which set
inclination and adjustment of the heat curve has been chosen. Installed room
sensors affect the temperature required in the heating circuit.
Savings from a heat pump are directly linked to the COP value. COP means
the output in proportion to the supplied power. Thus, COP = 3 means that
for 1 kW of supplied power from the compressor, 3 kW of heat output is
produced.
The lower the temperature the heat pump needs to produce, the higher the
COP value obtained from the heat pump, as this is a more advantageous
operation for the compressor. The heat pump therefore only heats to the
temperature required by the heating circuit. This is economical in terms of
the service life of the compressor and in maximising operating economy.
Buffer Tank, System Types 4-6
If a buffer tank is connected (see the schematic diagrams for Systems Types
4 to 6 in the "Pipe Installation" chapter), the heating circuit can be kept at a
constant temperature.
The heat pump is controlled based on the temperature in the buffer tank.
The compressor starts at a certain predefined time after the sensor in the
tank measures a temperature that is lower than the setpoint for the tank and
stops when the tank measures a temperature difference that is set higher
than the setpoint for the tank. The indoor temperature in conjunction with the
outdoor temperature and chosen heat curve determine at which temperature
the primary flow temperature will be aimed.
Heating buffer tank
*Only applies CTC EcoLogic L. CTC
EcoLogic M can control up to two
heating pumps