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fi g. 11 - Heat pump operating principles
Ev
Dt
Cn
Cp
1kW
COP 4
4kW
20 °C
PAC
HP - Heating Pump
Ev - Evaporator
Cp - Compressor
Cn - Capacitor
Dt - Expansion Valve
Air energy
Heat produced
Electrical
energy
consumed
• Domestic hot water (DHW) operating principles
Two domestic hot water (DHW) temperatures can be
set: Comfort and ECO.
The default DHW program is set to the Comfort
temperature between 00:00 and 05:00 and between
14:30 and 17:00 and to the ECO temperature for the
rest of the day. This optimises electrical consumption
while ensuring comfortable water temperatures.
The ECO temperature setpoint may be useful to avoid
restarting the DHW too often and for too long during the
day.
The production of domestic hot water (DHW) is started
when the temperature in the tank drops to 7°C below
the temperature setpoint.
The heat pump produces the domestic hot water, which
is then additionally heated, if required, by the tank's
electrical backup or by the boiler. To ensure a DHW
setpoint over 55°C, the electrical backup heating must
be left on.
The production of DHW takes priority over heating;
Where there is simultaneous demand for DHW and
heating, the heat pump will regulate assigned time
periods.
Anti-legionella cycles can be programmed.
• Fan convectors with integrated control system
Do not use a room sensor in this hydraulic circuit.
HP
Alfea Extensa A.I. R32 / INSTALLATION / 2114 - EN
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