Ariston 240, User Manual, Page: 63 / 96

Heat pump water heater – GENERAL INFORMATION
61
Allowed positions Non-allowed positions
1.7 Identification of the appliance
The main information for identifying the appliance is contained on the adhesive data plate located on the water heater
casing.
A model
B tank capacity
C serial no.
D power supply voltage. frequency. maximum absorbed power
E max./min. pressure of the refrigeration circuit
F tank protection
G absorbed power – heating element mode
H marks and symbols
I thermal power yielded in heat pump mode
L max./min. power in heat pump mode
M type of refrigerant and charge
N maximum tank pressure
2. TECHNICAL FEATURES
2.1 Operating principle
The efficiency of a heat pump cycle is measured by the Coefficient of Performance (COP), i.e. the ratio between the
energy supplied to the appliance (in this case, the heat transferred to the water to be heated) and the electrical energy
used (by the compressor and the appliance's auxiliary devices). The COP varies according to the type of heat pump
and to its relative conditions of operation.
For example, a COP value equal to 3 indicates that for every 1 kWh of electrical energy used, the heat pump supplies
3 kWh of heat to the medium to be heated, of which 2 kWh are extracted from the free source.