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Installation, use and maintenance manual

MANUAL CODE: 6328406

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1.4

Operating principle

The appliances in this range produce domestic hot
water using heat-pump technology.  A heat pump
transfers thermal  energy from  a  source  at  a  lower
temperature to a source at a higher temperature,
and vice versa (heat exchanger).
The  appliance  uses  a  hydraulic  circuit  composed
of a compressor, an evaporator, a capacitor and
a  thermal  expansion  valve.  A  refrigerant  fluid/gas
flows in the circuit (see section 4.6).
The  compressor  creates  a  difference  in  pressure
inside the circuit, which creates a thermodynamic
cycle.  The  compressor  aspirates  the  refrigerant
fluid  through  an  evaporator,  where  it  evaporates
at low pressure absorbing heat, compresses it and
forces  it  towards  the  capacitor,  where  the  fluid
condenses  at  high  pressure,  releasing  the

absorbed  heat.  The  fluid  then  passes  through  a
thermal  expansion  valve  and,  decreasing  in
pressure  and  temperature,  starts  to  vaporise  and
enters the evaporator again, restarting the cycle.

Fig. 5 – Operating principle

The appliance operating

principle is as follows

(Fig. 1):

I-II:

the refrigerant fluid aspirated by the

compressor  runs  inside  the  evaporator  and,  while
evaporating,  absorbs  the  ecological  heat
provided by the air.
At the same time, the air in the space is aspirated
by the appliance, thanks to the fan. As it passes on
the  finned  battery  of  the  evaporator,  the  air
releases its heat;

II-III:

the refrigerant gas passes inside the

compressor and there is an increase in pressure
which raises the temperature, turning the gas into
overheated vapour;

III-IV:

in the capacitor, the refrigerant gas releases

its heat in the water in the tank (boiler). This
exchange process transforms the refrigerant from

an overheated vapour into a liquid state,
condensing at a constant pressure and dropping
in temperature;

IV-I:

the refrigerant liquid passes through the

thermal expansion valve, quickly dropping both in
pressure  and  temperature.  It  partially  vaporises,
returning  to  the  initial  pressure  and  temperature
conditions.  The  thermodynamic  cycle  can  now
start again.

HANDLING AND TRANSPORTATION

The appliance is provided in a cardboard box on a
wooden pallet.

For unloading, use a
forklift or pallet jack that
supports up to 250 kg. The
packaged

appliance

must be kept vertical
during

all

operations.

The  appliance  must  be
unpacked  carefully  so  as
not  to  damage  the
casing  if  using  knives  or

cutters to open the cardboard packaging.
After  the  packaging  has  been  removed,  check
that the unit is in one piece. If in doubt, do not use
the  appliance  and  contact  an  authorised
technician.
Before disposing of the packaging, in line with the
environmental  protection  regulations  in  force,
ensure  that  all  of  the  accessories  supplied  have
been removed from the packaging.

WARNING: all packaging components

(staples, polystyrene, etc.) should not
be left within the reach of children as
they are dangerous.

While the appliance is not in use and waiting to be
commissioned, it should be positioned in a place
that is sheltered from the weather.

Ecological
heat

Capacitor

Air

Evaporator

Fan

Compressor

Thermal

expansion valve

Tank