Heating of domestic water can be made using the
heat pump and/or electrical heater.
Electrical heater (built-in), installation are referred
to as supplementary heating.
DHW PRODUCTION
Your DHW HP can generate DHW with different energy
sources, such as HP and/or electrical heater (built-in)
The energy sources are selected in the menu. They can be
selected individually or in combination.
The desired setpoint temperature for DHW can be adjusted by
the user in the parameter menu in between 5°C and the
installation specific maximum temperature
Tmax
(installer setting).
Tmin
is the setpoint for supplementary heating, It can be
adjusted independently of the DHW set point,
The factory
setting for DHW setpoint is 45°C
and for “
Tmin
” it is 35°C.
The setpoint temperature can be achieved either by the HP
(energy source selection “
Only HP
”) or the supplementary
heating (energy source selection “
Only
EL
”), depending on the
choice of the energy source.
Tmin
is achieved with heat pump
and supplementary heating (energy source selection “
HP +
EL
”), if selected.
The heat pump operates with a hysteresis of +1 -3 °C around
the DHW setpoint. The supplementary heating operates with a
hysteresis of + -1 °C.
The DHW HP is equipped with a permanent and an automatic
defrosting system if the model you acquired has this built-in
(Solenoid valve). This reduces the need for defrosting and
increases efficiency (increased operation cycle).
Nevertheless it is normal, that (especially at low temperatures
and in heavy-duty operation) the evaporator has to undergo a
de-icing procedure. When the evaporator temperature gets too
low the heat pump will stop and the defrosting procedure starts
automatically. For air defrosting this limit is -2 °C, for hot-gas
defrosting -2 °C. Normal operation resumes at an evaporator
temperature of +5 °C.
The LED indicators 17 and 18 of the control panel show the
actual operation mode, the upper LED (17) for the heat pump
and the lower LED (18) for supplementary heating:
Off: Inactive (not selected)
Orange: Selected, but running standby mode
Green: Selected and producing DHW.
17
18
ENGLISH
17
