Domestic Hot Water Heat Pump Service Manual
24
PV operation is set up using a combination of the following functions:
Code
Set point
name
Description
Range
Factory
setting
B5
OFF
The PV function is not active. If this function is activated, the heat pump
and the electric heater can start only if the input voltage in GC1 (0-10V)
is higher than D20/D21 (PV min Voltage HP/EL) for longer than D22 (PV
min time).
OFF/ ECO/
STORAGE
ECO
PV ECO
The PV function allows for water heating only with the heat pump until
temperature set point defined by the MODE of operation is reached.
PV STORAGE
The PV function allows for water heating to the maximum temperature
level, giving priority to the operation of the heat pump if the BOOST or
BACK UP mode is not active. The heat pump operates alone until the
max allowed temperature for the heat pump operation D33 (T HP Max)
is reached. The electric heater operates only from D33 to the maximum
allowable temperature D9 (Water T max).
D20
PV min
Voltage HP
The minimum voltage (V) required to start the HP
when the PV function is active.
0-10
0
D21
PV min
Voltage EL
The minimum voltage (V) required to start the electric heater when
the PV function is active.
0-10
0
D22
PV min time
The minimum time (minutes) at which the input voltage from the PV
panel should be above the set point D20/D21 (PV min Voltage HP/EL)
in order to start the electric heater or heat pump when the PV function
is active D22 also regulates the minimum heat pump operational time
when started by the PV function.
1-120
15
The following operational charts have these settings applied:
i) D20 (PV min voltage HP) set to 5V
ii) D21 (PV min voltage EL) set to 8V
iii) D22 (PV min time) set to 5mins
iv) PV mode selected from B5 dependant on operation required (ECO or STORAGE)
