Domestic Hot Water Heat Pump Service Manual
27
7.10.3 PV Storage operation in BOOST mode
When the photovoltaic mode is set to PV STORAGE and the DHW-HP mode is set to BOOST, the
HP operates when the 0~10V input rises above the D20 (PV Min Voltage HP) and the electrical
heater operates when the 0~10V input rises above the D21 (PV Min Voltage EL) set point.
0~10V input raised in small steps until >5V, set from D20 (PV Min Voltage HP)
HP starts after 5 minutes delay, set from D22 (PV Min Time)
0~10V input raised in small steps until >8V, set from D21 (PV Min Voltage EL)
EL starts after 5 minutes delay, set from D22 (PV Min Time)
0~10V input decreased until <8V, set from D20 (PV Min Voltage HP)
EL stops after 5 minutes delay, set from D22 (PV Min Time)
0~10V input decreased until <5V, set from D20 (PV Min Voltage HP)
HP stops after 5 minutes delay, set from D22 (PV Min Time)
Note:
If water set point temperature is achieved then the heat pump stops operation.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
0
10
20
30
40
50
60
70
80
90
00
:0
0:
00
00
:0
1:
10
00
:0
2:
20
00
:0
3:
30
00
:04
:40
00
:0
5:
50
00
:0
7:
00
00
:0
8:
10
00
:0
9:
20
00
:1
0:
30
00
:1
1:
40
00
:1
2:
50
00
:1
4:
00
00
:1
5:
10
00
:16
:20
00
:1
7:
30
00
:1
8:
40
00
:1
9:
50
00
:2
1:
00
00
:2
2:
10
00
:2
3:
20
00
:2
4:
30
00
:2
5:
40
00
:2
6:
50
00
:28
:00
00
:2
9:
10
00
:3
0:
20
00
:3
1:
30
00
:3
2:
40
00
:3
3:
50
00
:3
5:
00
00
:3
6:
10
00
:3
7:
20
00
:3
8:
30
00
:3
9:
40
00
:4
0:
50
00
:4
2:
00
00
:4
3:
10
00
:4
4:
20
00
:4
5:
30
00
:4
6:
40
00
:4
7:
50
00
:4
9:
00
00
:5
0:
10
00
:5
1:
20
00
:5
2:
30
00
:5
3:
40
00
:5
4:
50
00
:5
6:
00
00
:5
7:
10
00
:5
8:
20
00
:5
9:
30
01
:0
0:
40
01
:0
1:
50
Vo
ltage
Tem
p
e
ratu
re
Time
T3 T water top
R3 Fan
R4 HP
R5 El heater
V in (0-10V)
Fan Off
Fan On
HP Off
HP On
El H Off
El H On