STIEBEL ELTRON OTE 3 Bedienungsanleitung Seite 40

OPERATION
Smart grid function (to BWP standard)
1
=
~
3
kWh
1 Photovoltaic modules
2 Inverter (with switching contact)
3 Heat pump (with OTE control unit)
4 Meter (electricity purchased or fed in)
5 Electrical consumers
6 Public grid
To store photovoltaic energy in the form of thermal energy,
you can combine the following options.
- DHW charging to a higher set value
- Overcharging the heating circuits (higher flow tempera-
ture in heating mode or lower flow temperature in cooling
mode)
- Higher heating set value (fixed buffer set value)
- Lower cooling set value (fixed buffer set value)
- Automatic detection of summer mode: In the summer, the
buffer cylinder is not heated; only DHW charging to the
higher set value is carried out, or cooling to the lower set
value if your system has been configured accordingly.
f If you wish to use this function, please contact our service
department or one of our authorised customer service
partners.
12. Smart grid function (to BWP
standard)
The smart grid function is a standard ("Sg Ready") defined by
the Bundesverband Wärmepumpe (BWP - the german Heat
Pump Association) which enables the heat pump to be con-
trolled in an intelligent power network, or smart grid (Sg).
Through this function, discounted tariffs can be used for heat
pump operation. These tariffs have evolved as a result of the
power surpluses associated with generation from renewable
sources such as wind and solar.
Smart grids aim to smooth out the peaks. Smart grid-ready
heat pumps are switched on preferentially whenever excess
power is available at a cheaper rate; they then store this surplus
energy as hot water or, in cooling mode, as cold water.
f If you have taken out, or wish to take out, an appropriate
smart grid tariff agreement, please contact our service
department.
40 |
2
5
4
13. Building management system
It is possible to specify the set heating/cooling value from a
building management system at the heat pump controller.
This set value can be specified by means of a 0-10 V DC signal
and a changeover contact for heating/cooling. The control unit
can also forward certain operating statuses to the building
management system (e.g.: heat pump running, heat pump in
cooling mode, etc.).
f If you wish to use this function, please contact our service
department or one of our authorised customer service
partners.
14. Specification
6
14.1 Temperature sensor
All of the temperature sensors in the control unit have the same
NTC characteristic of 5000 Ω at 25 °C
Temperature
in °C
-20
-18
-16
-14
-12
-10
-8
-7
-6
-4
-2
0
2
4
6
8
10
12
14
15
16
17
18
19
20
21
22
24
26
28
Resistance in Ω Temperature
in °C
48322.7
43071.6
38447.9
34370.5
30769.4
27584.4 40
24763.2
23474.8
22260.9 44
20038.1 46
18061.0 48
16300.0
14729.4
13326.8
12072.6
10949.6
9942.9
9039.2
8227.2 64
7852.3
7496.6 66
7159.0
6838.4
6534.0
6244.9
5970.1
5709.0
5224.6
4786.3
4389.2
Resistance in Ω
30 4029.2
32 3702.3
34 3405.3
36 3135.1
38 2889.1
2664.8
42 2460.2
43 2364.7
2273.4
2102.6
1946.3
50 1803.2
52 1672.1
54 1551.7
56 1441.2
58 1339.6
60 1246.2
62 1160.2
1081.0
65 1043.7
1008.0
67 973.6
68 940.5
69 908.8
70 878.3
71 848.9
72 820.7
74 767.5
76 718.2
78 672.6
OTE