SMA HM-20 User Manual

20 Application Examples
SMA Solar Technology AG
Operating manual 139HM-20-BE-en-19
Connection via compatible relay
The SG Ready control input of the heat pump is connected directly via a compatible relay.
VAC
Figure 22: Connection of a heat pump via compatible relay
20.2.3 Integration of heat pump into the energy management
Via the SG Ready interface, it is possible to give the heat pump a switch-on recommendation when sufficient PV energy
is available to raise the temperature in the buffer tank.
Switching of heat pump via compatible radio-controlled socket and separate relay
Requirements:
☐ The radio-controlled socket must be in operation.
☐ The separate relay must accept a 230 V
AC
input signal.
☐ The heat pump must have been installed in the system and commissioned in accordance with the manufacturer
specifications.
☐ For the SunnyHomeManager this must be set: Data request interval Automatic (see Section11.3.9,
page59).
General procedure:
1. Include radio-controlled socket in the system (see Section11.5.1, page63).
2. Connect the heat pump to the radio-controlled socket and define basic load characteristics (see Section12.4,
page78), including, for example, the correct power consumption (see Section12.4.4, page81), the minimum
running time (see Section12.4.6, page82) and that the heat pump should only be switched (see Section12.4.9,
page83).
3. Configure the time period (see Section12.5, page84).
Switching the heat pump directly via compatible relay
Requirements:
☐ The compatible relay must have been installed in the system and commissioned in accordance with the
manufacturer specifications.
☐ The heat pump must have been installed in the system and commissioned in accordance with the manufacturer
specifications.
☐ For the SunnyHomeManager this must be set: Data request interval Automatic (see Section11.3.9,
page59).

SMA HM-20 Specifications

General

Brand	SMA
Model	HM-20
Category	Measuring Instruments
Language	English