Page 31/44
Page 30/44
05-2021
hager.com
Subject to technical changes
6LE007528B
Connecting the SG Ready interface
Heat pumps and any other devices that are required can be integrated in intelligent electricity
networks through the SG Ready interface. The heat pump and energy storage system commu-
nicate through 2 additional SG Ready relays in the main connection area. The energy manage-
ment controller thus controls the heat pump with preset limits.
ATTENTION!
Before installing the SG Ready interface, ensure that the distribution network
operator's specifications are being met (e.g. if the heat pump is registered as
interruptible consumer unit with a reduced electricity tariff).
The SG Ready label (Figure 32) is awarded [by the Bundesverband Wärmepumpe e. V., the
federal heat pump association] to heat pumps with control technology that makes it possible to
integrate into an intelligent electricity network.
Figure 32: SG Ready label
Hot water heat pumps must have a controller that makes it possible to increase the hot wa-
ter set temperature via automatic activation for the purpose of heat storage.
Heating heat pumps with an SG Ready label must have a controller that covers 4 operating
status.
SG Ready re-
lay switching
Heating heat pumps operating status
Relay 1 = On
Relay 2 = Off
Operating status 1
(locked operation):
This operating status is backward compatible with the EVU lock, which is often
activated at set times, and comprises a maximum of 2 hours "hard" locking.
Relay 1 = Off
Relay 2 = Off
Operating status 2
(standard operation):
In this switching mode, the heat pump runs in energy-efficient normal opera-
tion and fills some heat into the heat storage for the maximum 2-hour
EVU lock.
Relay 1 = Off
Relay 2 = On
Operating status 3
(photovoltaic surplus operation):
In this operating status, the heat pump runs higher within the controller fir
room heating and hot water preparation. It is not a definite start command, but
a switch-on recommendation according to today's increase.
Relay 1 = On
Relay 2 = On
Operating status 4
(operation for curtailment):
This is a definite start command if this is possible as part of the regular set-
tings.
For this operating status, it must be possible to set different control models on
the controller for various tariff and use models:
Variant 1: The heat pump (compressor) is actively switched on.
Variant 2: The heat pump (compressor and additional electric heater)
is actively switched on, optional: higher temperature in the heat
storage
optional
Optionally, the room temperature can be used as a benchmark for controlling
the system temperature (input or return temperature). Locking the heat pump
with a room thermostat that depends on room temperature is insufficient.
Table 7: SG Ready relay operating status
Disconnect the SG Ready control cable from the modular plug-in terminal block and remove
the modular plug-in terminal block.
Snap the two SG Ready relays EN145 of the SG Ready expansion set XEM250 (Figure 33)
on to the DIN rail in the main connection area.
flow
Energy storage system
