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Additionalfunctions
30.4 SmartGrid(SG)
The Smart Grid (SG) function allows the power supply utility (PSU) to optimally
adjust grid utilisation through intelligent control of consumers.
Usingexternalswitchingcommands(oatingcontactsSG_0andSG_1on
terminals X1 – 9/10 and X1 – 11/12), the compressor and/or electric heater
operation can be blocked, or requested with/without an increase in the set heating/
DHW temperatures, or the active cooling function enabled.
The heat pump can be operated using a compressor, electric heater, or both a
compressor and electric heater.
The SG function status message is shown on the status pages of the BM-2
programming unit and in the "Displays"/"Heating appliance" submenu on the
AM display module and BM-2 programming unit.
TheSGfunctionforheatingisonlypossibleinsystemcongurationswithheader
return temperature sensor SAF (T_headerRTN) and where the outside temperature
is below the set winter/summer changeover.
For active cooling by the SG function, active cooling must be enabled in the AM/
BM-2 standard settings, as well as in contractor parameters WP058 and WP033.
In addition, the outside temperature must be above the set winter/summer
changeover and the enable temperature for active cooling (WP053).
If standby mode is set on the BM2 programming unit, the SG function is not
available.
Terminal X1
9/10
(=SG_0):
Terminal X1
11/12
(=SG_1):
Function: SG status:
Open Open Heat pump standard mode Standard mode
Open Bridged Start recommendation (= activation on heating/cooling demand even
outside set switching times and on shutdown during automatic mode
(ECO-ABS))
Start
recommendation
Bridged Open Heat pump shutdown (see power-OFF) Power-OFF
Bridged Bridged Start command (= activation on heating/cooling demand even
outside set switching times and on shutdown during automatic mode
(ECO-ABS); during heating or DHW operation with increase of set
temperatures according to settings of WP026 and WP027)
Start command
Contractor parameters Meaning Setting:
WP025 Smart Grid ON
WP026 Set heating temperature increase 0 ... 20 °C
WP027 Set DHW temperature increase 0 ... 40 °C
WP028 Heat generator activation OFF, HP, HP+elec.htg, elec. heater
WP032 Heating with SG/PV ON, OFF
WP033 Cooling with SG/PV ON, OFF