System Requirements - Daikin Altherma 3 WS EWSAH06UD 9W Series Installer's Reference Manual

10 | LAN adapter
"Recommended ON" mode
"Forced OFF" mode
"Forced ON" mode

10.5.3 System requirements

Installer reference guide
134
In the "Recommended ON" operation mode, the heat pump system makes use of
solar/grid power (when it is available, as measured by the solar inverter/energy
management system) to produce domestic hot water and/or heat up or cool down
the space. The amount of solar/grid power that is used for buffering depends on
the domestic hot water tank and/or the room temperature. To align solar/grid
capacity and the power consumption by the heat pump system, the power
consumption of the indoor unit is limited either statically (by a fixed value set in the
configuration web interface) or dynamically (auto-adaptively, as measured by the
electricity meter – if part of the system layout).
In the "Forced OFF" operation mode, the solar inverter/energy management
system triggers the system to deactivate the operation of the unit's compressor
and the electrical heaters. This is especially useful in case of energy management
systems that react to high energy tariffs, or in case of grid overload (signaled by the
energy distributor to the energy management system). Once active, "Forced OFF"
mode will cause the system to stop space heating/cooling, as well as domestic hot
water production.
INFORMATION
Once running in one of the Smart Grid operation modes, the system will keep
running in that mode until the input state of the LAN adapter is changed. Beware
that if the system runs in "Forced OFF" mode for a long time, comfort issues can
occur.
In the "Forced ON" operation mode, the heat pump system makes use of solar/grid
power (when it is available, as measured by the solar inverter/energy management
system) to produce domestic hot water and/or heat up or cool down the space.
The amount of solar/grid power that is used for buffering depends on the domestic
hot water tank and/or the room temperature. In contrast to the "Recommended
ON" operation mode, there is NO power limitation: the system selects the comfort
setpoint for space heating/cooling, and will heat up the domestic hot water tank to
the maximum temperature. The unit's compressor and the electrical heaters are
not limited in their power consumption.
The "Forced ON" operation mode is particularly useful in case of energy
management systems that react to low energy tariffs, in case of grid overload
(signaled by the energy distributor to the energy management system), or when
multiple houses are connected to the grid that are controlled simultaneously, this
to stabilise the grid.
INFORMATION
Once running in one of the Smart Grid operation modes, the system will keep
running in that mode until the input state of the LAN adapter is changed.
The Smart Grid application poses the following requirements to the heat pump
system:
EWSAH/X06UD
Daikin Altherma 3 WS
4P675765-1 – 2022.04