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points so that the heating output and room temperature can
be adjusted as required.
A steeper adjustment curve gradient means that the
temperature of the supply water changes more when the
outdoor temperature decreases. In other words, if the room
temperature is wrong when the outdoor temperature is low
but not when the outdoor temperature is high, the gradient
of the curve needs to be changed.
Increasing the setting:
Decreasing the setting:
The end user can make minor changes to the adjustment
curve during the first heating period. See the operating
manual for instructions on this.
Outdoor temperature values:
Y1 = -30°C
Y2 = -15°C
Y3 = 0°C
Y4 = 10°C
Y5 = 20°C
Supply water temperature (°C)
Outdoor temperature (°C)
Set value supply water
You should set permitted supply water limits for the
heating circuits. The supply water set values are cut at the
v1-1 12082021
Increases the temperature
of the supply water, par-
ticularly at low outdoor
temperatures.
Decreases the tempera-
ture of the supply water,
particularly at high out-
door temperatures.
minimum and maximum set values, even if the heating
graph were to exceed the set point.
If you use underfloor heating to heat wet rooms, please
note the minimum temperature increase when setting the
lower limit.
Upper limit:
Maximum supply water temperature
Set point values:
Underfloor heating 40–45°C
Radiator heating 50–65°C
Lower limit:
Minimum supply water temperature
Set point values:
Underfloor heating 18–25°C
Radiator heating 15–18°C
Summer/winter heating limit
The summer/winter heating threshold switches the heating
on or off according to outdoor temperature conditions.
When heating is set to AUTO, this cross-connection
functions automatically, and the user does not need to
switch the heating on or off. The annual periods can be
shortened or extended by adjusting the set values.
NOTE: If the system has heating areas that should not be
stopped in the summer (humid areas), the setting for the
circuit in question should be changed to a continuous
WINTER state.
MAIN MENU > HEATING CIRCUIT 1 (2) >
SUMMER/WINTER HEATING LIMIT
Factory setting 16°C
12.4 Modbus communication
The Modbus communication connection (MODBUS350)
enables the device's temperatures, status information,
setpoint s and malfunctions to be read by a higher-level
automation system. With a Modbus350 connection, a
setpoint can be specified for the temperature at which the
heat pump will output heat to the accumulator or heating
network. The Modbus connection requires an optional
cellular data card. The cellular data card is specific to the
controller.
Modbus Description
The master-slave protocol means that one master device
and one slave device are connected to the same bus at the
same time. The master always begins data transfer. Slave
devices do not communicate with each other, nor do they
send requests or other messages to the master device
unless the master specifically requests this. In a precise
transmission, the master first sends a request to one
particular slave device and waits for a response. The slave
device has a unique address between 1 and 247.
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