Heating, general
6 720 802 419 (2012/06) en
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4Heating, general
The heating system consists of one or more circuits; these may also have
a cooling function (option). The heating system is installed according to
operating mode, depending on access to and type of addition. Settings
for this are made by the installer
4.1 Circuits for heating
• Circuit 1; the first circuit is included by default in the control unit and
is controlled by the installed flow sensor, possibly in combination with
an installed room sensor.
• Circuit 2 (mixed); control of circuit 2 is also included by default in the
control unit and only needs to be supplemented with a mixing valve,
circulation pump and flow sensor and possibly with an additional
room sensor.
• Circuits 3-4 (mixed); control of up to 2 additional circuits is optional.
Each circuit is then fitted with a Multi module, mixing valve, circulation
pump, flow sensor and possibly a room sensor.
4.2 Control methods for heating
• Outdoor sensor; a sensor is fitted on the outside wall of the house.
The sensor sends signals to the control unit in the heat pump. Control
with an outdoor sensor means that the heat pump automatically
regulates the heating in the house depending on the outdoor
temperature. The customer determines the temperature of the
heating system in relation to the outdoor temperature by setting the
current room temperature in the control unit.
• Outdoor sensor and room sensors (one room sensor per circuit is
possible); Control with outdoor sensor supplemented with room
sensor(s) means that one (or several) sensors are mounted in a
central location inside the house. They are connected to the heat
pump and provide the control unit with information about the current
room temperature. The signal affects the flow temperature. For
example, it falls when the room sensor indicates a higher temperature
than the one set. Room sensors are used when factors other than the
outdoor temperature influence the indoor temperature of the house.
For example, this can be when a stove or fan-assisted radiator is used
in the house, or if the house is sensitive to the wind or exposed to
direct sunlight.
4.3 Time control for heating
• Program control; the control unit offers four fixed and two individual
programs for clock setting of day/time.
• Holiday; the control unit has a program for holiday mode, which
means that during the selected period the room temperature changes
to a lower or higher level. The program also allows switching off hot
water production.
• External control; the control unit can make settings for external
control, which means that the preselected function is performed
when the control unit senses an input signal.
4.4 Operating modes
• With electrical additional heat; the heat pump is dimensioned less
than the house peak heating load and electrical additional heat is
permitted to cut in at the same time as the heat pump to meet the
demand, when the heat pump cannot meet it itself. Alarm mode, Extra
hot water and Hot water peak, and if the heat pump is off at low
outdoor temperatures, the addition is also activated.
• With mixed additional heat (option); mixed additional heat which is
permitted to work at the same time as heat pump. The additional heat
is also used during alarm operation.
A hot water electric heater is required for production of extra hot
water and hot water peak. In this case, the electric additional heat in
the heat pump is disabled.
Circuits 2 through 4 cannot have a higher flow
temperature than circuit 1. This means that underfloor
heating on circuit 1 cannot be combined with radiators
on another circuit. Room temperature reduction for
circuit 1 can affect other circuits in some cases.
It is only the room where the room sensor is located that
can influence regulation of the temperature for the
relevant heating circuit.
The Multi module accessory is required for mixed
additional heat and hot water electric heater.
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