Heating and cooling curve settings (slope and level)
The Vitotronic 200 regulates the flow temperatures for the heating/
cooling circuits in weather-compensated mode:
■ System flow temperature or flow temperature for heating circuit
without mixer A1/HC1
■ Flow temperature for heating circuit with mixer M2/HC2:
Control unit directly controls the mixer motor
■ Flow temperature, heating circuit with mixer M3/HC3:
Control of the mixer motor via the KM-BUS
■ Flow temperature when cooling via heating/cooling circuit. The
separate cooling circuit is controlled in room temperature-depend-
ent mode.
The flow temperature required to reach a specific room temperature
depends on the heating system and the thermal insulation of the
building to be heated or cooled.
Adjusting the heating or cooling curves matches the flow tempera-
ture to these conditions.
■ Heating curves:
The flow temperature of the secondary circuit is restricted at the
upper end of the scale by the temperature limiter and the maxi-
mum temperature set at the heat pump control unit.
3.2
3.4
Flow
temperature
in °C
Outside temperature in °C
Heating curve slope
3.0 2.8
2.2
2.4
2.0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
90
80
70
60
50
40
30
20
1.8
2.6
10
20
-30
-20
-10
0
■ Cooling curves:
The flow temperature of the secondary circuit is restricted at the
lower end of the scale by the minimum temperature set at the heat
pump control unit.
1.2
30
25
20
35
Outside temperature in °C
Flow
temperature
in °C
1
5
10
15
20
1.4 1.6
1.0
0.8
0.6
0.4
0.2
1.8 2.0 2.2
3.4
3.0
2.6
Cooling curve slope
Heating systems with heating water buffer cylinder
When using hydraulic separation, a temperature sensor must be
integrated in the heating water buffer cylinder. This temperature sen-
sor is connected to the heat pump control unit.
Outside temperature sensor
Installation location:
■ North or north-west facing wall of the building
■ 2 to 2.5 m above the ground, for multi storey buildings in the upper
half of the second floor
Connection:
■ 2-core lead, length up to 35 m with a cross-section of 1.5 mm
2
(copper)
■ Never route this lead immediately next to 230 V/400 V cables.
41
66
80
Heat pump control unit
(cont.)
VITOCAL
VIESMANN
133
5831388
8
