Setting The Operating Programs; Frost Protection Function; Heating And Cooling Curve Settings (Slope And Level) - Viessmann VITOCAL 300-G Technical Manual

Heat pump control unit
■ Automatic function for DHW heating and DHW circulation pump
■ Time, day and standard switching times for central heating, DHW
heating, heating a heating water buffer cylinder and the DHW circu-
lation pump are factory-set
■ Switching times are individually programmable; up to 8 time phases
per day

Setting the operating programs

The heating system frost protection (see frost protection function)
applies to all heating programs.
You can select the following operating programs with the program
selectors:
■ For heating/cooling circuits:
Heating and DHW or heating, cooling and DHW
■ For a separate cooling circuit:
Cooling
■ Only DHW; separate settings for each heating circuit
Note
If the heat pump is only required to operate for DHW heating, for
example in summer, select operating program "Only DHW" for all
heating circuits.
■ Standby mode

Frost protection function

■ The frost protection function will be started when the outside tem-
4
perature falls below approx. +1 °C.
With active frost protection, the heating circuit pump will be switched
on and the boiler water is maintained at a lower temperature of
approx. 20 °C.
The DHW cylinder will be heated to approx. 20 °C.
■ The frost protection function will be stopped when the outside tem-
perature rises above approx. +3 °C.

Heating and cooling curve settings (slope and level)

The Vitotronic 200 regulates the flow temperatures for the heating cir-
cuits and cooling circuit in weather-compensated mode:
■ System flow temperature or flow temperature of heating circuit with-
out mixer A1
■ Flow temperature heating circuit with mixer M1
■ Flow temperature of heating circuit with mixer M2 in conjunction with
the extension kit for one heating circuit with mixer
■ Flow temperature, separate cooling circuit
The flow temperature required to reach a specific room temperature
depends on the heating system and the thermal insulation of the build-
ing to be heated or cooled.
Adjusting the heating or cooling curves matches the flow temperatures
to these conditions.
VIESMANN
60
(cont.)
Shortest switching interval: 10 minutes
Power backup: 14 days
The external operating program changeover is possible in conjunction
with the external extension H1.
■ Heating curves:
The flow temperature of the secondary circuit is restricted at the
upper end of the scale by the temperature limiter and the tempera-
ture set at the electronic maximum temperature limiter.
Heating curve slope
90
80
70
60
50
40
30
20
20 10 0
Outside temperature in °C
1.4
1.2
1.0
0.8
0.6
0.4
0.2
-10 -20 -30
VITOCAL 300-G