Viessmann VITOTRONIC 300 Operating Instructions Manual page 51

Scanning options under "Information"
Solar energy
"Solar energy history"
"Collector temp"
"Solar DHW"
"Solar circuit pump" (hours run)
"Solar energy"
"Solar circuit pump" (ON/OFF)
or
"Solar pump circ speed"
"Heating suppr. DHW"
"SM1 output 22" (ON/OFF)
"SM1 output 22" (hours run)
"Sensor 7"
"Sensor 10"
"Heating suppr. heating"
Terminology
Setback mode (reduced heating mode)
See "Reduced heating mode".
Operating program
You define the following with the operating program:
■ Central heating and DHW heating
or
DHW only, no central heating
■
or
■ Only frost protection for the boiler and the DHW cyl-
inder is active.
No central heating, no DHW heating
Note
No operating program is available for central heating
without DHW heating. When you want central heating,
hot water is generally also required (winter mode).
Operating status
In the operating program "Heating and DHW", the
operating status changes from "Standard heating
mode" to "Reduced heating mode" and vice versa. The
times at which the operating status is changed over
are defined by you when setting the time program.
Extension kit for heating circuit with mixer
Assembly (accessories) for controlling a heating circuit
with mixer, see "Mixers"
(cont.)
Screed drying
Your heating contractor can activate this function for
screed drying, for example in your new build or exten-
sion. This means your screed is dried in line with a
fixed time program (temperature/time profile) that is
appropriate for the building materials used.
The screed drying function affects heating circuits with
mixer:
All rooms are heated according to the temperature/
■
time profile.
Your settings for central heating have no effect for
the duration of screed drying (max. 32 days).
■ DHW heating is carried out (but priority control is
cancelled).
Underfloor heating
Underfloor heating systems are slow, low temperature
heating systems and respond only very slowly to short
term temperature changes.
Therefore, heating to the reduced room temperature at
night or activating "Economy mode" during short
absences does not result in significant energy savings.
Heating mode
Standard heating mode
For periods when you will be at home during the day,
heat your rooms to the standard room temperature.
Set the periods (time phases) using the time program
for central heating.
Appendix
51