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Viessmann Vitotronic 200 - WO1C Manual

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Note
Above a specified outside temperature, the buffer cyl-
inder will no longer be heated, even in the "Fixd
value" operating status. Your contractor can adjust
this temperature limit.
Setting the time program for central cooling with buffer cylinder
In the time program for central cooling with buffer cylin-
der, you set the time phases in which your buffer cylin-
der is cooled and to what temperatures. In addition,
you specify whether the entire volume of the buffer cyl-
inder or just the top section is cooled.
When setting the time program, you select an operat-
ing status for each time phase: See chapter "Operating
status for cooling the buffer cylinder".
Note
This time program applies only to a heating water/cool-
ant buffer cylinder in cooling mode.
Factory setting: One time phase from 00:00 to 24:00 h
for every day of the week with the "Standard" operat-
ing status
■The time phases for cooling the buffer cylinder must
cover all time phases for central cooling (for all heat-
ing/cooling circuits).
■If you switch off heating of the heating water buffer
cylinder with the time program (all time phases are
deleted "- - : - -"), your rooms will not be heated.
■We recommend that the buffer cylinder should be
cooled continuously.
1. Extended menu:
2. "System"
3. "Time prog. coolnt buff cyl."
4. Set the required time phases and operating status.
To see how to set a time program: See page 23.
Note
■The buffer cylinder is not cooled between the time
phases. Only frost protection for the buffer cylinder is
active.
■When setting the time program, please bear in mind
that your heat pump requires some time to cool the
buffer cylinder to the required temperature.
Operating status for cooling the buffer cylinder
"Standard"
■The entire volume in the buffer cylinder is cooled to
the lowest set flow temperature for all connected
heating/cooling circuits.
■The set flow temperature of a heating/cooling circuit
results from the cooling curve, the outside tempera-
ture and the required room temperature.
"Reduced"
■The top section of the buffer cylinder is cooled to the
lowest set flow temperature for all connected heat-
ing/cooling circuits.
■The set flow temperature of a heating/cooling circuit
results from the cooling curve, the outside tempera-
ture and the required room temperature.
"Fixd value"
■The entire volume in the buffer cylinder is cooled to a
fixed temperature.
Factory setting: 20 °C
Your contractor may have adjusted this value.
■You can utilise the "Fixd value" operating status,
e.g. to cool the buffer cylinder to a lower temperature
with economical night tariff power.
Setting the heating curve/cooling curve
So that your rooms are heated or cooled optimally at
all outside temperatures, you can adjust the "Level"
and "Slope" of the "Heating curve" or the "Cooling
curve". This allows you to influence the flow tempera-
ture provided by the heat pump.
Note
Further information on setting the "Heating curve" or
"Cooling curve" can be found in chapter "Terminol-
ogy" in the Appendix: See page 92.
Central heating/central cooling
Central heating/central cooling with buffer… (cont.)
5817913
… 29 …


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