Room Temperature-Dependent Control - Viessmann VITOTRONIC 200 Service Instructions Manual

Heating circuits/cooling circuits
Room temperature hook-up
A room temperature sensor is required. The room tem-
perature sensor integrated into the remote control is
activated by parameter "Remote control 2003".
Room temperature hook-up is enabled via "Room
temperature hook-up 200B".

Room temperature-dependent control

The heat pump control unit determines the set flow
temperature from the difference between the set room
temperature ("Standard room temperature 2000" or
"Reduced room temperature 2001") and the actual
room temperature. Room temperature-dependent con-
trol can be switched on with "Room temperature con-
trol 2005".
Heating limit and cooling limit
The heat pump operates either in heating mode or
cooling mode. Simultaneous central heating and cen-
tral cooling via different heating/cooling circuits is not
possible.
Central heating is only enabled if the adjusted outside
temperature ("Interval for long term average outside
temperature 7002") drops below the cooling limit. For
central cooling, the adjusted outside temperature must
exceed the cooling limit.
Heating limit
The heating limit results from the set room temperature
less "Temperature differential for calculating the
heating limit 7003".
Changeover between central heating and central cooling
Depending on the system configuration, the heat pump
control unit switches either manually or automatically
between central heating and central cooling.
Manual switching
Only for system with heating water/coolant buffer cylin-
der and max. 3 heating/cooling circuits (system config-
uration on page 49)
2
To switch between central heating and central cooling,
the mode of the heating water/coolant buffer cylinder
must be switched manually ("Buffer cyl operating
mode 721F").
(cont.)
The following parameters are used to set the level of
influence on the set flow temperature.
■ Central heating via heating/cooling circuit:
"Influence room temperature hook-up 200A"
■ Central cooling via heating/cooling circuit, connected
to heating water/coolant buffer cylinder:
"Influence room temperature hook-up cooling
circuit 2034"
■ Central cooling via heating/cooling circuit without
buffer cylinder/with heating water buffer cylinder or
via separate cooling circuit:
"Influence room temperature hook-up cooling
circuit 7104"
1 room temperature sensor is required. The room tem-
perature sensor integrated into the remote control is
activated by parameter "Remote control 2003".
Cooling limit
The cooling limit results from the set room temperature
plus "Temperature differential for calculating the
cooling limit 7004".
Automatic switching
Only with one of the following system configurations:
1 heating/cooling circuit without mixer, without buffer
■
cylinder
■ 1 separate cooling circuit
■ System with heating water buffer cylinder and max.
3 heating circuits (system configuration
page 49)
Heat pump with installation kit with mixer and system
■
with max. 2 heating circuits (system configuration
on page 49)
Function description
on
1
3
51