Temperature Differential For Calculating The Cooling Limit - Viessmann VITOTRONIC 200 Service Instructions Manual

Parameter group System definition
7003 Temperature differential for calculating...
20°C
18°C
C
2K
16°C
D E
Fig. 52
Set room temperature
A
B Adjusted outside temperature (long term average)
Set value "Temperature differential for calculat-
C
ing the heating limit"
Heating mode OFF
D
Heating mode ON
E

7004 Temperature differential for calculating the cooling limit

Cooling limit:
Set room temperature plus "Temperature differential
for calculating the cooling limit 7004".
Central cooling starts automatically if the adjusted out-
side temperature (long term average, averaging inter-
val in the delivered condition 3 h) exceeds the cooling
limit. The operating program "Heating/cooling and
DHW" must be active.
Example:
Set room temperature = 20 °C
"Temperature differential for calculating the cool-
ing limit 7004" = 4 K
This results in a cooling limit of 24 °C (20 °C + 4 K).
■ Adjusted outside temperature > 24 °C (cooling limit):
Central cooling starts.
Adjusted outside temperature < 23 °C (due to speci-
■
fied hysteresis of 1 K):
Central cooling is stopped.
7007 Primary pump for natural cooling
Primary pump switching state if natural cooling is ON.
This setting depends on the installed system compo-
nents.
198
A
B
D
t
!
(cont.)
≙
Setting 1 0.1 K
!
Note
The cooling limit has no effect on a separate cooling
circuit.
This parameter is only available if cooling mode was
enabled by means of parameter "Cooling function
7100".
≙
Setting 1 0.1 K
Value Meaning
"0" The primary pump will not start in the case
where heat is being transferred via another
system component, such as a heating coil.
Pumps that may be required can be switched
via the NC signal (contact 211.5 on the main
PCB).
"1" Primary pump starts if heat is being transfer-
red via the primary circuit, for example.