Viessmann B2HF - Screed Drying

115
Reduced room temperature
+20 14 5
90
-20
D E
A
C
B
Fig. 60 Example 2: Adjusting the reduced set room
temperature from 5 °C to 14 °C
A
Flow temperature in °C
B
Outside temperature in °C
C
Set room temperature in °C
D
Heating circuit pump "OFF"
E
Heating circuit pump "ON"
Changing the reduced set room temperature
Operating instructions
Changing the slope and level
Individually adjustable for each heating circuit.
A
B
Boiler water or flow temperature in °C
90
+20 -20
Outside temperature in °C
3.5
1.4
0.2
Fig. 61
A
Changing the slope
B
Changing the level (vertical parallel offset of the
heating curve)
Raising the flow temperature of the heating cir-
cuits during operation with room temperature
hook-up
The higher the value, the greater the influence of the
room temperature on the flow temperature of the heat-
ing circuit.
Room influence factor parameter
Heating circuit Parameter
1 (without mixer) 933.7 (only set if just one
heating circuit is installed)
2 (with mixer) 934.7
3 (with mixer) 935.7
4
*2
(with mixer)
936.7
Example for determining the increase in the flow tem-
perature using the value of the heating curve when the
actual room temperature deviates from the set room
temperature:
■
Set room temperature = 20.0 °C (RT set)
■
Actual room temperature = 18.0 °C (RT actual)
■
Heating curve slope =1.4
■
Room influence factor = 8 (delivered condition)
Determining the increase in flow temperature
(RT set - RT actual) x (1 + slope) x room influence fac-
tor/4 = raising the flow temperature via heating curve
value
(20 - 18) x (1 + 1.4) x 8/4 = 9.6
Increase in flow temperature via heating curve value
= 9.6 K
Screed drying
When enabling screed drying, observe the information
provided by the screed manufacturer.
When screed drying is activated, the heating circuit
pumps of all heating circuits are switched on and the
flow temperature is maintained at the set profile. After
completion (30 days), the heating circuits with mixer
are automatically controlled with the set parameters.
*2
(only Vitodens 200-W, type B2HF with 7 inch screen)
Function description
Appliance functions (cont.)
5593201
Functions