71
Cooling/heating circuit settings for contractors
20.0 °C
Day standard room temperature:
16.0 °C
Night standard room temperature:
2.0
Factor set room curve/heating curve change
20.0 °C
2.0 °C
Factor set room curve/heating curve change:
Set value:
24.0 °C
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Heating circuit 1
17:03:59
12.08.13
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System
Heating curve
Cooling curve
Night
45.0
42.0
35.0
22.0
-8.0
0.0
7.0
20.0
50.0
24.0
Day
45.0
42.0
35.0
22.0
0.0
18.0
40.0
19.0
19.0
20.0
OT
32.0 °C
°K
°C
°C
Set value
Night setback
Minimum limit
Maximum limit
2
1
7
8
3
4
5
6
Fig.58
1
/
2
Flow temperatures for reduced mode (setback
mode)
3
/
4
Flow temperatures for standard mode
5
/
6
Outside temperatures
7
Maximum flow temperature
8
Minimum flow temperature
Example:
This example uses the heating curve values from the
screenshot.
Assuming
the outside temperature is
7 °C, then the flow temperature will be regulated to
35 °C. If the outside temperature is 3.5 °C, the flow
temperature will be regulated to 38.5 °C.
The heating circuits in this system can be used for sev-
eral rooms; regulation in the rooms is independent of
this controller. This controller therefore does not have
any room temperature sensors.
Note
In order to provide clearer control, room temperatures
are calculated even though there are no room temper-
ature sensors.
The heating curve temperatures correspond to the flow
temperature of the heating circuit. The standard room
temperature, the adjustment factor and the user-
adjustable set temperature are constants.
During commissioning the standard temperatures and
the adjustment factor need to be set by the contractor.
The user-adjustable set room temperature for day and
night affects the flow temperature of the heating cir-
cuits as described below:
Formula
■
(Set room temperature - standard room temperature)
* heating curve adjustment factor
Example:
■
Set room temperature = 24 °C, day standard room
temperature = 20 °C
■
A factor of 2 gives a correction value of 8 K
■
This figure of 8 K is added to the flow temperature
that is calculated from the heating curve.
Note
Important information on adjusting the standard
room temperature and factor:
The shift of the heating curve due to the room temper-
ature constants limits the control range. Excessive cor-
rection results in the heating system running constantly
at minimum or maximum. In this scenario the outside
temperature has no effect on control.
Correct adjustment of heating curve and set tem-
perature constants
The heating curve is optimally adjusted if the standard
room temperature results from the heating curve
alone. Consequently, the temperature correction factor
must be
0
when adjusting the heating curves. In addi-
tion, in the detailed heating circuit view, the set room
temperature must be set to a value which is identical to
the standard room temperature.
The standard room temperature is the average set or
required room temperature.
Commissioning, inspection, maintenance
Commissioning the system
(cont.)
5549 991 GB
Summary of Contents for 301.BS090
Page 99: ...99 5549 991 GB...
