Worcester 11 KW, User Manual

Page: 12 / 28

SETTINGS
6 720 802 172 (2012/06) 12
Each circuit is controlled by its own heat curve. The installer sets the
type of heating for each circuit, that is
Radiator or Underfloor . The heat
curve for Underfloor has lower values because the floors do not tolerate
such high temperatures.
Fig. 22 Radiator
The figure indicates the factory setting curve for a radiator circuit. At -
2.5 °C the flow set point is 37.4 °C.
Fig. 23 Floor
The figure indicates the factory setting curve for an underfloor circuit. At
-2.5 °C the flow set point is 27.2 °C.
Setting of heat curve
A heat curve is set for each circuit. If the room temperature is perceived
to be too high or too low in the circuit, it is preferable to adjust the curve.
The curve can be changed in different ways. The slope of the curve can
be changed by offsetting the flow temperature upwards or downwards
on the left-hand side (the value at outdoor temperature 20 °C, factory
value 22.0 °C) as well as the right-hand side (the value at outdoor
temperature -35 °C, factory setting 60.0 °C). In addition, the curve can
be affected by every 5th outdoor temperature degree.
The value at 0 °C is displayed above the curve's left-hand point, factory
value 35.7 °C.
Fig. 24 Settings window Heat curve (radiator)
Change the left point:
▶ Press the menu dial when the square is highlighted.
The value is then highlighted.
Fig. 25
▶ Turn the menu dial to change the value. Press the dial to save or use
to return without saving.
In the window, the square is highlighted again and any changed values
are displayed after the square. In addition, the curve is updated
according to the new value.
Change the right point:
▶ Turn the menu dial when the square is highlighted. The upper square
is changed to outdoor temperature with the corresponding curve
value after the colon. The circle marks the relevant curve position.
▶ Continue to turn the dial until it shows a square before the colon.
▶ Press the dial to highlight the value.
Fig. 26
▶ Turn the menu dial to change the value. Press the dial to save or use
to return without saving.
In the window, the square is highlighted again and any changed values
are displayed after the square. In addition, the curve is updated
according to the new value.
Change a specific value, for example the value at an outdoor
temperature of 0 °C:
▶ Turn the menu dial when the square is highlighted until 0 °C is marked
(

Fig. 27).
▶ Press the dial to highlight the value.
If the heat curve has been set too high, the display will
show the message
Too high heat curve setting .
▶ Change the heat curve setting.
6 720 614 789-15.3I
T1(˚C)
T2(˚C)
20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35
80
70
60
50
40
30
20
10
6 720 614 789-16.3I
T1(˚C)
T2(˚C)
20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35
80
70
60
50
40
30
20
10
6 720 614 789-18.3I
6 720 614 789-19.3I
6 720 614 789-23.3I