Worcester 6 KW Instruction Manual page 46

SETTINGS
At a temperature higher than 20 °C, the same curve value applies as for
20 °C.
The right point of the curve (-35 °C) can be changed in
Minimum outdoor temperature ( Chapter 20.1).
Set value applies for all heat curves.
A change of the right point affects the flow temperature
for all outdoor temperatures that are lower than the set
temperature.
>> Highest permitted flow temperature T1
Factory setting
Lowest value
Highest value
Table 60 Radiator
Factory setting
Lowest value
Highest value
Table 61 Underfloor
1)
The value that is set in Lowest permitted flow temperature T1.
>> Lowest permitted flow temperature T1
Factory setting
Lowest value
Highest value
Table 62 Radiator
Factory setting
Lowest value
Highest value
Table 63 Underfloor
▶ Set the highest and lowest permitted temperature for T1. Ensure that
the value corresponds with the selected curve and possible curve
adjustments.
▶ Check also that the highest temperature T1 with Underfloor does not
exceed the permitted value for the type of floor used.
>> Heat curve
The settings are the same as for Circuit 1.
>> Room sensor (room controller)
The settings are the same as for Circuit 1.
>> Room temperature program
The settings are the same as for Circuit 1, except that Copy to all
heating circuits is not included.
>> Regulator settings
The mixing valve is controlled with PID regulator in order to reach the
flow set point value when there is a need. The signal determines how
much the opening of the mixing valve should change. It is calculated with
short time intervals.
>> Regulator settings
>>> P constant
Factory setting
Lowest value
Highest value
Table 64 P constant
46
>>> I constant
Factory setting
Lowest value
Highest value
Table 65 I constant
>>> D constant
Factory setting
Lowest value
Highest value
80.0 °C
Table 66 D constant
1)
>>> Minimum PID signal
100.0 °C
Factory setting
Lowest value
45.0 °C
Highest value
1)
Table 67 Minimum PID signal
45.0 °C
>>> Maximum PID signal
Factory setting
Lowest value
Highest value
10.0 °C
Table 68 Maximum PID signal
10.0 °C
>>> Mixing valve running time
80.0 °C
Factory setting
Table 69 Mixing valve running time
10.0 °C
▶ Set the run time that is indicated on the mixing valve and indicate
10.0 °C
45.0 °C
>>> Mixing valve fully closed
Factory setting
Lowest value
Highest value
Table 70 Mixing valve fully closed
▶ Set how many K ( °C) below the maximum permitted flow temperature
>>> Mixing valve start closing
Factory setting
Lowest value
Highest value
1.0 Table 71 Start closing mixing valve
0.1
▶ Set how many K ( °C) below the value for fully closed mixing valve the
30.0
value in number of minutes.
If there is no time indication on the mixing valve, run it
manually ( Chapter 20.7) and measure how long it
takes to go from fully closed to a fully open mixing valve
(the mixing valve stops sounding and the endposition
switch switches off).
T1 the mixing valve is to be fully closed. The maximum flow
temperature is different depending on the type of heating system
(radiator or underfloor). With an underfloor system, the mixing valve
should be fully closed at 45 °C-2K=43 °C (with factory settings).
closure of the mixing valve should begin. The result is 43 °C-2K=41 °C
(with the factory settings for underfloor heating).
300.0
5.0
600.0
0.0
0.0
10.0
0%
0%
100%
100%
0%
100%
300s / 05:00
2.0K
1.0K
10.0K
2.0K
1.0K
10.0K
6 720 806 768 (2013/02)