Settings
Installation manual – System controller
37
5
temperature acquired by the sensor, but a value which
has passed an inertial filter. This accounts for the ther-
mal inertia of the building, thus damping the variation of
the outlet setpoint in relation to changes in the outdoor
temperature.
The filter is preconfigured to a value of 10 hours, which is
suitable for a vast range of buildings with moderate ther-
mal inertia.
To modify this setting, proceed as follows:
1. If needed, follow instructions in Paragraph 4.1.1 p. 28
to access the complete parameter list, then access
Configuration menu.
2. Display and access the page containing parameter
6110 (Time constant building), select it and set it to
desired value:
0 h
Filter disabled (not recommended)
< 10 h
Building with low thermal inertia
10-20 h Building with average thermal inertia
> 20 h
Building with high thermal inertia
5.1.7
Choice of installation and use of room
units
The system is supplied with a QAA74.611 room unit. The
room unit is preconfigured as Room unit 1 to acquire the
room temperature in a reference heated room served by
heating circuit 1, and to influence the regulation of this
circuit accordingly and, if present, also that of heating
circuit 2 (as described in Paragraph 5.1.5 p. 36). This
setting is suited to the following type of installation:
Case 1
▶
The included room unit is actually installed in a refer-
ence heated room.
▶
Heating circuit 2 is not present or, if so, no dedicated
room unit will be installed.
▶
If both heating circuits are present: the reference
room, served by heating circuit 1, is at least partly also
representative of the rooms served by circuit 2.
You can adjust the parameters described in
Paragraph 5.1.5
p. 36, differentiating the settings
for the two circuits, to the point even of disabling
one or both of the room unit influence functions
for heating circuit 2, which does not directly serve
the reference room.
If, on the other hand, the situation is as follows:
Case 2
▶
The included room unit is not installed in a reference
heated room, for example, it is in the machine room.
In this case, you must configure the room unit so as not
to provide the room temperature value to the system.
Proceed as follows:
1. If needed, follow instructions in Paragraph 4.1.1 p. 28
to access the complete parameter list, then access
Operator unit menu.
2. Display and access the page containing parameter 40
(Used as), select it and set it to Operator unit 1.
3. Access Configuration menu.
4. Display and access the page containing parameter
6200 (Save sensors), select it and set it to Yes.
The value of parameter 6200 which displays at the
end of the configuration procedure will still be no;
this is normal (this setting executes an action, i.e.
memorization of the actually installed sensors).
Finally, in the following situation:
Case 3
▶
Both heating circuits are present.
▶
A second room unit dedicated to heating circuit 2 is
present.
In this case, you must configure the first room unit, in-
stalled in a reference room served by circuit 1, so that it is
dedicated to that circuit. Proceed as follows, working on
the first room unit:
1. If needed, follow instructions in Paragraph 4.1.1 p. 28
to access the complete parameter list, then access
Operator unit menu.
2. Display and access the page containing parameter 40
(Used as), select it and set it to Room unit 1.
3. Display and access the page containing parameter
47 (Room values device 1), select it and set it to For
zone 1 only.
4. Display and access the page containing parameter 48
(Warmer/cooler device 1), select it and set it to For
zone 1 only.
You must now configure the second room unit, installed
in a reference room served by heating circuit 2. Proceed as
follows, depending on the type of room unit:
Second room unit type QAA74.611
Proceed as follows, working on the second room
unit:
If needed, follow instructions in Paragraph
4.1.1
p. 28 to access the complete parameter list,
then access Operator unit menu.
Display and access the page containing parameter
40 (Used as), select it and set it to Room unit 2.
Second room unit type QAA55.110
Proceed as follows, working on the second room
unit:
Press the occupancy button
for at least 3
seconds, until the display reads ru = 1, ru = 2 or ru
= 3.
Turn the knob to set the parameter to ru = 2.
Wait for the text ru = 2 to clear from the display.
Now, on the first room unit, proceed as follows:
5. If needed, follow instructions in Paragraph 4.1.1 p. 28
to access the complete parameter list, then access
Configuration menu.
6. Display and access the page containing parameter
6200 (Save sensors), select it and set it to Yes.
The value of parameter 6200 which displays at the
end of the configuration procedure will still be no;
this is normal (this setting executes an action, i.e.
memorization of the actually installed sensors).
