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Settings
Installation manual – System controller
31
5
and 53 described in Paragraph 4.2
p. 28.
8� Only for the K18 Simplygas unit and alarm signal of the aux-
iliary boiler connected to the specific input of the K18 unit:
Generate an alarm of the auxiliary boiler (e.g. by pro-
voking a flame lock-out) and verify that the display of
the K18 unit shows the E495 error.
9� Select parameter 7202 (Commissioning heat pump) and
set it to Off.
When this operation is performed, the service request
to the K18 unit is cancelled and the auxiliary boiler is
switched off.
10� Only for K18 Simplygas units:
Access the connection terminal block of the auxiliary
boiler, identify the terminals of the ON/OFF request
and verify that the request from the K18 unit is deacti-
vated: open contact, and therefore, DC or AC voltage
between the terminals with value depending on the
model of the boiler.
11� Only in the case of the K18 Simplygas unit and interface to
the auxiliary boiler with the 0-10 V signal:
Access the connection terminal block of the auxiliary
boiler, identify the terminals of the 0-10 V signal and
verify the value of the DC voltage that must be ap-
proximately 0 V.
12� Only for the K18 Simplygas unit and alarm signal of the aux-
iliary boiler connected to the specific input of the K18 unit:
Follow the instructions in the manual of the auxiliary
boiler to restore its alarms and verify that the E495
error no longer appears on the display of the K18 unit.
13� Select parameter 7223 (Disable heat pump) and set it to
Inactive.
14� Access Menu 4 of the user interface of the K18 unit and re-
set parameters 50, 217 and 218, setting them to the values
noted in point 1 of the procedure.
4.4
SETTING THE SYSTEM TO STAND-BY
Once all checks have been completed, if you do not wish to op-
erate the system but simply ensure anti-icing protection, pro-
ceed as follows:
1� On the QAA75.611 room unit, access the Heating circuit 1
menu in the
End user
level, select parameter 700 (Operating
mode) and set it to Protection.
2� if a second heating circuit is present, access the Heating cir-
cuit 2 menu, select parameter 1000 (Operating mode) and
set it to Protection.
3� Press ESC twice to inlet to the start screen.
4� If DHW production is present, press the QAA75.611 room
unit's top left button to deactivate it; the hyphen shown at
the top left corner of the display under the water tap symbol
disappears.
5� Leave the system powered on and the gas line open.
If you do not wish to ensure anti-icing protection:
1� Run steps 1 - 4 above.
2� Make sure the K18 unit shuts down completely if the unit is
running, wait (10 minutes) for it to stop.
3� Leave the system powered off and the gas line closed.
5
SETTINGS
The System controller for the K18 is supplied preconfigured with
"moderate" settings, which enable basic heating and DHW ser-
vice (if present) automatically after commissioning.
However, for best results, it is often necessary to adjust certain
parameters to suit the characteristics of the building and the cir-
cuits, as well as the client's specific requirements.
This section contains instructions for satisfactory regulation.
Par. 5.1.7
p. 34 also gives information about the options
regarding the installation and use of the QAA75.611 and
QAA55.110 room units.
For further details, the full manual for the Siemens
RVS21.826 controller may be obtained. However, due to
the large number of possible controller adjustments, we
do not recommend making settings other than those
indicated in this document. For special requirements,
please contact the Robur Technical Support Centre.
5.1
OPTIMISING HEATING SERVICE
5.1.1
Heating circuit 1 (or zone 1)
This circuit (or zone) is preconfigured active with the main settings given in Table 5.1
p. 31.
Table 5�1
Heating circuit 1 (or zone 1) preconfiguration
Preconfiguration
Dependency on parameter
Operating mode
Automatic
(Comfort 6 – 22 Monday – Sunday)
700
Comfort setpoint
21 °C
710
Reduced setpoint
18 °C
712
Protection setpoint
7 °C
714
Heating curve slope
0.76
(water setpoint around 40 °C with external
temperature -10 °C)
720
Summer/winter heating limit
18 °C
730
Flow temp setpoint min
8 °C
740
Flow temp setpoint max
40 °C
741
Room influence
20%
750
Room temperature limitation
2.5 °C
760
To change the settings of Table 5.1
p. 31, access the
Engineer
menu level, and then the Heating circuit 1 menu; then select