Commissioning
Installation manual – System controller
31
4
you to quickly identify most problems with the electrical
hookup and system anomalies; we strongly recommend
running them.
4.3.1
Testing the inputs and outputs
1. If needed, access again to the complete parameter list,
proceeding as described in Paragraph 4.1.1
2. Access the Input/output test menu and select param-
eter 7700 (Relay test).
3. Set it to QX5 relay output (QX5 relay output, function
Q2 -> heating circuit 1 pump) and check that the heat-
ing circuit 1 pump runs (or the zone 1 valve opens).
4. If heating circuit 1 is mixed type:
Set the parameter to QX1 relay output (QX1 relay
output, function Y1 -> open mixing valve on sys-
tem outlet line) and check that the mixing valve
responds as desired.
Set the parameter to Relay output QX2 (QX2 relay
output, function Y2 -> open mixing valve on heat-
ing circuit 1 inlet line) and check that the mixing
valve responds as desired.
5. If heating circuit 2 (or zone 2) is present:
Set the parameter to QX3 relay output (QX3 relay
output, function Q6 -> heating circuit 2 pump) and
check that the heating circuit 2 pump runs (or the
zone 2 valve opens).
6. If the DHW function managed by the K18 unit is pres-
ent (EVO models):
Set the parameter to QX4 relay output (QX4 relay
output, function Q3 -> set DHW diverter valve to
DHW service) and check that the diverter valve re-
sponds as desired.
7. Set parameter to No test.
8. Display the page containing parameter 7804 (Sensor
temp BX1) and check its value (BX1 probe, function B9
-> Outdoor temperature).
9. If the DHW function managed by the K18 unit is pres-
ent (EVO models):
Display the page containing parameter 7806
(Sensor temp BX3) and check its value (BX3 probe,
function B3 -> DHW buffer tank temperature).
10. If heating circuit 1 is mixed type:
Display the page containing parameter 7807
(Sensor temp BX4) and check its value (sensor
BX4, function B1 -> Heating circuit 1 outlet tem-
perature).
To facilitate checking the connection of each tem-
perature probe to its input, you can take them out
of their mounts one at a time and heat them up
slightly; observe the variation of the readings on
the display to check that they are hooked up to
the right inputs. Make sure you have restored each
sensor to its own mounting afterwards.
11. If an external request has been installed for heat-
ing circuit 1 (or zone 1), e.g. a thermostat or a
chronothermostat:
Display the page containing parameter 7844
(Input signal H1) and, by activating the external
request, check the correct switching between the
Open state to Closed state and vice versa.
NOTE: If no external request is present, this test
must indicate Closed state, due to the jumper in-
stalled at the factory.
12. If heating circuit 2 (or zone 2) is present, and an exter-
nal request has been installed:
Display the page containing parameter 7858
(Input signal H3) and, by activating the external
request, check the correct switching between the
Open state to Closed state and vice versa.
NOTE: If no external request is present, this test
must indicate Closed state, due to the jumper
added during installation.
13. Display and access the page containing parameter
7700 (Relay test), select it and set it to Everything off.
14. Display and access the page containing parameter
7724 (Output test UX3), select it and set it to 50%.
15. Access the terminal block of the K18 unit (refer to
Figure 3.10
Check that the DC voltage between the COM and
DHW terminals is around 17 V.
Check that DC voltage between the 0 and +10
terminals of the K18 CONTROL CABLE terminals
group is 5 V.
Check that the DC voltage between the COM and
RES terminals is around 8,5 V.
16. Display and access the page containing parameter
7700 (Relay test), select it and set it to Relay output
QX4.
17. Install a temporary jumper between the EXTERN
RESET terminals on the CSK18 enclosure terminal
block.
18. Access the terminal block of the K18 unit (refer to
Figure 3.10
Check the voltage between the COM and DHW ter-
minals again: it should now be around 0 V.
Check the voltage between the COM and RES ter-
minals again: it should now be around 0 V.
19. Set parameter 7700 (Relay test) to No test.
20. Display and access the page containing parameter
7724 (Output test UX3), select it and set it to --% (test
disabled).
21. Select Back field to return back to the page shown in
Figure 4.4
22. Remove the temporary jumper between the EXTERN
RESET terminals on the CSK18 enclosure terminal
block.
4.3.2
Checking the start and stop commands on
the heat pump
The System controller for K18 is shipped preconfigured
with heating circuit 1 and DHW production (if present)
already activated.
The K18 unit may therefore start up from the first time the
system is powered on and start and stop during the tests
described in Paragraph 4.3.1
1. On the K18 unit's user interface, proceed as follows,
with reference to its
Installation, user and maintenance
manual
:
