Commissioning
32
4
Access Menu 4, with the password 1111.
Select parameter 49, take note of the set value
and then set it to 0 (excluded optional auxiliary
boiler for K18 Simplygas models and integrated
boiler module for K18 Hybrigas models).
2. If needed, access again to the complete parameter list
on the QAA74.611 room unit, proceeding as described
in Paragraph 4.1.1
3. Access Service/special operation menu.
4. Display and access the page containing parame-
ter 7223 (Disable heat pump), select it and set it to
Active.
5. Display and access the page containing parameter
7212 (Outp selection HP multistage), select it and
set it to Compressor 1.
6. Display and access the page containing parameter
7202 (Commissioning heat pump), select it and set
it to Heating mode.
When this operation is performed, the heat pump
of the K18 unit turns on after about 3 minutes;
complete the next steps 7-9 within a few minutes
after start-up.
7. Access the K18 unit's terminal block and check that
the DC voltage between the COM and REQ terminals
is around 0 V.
8. Also on the K18 unit terminal block, check the DC
voltage between the 0 and +10 terminals of the K18
CONTROL CABLE terminal block, located directly un-
der the COM terminal; it must be around 10.0 V.
9. Set parameter 7202 (Heat pump commissioning) to
Off.
This cancels the service request to the K18 unit.
Some of its components may continue to run for
a few minutes, as it runs its shutdown cycle. The
following steps can be run without waiting for the
unit to shut down completely.
10. Access the K18 unit's terminal block and check that
the DC voltage between the COM and REQ terminals
is around 15 V.
11. Also on the K18 unit terminal block, check the DC
voltage between the 0 and +10 terminals of the K18
CONTROL CABLE terminal block, located directly un-
der the COM terminal; it must be around 0 V.
12. Display and access the page containing parame-
ter 7223 (Disable heat pump), select it and set it to
Inactive.
13. If required, (always for K18 Hybrigas models, only in
the presence of the auxiliary boiler for K18 Simplygas
models), access Menu 4 of the user interface of the
K18 unit, select parameter 49 and reset it to the cor-
rect value, which was noted in step 1 of the procedure.
4.3.3
Checking the start and stop commands on
the auxiliary boiler (if present)
This Paragraph applies to all units type K18 Hybrigas, as
well as to those type K18 Simplygas if an auxiliary boiler
is present.
1. On the K18 unit's user interface, proceed as follows,
with reference to its
Installation, user and maintenance
manual
:
Access Menu 4, with the password 1111.
Select parameter 50, take note of the set value
and then set it to 3.
Select parameter 217, take note of the set value
and then set it to 10.0.
Select parameter 218, take note of the set value
and then set it to 10.0.
2. If needed, access again to the complete parameter list
on the QAA74.611 room unit, proceeding as described
in Paragraph 4.1.1
3. Access Service/special operation menu.
4. Display and access the page containing parame-
ter 7223 (Disable heat pump), select it and set it to
Active.
5. Display and access the page containing parameter
7212 (Outp selection HP multistage), select it and
set it to Compressor 1.
6. Display and access the page containing parameter
7202 (Commissioning heat pump), select it and set
it to Heating mode.
When this operation is performed, the integrated
boiler module of the K18 Hybrigas unit (or the aux-
iliary boiler of the K18 Simplygas unit) is started up;
complete the next steps 7-10 within a few min-
utes.
If the boiler does not start, verify that it is actu-
ally enabled to operate by actuating the relevant
control panel: with regards to the K18 Hybrigas
unit, consult its
Installation, use and maintenance
manual
and in the case of the K18 Simplygas unit,
the manual provided by the manufacturer of the
auxiliary boiler.
7. Only for K18 Simplygas units:
Access the connection terminal block of the aux-
iliary boiler, identify the terminals of the ON/OFF
request and verify the actual activation of the re-
quest from the K18 unit: closed contact, no voltage
between the terminals.
8. Only in the case of the K18 Simplygas unit and inter-
face to the auxiliary boiler with the 0-10 V signal:
Access the connection terminal block of the auxil-
iary boiler, identify the terminals of the 0-10 V sig-
nal and verify the value of the DC voltage; it must
correspond to that required by the boiler to obtain
a setpoint of 80.0 °C, according to the settings of
parameters 52 and 53 described in Paragraph
4.2
9. Only for the K18 Simplygas unit and alarm signal of the
auxiliary boiler connected to the specific input of the
K18 unit:
Generate an alarm of the auxiliary boiler (e.g. by
provoking a flame lock-out) and verify that the dis-
play of the K18 unit shows the E495 error.
10. Set parameter 7202 (Heat pump commissioning) to
