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• by modifying the value of parameter P68.
• by performing "Restore factory settings" with parameter b29=10 (after performing this step, switch the power supply off and on again for about ten seconds).
In each of the above-mentioned cases, b27 automatically switches to 5.
The calibration procedure [Auto Setup] must be run in the following cases:
• after replacing the electronic board
• after changing the gas (b03)
• setting parameter P67 to 1
• after changing the value of parameter P68
• after setting parameter b27 to 5 for the replacement of components, such as the electrode, burner, gas valve, fan or for installations with maximum flue resist-
ance
• when the fault conditions A01, A06 have occurred or in other faults where it is requested ("Boiler fault codes" on page 74). Respect the sequence of the fault
remedies).
The calibration procedure [Auto Setup] resets the previously recorded combustion parameters and must only be performed in the cases described above.
11.2.6 Boiler test mode [Test]
Perform a heating or DHW request.
1. Enter the main menu [MENU ] with the
password 1234 >test menu mode [Test]. Confirm with the
2. After ignition, the power adjusts to medium power "med". When the combustion value is stable, "med ok"
is displayed (point
a
).
3. You can vary the power on 4 levels with the SW1 and SW2 buttons: min (minimum power), med (medium
power), max CH (maximum power CH) and max (maximum power DHW) (point
4. You can adjust the CO
with the SW6 and SW7 buttons only when the step value to the set power is fol-
2
lowed by "ok" (med ok, min ok, etc.). The "Offset" value will increase by one unit when the SW6 button is
pressed (point
b
). The Offset value will change by 3 units when the SW6 and SW7 buttons are pressed for
more than 2 sec., (Offset can only adjusted to the steps: max, med and min). When the power value is fol-
lowed by "ok", the combustion value will be saved.
5. The "Offset" has an adjustment range from -8 to +8. If the value is increased, the CO
value is decreased, the CO
will increase.
2
The CO
must not be adjusted with less than 500 hours of burner operation because the system self-adjusts.
2
To exit the mode, just press the
button.
If Test mode [Test] is enabled and there is a DHW request, which activates DHW mode, the boiler remains in Test mode [Test] but the 3-way valve is positioned in
DHW.
The Test mode [Test], however, is automatically disabled after 15 minutes or by closing the DHW request (if a DHW request resulted in activating DHW mode).
11.3 Final check before turning on the unit
For the correct functioning of the system it is mandatory to make the correct settings that depend on the type on the system served by the unit.
When the installation is complete and all the necessary settings have been made, reassemble and close all the panels of the unit.
11.4 Turn on the unit
When power is supplied to the unit, the controller display needs around 10 seconds for the activation (initialization phase). During this process the user interface cannot
be used. To activate the system, refer to "8. user interface" on page 47.
11.5 System delivery water setpoint setting
There must be a request for the unit to operate in heating or cooling mode.
The request can be made:
•
by setting the desired operating mode and putting the system in ON from the display (if parameter 6.31 Room Thermostat = 0, i.e. without thermostat) and
•
by setting the desired operating mode and the closure of one of the digital inputs H-L1-C (if parameter 6.31 Room Thermostat ≠ 0, i.e. with thermostat).
For details, see "User terminal block connections" on page 42.
11.5.1 Heating mode
The heating setpoint (T1Sh) can be modified by the user between 25 and 65°C via the display (see "8.4 DHW and system set point configuration" on page 49).
The maximum hot water temperature sent to the system before the system is switched off varies depending on whether the heat pump is operating (on its own or in
integration with the boiler) or only the boiler.
Heat pump operation (on its own or in integration with the boiler):
Twoutmax (when the heat pump switches off) = minimum value between T1Sstop and T1Sh+dT1Sh where:
•
T1stop=maximum temperature allowed to not operate outside he operating limits (see "3.3 Heat pump operational limits" on page 20)
•
dT1Sh parameter which can be set under heat pump service menu (see "9.2.2 Heat pump service menu" on page 59).
68
EN
button. Follow the installer menu path [Service] >enter the
button.
a
).
Cod. 3542B250 - Rev. 00 - 02/2022
OMNIA S HYBRID C 3.2
will decease; if the
2
fig. 45 -
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