Ignition Procedure; Display Symbols; Technical Area Access - Ariston NIMBUS 40 M EXT Technical Instructions

WARNING
To guarantee safety and correct operation of the system in-
terface, it must be commissioned by a qualified technician in
possession of the skills as required by law.

Ignition procedure

- Insert the system interface into the connection shoe by push-
ing it gently downwards; after a brief initialisation, the system
interface will be connected;
- The display screen shows "Select language". Turn the knob
and select the desired language. Press the OK button to con-
firm.
- The display shows the date and time.
Use the knob to select the date, press the OK button, turn the
knob to select the exact day, press the OK button to confirm
and move on to the month, followed by the year, pressing the
OK button to confirm after each step.
Turn the knob to select the time, press the OK button, turn the
knob to select the exact hour, press the OK button to confirm
and move on to the minute value. Press the OK button to con-
firm.
Turn the knob and select summer time, press the OK button,
select auto or manual, press the OK button.
The display screen shows:
- Country selection
Now follow the step-by-step instructions which appear on the
display from time to time.

Technical Area access

- Simultaneously press the back "
code" appears on the display.
- Turn the knob to enter the technical code (234) then press OK;
TECHNICAL AREA will appear on the display:
- Language, date and time
- BUS network setting
- Complete menu
- Guided configuration
- Maintenance
- Errors
Turn the knob and select:
- COMPLETE MENU (for a full list of the parameters, please see the
table below)
Press the OK button. Turn the knob and select:
12 HYBRID EVO 2 PARAM
Press the OK button. Turn the knob and select:
12.0 User parameters
Press the OK button. Turn the knob and select:
12.0.0 Hybrid mode
Press the OK button. Turn the knob and select:
- 0. Auto
(automatic operating mode)
- 1. Boiler only
(excludes heat pump operation)
- 2. Heat pump only
(excludes boiler operation)
Press the OK button.
Turn the knob and select:
12.0.1 Energy Manager logic
Press the OK button. Turn the knob and select:
- Max economy (the system operates for maximum saving)
- Max ecology (the system operates for maximum environmental re-
spect)
Press the OK button. Turn the knob and select:
12.0.2 ECO/COMFORT
Press the OK button.
Defines the operating time of the boiler starting from the highest energy
saving (ECO PLUS) to the most comfortable (COMFORT PLUS)
Press the OK button. Turn the knob and select:
" and "OK" buttons until "Enter
12.0.3 AUTO function
Press the OK button.
Activate/deactivate the thermoregulation function.
12.0 4 Silent operation mode activation
Press the OK button. Turn the knob and select:
- ON (reduces heat pump noise)
- OFF (switches off heat pump)
Press the OK button.
12.0.5 Quiet Mode start time [hh:mm]
Press the OK button. Turn the knob to set the modality start time. The
compressor frequency is limited to the 75% of the maximum power.
Press the OK button.
12.0.6 Quiet Mode end time [hh:mm]
Press the OK button. Turn the knob to se time of the modality deactiva-
tion. Press the OK button
12.0.7 PV integration
Press the OK button. Turn the knob and select:
- Not active
- Active (by applying a 230 VAC signal to the PV input, the system fa-
vours the use of the heat pump during a heating or DHW request, to
exploit the energy produced by the photovoltaic system. If there are
no requests, it heats the DHW storage tank by increasing the set-point
by the delta set in parameter 12.0.8). Press the OK button.
Press the OK button. Turn the knob and select:
12.08 PV Delta T DHW setpoint temp.
Press the OK button. Turn the knob to set the value that encreases the
sanitary setpoint when the PV contact is supplied.
Press the OK button. Turn the knob and select:
12.1 INPUT OUTPUT CONFIGURATION
Press the OK button. Turn the knob and select:
12.1.0 HV Input 1 (input configurable to 230 V)
Press the OK button. Turn the knob and select:
- Not defined: no function associated to the input. Fault 941 is displayed.
- Absent: Input not enabled.
- EDF (night tariff):I nput not active (0V).
When a 230 VAC signal is applied to the input, the system applies the
reduced electricity rate defined by parameter 12.9.5
- SG Ready 1: input signal nr 1 for the SG Ready standard
- External Switch OFF signal: input signal to set the the machine OFF.
Every heat request, cooling request and DHW service is stopped and
antifreeze protection logics are active.
Press the OK button. Turn the knob and select:
12.1.1 HV Input 2 (input configurable to 230 V)
- Not defined: no function associated to the input. Fault 942 is dis-
played.
- Absent: Input not enabled.
- DLSG (DO NOT USE)
- SG Ready 2: input signal nr 2 for the SG Ready standard
Press the OK button. Turn the knob and select:
12.1.2 HV IN 3 (input configurable to 230 V)
Select the operating mode through parameter 12.1.2. Photovoltaic inte-
gration: the contacts must be connected to the relevant outlet of the
electrical power meter of the photovoltaic system.
Closing the contact produces the following effects:
- Not active: no function associated with the input.
- PV Integration Active: the heat pump will always be regarded as the
preferential generator for the heating function.
The boiler will only activate if the power of the heat pump becomes
insufficient.
(only for systems with cylinder for the production of domestic hot water
the cylinder temperature setting is raised by the value de fined in pa-
rameter 12.0.8, so that the DHW cylinder can be used as a thermal sto-
rage tank for the excess energy produced by the photovoltaic system).
Press the OK button. Turn the knob and select:
12.1.3 AUX Input 1
- None
- Humidistat sensor: when the contact is closed, the heat pump is
turned off during the cooling cycle.
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