Ariston NIMBUS 40 M EXT Technical Instructions page 86

Press the OK button. Turn the knob and select:
12.1.4 AUX Output 1 (AFR)
- None
- Fault alarm: the contact is closed in case of a system error
- Humidistat alarm: the contact is closed when the AUX1 input is set as
a humidistat and the contact is closed
- External heat request: the contact is closed to generate a heating
request towards an external source
- Cooling request: the contact is closed to generate a cooling request
towards an external source.
- DHW request: the contact closes to generate the request by an exter-
nal source to heat the domestic hot water cylinder ("FLEX" models").
Press the OK button. Turn the knob and select:
12.1.5 AUX Output 2 (like the OUT AUX 1 output)
Press the OK button. Turn the knob and select:
12.1.6 AUX P2 circulator setting
- Auxiliary circulator: the circulator follows the direction of the external
unit's primary circulator.
- Cooling circulator: the circulator is active when the cooling mode is
selected and the request is active.
- Buffer circulator: the circulator is active when a global heating request
is present and the buffer activation is set to ON.
Press the OK button. Turn the knob and select:
12.2 ENERGY MANAGER PARAMETER 1
Press the OK button. Turn the knob and select:
12.2.0 Hydraulic scheme
Press OK. Turn the knob and select the corresponding hydraulic dia-
gram when using an instant boiler or a boiler with storage tank.
If the hydraulic diagram is not defined, the system displays error 940
"define the hydraulic diagram".
12.2.1 FlowT HP Offset
Defines compensation in °C of the delivery temperature setpoint of the
heat pump, due to thermal dispersion along hydraulic connections be-
tween heat pump and hydraulic module.
Press the OK button. Turn the knob and select:
12.2.2 Text for Boiler disabling
The system excludes the boiler when the outdoor temperature is higher
than the value set.
Press the OK button. Turn the knob and select:
12.2.3 Text for HP disabling
The system excludes the heat pump when the outdoor temperature is
higher than the value set.
Press the OK button. Turn the knob and select:
12.2.4 External temperature correction
Compensation of the temperature reading of the external sensor
Press the OK button. Turn the knob and select:
12.2.5 Pro-Tech anode active
Configures the function of the AFR output with the following values:
- OFF (Protech anode not present)
- ON (Protech anode present)
Press the OK button. Turn the knob and select:
12.2.6 EM Antiblocking Function Enable
Activates the anti-lock function of the primary circulator.
The circulator is activated for 30 sec every 23 hours of inactivity and the
diverter valve is positioned on DHW.
Press the OK button. Turn the knob and select:
12.3 CENTRAL HEATING
Press the OK button. Turn the knob and select:
12.3.0 CH pump prerun time
Defines the pre-circulation time of the primary circulator to detect the
presence of flow in the heating circuit
12.3.1 Time for prerun new attempt
Defines the stand-by time of the circulator between successive precir-
culation attempts.
12.3.2 CH Pump Overrun
Post-circulation time
12.3.3 Pump Speed Control
Set the speed level of the circulator:
- 0. Low Speed
- 1. High Speed
86 /
- 2. Modulating
12.3.4 Delta T Pump Setpoint
Adjust the circulator's modulation to between 5°C and 20°C
12.3.7 Max PWM Pump
Maximum circulator speed
12.3.8 Min PWM Pump
Minimum circulator speed
12.3.9 Floor drying Flow Set Point T
Defines the set-point temperature of the heating delivery during the
screed drying function performed manually (see parameter 12.8.1).
Press the OK button. Turn the knob and select:
12.4 COOLING
Press the OK button. Turn the knob and select:
12.4.0 Cooling mode activation
Press the OK button. Turn the knob and select:
- Not active
- Active (enables the function)
12.4.1 Cooling anticycling time
Define the delay time for the end of cooling request and heat pump
switching off.
12.4.2 Cooling FlowT HP Offset
Define the flow setpoint temperature compensation due to heat losses
along the hydraulic connection between the outdoor unit and the inter-
nal hydraulic module. See param. 12.2.3.
Press the OK button. Turn the knob and select:
12.5 DOMESTIC HOT WATER
Press the OK button. Turn the knob and select:
12.5.2 Comfort Function
Configures the domestic hot water production mode as follows:
- Disabled
- Time based (starts the comfort function for periods which can be set
through the domestic water production schedule programming featu-
re)
- Always Active
12.5.3 Tank charge mode
Press the OK button. Turn the knob and select:
- 0. Standard
- 1. Only HP
- 2. Fast
Press the OK button. Turn the knob and select:
12.5.4 Thermal Cleance Function
Activating this function, the sanitary water tank is heatted up at 60°C for
1h every 30 dasy .
- ON (enable function)
- OFF
12.5.5 Thermal Cleance start time [hh:mm]
Define the start time of the thermal cleanse function
12.5.6 Thermal Cleance frequency
Set the period after wich a new Thermal Cleanse is performd
12.5.7 DHW delay timer
Time required to start the calculation of the DHW integration with
the boiler.
12.5.8 Soglia DHW Release Integral
Activation threshold for DHW integration with the boiler in
STANDARD mode, expressed in °C x min.
Push OK button. Turn the knob and select:
12.6 MANUAL MODE - 1
Manual activation of the system components (circulators, diverter valve,
resistors, etc)
Push OK button. Turn the knob and select:
12.7 MANUAL MODE - 2
Allows for manually activating the heat pump.
Press the OK button. Turn the knob and select:
12.7.0 Manual mode activation
Turn the knob and select:
12.7.1 Rating Heating Mode
Activate the heat pump in heating mode at fixed frequency set by the