Additional Information - Baxi Nuvola 3 Comfort Operating And Installation Instructions

• "AMBON" Enable/disable the Ambient Probe of the climate controller (factory setting 1). A value of 1 indicates that the ambient probe
is enabled while a value of 0 indicates that it is disabled (factory setting 1). In these conditions the temperature control in the rooms
depends on the chosen boiler delivery temperature ("CH SL"). If the climate controller is installed in the boiler, the function must be
excluded.
Press the keys +/-
to change this value.
NOTE:
see the table summarising the possible combinations between AMBON and MODUL.
• "MODUL" Enable/disable modulation of the delivery temperature as a function of the ambient temperature (with Ambient Probe
enabled) and of the external temperature (if an external probe is present). Factory setting 1. A value of 1 indicates that the modula-
tion of the delivery set point is enabled, while a value of 0 indicates that it is disabled.
Press the keys +/-
to change this value.
NOTE:
see the table summarising the possible combinations between AMBON and MODUL.
Table summarising the combination of the AMBON and MODUL functions
AMBON MODUL
1 1
0 1
0 0
1 0
• "HW PR" Enables the DHW programmer (0-1-2). Factory setting = 1.
• 0: Disabled
• 1: Always enabled
• 2: Enabled with weekly DHW programme ("HW PR" see section 3.7)
• "NOFR" Enable/disable Boiler Antifreeze function (factory setting 1). A value of 1 indicates that the ambient antifreeze function
is enabled, while a value of 0 indicates that it is disabled.
ATTENTION:
always leave this function enabled (1).
• "COOL" Enable/Disable control of ambient temperature in summer (factory setting=0). Set this parameter to 1 to enable the function and add
two new boiler operating modes, as per section 3.2:
SUMMER – OFF - WINTER – HEATING ONLY - SUMMER+COOL - COOL
To enable the function press button
This function is used to enable the climate controller to command one or more external conditioning devices (e.g.:
air-conditioners) in summer. The boiler relay board therefore enables the external conditioning system when ambient temperature exceeds the
temperature value set on the climate controller. During an operating request in this mode
see the SERVICE instructions.
See Service Instruction.
INSTRUCTIONS FOR FITTERS
BUTTON FUNCTIONS +/-
Regulation of the ambient temperature (modulating delivery temperature)
With external probe : Regulation of KREG curves
Without external probe : Regulation of calculated delivery temperature .
(it is advisable to set MODUL = 0)
Regulation of delivery temperature setpoint .
Regulation of the ambient temperature (fixed delivery temperature)
repeatedly until the display is shows

20.2 ADDITIONAL INFORMATION

26
to the right of the time.
flashes on the display. For relay board connections,
C607215 - GB