Riello Start Aqua Condens 25/60 BIS, Installer And User Manual

Page: 39 / 76

ENGLISH
39
E - Adjusting the heating temperature with
an external probe connected
When an external probe is installed, the delivery temperature is auto-
matically selected by the system, which quickly adjusts the ambient
temperature according to variations in the outside temperature. If you
want to alter the temperature value (increasing or reducing the value
automatically calculated by the electronic card), use the heating water
temperature selector: turn it clockwise to increase the temperature, or
anticlockwise to reduce it.
The correction possibility is between 15° C and 25° C of comfort (0 =
20° C), shown on the digital display by rotating the knob.
F - Adjusting the domestic hot water
temperature
To adjust the domestic water temperature (bathrooms, showers,
kitchen, etc.), turn the knob with the symbol
:
- Clockwise to increase the value,
- anticlockwise to decrease the value (mi. value 37°C - max. value
60 °C).
- +
The boiler is in standby until the burner switches on following a heat
request.
The boiler will be in function until the heat request is reached, after-
wards it will be in “standby” again.
G - Temporary switch-off
In the event of a temporary absence, weekends, short journeys and
so on:
- Turn the mode selector to OFF.
In this way (leaving the electricity and fuel supplies enabled), the
boiler is protected by the following systems:
Antifreeze
when the temperature of the water in the boiler drops below 5°C the
circulator starts and, if necessary, the burner at minimum output to
being the water temperature to safety values (35°C). During the anti-
freeze cycle, the symbol
appears on the digital display.
Circulator anti-blocking
an operation cycle is activated every 24 h.
H - Switching off for lengthy periods
If the boiler is not used for a long period, carry out the following op-
erations:
- Turn the mode selector to
OFF
- Turn the main system switch to “OFF”.
- Close the fuel and water taps of the heating and domestic hot wa-
ter system
In this case, the anti-freeze and anti-blocking systems are de-
activated. Drain the heating and domestic water system if there
is any risk of freezing.
The Riello Technical Assistance Centre is at your disposal if
you have any problems carrying out this procedure.
I - Display and fault codes
The operating status of the boiler is shown on the digital display,
below is a list of the types of displays.
BOILER STATUS DISPLAY
TYPE OF
ALARM
Off status (OFF) OFF None
Stand-by - Signal
ACF alarm lockout module
A01
Definitive
lockout
ACF electronics fault alarm
Limit thermostat alarm
A02
Definitive
lockout
Tacho fan alarm
A03
Definitive
lockout
Water pressure switch alarm
A04
Definitive
lockout
NTC domestic water fault
A06
Signal
NTC heating outlet fault
A07
Temporary
stop
Heating outlet probe
over-temperature Temporary
then definitive
Outlet/return line probe
differential alarm Definitive
lockout
NTC heating return line fault
A08
Temporary
stop
Heating return line probe
over-temperature Temporary
then definitive
Outlet/return line probe
differential alarm Definitive
lockout
Cleaning the primary
heat exchanger
A09
Signal
NTC flue gases fault
Flue gases probe over-
temperature Definitive
lockout
Parasite flame
A11
Temporary
stop
Low temperature system
thermostat alarm
A77
Temporary
stop
Temporary pending ignition 80
°C
flashing
Temporary
stop
Water pressure switch
intervention
flashing
Temporary
stop