Riello START AQUA 24 BI Installer And User Manual page 8

START AQUA 24 BI
At the end of the checks:
- Set the function selector to the required mode.
- Adjust the selectors as required by the client.
The boiler is supplied to operate with natural gas (G20) or LPG
(G30/G31). It has been factory set as specified on the technical
data plate and therefore does not require any calibration opera-
tions.
All checks and inspections must be carried out exclusively by
the Technical Assistance Service.
4.4 Display and faults
BOILER STATUS
OFF status
Stand-by
ACF module block alarm
ACF electronics fault alarm
Limit thermostat alarm
Water pressure switch alarm
Boiler NTC fault
Heating NTC fault
Heating delivery sensor
over-temperature
Delivery/return sensor
differential alarm
Parasite flame
Transitory awaiting ignition
Water pressure switch trip
Service calibration
Installer calibration
External sensor detected
DHW request
Heating request
Anti-freeze heat request
Flame detected
To restore operation (unblock alarms):
Faults A01-02-03
Set the function selector to OFF
the required setting.
If the unblock attempts do not reactivate the boiler, please request
support from the Technical Assistance Service.
Fault A04
The digital display shows the fault code together with the symbol
Check the pressure shown on the water gauge:
if the pressure is less than 0.3 bar, set the function selector to
(OFF) and adjust the filling valve until the pressure is between 1 and
1.5 bar. Turn the function selector back to the required setting.
8
Hole for flue analysis
tester
DISPLAY ALARM TYPE
OFF None
- Warning
Permanent block
A01
Permanent block
A02
Permanent block
A04
Warning
A06
Temporary stop
Temporary then
permanent
A07
Permanent block
Temporary stop
A11
80°C
Temporary stop
(flashing)
Temporary stop
(flashing)
Warning
ADJ
Warning
Warning
60°C
Warning
80°C
Warning
Warning
, wait 5-6 seconds and return to
If there are frequent drops in pressure, please request support from
the Technical Assistance Service.
Fault A06
The boiler operates normally but does not guarantee a stable domes-
tic hot water temperature, which is set to around 50°C.
Please request support from the Technical Assistance Service.
Fault A07
Please request support from the Technical Assistance Service.
4.5 Temporary shutdown
During temporary absences, weekends, short holidays etc., set the
function selector to (OFF).
During temporary absences (weekends, short holidays etc.), set the
function selector to (OFF-unblock).
With the power mains ON and the gas supply active, the boiler is
protected by the systems:
- Anti-freeze: This function is activated if the boiler water tempera-
ture falls below 5°C. The pump runs a 15 minute cycle every 2
hours as follows: the pump stops when the boiler water tempera-
ture exceeds 10°C; the burner is ignited to the minimum in heating
mode when the boiler water temperature falls below 5°C until the
water temperature reaches 30°C, after which a post-pump phase
runs for 30 seconds.
- The boiler water temperature is also checked (via the sen-
sor). When the temperature reading falls below 5°C a request
is activated for operation in DHW mode at the minimum setting
(pump+burner), which continues until the boiler water temperature
reading rises above 10°C.
- Pump anti-block function: the pump is activated every 24 hours
of standby and, in any event, 3 hours after the last DHW demand.
4.6 Shutdown for long periods
If the boiler will not be used for a long period of time, you must:
- set the function selector to
- turn the main system switch OFF.
- close the heating and domestic hot water system gas and water
cocks.
In this case, the anti-freeze and pump anti-block functions are
disabled.
Empty the heating and DHW circuit if there is a risk of freezing.
.
(OFF).