Riello Start Aqua Condens 25/60 BIS Installer And User Manual page 31

- Move the housing base forwards and then upwards to unhook it
from the frame
- Turn the instrument panel forward
- Undo by two turns the screw of the pressure test point upstream
from the gas valve and connect the pressure gauge
Pressure test
point
upstream of
the valve
- Power the boiler electrically by setting the main system switch
to "ON"
- Bring the mode selector to summer
- Turn the DHW temperature selector to maximum. Make sure that
the water in the storage tank is not at temperature
- Fully open the hot water tap
- With the burner at maximum output, check that the gas pressure
is comprised between the minimum and rated power supply
pressure values indicated in the table
- Turn off the hot water tap
- Disconnect the pressure gauge and tighten the pressure test
point screw again upstream from the gas valve.
Combustion check
To carry out the combustion analysis, proceed as follows:
- turn the mode selector to
- turn the DHW adjustment selector to the combustion analysis
mode position
- wait for the burner to fire (approx. 6 seconds). "ACO" is displayed
and the boiler operates at the maximum heating output
- remove the screw and the cover on the air distribution box (see
image below)
- insert the flue gas analysis probe into the sockets provided on
the air box
- check that the CO values correspond to those indicated in the
2
"Technical data" table, if the value displayed is different, modify
as indicated in chapter "Gas valve calibration"
- perform the combustion check.
Then:
- remove the analyser probe and close the combustion analysis
sockets with the screw.
9
The flue gas analysis probe should be inserted until its
reaches the stop.
9
Even during the combustion analysis phase, the function that
switches the boiler off when the water temperature reaches
the maximum limit (about 90°C) remains enabled.
When the checks are completed:
- position the mode selector depending on the operating mode
desired
- adjust the selectors according to the client's requirements.
9
The boiler is supplied for use with methane gas (G20) and are
already factory set as specified on the rating plate, so do not
require any calibration.
9
All checks must be carried out exclusively by the Technical
Assistance Centre.
ENGLISH
to turn off the boiler
screw
cover
31