Riello KV/200 20 ISC Solar Installation And Maintenance Manual page 45

ADJUSTING THE GAS VALVE
- Switch on mains power to the boiler.
- Open the gas cock.
- Turn the function selector to OFF/RESET (the display
shows "- -").
- Unscrew the four screws (A) and remove the front trim (B).
- Press the combustion analysis button (CO).
- Wait for the burner to ignite. The display will read out
"CO" and the boiler will start functioning at maximum
central heating power. The chimney sweep function
remains active for a maximum time of 15 minutes. If the
central heating flow reaches a temperature of 85°C, the
burner shuts down. The burner will re-ignite when cen-
tral heating flow temperature drops below 75°C.
- Remove the cap and insert the combustion analysis
probe.
- Turn the HTG trimmer clockwise until maximum fan
speed is reached (see table).
- Check the CO content. If the value is not as speci-
2
fied in the table, adjust the gas valve maximum screw
accordingly.
- Turn the HTG trimmer anticlockwise until minimum
speed is reached (see table).
- Check the CO content. If the value is not as speci-
2
fied in the table, adjust the gas valve minimum screw
accordingly.
- Return the HTG trimmer to the correct Max CH setting
(see table).
- Turn the function selector to exit chimney sweep mode.
- Remove the combustion analysis probe and replace
the cap.
- Fit the front trim (B) and secure with the four screws (A).
The combustion analysis function stops automatically if
the control card detects an error condition. If an error
occurs during combustion analysis, proceed as follows
to perform a reset. Turn the function selector to "
then to " ", and then to the desired function.
{
Max. gas
power screw
Max. gas
power screw
20 ISC Solar
30 ISC Solar
20 ISC Solar
30 ISC Solar
20 ISC Solar
30 ISC Solar
20 ISC Solar
} ", and
30 ISC Solar
MAXIMUM FAN SPEED
METHANE PROPANE
(G20) (G31)
6.1 6.1
6.0 6.0
MINIMUM FAN SPEED
METHANE PROPANE
(G20) (G31)
1.3 1.3
1.6 1.6
MAX CO VALUES
2
METHANE (G20) PROPANE (G31)
9,0 10,0
9,0 10,0
MIN CO VALUES
2
METHANE (G20) PROPANE (G31)
9,5 10,0
9,5 10,0
TECHNICAL ASSISTANCE SERVICE
2 40 60 80
1 3 20 100
0 120
0 bar 4 °C
x 1000 rpm
x 1000 rpm
x 1000 rpm
x 1000 rpm
%
%
%
%
45