Unical ALKON 24 B 60 - Page 35

35
Instructions for the installer
Nat. gas (G20)
LPG (G31)
Nat. gas (G20)
LPG (G31)
C) COMPLETION OF THE BASIC
ADJUSTMENTS
- Check the C0
2
values at the minimum and maximum output.
- If necessary make the required adjustments.
To ensure correct boiler operation the C0
2
values have to be adjusted with extreme care
respecting the values indicated in the table.
- Close the sampling test point in the flue inlet/outlet termi-
nal with the appropriate cap C.
MINIMUM OUTPUT
ADJUSTMENT SCREWS
- If necessary correct the value by turning the adjustment screw
“B” in a CLOCKWISE direction to increase the value and in
an ANTICLOCKWISE direction in order to decrease it.
Check the C0
2
levels often, especially at low output
INJECTORS – PRESSURES
Fan
speed
(rpm)
Gas type Supply
pressure
(mbar)
Min gas
consum-
ption
Max gas
con-
sum-
ption
Collector
Diaphragm
(Ø and n.
holes )
Mixer
injector
(Ø mm)
Flue outlet
diaphragm
(Ø mm)
CO2
levels (%)
min
max
min
max
Start-up
firing rate
%
ALKON 24 B60 - Burner type “A” see page 39
9,0
10,2
7000
7000
20
37
0,45 m³/h
0,33 kg/h
2,52 m³/h
1,85 kg/h
1400
1500
8,6 x 9
9 x 6
9,0
10,8
5,6
5,6
-
-
10
20
ALKON 35 B60 - Burner type “A” see page 39
9,0
10,0
6700
6400
20
37
0,58 m³/h
0,43 kg/h
3,65 m³/h
2,68 kg/h
1200
1200
-
-
9,0
10,2
5,6
5,6
-
-
40
40
ALKON 24 B60 - Burner type “U” see page 39
9,0
10,2
7000
7000
20
37
0,45 m³/h
0,33 kg/h
2,52 m³/h
1,85 kg/h
1700
1600
8,6 x 8
8,6 x 8
9,0
10,5
5,6
5,6
-
26
5
5
ALKON 35 B60 - Burner type “U” see page 39
9,0
10,4
6800
6800
20
37
0,58 m³/h
0,43 kg/h
3,65 m³/h
2,68 kg/h
1400
1400
-
9,6 x 10
9,1
10,7
5,6
5,6
34
34
50
5
Nat. gas (G20)
LPG (G31)
Nat. gas (G20)
LPG (G31)
In case of gas valve replacement or difficult
ignition:
Screw down completely the maximum
adjustment screw “A“ in a clockwise
direction, than slacken for 7 turns.
Check the boiler ignition; if the boiler goes
into lockout slacken the screw “A“ again of
one turn, than retry ignition. If the boiler goes
into lockout again, carry out the above
indicated operations until the boiler is fired.
At this point carry out the burner adjustment
as previously indicated.