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Unical ALKON 70 kW Instruction Manual Page 51

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51
Instructions for the installer
ALKON 50
20
37
1,02 m³/h
0,75 kg/h
5,13 m³/h
3,76 kg/h
48,5-9,6
48,5-9,6
-
-
9,5
11,0
95
92
26
24
5,6
5,6
-
-
9,5
11,0
40
45
FL e FH = parameter
ALKON 70
20
37
1,02 m³/h
0,75 kg/h
7,14 m³/h
5,24 kg/h
67,5-9,6
67,5-9,6
-
-
9,5
11,0
99
90
20
20
9,0
9,0
-
-
9,5
11,0
50
60
C) COMPLETION OF THE BASIC ADJUSTMENTS
- Check the C0
2
values at the minimum and maximum
outlet
- If necessary make the required adjustments
To ensure correct 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
terminal with the appropriate cap C.
MINIMUM OUTPUT
ADJUSTMENT
SCREW (B)
Tighten the maximum adjustment screw “A”
in a clockwise direction until you arrive to
the abutting end, than slacken for 7 turns.
Verify the boiler ignition; if the boiler goes
into lockout slacken the screw “A” again of
one turn, than retry the ignition. If the boiler
goes into lockout again, carry out the above
indicated operations until the boiler is
lighted.
At this point carry out the burner adjustment
as previously indicated.
- 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.
INJECTORS – PRESSURES
Nat. Gas (G20)
LPG (G31)
Nat. Gas (G20)
LPG (G31)
Gas Type
Supply
pressure
(mbar)
Min.
gas
consump-
tion
Collector
Diaphragm
(Ø and n°
holes )
Heat
input
(kW)
Mixer
injectors
(Ø mm)
Flue outlet
diaphragm
(Ø mm)
Fan
speed
%
FL (min) FH (max)
C0
2
levels
(%)
min
Start
out-
put
%
C0
2
levels
(%)
max
Max
gas
consump-
tion
Gas Type
Supply
pressure
(mbar)
Min.
gas
consump-
tion
Collector
Diaphragm
(Ø and n°
holes )
Heat
input
(kW)
Mixer
injectors
(Ø mm)
Flue outlet
diaphragm
(Ø mm)
Fan
speed
%
FL (min) FH (max)
C0
2
levels
(%)
min
Start
out-
put
%
C0
2
levels
(%)
max
Max
gas
consump-
tion
Check the C0
2
levels often, especially at low flow rate
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