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Instructions for the installer
-
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.
Tighten the maximum adjustment screw "A"
in a clockwise direction until you arrive to
the abutting end, than slacken for 3 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.
INJECTORS – PRESSURES
ALKON 90
Type of
Supply
Gas
p r e s s u r e
in wc (kPa)
A (Natural)
7 (1,74)
E (Propan HD)
11 (2,74)
A (Natural)
7 (1,74)
E (Propan HD)
11 (2,74)
38
MINIMUM OUTPUT
ADJUSTMENT
SCREW
CO
level
CO
level
Fan speed
2
2
(%)
(%)
min
max
m i n
(FL)
9.0
9.1
25
10.5
10.5
25
FOR HIGH ALTITUDE
9.0
9.1
25
10.5
10.5
25
C) COMPLETION OF THE BASIC ADJUSTMENTS
-
Check the C0
outlet
-
If necessary make the required adjustments
To ensure correct operation the C0
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.
In case of replacement of the gas valve or ignition difficulty:
Check the C0
Ø Mixer
Minimum gas
max
injectors
consumption
Øin (mm)
ft
3
/hr (m
(FH)
0.082 (2,33)
0.35 (9,0)
94
0.032 (0,90)
0.22 (5,6)
92
0.35 (9,0)
0.082 (2,33)
85
0.032 (0,90)
0.22 (5,6)
84
values at the minimum and maximum
2
levels often, especially at low flow rate
2
Maximum gas
Start
output %
consumption
3
/hr)
ft
3
/hr (m
3
/hr)
0.336 (9,52)
0.130 (3.68)
0.303 (8,57)
0.117 (3,31)
values
2
V max
fun
IG
FU
45
12
45
12
45
12
45
12
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