Unical ALKON 50 c, Installation And Servicing Manual

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30
In case of gas valve replacement or difficult
ignition:
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 the CO2 percentage is too low, check if the air
and smoke ducts are not obstructed.
Check the levels of CO2 often, especially with low flow rates. They refer to the boiler with a closed combustion chamber.
NOZZLES - PRESSURE - FLOw RATES TABLE
3) Conclusion of the basic calibrations
- once the CO
2
values at minimum and maximum output
have been checked and any adjustments have been made
(sections 1-2):
- disable the timed “calibration” function by switching off the
main
switch.
For proper operation, the CO
2
values must be
calibrated with particular attention, observing
the values indicated in the table.
- close the flue gas inspection sample points of the intake and
exhaust terminal
-
check that there are no gas leaks.
If they are not obstructed, check if the burner and/or the
exchanger (aluminium sections) are well cleaned.
ALKON 50 c (Adjusted for 34,8)
Type of
Gas
Supply
Press..
Ø
Nozzles
Collector
diaphragm
Fan
speed
CO
2
levels Start-up
power.
[mbar] (mm) [Ø/mm] min max [%] [%]
FL
[rpm]
FH
[rpm] min max
IG
Nat gas (G20) 20 5,6 - 26 1550 71 4230 9,5 9,1 40
Nat gas (G25) 25 7,0 - 26 1550 71 4230 9,5 9,1 50
Propane (G31) 37 5,6 - 24 1460 67 4000 11,0 11,0 45
ALKON 50 c
Type of
Gas
Supply
Press..
Ø
Nozzles
Collector
diaphragm
Fan
speed
CO
2
levels Start-up
power.
[mbar] (mm) [Ø/mm] min max [%] [%]
FL [rpm] FH [rpm] min max IG
Nat gas (G20) 20 5,6 - 26 1550 95 5700 9,5 9,1 40
Nat gas (G25) 25 7,0 - 26 1550 95 5700 9,5 9,1 50
Propane (G31) 37 5,6 - 24 1460 92 5500 11,0 11,0 45
ALKON 70 c
Type of
Gas
Supply
Press..
Ø
Nozzles
Collector
diaphragm
Fan
speed
CO
2
levels Start-up
power.
[mbar] (mm) [Ø/mm] min max [%] [%]
FL [rpm] FH [rpm] min max IG
Nat gas (G20) 20 9 - 20 1550 99 5700 8,9 9,5 50
Nat gas (G25) 25 9 - 20 1550 99 5700 8,9 9,5 50
Propane (G31) 37 9 - 20 1440 90 6500 11,0 11,0 60