37
1
Instructions for the installer
Follow this procedure to adjust the other modules as well.
If the measured
flo
w rate is too low, make sure the supply and draining
systems (the supply and draining pipes) are not obstructed.
If they are not obstructed, make sure the burner and/or exchanger
are not dirty.
When replacing the gas valve or
having difficulty with ignition:
Screw general adjusting screw
"A"
on clockwise until
it stops, then unscrew by 7 revolutions.
Check boiler ignition. If it does not start up unscrew
screw
"A"
by one more revolution, then try to start it
up again. If the boiler does not start up again, follow
the operations described above until the boiler does
start up again.
At this point adjust the burner as previously
illustrated.
ATTENTION
Calibrate the
VGs (Gas Valves)
in the heating control
unit referring to the procedures below.
Calibration of the VGs
must be carried out with th
e fl
ue pressure = 0 Pa;
for this reason:
- open the inspection door o
f fl
ue pipe 1;
a
ft
er calibration, close the inspection door.
3)
Completing basic calibration
- Check CO
2
values at the minimum and maxim
um flo
w rate.
- Touch up if necessary.
For smooth operation, calibrate the CO
2
values taking
care to observe the values in the table.
- Close the cap (2 - 3) for th
e fl
ue inspection point back up (1)
NOTE: Do not force the adjusting screw limit switch
limits.
