51
Aerator
FIGURE 9-6 Aerator (GMHB227 shown)
FIGURE 9-7 Aerator Top Of Boiler (380)
Purge Valve
9.11 Gas Valve Calibration and CO
2
Adjustment:
Chimney Sweep Function = Manual CO
2
adjustment. CO
2
values shall be checked and adjusted if outside the required
range.
Enable Chimney Function/CSF (Service):
• To enter Chimney function press
and
simultaneously with a long push.
• To enter CSF the Right Knob has to be moved.
When CSF is active the display shows "
ON
" (2 seconds) and
code
304
with boiler power in %:
Turn Right Knob clockwise
and increase power of the boiler
at 100%.
1.
Calibrating MAXIMUM heat output
Check CO2 measured at the flue test port, with boiler
operating at maximum heat capacity, matches that indicted
in Combustion Table below. If it does not, turn adjustment
screw (
V
-Throttle) on gas valve. Turn the screw clockwise
to decrease level of CO
2
and counter-clockwise
to increase
it.
Turn Right knob counter-clockwise
and decrease power of
boiler at 0%.
2.
Calibrating REDUCED heat output
Check the CO2 measured at the flue test port, with
boiler operating at minimum heat capacity, matches that
indicated in Combustion Table below. If it does not, turn
the adjustment screw (K-OFFSET) on the gas valve. Turn
the screw clockwise
to increase the level of CO
2
and
counter-clockwise
to decrease it.
To exit Chimney/CSF function press
and
simultaneously with a long push, or it will automatically time
out after 25 minutes.
PN 240012369, REV A [08/31/2018]
9 - START UP PROCEDURE
