Immergas HERCULES SOLAR 26 1A Manual page 32

Technical Documentation
HERCULES Solar 26 1A
CO at nominal output
2
(central heating)
G 20 9.50% ± 0,2
G 30 12.30% ± 0,2
G 31 10.60% ± 0,2
To carry out the control correctly and, if necessary, regulate
the air-gas ratio, proceed as follows:
SIT 848 Gas Valve
Calibration of the maximum CO
- start the boiler in chimney sweep functioning mode and
adjust the C.H. temperature selector, present on the control
panel, to maximum.
- withdraw the combustion products by inserting the analyser
probe fully home.
- check whether the value of carbon dioxide (CO
the limits indicated in the table regarding the maximum heat
output (see table above).
- if the values are incorrect, take them within the limits by
acting on the gas flow rate adjusting screws (12) of the gas
valve. By turning in a clockwise direction the CO
decreases, by turning in an anti-clockwise direction, it
increases.
Calibration of the minimum CO
- when the maximum CO
2
temperature selector switch, present on the control panel,
to minimum and check the correspondence of the carbon
dioxide (CO ) value measured with that indicated in the
2
table for the minimum output (see table at the side).
- if the values are incorrect, take them within the limits by
acting on the off-set adjusting screws (3) of the gas valve.
By turning in a clockwise direction the CO
by turning in an anti-clockwise direction, it decreases.
Gas transformation
The adaptation to the type of gas different to that for which
the boilers are prepared as per standard is performed using the
relevant kit (methane or LPG).
The transformation consists in the replacement of the gas
nozzle positioned in correspondence with the inlet of the
Venturi pipe and adjustment of the maximum heat output
(see nominal and minimum heat output regulation).
Finally, check the carbon dioxide value (CO
and minimum power output, which must be corrected if
necessary by regulating the off-set signal (see air-gas ration
regulation).
STHSC ed 0710
CO at minimum output
2
(central heating)
9.00% ± 0,2
11.80% ± 0,2
10.10% ± 0,2
2
) is within
2
value
2
2
has been regulated, take the CH
value increases,
2
) at maximum
2
Technical Documentation
Key:
1 - Gas valve inlet pressure point
2 - Gas valve outlet pressure point
3 - Off/Set adjustment screw
12 - Outlet gas flow rate adjuster
30
HERCULES Solar 26 1A