Installation manual

Coopra Advanced Heating Technologies Installation manual 40 EN
18
4.10. Changing over to LPG-gas
First: the venturi adjusting screw fully clockwise until it
blocks.
Fit a flue gas analyser (CO
2
meter) in the measurement
opening of the flue tube canal.
Full load on LPG
Activate the chimney sweeper function on full load.
Turn the venturi adjusting
screw fully clockwise until it
blocks.
Unscrew the venturi adjusting
screw half a full turn anti-
clockwise. Try to start the
appliance.
Unscrew the venturi adjusting
screw another half a full turn
anti-clockwise. Try to start the appliance.
Repeat till the boiler starts.
(A guide for the dimension from the top of the screw to the top
of the support is 16 mm).
Read the CO
2
value on the flue gas analyser. If the value
does not correspond with the value for propane gas G31
(9,8% CO
2
), carefully adjust the venturi screw until the correct
value is obtained.
Low load on LPG
Activate the chimney sweeper function on low load.
If the gas control is already
properly adjusted for natural
gas, then the low load will not
need to be adjusted.
If necessary, adjust the gas regulator screw until the correct
value ((9,2% CO
2
) is obtained. Note that this setting is critical
to adjust.