Coopra 15B Installation Manual

Coopra Advanced Heating Technologies Installation manual E40C
22
4.7. Changing over to LPG (G30/G31)
FIRST:
Turn the venturi adjusting screw fully
clockwise until it blocks. On LPG the adjustment
must start from the situation „No-Gas“.
Be aware that a boiler set on natural gas will give
with LPG an explosion in the burner, damaging the
mixing plates.
Proceed as follows:
Fit a flue gas analyser (CO
2
analyser) in the
measurement opening of
the flue tube.
CO
2
setting At full load At low load
Butane (G30) 9,8 % CO
2
9,2 % CO
2
4.7.1. Full load on LPG (G30)
Activate the chimney sweeper function on full load
In first instance the burner
does not start, because the
gas supply is blocked by the
venture screw turned fully
clockwise on its seat.
When the venturi adjusting
screw (1) blocks on its seat,
gas flow is blocked.
ATTENTION
VENTURI ADJUSTMENT SCREW!
• Turning the venturi screw clockwise to decrease the
CO
2
value (less gas)
• Turning the venturi screw anti-clockwise to increase
the CO
2
value (more gas)
- Unscrew the venturi adjusting screw half a turn anti-
clockwise. Try to start the appliance using chimney
sweeper function.
- Unscrew the venturi adjusting screw another half a full
turn anti-clockwise. Try to start the appliance.
- Repeat till the boiler starts.
IMPORTANT!
 A guide for the dimension from the top of the
screw to the top of the support is 16,5 mm for
LPG (G30/G31)
Read the CO
2
value on the flue gas analyser. If the value
does not correspond with the value for Butane G30 (9, 8
% CO
2
), carefully adjust the venturi screw until the
correct value is obtained.
4.7.2. Low load on LPG (G30)
Activate the chimney sweeper function on low load
Check the CO2-value at low
load on Butane G30 (9,2%
CO
2
).
If the gas control is already
properly adjusted for natural
gas, then the low load will
not need to be adjusted.
When needed:
Re-adjust the gas control screw until the correct value is
reached.
Please note the adjustment with the gas control adjusting
screw is very sensitive. Hardly any turn makes a large
change in the CO2 value.
ATTENTION
GAS CONTROL ADJUSTING SCREW !
• Turning the venturi screw clockwise to increase the
CO
2
value (more gas)
• Turning the venturi screw anti-clockwise to decrease
the CO
2
value (less gas)
4.7.3. Labelling
After changing over to LPG
gas, label the boiler
corresponding the new
setting.

Coopra 15B Specifications

General

Brand	Coopra
Model	15B
Category	Boiler
Language	English