27
9.1 RELATED DOCUMENTS
BS 5440
PARTS 1 & 2
FLUES & VENTILATION REQUIREMENTS
BS 5449
PART 1
FORCED CIRCULATION OF HOT WATER SYSTEMS
BS 5482
PART 1
DOMESTIC BUTANE & PROPANE GAS BURNERS IN PERMAMENT
DWELLINGS
BS 5546
INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
BS 6798
INSTALLATION OF BOILERS OF RATED NOT EXCEEDING 60kW
SECTION 9 - LPG INSTRUCTIONS
9.6 CHECKING THE CO
2
AND ADJUSTING THE
GAS VALVE
THE GAS VALVE MUST BE SET-UP OR ADJUSTED WITH
THE AID OF A PROPERLY CALIBRATED FLUE GAS ANA
-
LYSER.
Isolate the appliance from the electrical supply and remove
the appliance casing as described in 4.7.1. Set the flue gas
analyser to read CO
2
and insert the probe into the flue analysis
test point (
Y1-Z1
fig. 39). Restore the electrical supply to the
boiler and switch the boiler to the OFF mode.
Have access to the printed circuit board, locate and open the
closing plug on the dash board
(L2
fig. 40
)
, locate and press
the CO
button (see fig. 36 pos. SW1). The appliance will now
operate in CO
2
mode for approximately 15-minutes.
9.6.1 CO
2
FUNCTION SETTINGS
Locate the CO
button (see 7.3)
Select the main selector switch in position
CO
2
FUNCTIONS
ACTION ON THE BUTTON
LED STATUS
combustion analysis mode
press once = burner running at maximum heating
yellow led blinking
gas valve maximun setting (*) press twice = burner running at maximum absolutte yellow led bl red led fixed
gas valve minimum setting
press three time = burner running at minimum
yellow led bl green led fixed
NOTE
1 - Any additional pressing of CO button after the third time the burner switched between maximum absolute and minimum.
2 - To restart the CO
2
function it is necessary to pass throught the
position with the main selector switch
9.3 CONVERTING THE APPLIANCE GAS TYPE
To convert the appliance to another gas type it is necessary to
change the injector and adjust the gas valve (CO
2
).
•
To change the injector see 6.12.1
•
To replace/insert the flange on the silencer see 6.15
•
To adjust CO
2
values see 10.6
9.4 GAS SUPPLY
The gas supply must be connected to the appliance by a com-
petent LPG installer and must be of sufficient size to supply
the appliance at its maximum output. An existing supply must
be checked to ensure that it is of adequate size to deal with
the maximum rated input of this and any other appliances that
it serves.
9.5 GAS SUPPLY INSTALLATION
The entire installation including the meter must be purged and
checked for gas tightness.
9.6.2 GAS VALVE MAXIMUM SETTING
Set the CO
button at maximum (see 10.3.1), once the
maximum is obtained (only yellow led blinking) check that
it corresponds with the appropriate CO
2
value (Maximum)
for the respective appliance. If the CO
2
reading is correct,
proceed to gas valve minimum setting (10.7.2).
However, if the CO
2
reading is incorrect, the maximum gas
pressure must be adjusted as follows:
•
using a 2.5mm Allen key, very slowly turn the maximum
adjustment screw (see fig. 41) – clockwise to decrease,
counter clockwise to increase – until the correct value is
displayed on the CO
2
analyser (allow time for the analyser
to stabilise).
9.6.3 GAS VALVE MINIMUM SETTING
Set the CO
button at minimum (see 10.3.1), once the
minimum is obtained
(yellow led bl green led fixed)
check that it corresponds with the appropriate CO
2
value
(Minimum) for the respective appliance. If the CO
2
reading
is correct, proceed to completion (10.7.3).
However, if the CO
2
reading is incorrect, the minimum gas
pressure must be adjusted as follows:
•
locate the minimum adjustment screw (fig. 41), using a
suitable screwdriver remove the protection plug
•
using a 4mm Allen key, very slowly turn the minimum
adjustment screw (see fig. 41) - clockwise to increase,
counter clockwise to decrease - until the correct value is
displayed on the CO
2
analyser (allow time for the analyser
to stabilise).
9.6.4 COMPLETION
On completion of the combustion analysis check and/or
any gas valve adjustment, refit the plug
(L2
j
)
and move
the mode selector to the position. Remove the test probe
from the test point and refit the sealing screw/s and/or cap.
IMPORTANT
A GAS TIGHTNESS CHECK MUST BE CARRIED OUT
IF ANY GAS CARRYING COMPONENTS HAVE BEEN
REMOVED, REPLACED OR DISTURBED.
ATTENTION
Gas type and appliance output
must be set
according to
the specific appliance specification.
Vokèra accepts no responsibility if the gas type and/or
appliance output is not correctly adjusted according to
the respective appliance specification as detailed on the
appliance data badge.
(*) this step has not to be used for the system boiler. If you find in this situation press the button once again.
Gas Pressures
Vibe 20A
Vibe 25A
Inlet pressure
37.0 mbar
37.0 mbar
Heating maximum gas rate (kg/hr)
1.55
1.94
Minimum gas rate (kg/hr)
0.39
0.47
Injector size
3.8 mm
4.3 mm
Silencer flange
27 mm
29 mm
CO
2
@ maximum output (%)
10.5
10.5
CO
2
@ minimum output (%)
10.5
10.5
CO @ maximum output (ppm)
190
250
CO @ minimum output (ppm)
20
25
