VOKERA Vision 25C - LPG Instructions and Commissioning; LPG Technical Data and Gas Type Conversion; LPG Gas Valve Adjustment

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10.1 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 10 - LPG INSTRUCTIONS
10.6 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 ue gas
analyser to read CO
2
and insert the probe into the ue analysis
test point (Y1-Z1 g. 40). 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 g. 43), locate and press
the CO
button (see g. 43 pos. SW1). The appliance will now
operate in CO
2
mode for approximately 15-minutes.
10.6.1 CO
2
FUNCTION SETTINGS
Locate the CO
button (see 7.3)
Select the main selector switch in position
10.3 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 the ange on the silencer (only Vision 30C) see 6.15
• To adjust CO2 values see 10.6
10.4 GAS SUPPLY
The gas supply must be connected to the appliance by a com-
petent LPG installer and must be of sufcient 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.
10.5 GAS SUPPLY INSTALLATION
The entire installation including the meter must be purged and
checked for gas tightness.
10.2 TECHNICAL DATA
Gas Pressures Vision 25C Vision 29C
Inlet pressure 37.0 mbar 37.0 mbar
Heating maximum gas rate (kg/hr) 1.55 1.94
DHW maximum gas rate (kg/hr) 1.94 2.25
Minimum gas rate (kg/hr) 0.39 0.47
Injector size 3.9 mm 4.3
Silencer ange 27 mm (tted) 29 mm
CO2 @ maximum output (%) 10.5 10.5
CO2 @ minimum output (%) 10.5 10.5
CO @ maximum output (ppm) 190 250
CO @ minimum output (ppm) 20 25
CO
2
FUNCTIONS ACTION ON THE BUTTON DISPLAY
combustion analysis mode press once = burner running at maximum heating
ACO
gas valve maximun setting press twice = burner running at maximum DHW
ACO
gas valve minimum setting press three time = burner running at minimum
ACO