33
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 lue gas
analyser to read CO
2
and insert the probe into the lue analysis
test point (
Y1-Z1
ig. 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
ig. 43
)
, locate and press
the CO
button (see ig. 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 lange 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 suficient 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
30
C
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 lange
27 mm (itted)
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
