0020140413_01 - 09/12 - Glow-worm
15 Gas conversion adjustments
In order to operate with a gas other than that provided from the
factory, it is necessary to make some adjustments to the gas
valve.
This conversion should only be carried out by a competent person
approved at the time by the Health and Safety Executive.
• During the conversion to Propane, use of a suitable ue gas
analyser is necessary.
The person carrying out a combustion measurement should have
been assessed as competent in the use of a ue gas analyser and
the interpretation of the results.
The ue gas analyser used should be one meeting the
requirements of BS7927 or BS-EN50379-3 and be calibrated in
accordance with the analyser manufacturers’ requirements.
Competence can be demonstrated by satisfactory completion
of the CPA1 ACS assessment, which covers the use of electronic
portable combustion gas analysers in accordance with BS 7967,
parts 1 to 4.
15.1 Settings
i
IMPORTANT:
Steps "Switching on" to "Re-pressurising System" will
need to be completed before the appliance can be
converted (See chapter "Commissioning").
Tools required to make the conversion are a 4mm Allen key and
an electricians screwdriver.
Having checked :
- the appliance and system have been installed in
accordance with the instructions.
- the integrity of the ue system and ue seals....
- the integrity of the appliance combustion circuit and relevant
seals....
- that all internal/external controls are calling for heat.
- the gas service isolation valve is opened.
1
2
3
2B
2A
Key
1 Throttle
2 Combustion analyser sample point
2A Flue elbow
2B Verticalueadaptor
3 Cap
• Remove the front panel rst.
• Remove the cap (3) and connect a CO2 analyser to eect the
measurement (2).
15.1.1 Adjusting the gas valve
• Press the on/o button to turn the appliance o.
• Turn the screw in the direction and the number of times
indicated in the following table.
Gas adjustment Model G20 > G31 G31 > G20
24 2 turns
28 3.5 turns
24 2 turns
28 3.5 turns
MAINTENANCE
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