Glow-worm Betacom2 24 - 15 Gas Conversion Adjustments; Settings

0020145065_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.
24
1
2
3
2B
2A
Key
1 Throttle
2 Combustion analyser sample point
2A Flue elbow
2B Verticalueadaptor
3 Cap
• Remove the front panel rst.
• Remove the cap (3) and connect a CO2 analyser to eect 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
15.1.2 Adjustingthemaximumpowersetting
• Activate the test mode "P.01" and set the value to HI in order to
force the burner at P. max. See chapter "Specic adjustment >
Appliance technical settings and parameter list > Test modes".
• Wait approximately 5 minutes to read a stabilized CO
2
value.
MAINTENANCE
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