Maintenance, 16 gas conversion adjustments – Glow-worm Ultracom2 cxi User Manual

Page 39

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0020085231_02 - 05/10 - Glow-worm

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16 Gas conversion adjustments

In order to operate with a gas other than that provided from the

factory, it is necessary to 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 flue gas

analyser is necessary.

The person carrying out a combustion measurement should

have been assessed as competent in the use of a flue gas

analyser and the interpretation of the results.

The flue 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.

16.1 Settings

i

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 2mm Allen key and

an electricians screwdriver.

Having checked :

- the appliance and system have been installed in

accordance with the instructions.

- the integrity of the flue system and flue 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 flue adaptor

3 Cap

• Remove the front panel first.

• Remove the cap (3) and connect a CO2 analyser to effect

the measurement (2).

16.1.1

Adjusting the gas valve

• Press the on/off button to turn the appliance off.

• Turn the screw in the direction and the number of times

indicated in the following table.

Gas adjustment

Model

G20 ► G31

G31 ► G20

24cxi

2 turns

30cxi

3 turns

35cxi

2.5 turns

24cxi

2 turns

30cxi

3 turns

35cxi

2.5 turns

16.1.2

Adjusting the maximum power setting

• Activate the test mode "P.01" and set the value to 100 in

order to force the burner at P. max. See chapter "Specific

adjustment ► Appliance technical settings and parameter list

► Test modes".

• Wait approximately 5 minutes to read a stabilized CO2 value.

MAINTENANCE

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