Glow-worm Flexicom cx combi (24cx, 30cx, 35cx)
Combi, natural gas
Combustion figures
| Figure | Natural gas (G20) |
|---|---|
CO₂ at high rate More infoHide infoG20 burner CO₂ table (MI section 12). Check the reading is within the Check column once stable; if adjustment is needed, set it to the Setting column. Front casing panel removed for the check. The same table is used at maximum and minimum rate. Technical data (MI section 1) gives a different figure: burner CO₂ 9.3 nominal, case on and case off, for all three sizes. |
|
CO₂ at low rate More infoHide infoSame G20 burner CO₂ table as at maximum rate (MI section 12). MI says adjustment at minimum rate is very coarse: no more than 1/8 of a turn at a time, waiting 1 minute between adjustments. |
|
Maximum CO | Not given in MI |
CO/CO₂ ratio More infoHide infoMust not exceed this value. If it does, a full service is needed (MI section 12). | 0.004 |
O₂ | Not given in MI |
Working inlet pressure More infoHide infoNominal, at the gas service isolation valve test point with all other gas appliances operating. MI says the safe nominal maximum heat input can be achieved at an inlet pressure down to 15 mbar. |
|
Gas rate at maximum More infoHide infoApproximate, after 10 minutes from cold (MI section 1). The commissioning section (MI section 11.7) gives the approximate maximum gas rates as 24cx 1.9, 30cx 2.6, 35cx 3.3 m³/h. Approximate minimum gas rate 0.99 m³/h for all sizes. |
|
From 0020107232_00 - 02/11
Enter service mode for high and low rate
High rate
Steps not added yet. Follow the MI.
Low rate
Steps not added yet. Follow the MI.
Ending the test: follow the MI.
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| Flexicom 24cx | 47-047-33 | NG |
| Flexicom 30cx | 47-047-34 | NG |
| Flexicom 35cx | 47-047-35 | NG |
Source: Glow-worm Installation and Servicing, Condensing Boilers / Flexicom cx, 0020107232_00 - 02/11.
Sections: 1 Boiler Specification; 11.5 Gas Supply; 11.6 Initial Lighting; 11.7 Check the Gas Inlet Pressure & Gas Rate; 11.8 Central Heating Range Rating; 12 Servicing: Combustion check and setting the air/gas ratio valve.
Spotted something wrong? Tell us.
Check these figures against the MI for the appliance in front of you, matched by GC number and manual date. Combustion work needs a calibrated analyser and a Gas Safe registered engineer.