Glow-worm Ultrapower sxi system store (100sxi, 170sxi)
System store, natural gas (LPG by conversion)
Combustion figures
| Figure | Natural gas (G20) | LPG (G31) |
|---|---|---|
CO₂ at high rate More infoHide infoMeasured after 5 minutes (LPG: after 5 minutes at max rate). The servicing table (section 13) calls these nominal and gives NG case off as 9.0 with no tolerance; the specification table (section 1) gives 9.0 ± 0.5. The NG tables don’t name the rate, but the maximum rate check in section 13 refers to them. The MI says NG combustion is factory set and no measurement is necessary at first lighting. Same figures for 100sxi and 170sxi. |
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CO₂ at low rate More infoHide infoSection 13 says to go on to check the minimum rate adjustment, but the MI gives no minimum rate figure or procedure. | Not given in MI | Not given in MI |
Maximum CO | Not given in MI | Not given in MI |
CO/CO₂ ratio | 0.004 | 0.004 |
O₂ | Not given in MI | Not given in MI |
Working inlet pressure More infoHide infoNominal supply pressure, checked at the gas service isolation valve test point with all other gas appliances working. Measured at the gas valve it can be up to 2 mbar less. The MI says the nominal maximum heat input can be reached at an inlet pressure down to 15 mbar (gas type not stated). |
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Gas rate at maximum More infoHide infoApproximate, after 10 minutes from cold. Minimum: NG 0.48 m³/h, LPG 0.7 kg/h. The central heating range rating table (section 12.7) gives 2.5 m³/h at 24 kW, the highest central heating setting. | 3.30 m³/h | 2.4 kg/h |
From 0020048525-04 09.09
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 |
|---|---|---|
| 100sxi | 41-019-09 | NG |
| 170sxi | 41-019-10 | NG |
Source: Glow-worm Ultrapower sxi Installation and Servicing, 0020048525-04 09.09.
Sections: 1 Boiler Specifications; 12.4 Initial Lighting; 12.6 Gas Inlet Pressure and Gas Rate; 12.7 Range Rating; 12.11 LPG Conversion; 13 Servicing: Combustion check and setting the air/gas ratio valve, Maximum Rate Check and Adjustment.
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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.