Ideal Checked against MI

Ideal Logic Combi2 (C24, C30, C35)

Combi, natural gas

Combustion figures

Figure	Natural gas (G20)
CO₂ at high rate More infoHide info Table 1 gives this as CO₂ content at maximum DHW. The air/gas ratio valve is factory set and must not be adjusted.	C24 9.2% ± 0.7 C30 9.3% ± 0.7 C35 9.7% ± 0.7
CO₂ at low rate More infoHide info Table 1 gives this as CO₂ content at minimum CH.	C24, C30 8.5% ± 0.7 C35 8.8% ± 0.7
Maximum CO More infoHide info At maximum and minimum rate (commissioning flowchart, MI p. 67).	Less than 350 ppm
CO/CO₂ ratio More infoHide info At maximum and minimum rate (commissioning flowchart, MI p. 67). The servicing schedule (MI 3.1) uses 0.004: above it, go to the cleaning procedure.	Less than 0.0040
O₂	Not given in MI
Working inlet pressure More infoHide info MI 1.9: minimum permitted operating pressure delivered to the appliance inlet, allowing 1 mbar loss across the pipework from a minimum meter outlet of 19 mbar. Gas supply is 2H G20 20 mbar (Table 1). The 1:1 gas valve gives full output at inlet pressures as low as 14 mbar. Measured at the inlet pressure test point on the gas service cock, at maximum rate.	Appliance inlet minimum 18 mbar
Gas rate at maximum More infoHide info Maximum DHW input (Table 3). Maximum CH input is 2.512 m³/h on all sizes (Table 2). Calculated at a CV of 38.7 MJ/m³ gross. Check at the meter with no other appliance in use, boiler at full DHW output.	C24 2.512 m³/h C30 3.135 m³/h C35 3.657 m³/h
Flue integrity More infoHide info At the air inlet test point, boiler at maximum rate (commissioning flowchart, MI p. 67).	O₂ ≥ 20.6% or CO₂ ≤ 0.2%

From UIN 228296 A05 (August 2022)

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
Logic Combi2 C24	47-349-93	NG
Logic Combi2 C30	47-349-94	NG
Logic Combi2 C35	47-349-95	NG

Source: Ideal Logic Combi2 C24 C30 C35 Installation & Servicing, UIN 228296 A05 (August 2022).

Sections: Table 1 General data; Tables 2 and 3 Performance data; 1.9 Gas supply; 2.24 Commissioning and testing; 2.25 Initial lighting; 2.27 General checks; 2.30 Accessing the installer mode; 3.1 Servicing schedule; Section 6 Flowchart for CO level and combustion ratio check.

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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.