Baxi Combi 224 Installation And Service Manual page 49

Fig.45 Chimney sweep procedure
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Measuring the combustion
Important
The system MUST be cold to ensure the boiler is operating under
full demand.
A
1. Turn the Central Heating and Domestic Hot Water control knobs fully
clockwise.
2. Activate the Chimney Sweep mode by pressing the Chimney Sweep
button for 3 seconds (A). The display will show the activation
sequence (B) then a "P" with 3 bars alongside it alternating with the
current water temperature (C). This indicates the Maximum Domestic
Hot Water rate.
3. Check the CO and CO
result in the Benchmark log at the back of this manual.
4. Press the Chimney Sweep button (A) again to set the boiler to its
B
minimum rate. The display shows a "P" with 1 bar alongside it
alternating with the current water temperature (D).
5. Check the CO and CO
result in the Benchmark log at the back of this manual.
6. A further press of the Chimney Sweep button (A) will set the boiler to
its Maximum Central Heating Rate. The display shows a "P" with 2
bars alongside it alternating with the current water temperature (E).
7. To exit the Chimney sweep function press and hold the Chimney
sweep button for approximately 3 seconds and release.
8. Replace the plug in the flue adaptor test point. Fig. 42.
See
C
If the appliance cannot be operated on central heating for more
than 10 minutes without reaching maximum temperature refer to
Combustion check on small heating systems, page 74.
A
D
E
PN-0000516
levels at the Maximum rate and record the
2
levels at the Minimum rate and record the
2
7 Commissioning
49