Baxi Combi 200, Инструкция по установке и обслуживанию

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A Minimum rate (offset) adjustment screw.
B Maximum rate adjustment screw.
C Burner gas pressure outlet.
D Gas supply pressure outlet.
Important
The case front panel must be fitted when checking combustion.
Run the boiler for several minutes before checking the CO and CO
2
. To
do this it is necessary to operate the boiler in Chimney sweep mode.
Ensure the boiler is at Maximum rate.
Insert the test probe in the flue sample point and allow the reading to
stabilise.
See
Checking combustion - chimney sweep mode, page 48. 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.
The CO
2
at MAXIMUM rate should be 10.3% +0.5, –0.1. Alter the CO
2
if
necessary by adjusting the gas valve.
Use the Maximum rate adjustment screw (B) to alter the CO
2
. Turn anti-
clockwise (B1) to increase the CO
2
or clockwise (B2) to reduce the CO
2
.
Important
Do not turn the adjustment screw more than 1/8 of a turn at a
time. Allow the analyser reading to settle before any further
adjustment.
Set the boiler to Minimum rate and check the CO
2
. The CO
2
at
MINIMUM rate should be 9.7% +0.1, –0.5. Alter the CO
2
if necessary by
adjusting the gas valve.
Use the Minimum rate adjustment screw (A) to alter the CO
2
. Turn
clockwise (A2) to increase the CO
2
or anti-clockwise (A1) to decrease
the CO
2
.
Check the combustion performance (CO/CO
2
ratio). This must be less
than 0.004.
Important
If the CO
2
is reset at minimum rate it must be rechecked at
maximum rate again and adjusted if required. If the CO
2
is reset at
maximum rate it must be rechecked at minimum rate and adjusted
if required.
Press the Chimney sweep button for 3 seconds to exit the function.
Refit the sampling point plug and ensure there is no leakage of
products.
14.2.5 LPG spare parts
The following spares item is available for the 28kW LPG Combi model.
Key No. Description Part number
154 Air/Gas unit — 28kW LPG only 7679781
Fig.76 Adjusting the gas valve
A
C
D
1
2
B
1
2
PN-0000527
Fig.77 Spare parts — LPG
154
PN-0000543
14 Appendix
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