6.0Boiler Internal Wiring
6.1Boiler Internal Illustrated Wiring Diagram
Central Heating
NTC Flow Sensor
gr gr
Overheat Thermostat
Discharge Float
Switch
Safety Float
Switch
bk
bk
b
r
1 |
4 |
2 |
bk
X900
X300
gr
gr
bk
bk
bk
X400
9 8 7 6 5 4 3 2 1
X401
10 9 8 7 6 5 4 3 2 1
br | b | 5 |
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bk | g | 3 | Fan |
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| 1 |
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| 2 |
| b | g/y |
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| br |
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Control PCB
X501
X500
1 | 2 | 1 | 2 | 3 | 4 |
X1 |
| X2 |
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| 4 |
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| 3 |
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| 2 |
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| 1 |
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| X9 |
5 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| X3 |
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r
Condensate Pump
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| b |
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| b y |
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| bk | br |
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| br |
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| br |
| bk |
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| b | bk |
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| ON/OFF |
| b | br |
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| b |
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br |
| Reset |
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| b |
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| b |
| br |
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| b |
| 3 |
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| Spark |
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| br | |
| N |
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| b | a | ||
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| Generator |
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| 1 2 |
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| r | r |
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| bk |
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| b |
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y |
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| Ignition |
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| Electrode | |
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N 3
1 2
Mains Input (Permanent Live to 3, Switched Live to 1)
b
y
bk
bk
Gas Valve
br | - brown | g | - green |
bk | - black | g/y | - green / yellow |
b | - blue | r | - red |
w | - white | gr | - grey |
y | - yellow |
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20© Baxi Heating UK Ltd 2009
