Bosch CONDENS 5000W - Circuit Diagram

Fault finding and diagnosis
Bosch Condens 5000W – 6 720 646 195 (2018/10)
58
7.1.1 Circuit diagram
FAN
FSFR NP LP
L
N
S
N
L
SLR
ST8
ST9
ST17
ST18
ST5 ST4
ST10
Earth
MAINS
SUPPLY
PUMP
SUPPLY
SPARK
TRANSFORMER
ST1
DIAGNOSTIC
INTERFACE
CODE PLUG
Fuse F1, slow
2.5 A, AC 230 V
Fuse F3, slow T 0.5 A
Fuse F2, slow T1.6 A
ST6
EXTERNAL
FROST STAT
(OPTIONAL)
CH TEMPERATURE
CONTROL
Neutral Supply
230V WIRING CENTER/
JUNCTION BOX
BOSCH 24V CONTROLS
PLUG IN POINT
(NOT USED)
Live Supply
Live Return
Neutral
Live
Colour sequence †
Purple
Purple
Red
Red
Orange
Orange
7
8
9
Colour sequence †
SL
L
N
230V/AC
9V 25V
*
PRE WIRED LINK
*
*
EMS BUS contacts
(for FX controls not used)
B
B
4
2
1
A
F
PUMP
GAS
VALVE
SAFETY
SOLENOID
SAFETY
SOLENOID
FLAME SENSE
ELECTRODE
SPARK
ELECTRODES
OVERHEAT
STAT
FLUE
OVERHEAT
STAT
Green
DHW TEMPERATURE
CONTROL (NOT USED)
6720646195-23.1Wo
FLOW TEMP.
SENSOR (NTC)
† Fan wiring:
Live = purple
Neutral = brown
SI1
SI2
SI3
Blue
Blue