Circuit Diagram - Bosch CONDENS 5000W User, Installation And Servicing Instructions
Hydronic gas system boiler 18kw
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Also See for CONDENS 5000W:
- Installation and maintenance instructions manual (64 pages) ,
- Operating instructions manual (40 pages) ,
- User manual (20 pages)
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7.1.1
Circuit diagram
GAS
VALVE
SAFETY
SOLENOID
SAFETY
SOLENOID
230V WIRING CENTER/
JUNCTION BOX
Earth
N
Neutral Supply
L
Live Supply
SL
Live Return
CH TEMPERATURE
CONTROL
SPARK
TRANSFORMER
9V
25V
230V/AC
ST1
† Fan wiring:
Live = purple
Neutral = brown
FAN
FLUE
OVERHEAT
STAT
MAINS
SUPPLY
Colour sequence †
*
ST5
L
L
N
N
L
R
S
S
ST10
Fuse F1, slow
SI1
2.5 A, AC 230 V
BOSCH 24V CONTROLS
PLUG IN POINT
(NOT USED)
DIAGNOSTIC
INTERFACE
FLOW TEMP.
SENSOR (NTC)
PUMP
PUMP
EXTERNAL
SUPPLY
FROST STAT
(OPTIONAL)
DHW TEMPERATURE
CONTROL (NOT USED)
B
B
4
2
ST4
ST6
1
FR
FS
NP LP
A
F
ST8
ST17
EMS BUS contacts
(for FX controls not used)
ST9
Fuse F3, slow T 0.5 A
SI2
Fuse F2, slow T1.6 A
SI3
ST18
CODE PLUG
Fault finding and diagnosis | 63
FLAME SENSE
ELECTRODE
OVERHEAT
STAT
SPARK
ELECTRODES
Blue
Blue
Purple
Purple
Orange
Orange
Green
Red
Red
PRE WIRED LINK
6720646195-23.1Wo
6 720 646 195a (2010/11)
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