Table of Contents
Advertisement
MCA 35
4.11 Electrical diagram
X1
X2
1
3
2
1
2
3
BR
BL
BL
GN/
GN/YW
YW
BR
1
2 3
K1
SCU-C
L N
P
230V, 50Hz
X10
1
2 3
8
9
10 11
BK
BK
BL
RD
BK
BK
1 3
1
1
3 1
X113
X114
X115
X112
2
2
2
FS
RTS
FTS
PS
Power supply
P
SCU-C control panel PCB
On/Off switch
S
Ignition transformer
IT
Ignition power relay
E
Combined venturi and gas valve
GB
unit
15/06/12 - 300022160-001-01
X3
4
5
3 2 1
BR
BL
BL
BR
GN/
YW
3 1
X51
4 2
S
4 5 7 6
12 13
BK
BK
BK
BK
BK
BK
BK
1 2
1 2 3 4
X111
X116
2
PSU
PWM
PUMP
DV
PUMP A Modulating control on the
HLS
FAN
FS
RTS
X5
X6
2 3 4 1
1 2 3
GN/
GY
BK
YW
BL
WH
GN/
BL
YW
3
1 2
3
5
X22
X21
IT
GB
E
X11
1 2 3 4 5 6
1 2
3 4 5 6
OR
YW
WH
RD
GY
GN
SCU-C
DIS
3-way valve
boiler pump
Safety thermostat
Fan
Flowmeter
Return sensor
X8
X7
1 2 3
1 2 3
RD
GN/
WH
YW
BK
BR
BL
1 3 2
3 1 2
1
X121
X41
DV
PUMP A
X12
7 8 9 1 0
X3
X2 X4
X5
X1
X6
X7
X14
Flow sensor
FTS
Pressure sensor
PS
Parameter storage for PCBs
PSU
PCU and SU
PWM PUMP Modulation signal from the
boiler pump
Display
DIS
4. Installation
X9
1
2 3 4 5
BK
BK
BK
BK
BK
1
BK
1 2 4 5
X117
X91
2
FAN
HLS
X8
X9
X10
X11
X13 X12
T001871-H
53
Advertisement
Table of Contents
