5.6.1 Wiring diagram
Observe the instructions for the electrical installation (see Ch. 5.6).
The maximum total current of all external loads must not exceed 4.5 A.
B3
S1
F1
230V
6,3
AT
B1
H2
H1
N
L
eBUS
Modul
µC - Unit
230 V/50 Hz
L N PE
D
A
A
D
B3
1 M
230V
L
H1
L E
H2
L E
1 2
eBUS
+ -
1 M
B1
1 M
1 M
N1
1 M
2 ... 10 V
N
L N
MFA 1
L N
MFA 2
MFA 1
MFA 2
VA1
B11
B11
WCM-EM
WCM-FS
D
D
16A
4 ... 20 mA
n
AC
DC
WCM - CPU
U(I)
Plug
Colour
Connection
Remarks
230V
↑
Black
Voltage supply 230 V AC / 50 Hz
–
H1
Turquoise
Input 230 V AC/2 mA
–
H2
Red
Input 230 V AC/2 mA
–
MFA 1
Purple
Relay output 230 V AC
max 3 A (AC1)
MFA 2
Purple
Relay output 230 V AC
max 3 A (AC1)
VA1
Brown
Potential free relay output
230 V AC/max 3 A (AC1)
eBUS
Light blue
WCM components (FS, EM, KA, COM)
–
B11
White
De-couple sensor NTC 5 k
Ω
0 … 99 °C
B1
Green
External sensor NTC 600
Ω
-40 … 50 °C
B3
Yellow
DHW sensor NTC 12 k
Ω
0 … 99 °C
Dark blue
Control signal for speed controlled
pump PWM
–
N1
Orange
Temperature remote control
2 … 10 V; 4 … 20 mA
–
Installation and operating instruction
Gas condensing boiler WTC-GB 90-A
5 Installation
83266502 • 1/2010-08 • La
29-95
