42
Installation
Electrical connection
The boiler has 4 socket blocks for all electrical connections:
1.
High voltage supply (230V)
2.
Volt free switches (230V relays)
3-4. Low voltage sensors and I/O
5.
Communication bus for cascaded ATAG XL W boilers
Electrical connections above can be reached following the steps below:
1. Remove the front panel.
2. Press both external sides of the control unit MMI (E) and tilt the display forwar
(F).
3.
Slide the top panel to the front and use the entrance at the back of the boiler
to insert the cables (H1 for high voltage cable, H2 for low voltage cable).
4. Connect the cable with screw connectors already in the socket blocks.
(2x)
(2x)
0
PWM
L1
N
L2
1.1
1.2
2.1
2.2
3.1
3.2
3 WV/DHW pump (AC)
VFR3
VFR2
VFR1
Output
Output
Output
Output
L
N
L
N
L
N
Line (AC)
Line (AC)
MO1 (AC)
Input
Output
Output
PWM 0-10V GND
5V
NTC
5V
NTC
5V
NTC
5V
NTC 5V
NTC
Signal GND
Signal GND
MO1 (0-10V output)
MTS1 (T10)
MTS2
MTS3
NTC 7
(outd. sensor)
NTC 3 (DHW/
Tank sensor)
eBus
eBus
Input
Output
Output
Input
Input
Input
Input
Input
GND
PWM
0-10V
24V
Signal
GND
24V
Signal
GND
Signal
24V
GND
24V
5V
Signal
GND
GND
Signal
PADIN 3
PADIN 4
PFDIN 1
PADIN 1
PADIN 2
MO2 (0-10V output)
Input
Input
Input
Input
Output
Input
1
2
5
4
A
C
B
D
E
G
H1
H2
J
I
F
Caution:
After removing the panels 230V
parts can be reached.
Electrical connections are only to
EHFDUULHGRXWE\TXDOL¿HGSHRSOH
1
2
3
4
3