4.4.1
One boiler
1
2
3
4
5
6
7
8
SUPPLY IN
VFD Out
L1
N
N
FAN MOTOR
OUT
REG
NO
C
NC
NO
C
+/~
-/~
+/~
-/~
NO
C
ALARM OUT BOILER
1 - IN
BURNER
1 - OUT
BOILER
2 - IN
BURNER
2 - OUT
C
NO
24 VDC
0V
24V
NC
NO
C
24V
NO
PDS
BUZZER
VFD
0V
0-
10V
0V
24V
0-
10V
0V
A
B
XTP
RS485
This example shows how to connect a voltage signal (18-230 V AC/DC) to EBC24 to start/stop the chimney fan.
• Connect the supply to terminals 1-3.
• Connecting the boiler:
• Connect the burner start signal (L) to terminal 12.
• Connect the neutral wire to terminal 13.
• The start signal for the burner is sent from terminal 15.
• Loop terminals 12 and 14.
• Connect the chimney fan to terminals 4-6.
• Connect the pressure transducer (XTP) to terminals 22-24 with a shielded cable, and connect the dis-
play to terminal 6
3120073-UK EBC24
20
• Pressure control
