Electrical Connections - Diagram 2 - Riello TAU Unit 50 Installation And Maintenance Manual

CONFIGURATION OF CASCADED THERMAL UNITS
4.3.5

Electrical connections - Diagram 2

MANAGING CONNECTIONS
MO1
28
INAIL
27 INAIL
26
25
24
23 +5V
GND
22
21 SIGNAL
20
...
14
13
12
11
10
9
8
BUS 1
7
M01 Low-voltage terminal board
pm Minimum pressure switch
pb Lockout pressure switch
FL Flow-meter
SB Boiler sensor
SE Outdoor sensor
SS System sensor
BUS 1 Managing / Zones Bus
pb
P.123 = 2
pm
FL
P.117 = 3
SB
P.188 = 1
SE
SS
P.122 = 3
depending 1
terminals 1 e 2
86
MO2
...
18 L
17 N
16
15 L (N.C.)
14 N
L (N.O.)
13
12
11 L
10
N
9
8
7
6
PWM
5
4 GND
...
M02 High-voltage terminal board
PB DHW circulator
V1 Thermal unit two-way valve
PS System circulation pump
L Live
N Neutral
Earth/ground
(*) In place of the fuel shut-off valve VPLG
PB (*)
P.125 = 2
V1
M
P.128 = 1
PS
P.187 = 4