Riello TAU Unit 50 Installation And Maintenance Manual page 94

CONFIGURATION OF CASCADED THERMAL UNITS
MANAGING CONNECTIONS
MO1
28
INAIL
27 INAIL
26
25
24
23 +5V
22 GND
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
94
MO2
...
18 L
17
N
16
15
14 N
13 L - DHW (N.O.)/PB/PI
12
L
11
10
N
9
8
7
6 PWM
5
4 GND
...
M02 High-voltage terminal board
VLPG LPG fuel shut-off valve
PB DHW circulator
PC Thermal unit circulation pump
L Live
N Neutral
Earth/ground
VLPG
P. 125 = 8
PB
P. 128 = 3
PC
P. 187 = 1