Riello TAU Unit 50 Installation And Maintenance Manual page 97

DEPENDING CONNECTIONS 2-8
MO1
28
INAIL
27 INAIL
26
...
23 +5V
22 GND
21 SIGNAL
20
...
16
15
14
13
...
2
BUS 2
1
M01 Low-voltage terminal board
pm Minimum pressure switch
pb Lockout pressure switch
FL Flow-meter
TA/OT Room thermostat / Open Therm Interface
S2 Zone 2 sensor
BUS 2 Bus Depending
pb
P.123 = 2
pm
FL
P.117 = 3
TA/OT
S2
P.188 = 2
BUS 2
depending 3
terminals 1 e 2
97
CONFIGURATION OF CASCADED THERMAL UNITS
MO2
...
18 L
17
N
16
15
14
N
13 L - DHW (N.O.)/PB/PI
12
11 L
10 N
9
8
7
6 PWM
5
4 GND
...
M02 High-voltage terminal board
VLPG LPG fuel shut-off valve
P2 Zone 2 pump (high temperature)
PC Thermal unit circulation pump
L Live
N Neutral
Earth/ground
VLPG
P.125 = 8
P.128 = 16
P2
PC P.187 = 1