Riello TAU Unit 50 Installation And Maintenance Manual page 22

INSTALLATION
Low voltage legend
MO1 Low-voltage terminal board
INAIL INAIL safety devices (accessory)
Tpa Water pressure transducer (accessory)
Pmin
Water minimum pressure switch (accessory)
FL Flow-meter (accessory)
PminG GAS minimum pressure switch (accessory)
0-10V 0-10 V DC input
TA/OT Room thermostat / Open Therm Interface (accessory)
SB/TB Heater probe/Heater thermostat (accessory)
SE Outdoor sensor (accessory)
SS Primary circuit system probe in cascade (accessory)
SC Secondary circuit sensor (accessory)
BUS 1 Bus Managing/Zone
24 V 24V exit
MODBUS Modbus outlet
BUS 2 Bus Depending
SCH1 Main control board
SCH2 Display and control card
SM CH flow temperature sensor
SR Return probe
SF Exhaust flue probe
TS Water safety thermostat
TF Flue gas thermostat
DESCRIPTION
Programmable input 1
Programmable input 2
Programmable input 3
Programmable input 7
Programmable input 8
Programmable input 9
Programmable output 1
Programmable output 3
Programmable output 4
Programmable output 5
The input and output settings not shown must not be changed.
High voltage legend
MO2
AE
PI
VLPG
PB
VC
VD
PC
PS
AL
MOD 1
MOD 2
IG
FI
FU
TR1
EA
ER
VG1
VE1
Cable colour
b
bl
g
gr
gra
h
o
p
r
v
w
y
Terminal strip
MO1
MO1
MO1
MO1
MO1
MO2
MO2
MO2
MO2
MO2
22
High-voltage terminal board
Power supply (230V ~ 50Hz)
Central heating system pump
LPG shut-off solenoid valve (accessory)
Storage cylinder circulator
2-way shut-off valve of thermal unit
3-way DHW diverting valve
Thermal unit circulation pump
System circulation pump
Alarm output
PWM/0-10V PC/PS output
PWM/0-10V PI output (not available at present)
Main switch
Mains filter
Fuse
Ignition transformer
Ignition electrode
Detection electrode
Gas valve
Variable speed fan
brown
black
yellow/green
green
grey
blue
orange
pink
red
violet
white
yellow
Terminals No.
24-25-26
21-22-23 (Flow-meter)
21-22 (Flow switch)
19-20
9-10
27-28
13-14
16-17-18
7-8
12-13-14-15
9-10-11
Par. No.
116
117
118
122
123
188
125
127
128
187