Riello TAU Unit 50 Installation And Maintenance Manual page 46

INSTALLATION
Electrical connections - Diagram 2
M02
MO2
...
18
L
17
N
16
⏚
15
L - CH (N.C.)
14
N
13
L - DHW (N.O.)/PB/PI
12 ⏚
11
L
10
N
9
⏚
8
7
6
PWM
5
0-10 V
4
GND
...
M02 High-voltage terminal board
VLPG LPG fuel shut-off valve
VD DHW diverter valve. Terminals 15-14 (heating)
terminals 14-13 (DHW)
PC Thermal unit circulation pump
L Live
N Neutral
Earth/ground
M01
MO1
28
27
26
25
24
23
22
21
20
...
16
15
14
13
12
11
10
M01 Low-voltage terminal board
pm Minimum pressure switch
pb Lockout pressure switch
FL Flow-meter (accessory)
TA/OT Room thermostat / Open Therm Interface (accessory)
SB Boiler sensor
SE Outdoor sensor
(*) Remove the jumper and connect the water pressure
switches in sequence as shown.
VLPG
B
AB A
VD
PC
INAIL
pb
(*)
INAIL
pm
+5V
FL
GND
Signal
TA/OT
SB
SE
Basic parameter configuration - Diagram 2
Par.
Description
No.
1 = Climate mode with external probe
1 CH mode
35 DHW mode
42 DHW Priority
117 Prog Input 2
123 Prog Input 8
Progr.ble inp.
124
TA
Progr.ble
125
outp. 1
Progr.ble
128 3 = DHW circulation pump (**)
outp. 4
Progr.ble
187 1 = General circulation pump (*)
outp. 5
Modulating
135 circulation
pump model
Modulating
136 circulation
pump control
(*) Default setting
(**) Settings also valid for DHW diverter valve (VD)
46
Parameter setting
and ambient thermostat
1 = Water heater with probe
2 = On (*)
3 = Heating flowmeter
2 = Water pressure switch (*)
1 = Enabled (*)
0 = Disabled (*)
or
8 = LPG solenoid valve
0 = Wilo Yonos
1 = Salmson
2 = Grundfos (*)
On
Off
Modulating (*)
Fixed 20... 100%
SB
FL
INAIL
TA/OT
VLPG
VD
PC