Riello TAU Unit 50 Installation And Maintenance Manual page 49

Diagram 4: circuit with thermal module connected through separator to the heating system. DHW production with heater
and diverting valve on primary circuit
SE
OFF
S1
ON
VLPG(*)
EAF
1 3 4
1 Isolating valve
2 Non-return valve
3 Pressure reducer
4 Water softener filter
5 Safety valve
6 Drain
7 VIC INAIL housing
8 Minimum pressure switch
9 Lockout pressure switch
10 Pressure gauge
11 Control thermostat housing
12 Temperature gauge
13 Flow-meter
14 Expansion tank
15 Automatic bleed valve
16 Storage cylinder
17 Separator
(*) According to the set parameters it is possible to control a fuel shut-off gas solenoid valve for LPG.
9
Domestic hot water and central heating circuits must be completed with expansion vessels of adequate capacity and suitable,
correctly-sized safety valves. The discharge of safety valves and appliances must be connected to a suitable collection and dis-
posal system (see Catalogue for compatible accessories).
9
The choice of system components and the method of their installation are left up to the heating engineer installing the system.
Installers must use their expertise to ensure proper installation and functioning in conformity to all applicable legislation.
9
Special supply/refill water must be conditioned using suitable treatment systems.
0
It is prohibited to operate the thermal module without water.
TA/OT
5
6
7
pm
8
9
pb
p
10
11
1
6
T
12
F 13
2
PC
15
14
1
M
17
VD
1
1
6
1
ZM
SI
1 PI 2 1
1
EAF Domestic cold water inlet
UAC Domestic hot water outlet
MI High temperature system flow
RI High temperature system return
PC Thermal unit circulation pump
VD DHW diverting valve
PB DHW circulator
PR DHW circulation pump (not managed)
SE Outdoor sensor
SB Heater probe/thermostat
VLPG LPG fuel shut-off valve (*)
ZM Zone management electronic device
PI Central heating system pump
SI System delivery probe
TA Room thermostat (accessory)
OT Open Therm Interface (accessory)
49
UAC
1
TA
PR
2
1
15
SB
16
MI
RI
INSTALLATION
5
6
14
6