Riello TAU Unit 50 Installation And Maintenance Manual page 43

Diagram 1.1: circuit with thermal module directly connected to the system with two direct heating zones
SE
VLPG(*)
EAF
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
(*) 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.
OFF
S1
ON
1
1 3 4 1
TA/OT
5
6
7
pm
8
9
pb
p
10
11
6
T
12
F 13
14
1
1
EAF Domestic cold water inlet
MI 1 First circuit system delivery
RI 1 First circuit system return
MI 2 Second circuit system delivery
RI 2 Second circuit system return
PI 1 First circuit system circulation pump
PI 2 Second circuit system circulation pump
SE Outdoor sensor
ZM Zone management electronic device
SI 2 Second circuit system delivery probe
VLPG LPG fuel shut-off valve (*)
TA Room thermostat (accessory)
OT Open Therm Interface (accessory)
43
TA
ZM
MI 1
PI 1 2 1
MI 2
PI 2 2 1 SI2
RI 1
1
RI 2
1
INSTALLATION