Riello RTC-80 Series - Page 34

34
INSTALLATION
Multi-Boiler Combination
15
3
10
12
3
3
15
6
3
3
3
11
3
3
3
3
3
10
9
5
7
7
7
SP
8
16
16
17
16
16
16
16
17
16
16 17
17
16
18
4
5
3
TC
8
13
3
8
13
3
13
14
1
1
1
FLOW
FLOW
FLOW
WATER
INLET
LT (*)
CENTRAL
HEATING
RETURN
LT
RETURN (**)
LT
RETURN (**)
LT
RETURN (**)
CENTRAL
HEATING SUPPLY
MAKE-UP
WATER
2
2
2
19
1 Boiler
2 Burner
3 Isolation valves
4 Central heating system pump
5 Non-return valves
6 Automatic vent valve
7 Boiler safety valve
8 Boiler drain valve
9 Y strainer
10 Pressure reducer
11 Expansion tank
12 Water softener lter
13 Siphon
14 Condensate outlet
15 Drain
16 Isolation valve
17 Control valve
18 Air separator
19 Pressure gauge
SP Sequencing panel
TC Control temperature
. _ . _ . Electrical signal
(*) LT= Low Temperature/HT= High Temperature
(**) On the RTC 1000-80 to RTC 4700-80 the low
temperature heating return is located on the top
of the boiler. See "Single Boiler Piping Schematic
Type A".