Riello 20165080, Installation, Operation And Service Manual

Page: 30 / 56

30
INSTALLATION
Multiple Boiler Piping Schematic with Sequencing Panel
SP
16
16
13
14 15
8
19
19
8
17
16
16
17 16
19 17
17
16
16
16
16
15
6
3
3
11
3
3
3
3
10
9
5
7
7
7
3
3
3
TC
8
18
4
3
5
4
3
10
12 3 3
1
1
1
FLOW
FLOW
FLOW
MAKE-UP
WATER
WATER
INLET
LT (*)
CENTRAL
HEATING
RETURN
HT (*)
CENTRAL
HEATING
RETURN
LT
RETURN (**)
LT
RETURN (**)
LT
RETURN(**)
HT
RETURN
HT RETURN
HT RETURN
CENTRAL
HEATING
SUPPLY
20
2
2
2
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 filter
13 Siphon
14 Condensate outlet
15 Drain
16 Isolation valve
17 Non-return valve
18 Air separator
19 Motorized isolation valve
20 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".