Riello 20138572, Installation, Technical Assistance Service And System Management Manual

Page: 87 / 112

87
CASCADE CONNECTION
4.2 Bus connection
The bus connections are made on the MANAGING "M01" low voltage terminal blocks of the connected thermal modules in cascade.
Locate the thermal module that will be deputed to be MANAGING of the system.
Connect a bipolar cable to the contacts 17 and 18 (BUS 1) of the "MO1" of the thermal element M (the bipolar cable already present in
the contacts 17 and 18 must not be removed).
Connect the outgoing bipolar cable from the "MO1" (thermal element M) of the "MANAGING" thermal module into the contacts 21 and
22 (Bus 2) present on the "MO1" of the thermal element D4.
Move the cable in the contacts 17 and 18 (Bus 1) on contacts 19 and 20 (Bus 2).
If you need to connect an additional thermal module, you have to start from contacts 19 and 20 of the "MO1" (element D4) of the
first DEPENDING module, a bipolar cable which will be connected to the terminals 21 and 22 of the "MO1" of the thermal element D8.
Example: cascade connection diagram of three thermal modules:
Thermal module 3
D
8
D
9
1 2 3 4 9 10 11 12 13 14 15 16 17 18 5 6 7 8 19 20 21 22
MO1
INP
. 0-10 V
1 2 3 4 5 6
1 2 3 4 5 6
ROOM TH. MODBUS
7 8 9 10
7 8 9 10
T_DHW_ST
.
T_SYSTEM
11 12 13 14
11 12 13 14
T_OUTD. T_SYST_2
15 16 17 18
15 16 17 18
OUT
. 0-10V
BUS 1
19 20 21 22
19 20 21 22
BUS 2 BUS 2
1 2 3 4 9 10 11 12 13 14 15 16 17 18 5 6 7 8 19 20 21 22
INP
. 0-10 V
1 2 3 4 5 6
1 2 3 4 5 6
ROOM TH. MODBUS
7 8 9 10
7 8 9 10
T_DHW_ST
.
T_SYSTEM
11 12 13 14
11 12 13 14
T_OUTD. T_SYST_2
15 16 17 18
15 16 17 18
OUT
. 0-10V
BUS 1
19 20 21 22
19 20 21 22
BUS 2 BUS 2
Thermal module 1
M D
1
D
2
D
3
MO1 MO1
1 2 3 4 9 10 11 12 13 14 15 16 17 18 5 6 7 8 19 20 21 22
INP
. 0-10 V
1 2 3 4 5 6
1 2 3 4 5 6
ROOM TH. MODBUS
7 8 9 10
7 8 9 10
T_DHW_ST
.
T_SYSTEM
11 12 13 14
11 12 13 14
T_OUTD. T_SYST_2
15 16 17 18
15 16 17 18
OUT
. 0-10V
BUS 1
19 20 21 22
19 20 21 22
BUS 2 BUS 2
1 2 3 4 9 10 11 12 13 14 15 16 17 18 5 6 7 8 19 20 21 22
INP
. 0-10 V
1 2 3 4 5 6
1 2 3 4 5 6
ROOM TH. MODBUS
7 8 9 10
7 8 9 10
T_DHW_ST
.
T_SYSTEM
11 12 13 14
11 12 13 14
T_OUTD. T_SYST_2
15 16 17 18
15 16 17 18
OUT
. 0-10V
BUS 1
19 20 21 22
19 20 21 22
BUS 2 BUS 2
Thermal module 2
D
4
D
5
D
6
D
7