Beretta 20141085, Installation Manual

Page: 86 / 112

86
4.2.1 Bus connection
The bus connections are made on the MANAGING "M01" low voltage terminal blocks of the connected thermal modules in cascade.
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
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
Heating module 1
M
m
D
1
S1=ON S1=OFF
D
2
S1=OFF
Heating module 2
D
3
D
4
D
5
S1=OFF S1=OFF S1=OFF
Heating module 3
D
1
M
d
D
2
D
3
S1=OFF S1=OFF S1=OFF S1=OFF
N.B. The cable marked with a dotted line is the one joining BUS 2 on the first managing unit (Mm) with BUS 2 on the second managing unit
(Md) (connect terminal 19 to 19 and 20 to 20). Connect the system sensor (T_syst_2) to terminals 13 and 14 on the Mm.
4.2.2 Setting the main parameters
Some parameters are essential in order for the system to operate in cascade and setting these parameters is a determining factor for correct
system operation.
Par.73
Parameter 73 must be set as follows:
- On the Mm module, set:
Managing
-
On the Md module, set:
DEP 1
Typical parameters for a cascade of cascades
The parameters below are specific to controlling a cascade of a cascades. All of these parameters must be set on the Mm.
The parameter 167 is used for defining the number of direct cascades connected together to form a cascade of cascades.
This parameter must be set on the Mm. In the example shown, the following must be set:
- Parameter 167 = 2
The parameters 158,159, 160 and 161 must be set using the formula below:
- Par. 158 = Par. 75*(N+1)
- Par. 159 = Par. 76*(N+1)
- Par. 160 = Par. 142*(N+1)
- Par. 161 = Par. 143*(N+1)
Where N is the number of modules in the cascade connected to the Mm.