Ariston Mgm II evo Instrucciones De Instalacion Y Uso página 47

installation
Electrical connection of the MGm II and MGm III evo
WARNING
Before carrying out any work, disconnect the power sup-
plies using the external double-pole switch.
Scenario no. 1:
The boiler is equipped with a BUS BridgeNet® connection.
1) To access the connection block for the boiler peripherals, proceed
as follows:
- remove the boiler's casing panel,
- t ilt the electrical unit forwards,
- push the two clips (a) to access the peripheral connections.
2) To access the connection block for the module peripherals, proceed
as follows:
- remove the module's casing panel,
- undo the two screws (b) and remove the electrical unit's cover,
3) Make the electrical connections between the "BUS" terminal block
on the boiler (B and T) and one of the two "BUS" terminal blocks on
the module (B and T).
Scenario no. 2:
The boiler excludes the possibility of a BUS BridgeNet® connection.
1) To access the connection block for the module peripherals, proceed
as follows:
- remove the module's casing panel,
- undo the two screws (b) and remove the electrical unit's cover,
2) Make the electrical connection between the "TA" (room thermos-
tat) terminal block on the boiler and the "AUX1" terminal block on the
module,
3) Make the electrical connection between one of the two "BUS" ter-
minal blocks on the module and the "B" and "T" terminal blocks on
the system interface.
a
b
Boiler Bus terminal block
T B
BUS SE
TA2
b
Boiler Room thermostat terminal block Module AUX1 terminal block
TA
Module Bus terminal block
Module Bus terminal block
TN
The system interface terminal block
BUS
B T
GB
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