Electrical Connection Of The Mcd Iv; Preparing The Boiler For Operation - CHAFFOTEAUX MCD IV Instrucciones De Instalación Y El Uso

Installation

Preparing the boiler for operation

Electrical connection of the MCD IV

WARNING
Before carrying out any work, disconnect the power supplies using the external double-pole switch.
Scenario no. 1:
The boiler is equipped with a BUS 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,
GB
- 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).
T B
BUS SE
TA2
Scenario no. 2:
The boiler excludes the possibility of a BUS 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 thermostat) terminal block on the boiler and the "AUX1" terminal block on the
module,
Boiler Room thermostat
terminal block
TA
46
a
Boiler Bus terminal block
TN
Module AUX1 terminal block
Module Bus terminal block
Module Bus terminal block
b
The system interface Expert
Control terminal block
BUS
B T