Baxi AGU 2.550 Mode D'emploi page 21

4. ELECTRICAL CONNECTIONS FOR THE ACCESSORY AGU 2.550
X50 Connector linking the electronic boiler board to the AGU 2.550 accessory via a flat cable.
X1 ( L – N ) Power supply connection to the boiler terminal block
X1 ( QX21 – N )
X1 ( QX22 – N ) 230 V programmable relay output
X1 ( QX23 – N )
X2 ( H2 – M ) Programmable 12 V - DC digital or 0 -10 V DC analogue input
X2 ( BX21 – M )
NTC 10K / Pt1000 sensor programmable input
X2 ( BX22 – M )
X2 ( U+ ) 12 V DC output
Terminal block M1 is at high voltage. Before making connections, make sure the appliance is disconnected from the power
supply.
If the appliance is connected to an underfloor system, install a limit thermostat to prevent the latter from overheating.
Make sure that the total rated output of the accessories connected to the AGU 2.550 is lower than 0.5 A. If it is higher, fit a
relay between the AGU 2.550 and the accessory (e.g.: pump).
GENERAL CONFIGURATION
Configure the accessory AGU 2.550, using the switch shown in the figure, as module (1) (the setting is screen-printed onto the
body of the accessory) . If supplementary accessories are used, configure them as modules (2) and (3).
KEY TO CONNECTOR CONNECTIONS
21 7104900.03 (1-11/13)