DoorBird A1121 Serie Manuel D'installation page 14

Please take care when connecting the cables and wires. Connecting the cables and wires the wrong way
N OT IC E
may damage the device. Wires without insolation material must not protrude out of the green screw
connection terminal, it may lead to electrical short and damage the device.
8
ASSEMBLE THE DEVICE TO THE MOUNTNG HOUSING (BACKBOX)
If you use the surface- or flush-mounted version, assemble the front panel with the attached Main Eletrical
Unit carefully using the orange (Torx+Pin) screw driver provided with the wall mounting-bracket / mounting
housing. Turn the safety screw clockwise until it is hand-tight.
Flush-mounted model
Tighten the safety screw by hand only (less than 5 newton meter [Nm]), otherwise the Main Eletrical
N OT IC E
Unit housing may be damaged.
14
Surface-mounted model
Retro Fit model
If you use the retrofit model, assemble the front
panel with the attached Main Eletrical Unit
carefully to the existing panel using the metal
clamps.