4.3.7 Flush mounting using the back box
1
Open the knockout holes of the back box and pass
cables through them.
R
See the instructions in "Back box dimensions and
preparation (Page 28)".
2
Install the back box in the wall.
3
Attach the upper and lower plates (
A
) using 4 screws
(
B
) to the back box.
A
B
A
B
4
Set the DIP switches.
R
See page 40 for information about lobby station
DIP switches.
R
See page 41 for information about distributor
DIP switches when using bus wiring.
5
Connect the wires and cables to the lobby station.
R
See 4.6.2 Wire type and maximum wire length
(Page 39).
6
Attach the lobby station to the back box, and then use
the hexalobular wrench to secure the lobby station to
the back box using 1 hexalobular screw (
A
).
R
Do not cover the water drain holes (
B
).
B
A
Note:
R
Required pull-out capacity of a single screw is 294 N
{30 k
g
f} or more. If this criteria is not met, make sure
to take additional measures to increase strength.
Installing 2 frames of a lobby station
When connecting 2 frames of a lobby station together,
use the extension cable (sold separately) and install to
the wall as follows.
B
C
A
D
E
A
Wall
B
Back box
C
Extension cable (VL-VM801; sold separately)
(approx. 1 m)
D
Holes
E
Pass extension cables from hole behind the wall.
29
4. Installation
