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VRDK1/CL TECHNICAL MANUAL
VER1.0
INSTALLATION
The wiring diagram towards the back of this manual should be followed carefully. Heavy
duty conductors on wiring diagrams are shown heavily outlined, These wires should be
doubled up.
- Check that all components are free from damage before installing (Do not proceed with
installation in the event of damage).
- Keep all packaging away from children.
- Do not obstruct the ventilation openings or slots on any of the devices.
- All connections to mains voltages must be made to the current national standards (IEE
Wiring regulations)
- Install an appropriate fused spur or isolation switch to isolate the mains.
- Isolate the mains before carrying out any maintenance work on the system.
- All intercom and access control cables must be routed separately from the mains.
L
ock release and AC buzzer back EMF protection :
A capacitor must be fitted across
the terminals on an AC lock release and the AC buzzer inside the telephone.
When using
a DC lock release with a separate DC PSU a diode must be fitted across the terminals of
the lock release as shown in the diagrams below to suppress back EMF voltages.
LOCK RELEASE
12V AC
~ ~
0.1uF capacitor
+
-
1N4002
+
-
12V DC
LOCK RELEASE
DIODE
Safety Note :
An earth connection should also be fitted to the door panel stainless steel
facia using one of the studs provided.
