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home-run directly from each monitor to its corresponding
VDU-4 video distributor unit. Additional cables may be used to
serve other monitors on other risers (lines). Depending upon
additional system options and/or functions you may need to run
additional wires. Please consult the factory for more informa-
tion. RG59/U coax cable must be good quality, ALL COPPER,
with minimum 95% copper braiding. As with all systems, we
recommend running some spare wires, for future use.
Route cable away from AC power wiring, transformers,
fluorescent lights, light dimmers or other electrical devices.
Protect cable from damage. Shielded cable should be used if AC
interference is a concern, or if cables cannot be run adequately
spaced away from any source of electrical interference.
DOOR ENTRY STATION
Run 3 conductor #22AWG cable from each speaker/micro-
phone to the NH208TVU amplifier. We recommend using
shielded cable from the speaker/microphone wires to the
NH208TVU amplifier/power supply. Run the #22AWG
pushbutton wiring as well. Route cable away from inside station
cable, AC power wiring, transformers, fluorescent lights, light
dimmers and other electrical devices. Protect cable from
damage. Shielded cable should be used if AC interference is a
concern.
DOOR RELEASE
Run 2 conductor #18 from each door release location to the
central equipment location and NH208TVU amplifier unit.
Route away from any station wiring. Note: if wire run is longer
than 50 feet (15m), use #16AWG cable.
CONNECTIONS
Before connecting, make certain wires are free from shorts or
grounds. Make connections as shown on the enclosed system
diagrams, and as indicated below.
NOTE: Please keep in mind that all wiring terminals
shown may not be in the actual order in which they
appear on the equipment. This is done for clarity of
wiring diagram purposes.
TRANSFORMER
1. Connect the SS146 and SS106 (16VAC) transformers to
the VRU power supply and NH208TVU amplifier unit(s),
respectively, where indicated. Do not use these
transformer(s) to power any other device(s).
2. Do not connect transformer primary to 117 VAC until
entire installation is complete and all wiring is checked.
DOOR RELEASE
1. Connect 16 VAC electric door opener using 2 conductor
#18AWG (polarity not important). Route away from any
station wiring. Note: if wire run is longer than 50 feet
(15m), use #16AWG cable.
FINISH INSTALLATION
1. Install all components. Do not overtighten screws.
2. Connect primary of all transformers to 117 VAC.
Observe all local and national electrical codes.
TEST AND CHECKOUT
1. At all remote monitor+handset stations, make certain the
handsets are completely hung-up on the handset cradle.
2. Check each monitor+handset unit in the system for
operation in accordance with the operating instructions.
3. Check for proper door release function (on systems with
door release capability.
4. On systems with multiples entrances, check for proper
operation from each calling entrance station.
NOTE:
System warranty is void if this system is
installed or used in any manner other than described in
this manual.
OPERATING INSTRUCTIONS
TO PLACE A CALL TO THE REMOTE
MONITOR+HANDSET UNITS:
At the remote door entrance station, depress button (for a few
seconds) for video monitor+handset you wish to call. This will
signal the buzzer (or optional Alphatone™) signal at the
monitor handset, and will cause the video screen to light and
display the visitor. The resident may choose to ignore the
caller, or to lift the intercom handset to answer. Resident may
speak to the visitor by simultaneous 2-way (DUPLEX) voice.
If resident is satisfied with identity of caller and wishes to let
visitor into the building, resident shall momentarily depress the
door release (KEY) button on the handset, which will electri-
cally activate the door release mechanism. Monitor will time-
out automatically after approx. 40 seconds (unless the time-
out duration has been changed by the installer/user). NOTE: in
the lower right hand corner of each monitor unit is a button
marked 'ON'. Momentarily depressing this button will cause
the monitor to activate again, and will time out after the pre-
programmed delay time.
In systems with multiple door entry stations, the system will
automatically switch the voice, video and door release func-
tions to the last entry station that placed a call (when used with
the appropriate multiple entrance adaptors).
CALLING FROM ONE HANDSET STATION TO
ANOTHER HANDSET STATION:
Lift the calling handset off of its cradle and depress the button
corresponding to the handset you wish to call, for a few
seconds. The electric buzzer inside the handset being called
will sound as long as the button is depressed. Wait for the other
party to lift his/her handset to reply. Speak in a normal voice.
Conversation is full duplex type (simultaneous talk and listen).
When conversation is completed, hang-up both handsets on
their cradles.
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