Alpha NH201TVA-2 User Manual
APPLICATION
NH201TVA-2 Amplifier/Power Supply
Installation and Use Instructions
Used with the HT3001 and/or HT2001 Series
Inside Handset Intercom Stations
The NH201TVA-2 series intercom system allows one or
more HT3001 and/or HT2001 series inside handset stations
to communicate with one or more door entry stations, and
to release the door opener at each door entry station. A
number of optional accessories are available to provide a
complete entry intercom signaling and communications
system.
PROCEDURE
1. Read installation instructions for each unit to determine
equipment location and installation method.
2. Install housings and wiring.
3. Install equipment.
4. Check wiring and connect. Observe all local
electrical codes.
5. Apply power and check operation.
HOUSING INSTALLATION AND
EQUIPMENT LOCATION
INSIDE HANDSET STATIONS
Locate stations where needed at convenient speaking height,
about 4.5 feet (137cm) from the finished floor. Handset
can be secured directly to the finished wall surface or can
be mounted over a single gang electrical 'gem' box or single
gang electrical plaster ring.
OUTSIDE STATION(S)
Locate door station(s) at convenient speaking height on
exterior wall near entrance. When using the NH201TVA-2
(stand alone) amplifier, all door stations must have the
proper speaker and electret condenser microphone installed
(model# TE-TT-201)
NH201TVA-2 AMPLIFIER/POWER SUPPLY
The NH201TVA-2 is usually located in a separate equipment location. You can mount the NH201TVA-2 by using
the provided plastic 'DIN' rail bracket, or by screwing it to
the mounting surface using the holes provided. It must be
located away from any source of direct heat or extreme
cold and in an accessible location. Keep at least 3 feet (1
meter) away from transformers, AC power wiring, trans-
formers, fluorescent lights, light dimmers and other electrical devices. Protect cable from damage.
Shielded cable should be used if interference is a concern.
DOOR RELEASE
Run 2 conductor #18AWG from the electric door release
location to the NH201TVA-2 amplifier. If distance is
greater than 50 feet, use #16AWG cable. Use a separate
cable from the intercom cable, and route away from any
intercom wiring.
CONNECTIONS
Before connecting, make certain wires are free from shorts
or grounds. Make connections as shown on page 4 and as
detailed in the following instructions.
INSIDE HANDSET STATIONS
1. Connect terminals 'I' and 'II' on handset stations to
terminals 'I' and 'II' on other handset stations and to
terminals 'I' and 'II' on the amplifier.
2. Connect terminal 'S' on each individual handset station
to the corresponding push-button at the entry door
station, that is used to signal that handset station.
3. Terminals 'Z' and 'K' on each handset station are
optional terminals, and are only used if the 'Red Dot'
push-button needs to be used to operate an optional
function.
DOOR ENTRY STATION
1. Connect speaker/microphone terminals 'L1' and 'L2'
on door entry station to terminals 'L1' and 'L2' on the
NH201TVA-2 amplifier.
2. Connect speaker/microphone terminals 'M1' and 'M2'
on door entry station to terminals 'M1' and 'M2' on the
NH201TVA-2 amplifier.
TRANSFORMER
1. The NH201TVA-2 should be powered by a 12VAC
transformer. Connect transformer 12VAC terminals
to the input terminals ('0' and '12') on the NH201TVA2 amplifier/power supply. Do not use this transformer
to power any other device, not included on this system.
2. Do not plug T1240 transformer into electrical outlet or
connect a hard-wired transformer primary to 117 VAC
until entire installation is complete and checked.
Copyright© 1995-2009, Alpha Communications®, All Rights Reserved.
AWD109 Rev. 3 (05/2009)
DOOR OPENER
1. Connect one wire coming from door opener to the amplifier
terminal '12'.
2. Connect one wire coming from door opener to amplifier
terminal 'O'.
..
TROUBLESHOOTING
If the system fails to operate as required, review operating
instructions again. If the equipment fails to operate as
indicated in the instructions, check the following points:
NOTE: use proper gauge wiring to door opener.
NOTE: POLARITY OF AC TYPE DOOR OPENER
TERMINALS IS NOT CRITICAL.
FINISH INSTALLATION
1. Install stations on housings. Do not overtighten screws.
2. Install amplifier and accessory devices as needed.
3. Plug T1240 transformer into outlet. If a hard-wired
transformer is used, connect primary to 117 VAC.
Observe all local and national electrical and building
codes.
TEST AND CHECKOUT
1. At all inside handset stations, make sure the handsets are
hung-up and seated properly on the cradle switch, and
that no wires were 'pinched' when handset covers were
affixed.
2. Check each unit in the system for operation in accordance with the operating instructions.
3. If feedback occurs between stations, reduce volume.
Amplifier volume control is preset at the factory, but may
be readjusted, if necessary.
1. ENTIRE SYSTEM DEAD: Check 12VAC at transformer
secondary; wiring between transformer and NH201TVA2 amplifier; connections at amplifier terminals and for 117
VAC at transformer primary.
2. NO CALL UP BUZZER AT HANDSET: Check for
approx. 12VAC at terminals 'II' and 'S' on handset, when
entry station pushbutton is depressed. Temporarily switch
handset with one from a functioning location. Check
wiring connections at remote handset. Check that wiring
inside handset base is not restricting movement of buzzer
clapper; temporarily switch handset to another location
that is functioning, and try again. Check that entry station
pushbutton is making contact, by shorting out the two (2)
wires on the back of the button.
3. NO VOICE ON SYSTEM: Check volume control (poten-
tiometer) on NH201TVA-2 amplifier (in both directions;
up and down). Check terminals 'I' and 'II' to handsets.
Check speaker/microphone connections at each entry
door station. Disconnect terminals 'I' and 'II' on
NH201TVA-2 system amplifier, and connect a single
handset to those terminals. If voice is working, amplifier
and entry speaker/microphone are O.K., so check riser
wiring. If not, amplifier or speaker/microphone could be
faulty. Check by replacement.
NOTE: The Alpha Communications® warranty is void if this
system is installed or used in any manner other than described
in this manual.
OPERATING INSTRUCTIONS
OUTSIDE DOOR STATION
TO CALL HANDSET: Push button on outside door station
to signal inside handset. An electric buzzer will be heard at the
inside handset station. If the electric buzzer has been replaced
by the optional model R2007 AlphaTone™ unit, an electronic
chime sound will be heard at the handset station.
INSIDE HANDSET STATIONS
TO REPLY: Lift the inside handset off of its cradle and
speak in a normal voice. Conversation is full duplex type
(simultaneous talk and listen). If satisfied with the identity of
the caller, you may depress the 'Key Symbol' push-button to
electrically open the entrance door (if so equipped). An AC
type door opener will 'buzz' while operating, indicating permission to enter. When conversation is completed, hang-up
handset on its cradle.
4. UNABLE TO RELEASE DOOR STRIKE: Check wiring
to handset terminals 'I' and 'II'. Temporarily remove door
opener wire going to amplifier terminal 'O' and touch to
terminal '0' on amplifier. Check operating voltage of door
opener matches output from system amplifier. Check
wiring (and gauge) to door opener, from amplifier/power
supply. When using a magnetic type lock or other 'failsafe' type door lock, you should use a reversing relay,
such as our model# PK407A for each entrance.
5. HUM OR BUZZ: Check system wiring installed too close
to power wiring or electrical devices or transformers;
check transformer(s) installed too close to control equipment (should be at least three (3) feet away). Wiring is
being run next to wiring for other systems and/or devices.
6. SQUEALING OR HOWLING: Check amplifier volume
control set too high; check for loose speaker/microphone
at door entry station(s).
7. UNABLE TO TALK TO DOOR STATION: Check
terminals 'I' and 'II' going from handsets to amplifier for
continuity and shorts, grounds, etc. Check for proper
functioning of door entry station speaker. Check for
..
2
Loading...