2
3. If feedback occurs between stations, reduce volume.
Amplifier volume control is preset at the factory, but
may be readjusted, if necessary.
NOTE: The Alpha Communications
®
/factory war-
ranty 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been replaced by the optional model R2007 AlphaTone™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 warble 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.
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:
1
.
ENTIRE SYSTEM DEAD:
Check 12VAC at transformer
secondary; wiring between transformer and NH209TT-2
amplifier; connections at amplifier terminals and for 117
VAC at transformer primary.
2.
NO CALL UP BUZZER AT HANDSET:
Check for
approx. 12VDC across the two (2) wire leads on the AC
buzzer (or R2007) inside 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. Check to make sure the
DZ209 diode board(s) behind the door entry station are
connected properly. The 'HT' side of the DZ209 should
connect to the selective 'II' terminals from the remote
handsets. The 'T' side of the DZ209 should connect to the
INSIDE HANDSET STATIONS
1. Connect terminal 'I' on handset stations to terminal 'I' on
other handset stations and to terminal '6' on the NH209TT-
2 amplifier/power supply.
2. Connect terminal 'II' on each individual handset station to
the DZ209 Diode Board(s) located in the door entry
station, corresponding to the 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. The door entry speaker (formerly called terminals '11'
and '12' on the older NH209TT amplifier) are factory
installed onto connector pins on the NH209TT-2.
2. The microphone (formerly called terminals 'B' and 'U' to
terminals '9' and '10' on the older NH209TT amplifier) are
factory installed onto connector pins on the NH209TT-2.
TRANSFORMER
1. Connect transformer 12VAC terminals to the 12VAC
input terminals ('1' and '2') on the NH209TT-2 amplifier/
power supply. Do not use this transformer to power any
other device, not included on this system.
2. Do not plug the T1240 (plug-in type) transformer into
electrical outlet or connect to 117 VAC until entire
installation is complete and checked.
DOOR OPENER
1. Connect wires coming from the 12VAC door opener to
amplifier terminals '3' and '4'.
NOTE: use proper gauge wiring to door opener.
NOTE: POLARITY OF AC TYPE DOOR OPENER
TERMINALS IS NOT CRITICAL.
DZ209 DIODE BOARD(s)
1. Connect wires coming from terminal '8' on all diode
boards together and then to terminal '8' on the NH209TT-
2 amplifier.
FINISH INSTALLATION
1. Install stations on housings. Do not overtighten screws.
2. Install amplifier and accessory devices as needed.
3. Plug T1240 transformer into 117 VAC outlet. 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 accor-
dance with the operating instructions.
