Valcom V-1048C User manual

Issue 10
1947049
V-1048C - 45 OHM TALKBACK HORN
INTRODUCTION
These instructions contain the specifications and
guidelines necessary to install, operate, and
maintain the V-1048C, 45 Ohm Talkback Horn.
SPECIFICATIONS
Applications
The V-1048C talkback horn is designed to be
used with "handsfree" talkback control units. In
combination with these units, the speakers
provide both loudspeaker and talkback
functions.
A standard talkback paging system is comprised
of three basic components:
1. Talkback Page Control Unit
2. Speakers
3. Power Supply
Consult your Valcom distributor for assistance in
selecting a control unit and power supply.
Features
45 Ohm input impedance
Easy connection using twisted pair wiring
Universal mounting base
Nominal Specifications
Input Impedance: 45 Ohm
Dimensions & Weight
7.4" H x 10.0"W x 10.4"D
(18.8cm H x 25.4cm W x 26.4cm D)
3.4 lbs. (1.5kg)
Environment
Temperature: -20 to +55oC
Humidity: 0-95% non-precipitating
Limitations
Two talkback speakers maximum per zone
(depending on controller)
800 feet maximum cable length to speaker
NOTE: Do not split pairs to speakers.
Do not use talkback in noisy areas (80 dB or
greater)
Coverage
The distance you can be away from a speaker
and still have good talkback depends on the type
of speaker and ambient noise level.
The speaker should be as close as possible to
the area where talkback is desired. It should not
be mounted close to, or pointed at, noise
producing equipment such as fans, air
conditioners, machinery, or compressors.

2 947049
VALCOM Tip
Ring
Connections to
a V-1048C
White
Black
PAGE
CONTROL
UNIT
The chart below shows maximum talkback
distances relative to the noise level of the
surroundings.
Remember: The speaker is no better than
your ears. If you can not carry on a
conversation at normal voice levels over the
required talkback distance, then talkback
page equipment will not function
satisfactorily.
INSTALLATION
Cabling
Connections should be accomplished using
regular twisted pair wiring. Do not split pairs.
Connections
Connect station or other suitable wire to leads as
follows:
Attaching Speaker to Base
NOTE: For ease of installation, the base can be
attached to the speaker before or after the base
is mounted.
Loosen position adjustment knob
Insert the ball of the base into the socket of
the speaker
Tighten the position adjustment knob
Mounting
Mount the horn to a suitable surface using the
hardware provided. These units can be
mounted to a wall, a beam, or an electrical box.
Mount the base to a wall using the two holes
provided. Knockout holes are provided for
punch out should additional holes be
desired.
A "C" clamp is provided with the horns to
allow mounting to a beam. Place the bolt
through the hole in the bottom of the base to
secure the "C" clamp to the beam (See
Figure 1). It is suggested that the horn be
mounted to the underside of the "I" beam to
provide maximum positioning adjustments.
Connection to an electrical backbox is
accomplished by channeling wire through
the ball of the base and making
appropriate connections. The base has
holes punched for a double-gang square
box, but by punching out additional
knockout holes, the base can be mounted
to a single-gang or octagon box
(See Figure 2).
The horns may be rotated or moved up and
down to obtain the desired position by loosening
the knob at the bottom of the unit approximately
one turn
(See Figures 1 & 2). Make required adjustments
and re-tighten knob.
TROUBLESHOOTING CHART
PROBLEMS
PROBABLE CAUSES AND CORRECTIONS
No Sound in Page Mode
Low Sound in Page Mode
Poor Listening in Talkback Mode
1. Check tip and ring for audio at speaker.
2. Check tip and ring at control unit.
1. Check volume controls at page control.
1. Check talkback volume controls at page control.
Set control at minimum suitable listening level.
Machine
Shop
(Noisy) 90
80
70
60
50
10' 20' 30' 40' 50'
Shipping
(Moderate)
Waiting
Rooms
(Quiet)
Talkback not recommended above 80dB
TYPICAL REPLY DISTANCE CHART
Maximum Talkback Reply Distance

3 947049
TECHNICAL ASSISTANCE
When trouble is reported, verify there are no
broken connections leading to the unit.
Assistance in troubleshooting is available from
the factory. When calling, you should have a
VOM and a telephone test set available and be
calling from the job site. Call [phone]
and press 1 for Technical Support, or visit our
website at http://www.valcom.com.
Valcom equipment is not field repairable.
Valcom, Inc. maintains service facilities in
Roanoke, VA. Should repairs be necessary,
attach a tag to the unit clearly stating company
name, address, phone number, contact person,
and the nature of the problem. Send the unit to:
Valcom, Inc.
Repair and Return Dept.
5614 Hollins Road
Roanoke, VA 24019-5056
VALCOM LIMITED WARRANTY
Valcom, Inc. warrants its products only to the original purchaser, for its own use, to be free from defects in materials and workmanship under conditions of normal
use and service for a period of one year from the date of shipment. This Limited Warrantyobligation shall be limited to the replacement, repair or refund of any
such defective device within the warranty period, provided that:
1. inspection by Valcom, Inc. indicates the validity of the claim;
2. the defect is not the result of damage, misuse or negligence after the original shipment;
3. the product has not been altered in any way or repaired by others and that factory sealed units are unopened (a service charge plus parts
and labor will be applied to units defaced or physically damaged);
4. freight charges for the return of products to Valcom are prepaid;
5. all units 'out of warranty' are subject to a service charge. The service charge will cover minor repairs (major repairs will be subject to
additional charges for parts and labor).
This Limited Warranty is in lieu of and excludes all other warranties, expressed or implied and in no event shall Valcom, Inc. be liable for any
anticipated profits, consequential damages, loss of time or other losses incurred by the buyer in connection with the purchase, operation,
maintenance, installation, removal or use of the product. The maximum liability of Valcom under this warranty is limited to the purchase price of the
specific Product covered by the warranty.
Disclaimer. Except for the Limited Warranty provided herein, the product is provided “as-is” without any warranty of any kind whatsoever including, without
limitation, any WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.
This warranty specifically excludes damage incurred in shipment. In the event a product is received in damaged condition, the carrier should be notified
immediately. Claims for such damage should be filed with the carrier involved in accordance with the F.O.B. point.
Headquarters:
Valcom, Inc.
5614 Hollins Road Roanoke, VA 24019-5056
Phone: [phone] FAX: [phone]

4 947049
I-Beam
"C" Clamp
Speaker Base
Position
Adjustment
Knob
Figure 1 - Mounting to a Beam with a "C" Clamp
Electrical
Backbox
Position
Adjustment
Knob
Wire
Speaker
Base
Figure 2 - Mounting to an Electrical Backbox