1902 13th Street SE • PO Box 547 • Brainerd, MN 56401
phone
218-829-9797 •
toll free phone
800-523-6996 •
fax
218-829-0139 •
toll free fax
800-589-3705
www.larcomfg.com
AD14-January 2004
Ultra-Small Receiver Installation
NOTE: Read this manual in its entirety before installing any Larco transmitter or receiver. It is important to complete the
programming procedure before installing the receiver in its final location. The installer must have access to the receiver’s
programming button and must be able to view the receiver’s LED (Light Emitting Diode) during the programming
process.
System
The Larco Ultra-Small Transmitters and Receivers operate at 433.92 MHz (acceptable in the United States, Canada and
any European Union member state) and employ code-hopping technology, to reduce false activations. The receiver only
operates after learning a transmitter’s signal through the simple procedure outlined on the next page. This programming
procedure eliminates the need to set dip switches and involves a simple press of the programming button located on the
top cover of the receiver (see drawings below for details).
Installation
NOTE: Complete the programming
procedure on the next page before
placing the receiver in its final
location.
1. Mount the receiver in a location
so that the antenna is not
surrounded by metal. Metal
attenuates RF signals causing a
reduction in range and
inconsistency of signal reception.
Door operator motors and
controls may also cause radio
frequency interference. Locate
the receiver away from the
door control’s motor(s) and
power supply(s). If the receiver is
mounted in a metal enclosure,
drill a hole in the enclosure and
thread as much of the antenna as
possible through the hole. This
reduces the effects the metal
enclosure will have on the
receiver’s reception.
2. The receiver comes equipped
with a wiring harness for easy
installation. Follow the color-
coding diagram at right.
Diagram 2: Receiver Wiring Harness.
Orange Wire: Normally Open Relay Output
Brown wire with White Stripe: Normally Open Relay Output Common Connection
Red Wire: 24VAC/24VDC Power
Black Wire: Ground
Purple Wire: 12 VDC Power (CAUTION: DO NOT connect 12 VAC Power)
Brown Wire: Normally Closed Relay Output Common Connection
Yellow Wire: Normally Closed Relay Output
Diagram 1: Receiver (left) and Transmitter (right) Dimensional Diagrams
Programming Button
Antenna
See Regulatory Notice on Next Page