Venstar ACC0435 Installation Instructions

DIGITAL DUCT MODEL
ACC0435
TEMPERATURE SENSOR
IMPORTANT: READ ALL OF THESE INSTRUCTIONS BEFORE INSTALLING THE SENSOR.

SAFETY CONSIDERATIONS

Read and follow the manufacturer instructions carefully. All wiring must conform to local and national
electrical codes. Improper wiring or installation may damage the sensor.
Recognize safety information. This is the safety alert symbol . When the safety alert symbol is present on
equipment or in the instruction manual, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety alert
symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death.
WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to identify
unsafe practices which may result in minor personal injury or property damage.

GENERAL

The Duct Sensor measures indoor air temperature in the return air duct with a range of -40 to 127 F. If used
indoors as a remote temperature sensor, the sensor will read room temperature and send the information to
the thermostat. If used as a duct temperature sensor, this sensor may be used to provide duct temperature
information (which is not used to control heating or cooling).

Sensor Location

CORRECT LOCATION When used as a duct sensor, this sensor should be mounted in the return air duct. When used as
a remote temperature sensor, the Duct Sensor should be mounted in an indoor location approximately five feet from the
floor, close to or in a frequently used room, preferably on an inside partitioning wall or on a section of wall without pipes or
ductwork. Mount the sensor where temperature operating limits are within 32 to 99 F and the humidity operating range is
within 0 to 95% relative humidity, non-condensing.
INCORRECT LOCATIONS The Duct Sensor should NOT be mounted close to a window, on an outside wall, or next to a
door leading to the outside. Do not mount the sensor in a location where it would be exposed to direct light and heat from
a lamp, the sun, a fireplace, or any other temperature-radiating object which may cause a false reading. Finally, do not
mount the sensor close to or in direct airflow from supply registers or return air grilles and in areas with poor air
circulation (such as behind a door or in an alcove).

Wiring Requirements

The Duct Sensor should be connected to the thermostat using solid conductor CAT 5, CAT 5e, or CAT 6 type network
communication cable. This is an unshielded cable with four twisted pairs of 24 gauge solid wire; DO NOT use stranded
cable. The cable length should not exceed 250 feet. If less than 75 feet of cable is required to connect the thermostat to
the Duct Sensor, a three conductor thermostat cable (18-24 gauge) may be used; this cable is NOT suitable for any length
greater than 75 feet.
IMPORTANT: Do no use shielded wire. Do not run sensor wiring in the same conduit as the 24VAC thermostat wiring.
Electrical interference may cause the sensor to give incorrect temperature readings.
CAT 5 Cable
Thermostat Cable
NOTE: All sensor wiring must be in compliance with all applicable local and national codes.
©Venstar Inc. 08/07 P/N 88-617 Rev. 1