Technical information

Precautions General

Warning: Electrical shock hazard! Disconnect power before installing or removing the

cover.

• Follow Static precautions when installing this equipment.

• Use copper conductors that are suitable for 167°F (75°C).

• Make all connections according to electrical wiring diagram, national and local electrical

codes.

Static Precautions

Static charges damage electronic components. The microprocessor and associated circuitry

are extremely sensitive to static discharge. Use the following precautions when installing,

servicing, or operating the system.

• Work in a static-free area.

• Discharge static electricity by touching a known, securely grounded object.

• Use a wrist strap connected to earth ground when handling the controller’s printed

circuit board.

Federal Communications Commission (FCC)

This equipment has been tested and found to comply with the limits for a Class B digital

device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide

reasonable protection against harmful interference in residential installations. This

equipment generates, uses, and can radiate radio frequency energy and may cause harmful

interference if not installed and used in accordance with the instructions. Even when

instructions are followed, there is no guarantee that interference will not occur in a particular

installation. If this equipment causes harmful interference to radio or television reception—

which can be determined by turning the equipment off and on—the user is encouraged to

try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment to an outlet on a circuit different from that to which the receiver

is connected.

• Consult the dealer or an experienced radio/television technician for help.

Canadian Department of Communications (DOC)

This class B digital apparatus meets all requirements of the Canadian Interference-Causing

Equipment Regulations.

European Community Directives

This equipment meets all requirements of European Community Directives for Low Voltage

(72/23/EEC), General Safety (92/59/EEC), and Electromagnetic Compatibility

(89/336/EEC).

Location These controllers are suitable for indoor use only.

Caution:

• Avoid locations where excessive moisture, corrosive fumes, vibration, or explosive

vapors are present.

• Avoid electrical noise interference. Do not install near large contactors, electrical

machinery, or welding equipment.

• Locate where ambient temperatures do not exceed 140°F (60 °C) or fall below -40°F

(-40 °C) and relative humidity does not exceed 95% or fall below 5%, non-condensing.