AMX ENV-VST-C - Manual (Page 9)

Installation and Wiring
3 ViewStat Color Communicating Thermostat
Installation and Wiring
This section covers the installation and wiring of a ViewStat Color Communicating Thermostat system.
Disconnecting Power to All HVAC Equipment
Since the thermostats wire directly to the HVAC equipment, you must shut off the power at the
equipment. You can generally accomplish this by turning off the disconnect switch located near the
equipment. If an obvious disconnect switch is unavailable, you need to remove the circuit breaker or
shut down the fuse serving the equipment.
Selecting the Thermostat Location
Determine if the thermostat will be operating alone, or with remote temperature sensors. If the unit is
stand-alone there are certain measures that must be taken to ensure accurate temperature control.
Stand-Alone Thermostat Mounting Criteria
Mount on an interior wall.
In a room frequently occupied.
At least 18 inches (45.72 cm) from any outside wall.
Approximately 5 feet (1.52 m) above the floor. Check with local building codes for height
requirements in commercial applications.
DO NOT locate the thermostat:
Behind doors, in corners or other dead air spaces.
In direct sunlight or near lamps, appliances or other sources of radiant heat.
On an outside wall or wall exposed to an unconditioned space (i.e. garage, etc.).
In the flow path of a supply register, in stairways or near outside doors.
On a wall where concealed pipes and/or duct work will affect the thermostat.
Near sources of electrical interference such as arcing relay contacts.
Remote Temperature Sensors
When choosing a installation location for the remote sensor, follow the guidelines for placement of the
thermostat, and locate the sensor where its operating range (see the ViewStat Color Thermostat
Specifications table on page 1) will not be violated (i.e. do not install in a cold garage or hot equipment
room). See the Installing a Remote Sensor section on page 14 for details.
120 volts may cause serious injury from electrical shock. Disconnect electrical power to the HVAC
system before starting installation. This system is a low-voltage system.
Improper installation may cause serious injury from electrical shock. This system must be installed
by a qualified contractor in accordance with NEC Standards and applicable local and state codes.
Failure to disconnect power could result in damage to the HVAC equipment or thermostats. Leave
the power disconnected until you have made all other electrical connections and checked them for
accuracy.