AMX ENV-VST-C User Manual
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Installation Guide

ENV-VST-CViewStat Color Communicating Thermostat

ATTENTION: READ THIS FIRST!

For more detailed installation, configuration, programming, and operating instructions, refer to the ViewStat Color Communicating Thermostat Operation/Reference Guide availableon-lineat www.amx.com.

FIG. 1 ENV-VST-CViewStat Color Communicating Thermostat

ViewStat Color Communicating Thermostat Specifications (Cont.)

Circuit Board Components:

Communication

Terminals with captive-wireconnectors that connects to the

and HVAC

thermostat, HVAC equipment, control system, remote sensors,

Equipment

and power supply.

connectors

 

 

 

Enclosure:

 

 

 

Material

White plastic and removable front panel. Panel can be painted to

 

match wall decor.

 

Warning: If you paint the panel, do not paint over the exposed

 

thermistor. Doing so can cause the external temperature sensor to

 

work improperly.

 

 

Dimensions

5.31" x 3.93" x 1.18" (13.48 cm x 9.98 cm x 2.99 cm)

(HWD)

 

 

 

Weight

5.29 oz. (150 grams)

 

 

Included

ENV-VST-CViewStat Color Communicating Thermostat

Accessories

Installation Guide (93-2050-01)

 

ENV-VST-TSOViewStat Indoor/Outdoor Temperature sensor

 

(FG2050-22)

 

i!-Weatherapplication(FG3005-20),three-yearsubscription

 

 

Optional

ENV-VST-TSFViewStat Indoor Flush Mount Temperature Sensor

Accessories:

(FG2050-21)

 

 

Overview

The ViewStat Color Communicating Thermostat (FIG. 1) provides the current temperature (from anon-boardsensor, a remote sensor, or an average of theon-boardand remote sensors), controls and displays humidity, and displays the current outdoor temperature. The thermostat displays this information on a 3.5" (8.89 cm) color display. In addition, the thermostat provides the current day's weather forecast along with afive-dayforecast, when connected to anInternet-enabledMaster. The forecast information is driven from AMX’si!-Weatherapplication. Athree-yearsubsciption toi!-Weatheris included with purchase of the thermostat.

Specifications

ViewStat Color Communicating Thermostat Specifications

Control Voltage

24 VAC (interfaces with a power supply through the RC terminals.)

 

Warning: Exceeding the control voltage may cause damage to

 

the thermostat.

 

 

Switched

18 – 30 VAC, 57-63Hz

Voltage

 

 

 

Maximum

2 amps total at rated voltage, through all outputs.

Operating

1 amps through any one output.

Current

 

 

 

Maximum

2.0 A

Surge Current

 

 

 

Internal Battery

CR2032 for maintaining real-timeclock settings during a power

 

loss.

 

 

Control

±1.0° F (± 0.56° C)

Accuracy

±3% relative humidity

 

 

 

Temperature

Maximum displayable indoor temperature: 40° – 99° F

Range

(5° – 37° C)

 

Maximum displayable outdoor temperature: -40°– 120° F

 

(-40°– 49° C)

 

 

Operating

32° – 122° F (0° – 50° C)

Range

 

 

 

Front Panel Components:

 

 

Main LCD

3.5" (8.89 cm) color QVGA (320 x 240) Thin Film Transistor Liquid

display

Crystal Display (TFT-LCD).

 

 

Navigation

The Navigation buttons are used to change various parameters on

buttons

the thermostat, including the temperature setpoints. These

 

buttons are located beneath the display.

 

 

Mode/Select

The Mode/Select button is used to navigate through the various

button

thermostat screens, including the weather screens. This button is

 

located beneath the display.

 

 

Installing a Remote Sensor

Follow these steps to install the remote sensor:

1.Drill a 1/4" hole into the drywall where you want to install the sensor.

2.Fish the cable that connects to the sensor through the 1/4" hole in the wall until the edge of the sensor, where the cord meets the sensor, is flush against the wall.

3.Apply caulk, drywall putty, insulation, or any other appropriate sealant to the hole in the wall around the sensor to seal the hole.

4.Attach the connecting wires from the sensor to the S1 and S2 terminals on the thermostat.

Note: You can use a maximum of 300 ft (91.44 m) of 18 AWG wire for connecting the indoor/outdoor remote sensor to the thermostat.

The thermostat automatically defaults to using the on-boardtemperature sensor when you install it. For information about activating the remote sensor, consult theActivating the External Sensor section of theViewStat Color Communciating Thermostat User Guide.

Mounting the Base to a Wall

You should only mount the thermostat onto a sheetrock wall with the anchors and screws provided with the unit. There are four screw holes located on the base of the thermostat. No tools are required to disassemble the thermostat— simply use your hands to pull the front panel off of the base.

1.Place the base over the wire hole opening in the wall. Level the base (leveling required for appearance only) and mark the screw hole mounting locations.

2.Using the supplied wall anchors, drill 1/4" hole in the center of the marked locations, and tap the wall anchors into the holes. If using the supplied screws only, drill a 3/32" hole in the center of the marked locations.

Note: Minimize the wire entry hole size and seal. Drafts from inside the wall could affect temperature readings.

3.Fasten the base to the wall with the supplied screws.

4.Seal the wire entry with caulk, drywall putty, or insulation.

Wiring the Thermostat

Note: A qualified HVAC technician should perform these steps to ensure proper termination.

1.Make sure the HVAC system power is off.

2.Strip 1/4" (0.63 cm) of insulation from each wire you are using.

3.Secure the wires into the terminals on the base according to the appropriate wiring diagram. Use color-codingpractices (i.e. white wire to W terminal) whenever possible.

4.Check each wire to ensure it is securely fastened, not broken, and any exposed wires are not touching each other.