User Guide

ViewStat Installation and Wiring

iewStat Communicating Thermostat

Checking HVAC System Operation

Use the thermostat buttons to verify that the thermostat is controlling the equipment operation. A

checkout procedure is supplied in the installation instructions supplied with thermostat. This

procedure will verify only that the thermostat operates the equipment.

The HVAC installer may need to connect 24VAC to the R and C terminals to check HVAC

operation. If the automation system is to be installed after the HVAC installation, leave the R and C

terminals connected to ensure the HVAC system operates. If the automation system is installed

before either the placement of HVAC wiring or an external power supply is used, then do not

connect HVAC wires to R and C.

When the thermostat is first turned on all of the graphics of the main LCD are momentarily

displayed; this will look like FIG. 16.

Check Out Procedure

Use the Check Out procedure (below) to determine if the thermostat is controlling the HVAC

equipment.

1. Press the Mode button, and look for the OFF message on the Main display.

2. Press the Fan button. The system blower should start and the message FAN ON appears on the

Main display. Press Fan again to stop.

3. Press the Mode button until the COOL message appears, along with the current cool setting on

the Main display.

FIG. 16 Front panel (with all graphics on Main LCD displayed)

Message display

Scroll/Set-Up buttons

Main (LCD) display

Adjust buttons

The following check-out procedure will turn the heating and cooling equipment on

and off. Do not operate in cooling at low outdoor temperatures. Do not operate in

heating at high outdoor temperatures. Refer to the HVAC equipment manufacturer

specifications for safe operating temperatures.