User Guide

Support Module Installation and Wiring
37
ViewStat Communicating Thermostat
Support Module Installation and Wiring
Follow the guidelines for placement of the support modules (as described below), and locate the
ViewStat indoors where the operating range of the ViewStat (32° - 99°F/0° - 37°C) will not be
violated (i.e. do not install in a cold garage or hot equipment room). Refer to the Support Module
Specifications section on page 3 for more information on the modules.
The thermostat will display one of the following sets of information:
 The remote temperature on the support module at address 1 if its mode is set to "control".
 The average temperature of all support modules set to "control".
 The humidity of the VST-TRH sensors set to the "control" mode.
Installing the VST-TTM and VST-TRH Support Modules
Choosing a mounting location
In choosing a mounting location for the support module(s), locate an interior wall surface in an area
free from drafts. The maximum distance from the thermostat is 1000 ft. (304.8 m).
 Do not mount support module on an exterior wall.
 Avoid routing wires near sources of noise such as computer monitors or fluorescent
lights.
Single Support Module Installation
1. Install the Viewstat according to the instructions in the ViewStat Installation and
Wiring section on page 7. Check to ensure that thermostat is operating (display shows correct
temperature).
2. Choose the wall location where the VST-TTM or VST-TRH module will be mounted. Run
CAT-5 wire from the thermostat to the support module location
(max distance = 1000 ft./304.8 m).
3. Open the support module case by pulling the cover straight forward, as shown in FIG. 25:
Remove the thermostat from its sub-base before wiring the support module to avoid
damage from live wire.
FIG. 25 Opening the support module case