AMX ViewStat - Manual (Page 39)

Support Module Installation and Wiring
33 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:
4. Remove the circuit board from the base by pulling back the latch that holds it at the bottom center, as
shown in FIG. 26:
5. Use the sub-base as a template to mark the mounting hole locations on the wall. The word "TOP" is
written in the sub-base. Position the sub-base so that the wires can be pulled through the hole in the top
left-hand corner. Drill size for the wall anchors is 3/16 inch. Mount the
sub-base using the two #6 screws and anchors provided (larger screws will prevent the circuit board from
properly snapping into place).
If side access is preferred for wiring, clip out the side vents on the scored lines (FIG. 27).
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