AMX ViewStat - Manual (Page 40)

Support Module Installation and Wiring
34 ViewStat Communicating Thermostat
6. Snap the circuit board back into the sub-base by sliding the top of the board in first and then snapping
down on the bottom. Check to be sure that the latch holds the board properly.
7. Strip ¼ inch of insulation from the four wires at the support module. Install the wires in the terminals
labeled RSR, RSC, RSB and RSA. One twisted pair of wires should be used for the RSR and RSC
connection and another pair of twisted wires should be used for the RSB and RSA connection. Push the
extra wire back into the wall cavity. Seal the hole in the wall around the cable to eliminate any draft that
might affect the sensor.
8. Connect the wires on the thermostat sub-base to the terminals labeled RSR, RSC, RSB and RSA on the
ViewStat base (see FIG. 5 on page 10) and the Communication and Equipment Terminal Wiring
Definitions table on page 20). Make sure that each terminal on the support module is wired to the
terminal with the same label at the thermostat.
9. If necessary, change the Support Module DIP switch settings as described in Setting the Support Module
DIP Switches section on page 35.
10. Mount the thermostat on the sub-base and confirm that it is displaying the right temperature from the
support module or remote sensor.
Multiple Support Module Installation
Up to 4 support modules can be connected to provide temperature or humidity averaging in a large area or for
several zones being controlled by the same system. The maximum cumulative distance of all the support
modules from the ViewStat is 1000 ft (304.8 m).
FIG. 28 shows daisy-chaining of the VST-TTM Remote Temperature and VST-TRH Remote Temperature/
Humidity Sensors.
FIG. 26 Removing the circuit board
FIG. 27 For side access, cut out the side vents on the scored lines.
Pull down
Cut here for access
DIP switches must be set prior to powering the support module (support module is
powered when thermostat is returned to its base). If switches need to be changed
after powering the support module, the thermostat must be removed from its base for
a minimum of 15 seconds to ensure proper reset of the support module.