AMX ViewStat, Instruction Manual

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Support Module Installation and Wiring
41
ViewStat Communicating Thermostat
Dip switch 4: Temperature Sensor 2 (VST-TTM support module only)
Sensor 2 is for an external flush-mount or outdoor/duct temperature sensor for the VST-TTM
support module.
Determine whether you want the Sensor 2 input to monitor or control temperature. If DIP switch
number 4 is in the "off " position, it will monitor the temperature.
If DIP switch 4 is set to the "on" position, it will use the reported temperature to control the
thermostat. The sensor control temperature will be displayed on the thermostat. If multiple support
modules are daisy chained together, all of the sensors set to control will be averaged and the
average temperature will be displayed on the thermostat.
Dip switch 4: Humidity Sensor 2 (VST-TRH support module only)
Sensor 2 is for an onboard humidity sensor for the VST-TRH support module.
Determine whether you want the Sensor 2 input to monitor or control humidity. If DIP switch
number 4 is in the "off" position, it will monitor the humidity level (%).
If DIP switch 4 is set to the "on" position, it will control the humidity level and the value will be
displayed on the thermostat (with a % sign to indicate humidity). Up to 4 support modules can be
daisy chained together. All humidity sensors that are set to "Control" mode will be averaged and the
average humidity will be displayed on the thermostat.
DIP switch 6: T1/T2 or Onboard Sensor
Determine whether you want the Sensor 1 input to use the temperature sensed by the onboard
thermistor or to use the input from a remote sensor (i.e. flush mount sensor or duct/outdoor sensor).
If DIP switch number 6 is in the "off" position it will use the remote sensor inputs (T1/T2). If the
DIP switch is in the "on" position, it will use the temperature input from the onboard thermistor.
This option only exists for the Sensor 1 input and can still be configured to monitor or control.
If any of the remaining temperature sensors are also set to "control", the temperature
control averaging will override the humidity control averaging and humidity control
values will be ignored by the thermostat. To ensure that the thermostat recognizes
humidity control values, make sure that all temperature sensors (for this thermostat)
are set to the "Monitor" mode.
The ViewStat will not display temperature or humidity (Sensor 1 or Sensor 2) values if
DIP switch 6 is set to T1/T2 without wiring a sensor to the T1/T2 terminal.
If a sensor is connected to the T1/T2 terminal; DIP switch 6
MUST be set to Off or an
invalid temperatures will be reported to the ViewStat.