Observer TSTAT0101SC, Installation Manual

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11. Perform installation of all other system equipment (i.e.
humidifier, UV lights, etc.).
12. Turn on power to equipment.
NOTE: In a dual fuel installation with a non­communicating
heat pump, an OAT sensor must be installed, or the heat
pump will not run.
Shielded Wire
If the thermostat wiring will be located near or in parallel with
high voltage wiring, cable TV or Ethernet wiring, then shiel­
ded thermostat wire can be used to reduce or eliminate po­
tential interference. The shield wire should be connected to
the C terminal, or ground, at the indoor unit. The shield wire
should NOT be connected to any terminal at the wall control.
Connecting the shield to ground at both ends can cause cur­
rent loops in the shield, reducing shield effectiveness.
Non­communicating equipment
The Observer Control, when paired with the NAXA00101DB
daughter board, will operate non­communicating equipment.
When the system utilizes the NAXA00101DB daughter
board, the Observer Control operates as a standard univer­
sal thermostat. See Appendix Wiring Diagrams