Wiring Considerations - Observer TSTAT0201CW Installation Manual

Wiring Considerations

NOTE: See the Observer
tions for wiring of Observer Zoning systems.
Ordinary thermostat wire is recommended. Use 22 AWG or
larger for normal wiring applications. Continuous wire lengths
over 25 ft. should use 18 AWG. Wire lengths over 100 ft are
NOT recommended.
NOTE: The communicating bus wiring only requires a
four-wire connection; however, it is good practice to run ther-
mostat cable having more than four wires in the event of a
damaged or broken wire during installation.
Each communicating device in the system has a four-pin
connector. It is recommended that the following color code
be used when wiring each device:
DX+ — Green = Data A
DX- — Yellow = Data B
C — White = 24VAC (Com)
R — Red = 24VAC (Hot)
NOTE: TERMINAL MARKINGS FOR EACH COMMUNICAT-
ING SYSTEM COMPONENT MAY NOT BE IN THE SAME
ORDER. IT IS NOT MANDATORY THAT THE ABOVE COL-
OR CODE BE USED, BUT EACH CONNECTOR IN THE
SYSTEM MUST BE WIRED CONSISTENTLY.
A separate four-pin connector comes inside packaging and
should be used when connecting to furnace (or fan coil). En-
sure connector is inserted properly into circuit board.
1. Turn off all power to equipment.
2. If an existing thermostat or control is being replaced:
a. Remove existing thermostat from wall.
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Zone Panel Installation Instruc-
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