Home-automation RC-80BZ User Manual download pdf (Page 5)

Common wire is required in “cool only” applications

Figure 6 - Single stage cool only thermostat

* Common wire is required to use the display backlight in the RC-80ZB. Also use

if heat, cool, or fan relay cannot supply 15mA to power thermostat, without activating.

Figure 7 - Single stage heat/cool thermostat

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Home-automation RC-80BZ User Manual Page 5