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Connecting a Leviton Omnistat2 to a WaterFurnace IntelliZone
Discussion:

When connecting a Leviton Omnistat2 thermostat to WaterFurnace IntelliZone system, isolation relays must be installed between each of the three Omnistat outputs (Y1, Y2, and W2) and the corresponding IntelliZone inputs (Y1, Y2, and Y3), respectively.
 
Resolution:
 
For a simplified installation, use Leviton P/N: Model 29A00-2 24VAC 3-Relay Module for each thermostat that is connected to the IntelliZone panel. See the attached wiring diagram. Note: this is a special order item.
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Article ID: 1131