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What is the difference between these control pannels?

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Honeywell HZ311 and Honeywell EMM-3?

Can I replace a EMM-3 with a HZ311 TrueZone control panel?

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  1. The differences I can see is design and EMM-3 also has additional equipment. Kit includes C7735A Discharge Air Temperature Sensor and an AT140A Transformer

    http://customer.honeywell.com/honeywell/...

    TrueZONE™ HZ311 Panel for conventional, single stage applications up to 3 zones (1H/1C).

    http://customer.honeywell.com/honeywell/...

    EMM-3 Electronic MiniZone Panel Kit controls single-stage heating and cooling equipment and is used on two-and three-zone applications. Kit includes C7735A Discharge Air Temperature Sensor and an AT140A Transformer.

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