Honeywell rth221b wiring?

benzdr Posts: 1, Reputation: 1

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Nov 13, 2011, 03:25 PM

Honeywell rth221b wiring?

Forced hot water system second zone. Replace basic two wire rotary. Only two bell wires used with no marking at t stat. Marked t @ t at honeywell box at pump. What would be the correct connection

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