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Weil Mclain Ultra gas and 11 zones

Rich P_3
Rich P_3 Member Posts: 34
My co-worker is installing a WM 310. this building has 11 zones using honeywell ra89 relays ( no end switch). Can we easily configure the PHD control to run strictly off outdoor temp or flow or something. Or update the relays? Any input appreciated.

Rich P


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