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wiring H.W. L8148E w/ Taco zone valves

I need to wire two taco zone valves with a Honeywell L8148E. The only diag. I can get is w/ H.W. zone valves.  I have terminals marked t,tv,w,z the w,z have a jumper needed for 24v sys. I could use an external transformer , but this has become a challenge I really want to know how to wire it this way. But I don't want to toast the control, $$$.


  • Tim McElwain
    Tim McElwain Member Posts: 4,506
    Go from the "Z" terminal

    on the relay to the thermostat then out of the thermostat to terminal # 1 on the Taco ZV. Then "TV" goes to # 2 terminal on the ZV and finally "T" goes to # 3. You should be all set. 
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