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Is this normal?

Ken C.
Ken C. Member Posts: 267
in THE MAIN WALL
On many of the boilers I've worked on with Taco zone valves, I notice that there is often a delay of 2 or 3 minutes from the time there is a call for heat to the time the burner kicks on. Why does it take so long for the zone valves to respond to a call for heat? How long should it take for a Taco zone valve to respond? Does this mean the power head is nearing the end of its useful life?

Comments

  • Dan Peel
    Dan Peel Member Posts: 431
    Heat motors

    Unlike the geared zone valves you may be more familiar with the Taco heat motor zone valves are designed to be slow acting. This feature can eliminate water hammer and allow the valve to "float" with a little creative control. With these valves slow is a good thing. Enjoy....Dan

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  • Mark Wolff
    Mark Wolff Member Posts: 256
    Taco Slow Valves

    I hate them for that very reason. Picture troubleshooting intermitten shorting wires on a 20+ year old boiler with wires everywhere and everything you do taking 1-2 minutes to verify.

    Honeywell is the best bet. They are a geared design with isolated end switch and motor wiring. They take a whole 1/4 second to open and close. Make sure they are installed with the directional arrows pointing the right way though!
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