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Switching Relays- Are they all equal ?

Cyclist77
Cyclist77 Member Posts: 85
in THE MAIN WALL

So in selecting a switching relay for use with circulator are they all equal? Or do some "perform " better than others?

I currently have a Taco but will be switching my boiler , topossibly a Navien, and I see Navien offers one hand I'm guessing there are a few others out there.

Thoughts?

Comments

  • hot_rod
    hot_rod Member Posts: 24,201

    Caleffi boxes have some unique feature

    RWC thermostat connections

    Snap in transformers with auto reset fuse

    3 sets of dry contacts for heat call

    3 pump relays, two configurable

    Terminals for all the 120v, no wire nuts required

    Pump exercise


    post purge

    Large box with plenty of wiring room

    Easy knock outs

    Front mounted indicator lights

    Piping and wiring guides

    Tech support by technicians

    Made in Canada

    https://www.caleffi.com/sites/default/files/media/external-file/03619_NA.pdf

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Derheatmeister
    Derheatmeister Member Posts: 1,605

    We perfer the Taco and Tekmar products.

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,261

    Caleffi gives you many wonderful options and landings for every wire. Controls lacking landings are tiresome.
    One wish I have for Caleffi is that they make their knockouts a teeny bit larger. NBD because they are plastic and I just ream them open some.

    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • hot_rod
    hot_rod Member Posts: 24,201
    https://forum.heatinghelp.com/discussion/comment/1837323#Comment_1837323

    A Unibit works to enlarge them, or if you want wires to enter thru the back use a Unibit to make an opening.

    UL doesn't require that cardboard fiber divider between 120V and 24 V because we have the 120V terminal strip. Cleans up the look of the box a bit.

    Thanks for the Caleffi support :)

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • tcassano87
    tcassano87 Member Posts: 44

    what navien are you switching too and how many zones do you have?

    The newer Naviens can handle 3 Zones without the need of an external switching relays wire the thermostats and circulators right to the unit itself

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