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Boiler writing

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valencia29
valencia29 Member Posts: 7
in Gas Heating
I have a boiler with 6 zone using WHITE RODGERS 1311-102.  All to individual thermostats. And a relay RA832A.   The system only has one pump.   I was wondering if I should have the burners and pump wired to the relay or should the pump be running at all times? 

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  • Steamhead
    Steamhead Member Posts: 16,856
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    The circulator (pump) should never be running unless at least one zone is calling for heat (zone valve open). If you "dead-head" a circulator, it can tear itself up.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • valencia29
    valencia29 Member Posts: 7
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    So do u recommend I have both the pump and burners off the line side of the relay? 
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,013
    edited November 2022
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    Typically, pump and boiler should be on the load side.

    X-X (dry contact) of the 832A will go to your boiler. The pump gets wired to terminals 2 (neutral) and 3 (switched load).
    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
    valencia29
  • valencia29
    valencia29 Member Posts: 7
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     I got the T-T going to the 6 zone valves wires in parallel. Wired like this diagram.   My question is do I bring one of the loads from the relay to the transformer that feeds the boiler/burners?  And the other load to the pump 
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,868
    edited November 2022
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    YES!
    That way the pump and the burner will operate only when at least one valve is open.
    There may be a time when only the pump will operate because the burner is off as a result of reaching the high limit aquastat setting, but that is fine.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    valencia29
  • valencia29
    valencia29 Member Posts: 7
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    Thank.  Also if you can answer this just for my knowledge.  On the relay RA832A what are the X-X terminals used for? 
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,868
    edited November 2022
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    Your wiring diagram indicates that you are using the WR 8A02A relay but you show a picture of the Honeywell RA832A relay. Since they are slightly different in the internal wiring I have prepared this diagram that may help in your rewiring.
    X X on the RA832A is not needed in this application
    Just be sure that the zone valve end switch is connected to TT on the RA832A relay. I believe that is probably the way it is already wired, bit check to be sure. The zone valve end switch is connected internally to terminals #2 and #3 in the zone valve.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    valencia29
  • valencia29
    valencia29 Member Posts: 7
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    Thank you 🙏
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,868
    edited November 2022
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    Another thing to consider, With 6 zone valves, you will need a large 24 V transformer (like one rated at 75VA or more)... or there may be two 40VA transformers. Each transformer serving three valves. Be sure if you have 2 transformers serving 6 zone valves, that any rewiring will keep the transformers in phase with each other. ( that means do not reverse the R and the C on the transformers). Follow the same wiring scheme on all 6 valves. This is because #2 post on the valves is common to both the transformers on the valves and the transformer in the RA832A relay.

    Swapping a wire on a system with one valve only, may work just fine, But swapping a wire on multiple valves and multiple transformers can put the transformers out of phase. If that happens, you will let all the smoke out of a transformer or two. Once you let out the smoke, you can't put it back in... You need to replace the transformer. But then if you don't correct the mis-wired circuit, You can let the smoke out of the new one. I find that using a 3amp auto fuse on a 40 VA transformer can save on smoking transformers.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

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