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Vaporstat model

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btc
btc Member Posts: 43
in THE MAIN WALL
Im convinced. Want to put vaporstat on my single pipe steam, 135,000BTU gas fired boiler. Currently using old PA404A.
Any recommendations on the specific vaporstat make/model number to consider--there seem to be numerous choices--many of which seem to only have subtle (but meaningful?!)differences.

Thanks.

Comments

  • Mad Dog
    Mad Dog Member Posts: 2,595
    How well vented is your system?

    If it is average, I'd opt for the Honeywell vaporstat that has a range up to 4 psi. If you can , though vemt with Gorton #2s and go for the Honeywell Vaporstat that goes up to only 16 ounces (L408A). Mad Dog

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  • btc
    btc Member Posts: 43


    Thanks for the response. I have Gorton #1's at the end of each main (20 ft each way with 2" mains). Have been considering Gorton #2's. Is there any problem increasing the venting rate--is there such a thing as too much venting at mains?
    Thanks. Brian
  • [Deleted User]
    [Deleted User] Posts: 410
    never to much venting,,

    mad dog has a rack of gorton 2's on his..you can see it at hvactv..really sweet
  • Mad Dog
    Mad Dog Member Posts: 2,595
    no, you can not vent too much

    sometimes radiators venting rate needs to be slowed down, but the mains.....let 'er rip. I might add more too , Gerry! Mad Dog

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  • scrook_2
    scrook_2 Member Posts: 610
    L408A Vaporstat

    is available as 0-16 oz./sq. in. w/ 2-16 oz./sq. in. subtractive differential and as 0-4 lb./sq. in. w/ 4-16 oz./sq. in. subtractive differential, SPST Break on pressure rise. The 0-4 psi unit would let you go to 1.25 or even 1.5 psi cutout w/ a 1 psi differential, which might be handy if your main vents are small, but the 0-1 psi (0-16 oz) unit would prevent setting the pressure too high. Either should be much easier to set than a PA404A at low pressures. You could keep the PA404A, put it on a seperate pigtail and set it to ~3 psi cutout as a safety limit should the vaporstat fail closed.
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