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NEW T87 HONEYWELL T STAT? PROBLEM WITH SHORT CYCLING GAS STEAM

Unknown
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in THE MAIN WALL
Isn't it adjustable? If it was a regular merc one I'd be looking at the anticipator setting.

Comments

  • WV EGBERT_2
    WV EGBERT_2 Member Posts: 98
    NEW T87 T STAT SHORT CYCLING GAS STEAM BOILERS

    I have had several customers that have installed the new
    merc free t87 Honeywell on Gas steam systems and the boilers short cycle like crazy...used on Utica Burnham and Peerless..anyone else have this prob?
  • WV EGBERT_2
    WV EGBERT_2 Member Posts: 98


    NO IT HAS DIP SWITCHES IN THE BACK...NOT LIKE THE T87F
    THAT HAD HEAT ANTICIPATOR
  • Ross_7
    Ross_7 Member Posts: 577
    dip switches

    The dip switches on the back should be set to your type of heating equipment. Steam should be 1 cph, It's listed right on the back of the thermostat. I believe that they both should be set to "On" or both up, if I remember right.
    Good Luck!

    Ross
  • WV EGBERT_2
    WV EGBERT_2 Member Posts: 98


    Ross the switches are set the right way for steam...
    Its still a mystery
  • Ross_7
    Ross_7 Member Posts: 577


    Ok, Thanks for checking, EG. Maybe the control on your boiler can't handle a power robbing thermostat, so either a isolation relay needs to be installed or trya battery powered thermostat, with a dry set of contacts.
    Ross
  • Ken Field
    Ken Field Member Posts: 123
    Power robbing stat

    can be a problem. I read that somewhere else this week. It can drive you crazy. Just get a Focus Pro TH5110. The cost is almost identical and the cycle rate is adjustable. I think you want maybe 2 cycles per hour.

    Ken F

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