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    Monitor boiler

    347
    347 Member Posts: 143
    in THE MAIN WALL
    Hello all,
    Came across this boiler today which I'm told is a Monitor MZ 225c. It is shot cycling (on/off) every minute or so.
    The customer needs to reset the boiler every time he wants heat. It looks like he presses a reset button on flue pipe which I think is a limit switch.
    I could not find any manual on the job or online for any help.
    I attached (I hope) some pictures of the boiler and heater it is connected to. It's a single zone system with the indirect. I think it needs some additional piping but I'm not sure. Any help would be great.
    Thanks.





    Tor

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    Comments

    • ch4man
      ch4man Member Posts: 297
      wow, i thought i was the only one to ever see one of those.

      French made POS. if it is the flue gas limit thats tripping its scaled up inside and out. I loved how the honeywell ignition control is a single try for ignition. one misfire and its locked out- no heat

      good luck
    • 347
      347 Member Posts: 143
      Thanks for the responce. Do you have any idea where to get a piping diagram or manual? I can access anything on line and have no clue who the local rep is.
    • Dan Foley
      Dan Foley Member Posts: 1,268
      MZ has been out of business for several years. I put in 50+ of these. I still have a few parts. I also have all of the service manuals. Send me you e-mail address.

      @ch4man I second your opinion on the Honeywell module with one try for ignition.
      Rich_49
    • 347
      347 Member Posts: 143
      Dan, I think I sent you a pm, just not sure if it went through.
    • Dan Foley
      Dan Foley Member Posts: 1,268
      @347 Got it. Coming your way.
      Rich_49
    • Alan (California Radiant) Forbes
      Alan (California Radiant) Forbes Member Posts: 4,378
      Here are my notes on where to find parts for Monitor boilers, but they are from 2012 and they may no longer be available.

      6/13/12 Spoke to Rob Kushner (oilman501@aol.com) and ordered parts for Pietkiewicz
      Here is the place
      They are really good.
      Ask for Bob.
      http://www.budnyfuel.com/
      Trenton, NJ

      1/23/12
      monitor parts
      you might want to contact : Nelson & Small on canco rd. in portland, me. / they are, or at least were the northern new england distributor for monitor & toyo stoves..water heaters ..etc.. / may still have parts for your need../ good luck..

      For parts: Northern Heating in Wasilla Alaska has a fair parts selection. 907-376-7515

      Home office: (309)361-9353

      x1 - Sales
      x2 - Tech. support (Nick Russo)
      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
    • 347
      347 Member Posts: 143
      Dan, got it Thank you. ALan thanks for that info. Does any one know what that small rubber hose hanging is or goes to, I could not see it in the parts breakdown Dan sent.
    • Alan (California Radiant) Forbes
      Alan (California Radiant) Forbes Member Posts: 4,378
      Looks like it's attached to the auto air vent.
      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
    • kcopp
      kcopp Member Posts: 4,537
      1/23/12
      monitor parts
      you might want to contact : Nelson & Small on canco rd. in portland, me. / they are, or at least were the northern new england distributor for monitor & toyo stoves..water heaters ..etc.. / may still have parts for your need../ good luck..
      .......

      FWIW... Nelson and Small folded up shop and couple years ago.
    • hot_rod
      hot_rod Member Posts: 24,881
      the short cycling could be related to a flow issue. Did you check the onboard pump? What type of distribution piping? Non barrier tube by chance? Could it be sludged up?

      It was't a bad boiler for early condensing day. Certainly more dependable than some of the early Munches.
      Bob "hot rod" Rohr
      trainer for Caleffi NA
      Living the hydronic dream
    • Alan (California Radiant) Forbes
      Alan (California Radiant) Forbes Member Posts: 4,378
      Also, check that big brass strainer connected to the expansion tank by the braided hose. I've seen those clog up.
      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

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