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New NTi boiler. Hot water hit and miss, low pressure. House heat is not maintained. Propane

bjdboop44bjdboop44 Member Posts: 3
Just had new NTI 199btu boiler installed. Hot water is hit and miss and only last 2-3 minutes. House heat is not consistent either. It seems like its calling for heat too much. inside temp thermostat doesn't match thermostat on wall.
To get hot water for the 2-3 seconds, we have to turn on other faucets first.


  • neilcneilc Member Posts: 1,118
    on the domestic,
    what is the temp set to?
    are you mixing cold at the faucets?
    need to maintain a minimum hot flow rate,
    try 105,(110)
    have you or the installer checked the inlet screen?
    could be blocked up with install trash,
    same question on the heating, is the screen clean?
    have all the loops been purged, and again?
    and if so, how?
    don't see purge valves,
    how new is this?
    what type emitters ?
  • bjdboop44bjdboop44 Member Posts: 3
    Update: I decide to chance a 3 minute shower. I turned on the bathroom faucet first then the shower. Low and behold, warm water began flowing to hot water. I jumped in and never had to mix the hot/cold but was able to take a hot shower. Still would appreciate any thoughts on what's going on. We converted from an outside wood boiler to this NTI system. Thank you.
  • kcoppkcopp Member Posts: 3,608
    If it was an outside wood boiler they are usually an open system. There may be a good amount of junk/ rust in the system. At a minimum it will need a good flush out and some system cleaner installed... maybe a power flush.
  • fenkelfenkel Member Posts: 128
    Check you system appears you have a valve open from supply line to return line...its the fourth zone from the left...this should be closed..if it remains opened,  your zones will not maintain constant temp..water is " lazy" and will take the easiest path...
  • fenkelfenkel Member Posts: 128
    Also check your owners might have the dhw settings incorrect.
    Also, your expansion tank and air degas should be before the zone will remove more air from system( might be part ofyour problem).
  • Tom_133Tom_133 Member Posts: 719
    The workmanship and pride in work is lacking. The electrical box was mounted too far from the boiler so they needed an "extension cord". As was mentioned the air separator is in a spot that doesn't allow it to work nearly as well as it could. I dont see any primer on the venting, sure, it could be clean work and I hope so, but from the rest of the job I would check if its primed and glued. Due to the lack of detail, perhaps you are not converted (if you are running on LP) or you may have low gas pressure if you are running on Nat.

    This boiler is pretty robust, and many companies are putting this boiler out HTP, NTI, etc, and I havent seen too many issues so far. From the pics it seems you chose a good boiler but the installer let you down.
    Montpelier Vt
  • Solid_Fuel_ManSolid_Fuel_Man Member Posts: 2,248
    Wonky Piping put that boiler in. I've seen his work before, he is good friends with Murphy. 
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
  • bjdboop44bjdboop44 Member Posts: 3
    We`re still having heat and hot water issues. Does anyone know if NTI 199btu systems require zone valves? Anyone in the Plattsburgh NY area?
  • Jamie HallJamie Hall Member Posts: 14,943
    They shouldn't -- if the zone pumps have built in check valves. Check and see.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.
    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • Tom_133Tom_133 Member Posts: 719
    Jamie is correct, they dont require it. Have you shut off the loop on the header that just ties into itself?
    Montpelier Vt
  • lchmblchmb Member Posts: 2,996
    Contact NTI directly, check with your local government, see if you can locate another install company.. just some suggestions on what i see, you need that install checked by someone other than the original installer....
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