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  1. HVAC
    Conditions: 1. 3 zone hydronic floor heating, 3 zone pumps, 1 primary pump. Lochinvar Knight 155 mod-con. Basement slab, 1st floor and 2nd floor (extruded plates, insulated). Oversized boiler because of drive-under garage that might get additional modine heater. And global cooling on the way...
  2. General DIY Discussions
    EDIT: Moved this to HVAC section,,,,not sure how to delete. We moved into a large home a few months back and right off the bat had some problems with the zone dampers for the the main floor. The dampers are the rectangular blade type and almost all of them are malfunctioning due to worn...
  3. HVAC
    Hello - I have an A/C system zoned between 2 floors. Just a day ago, a problem popped up. If I set the both the floor 1 thermostat and floor 2 thermostat to 77 degrees, the floor 1 thermostat appears to be working properly and the temp never drops below 77; however the floor 2 temperature will...
  4. HVAC
    Hi, I just bought a 5 unit apartment building and each apartment has its own thermostat and zone from the hot water boiler. The previous owner had an astronomical gas bill each winter because, I guess, the tenants put the heat up high. If I can't figure out something else, I will put thermostat...
  5. HVAC
    Hi, I have recently purchased a new home which has an oil furnace with 3 zones. I replaced the thermostat in the main/lower level with a Honeywell RTH2300 programmable thermostat. The previous thermostat had W,Y,G,R,O and B wires connected. The O was a Brown wire but I don't think that...
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