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  1. I bit the bullet and adjusted the hi-heat gas...

    I bit the bullet and adjusted the hi-heat gas pressure from the high end of the recommended range to just below the low end of the range (I don't know why the mfr does not want adjustment...with the...
  2. Gas pressure check, sorry for the delay: Inlet...

    Gas pressure check, sorry for the delay: Inlet gas supply pressure is 7.63 inches w.c, in the middle of the specified range of 4.5 to 10. Manifold gas pressure at 100% fire is 3.75, toward the high...
  3. Thought I posted the following this morning, but...

    Thought I posted the following this morning, but it seems to have not showed up.

    I was too lazy on the return air measurement. Doesn't solve the problem, but it's not as bad. What I forgot is...
  4. Well I am partly an idiot. Even though the...

    Well I am partly an idiot. Even though the bypass is always closed, there is an Aprilaire humidifier, so it acts like a bypass in that some air flows from the supply plenum back to the return...
  5. There is a bypass, but it is closed all the time,...

    There is a bypass, but it is closed all the time, the static never gets high enough for it to open. I measured return temperature a lazy way...run it fan-only and see what the supply temp is when...
  6. The way the tech guys at EWC described it to me,...

    The way the tech guys at EWC described it to me, the zone board stands between the stat and the equipment. The communicating thermostat thinks the zone board is the equipment, while the equipment...
  7. The zone board is the UT-3000. It does not need...

    The zone board is the UT-3000. It does not need communicating stats, but having one helps me see what's going on. You can mix communicating and non-communicating stats with this board. The zone...
  8. Amana is the Comfortnet communicating system and...

    Amana is the Comfortnet communicating system and the EWC zone board talks Comfortnet. It controls the furnace fine, but the furnace only pays attention to the heat percentage sent by the zone board....
  9. Excessive heat rise in an Amana AMVM960603BX modulating furnace

    Temperature in the supply plenum rises above what the manual says is the max...pretty quickly. I've been trying to figure this one for many months and it's a mystery. Any insight much appreciated....
  10. Nervous about 2-ton AC for a 3400 sq ft zone in a new house

    Having trouble getting subs to pay attention to what my new house needs. Two different subs say they ran a Manual J on the same plans, but one recommends a 2.5 ton 2-stage unit and one a 4 ton...
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    Thank you jtrammel, baldloonie and comfortdoc! ...

    Thank you jtrammel, baldloonie and comfortdoc!

    I totally get-it about how important sizing and ductwork are. For the equipment, in my situation it sounds to me like a lot of the action is in the...
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    Carrier Infinity versus Ruud/Rheem equipment

    Hello All,

    I'm trying to decide between Rheem/Ruud equipment and Carrier Infinity for two systems serving a four-floor new house, one system for the lower two floors and one for the upper two...
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