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  1. Thanks for all the replies. Beenthere, I also...

    Thanks for all the replies. Beenthere, I also thought it was a code violation to connect a garage to any forced air system. Strangely I have been assured that it is not here. Now, I'm more willing...
  2. Thanks for your reply, aircooled. Here's the...

    Thanks for your reply, aircooled. Here's the (admittedly complicated) story: 3 Floors, basement, garage, 2nd floor. Basement and 2nd floor are conditioned with both supply and return ducts. Garage...
  3. System Sizing: Trane Heat Pump Residential Zoning & New 3-Story 3-Car Garage

    The project: a 3 car garage (36 x 30) over a full conditioned basement with conditioned 2nd floor above the unconditioned garage. About 2000 sf of conditioned space, half above and half below the...
  4. Zoned XL19i Compressors Run In Test Mode But Not On Set Point Call

    Trane 3 ton XL19i, 2TWZ9036 two stage, dual compressor heat pump, TWE040 variable speed air handler, Trane residential zoning assembly ZSASSMAL0100, Master Scheduler Thermostat ZUSTATALMS10.

    Had...
  5. Thanks to all for the good news. The heat pump...

    Thanks to all for the good news. The heat pump was pressure tested at 150 psi for 16 hours. If that was sufficient to pressurize all components regardless of the 4-way valve setting, then it's a...
  6. 4-Way Valve: Can Both Directions Be Pressure Tested After Removing Factory Filters?

    After being told that one of our factory service valves leaked (preventing a “pump-down” and requiring full refrigerant recovery instead), we’ve become hardliners about pressure testing everything...
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    This is not the contractor from whom the...

    This is not the contractor from whom the equipment was purchased and who did the original install. Everything we need to have done by a new contractor is billed strictly on time and materials, which...
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    Emoney, the replacement filter-drier is a...

    Emoney, the replacement filter-drier is a dual-flow Sporlan heat pump filter. We have the box and instructions for it. The filter has double arrows on it pointing in both directions.

    After the...
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    (Sorry, accidental duplicate post removed)

    (Sorry, accidental duplicate post removed)
  10. Replies
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    Thanks, Shophound. I'm glad to hear that the...

    Thanks, Shophound. I'm glad to hear that the fuzz is not likely from lack of nitrogen. It makes sense that oil is holding some type of dust in place on the inside of the pipe.

    The disassembled...
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    I didn't mean to use the word cost. I just...

    I didn't mean to use the word cost. I just wanted to clarify that with the refrigerant out, the labor to remove the factory filters should be reasonable. And I think you did confirm that.

    Thanks...
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    Thanks, JLADude. The refrigerant has already...

    Thanks, JLADude. The refrigerant has already been recovered from the system. They could not do a "pump-down" into the heat pump because they said one of the factory service valves would not hold.
    ...
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    Thanks, JLADude. The deposits are not black and...

    Thanks, JLADude. The deposits are not black and flaky, but look like fine sparkly dust suspended in an invisible spider web about 1/16" thick on the inside of the pipe.

    We are having a new...
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    Visual Signs Of Brazing W/O Nitrogen

    We're trying to determine if our original contractor used nitrogen during brazing.

    The air handler has been disconnected, and in the gas line near the original brazed joint there's a fuzzy deposit...
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    Thanks CT2 and Beenthere. That's about what I...

    Thanks CT2 and Beenthere. That's about what I figured. We'll just go with R22 for now. Can the leaky valves on the heat pump be easily replaced?
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    We are replacing our Trane TWE037 air handler...

    We are replacing our Trane TWE037 air handler with the TWE040 model because the 037’s coil is too small for our 3 ton XL19i heat pump. Our new contractor techs were back today to deal with the...
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    Thanks, BaldLoonie. That makes more sense. I...

    Thanks, BaldLoonie. That makes more sense. I was having trouble imagining that this air handler can’t go in both directions, since it shows up all over the place with Trane’s heat pumps (just not...
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    We’re replacing our variable speed TWE037E13FB1...

    We’re replacing our variable speed TWE037E13FB1 air handler with the TWE040E13FB2. Since we know that the 037 cannot be used with either Trane’s 2.5 or 3 ton XL19i model heat pumps, we’re trying to...
  19. Thanks mediaguy. I'm really thankful that these...

    Thanks mediaguy. I'm really thankful that these issues were clarified with everyone's help before we start making the choices on what we're replacing and what we're keeping.
  20. Special Ed, I'm not familiar with dynamic air...

    Special Ed, I'm not familiar with dynamic air cleaners. I'll do a search and see what I can learn about them. Thanks for taking the time to broaden our choices.
  21. Dash, you are absolutely correct about the air...

    Dash, you are absolutely correct about the air cleaner. I don't have my install and user's manual back, since the new contractor is still holding on to them. They're preparing their bid for...
  22. To Trane: thanks for the warning. I've been...

    To Trane: thanks for the warning. I've been getting a lot of hype about the Clean Effects filter from the Denver Trane office. They strongly encouraged me to upgrade to it from the electrostatic...
  23. Photo of utility room. Sorry for the imperfect...

    Photo of utility room. Sorry for the imperfect merge borders and angled perspective. The room is only 4 1/2 feet wide, so I couldn't get a straight on shot that would show much of the equipment....
  24. Dash, we do have the electrostatic filter with...

    Dash, we do have the electrostatic filter with high static pressure drop. We also have turning vanes in the return plenum. Our original contractor bid us a price on the plenums according to our...
  25. Thanks also to Kim, who snuck in there while I...

    Thanks also to Kim, who snuck in there while I was posting my reply.
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