Trane Gaf2 Service Manual
AIR HANDLERS Trane Heating & Cooling Systems Designed to condition and circulate the air, varying its speed based on your home’s heating and cooling requirements. It gives you a consistent level of quiet comfort and saves energy in the process. Smart technology for better air from a trusted name, Trane.
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Hyperion XL Air Handler Variable-Speed Air Handler Helping to circulate better air, the Hyperion™ XL variable-speed air handler is built unlike anything the market has ever seen. For one thing, it’s constructed more like a refrigerator, with insulation between the double walls of the uniquely designed cabinet.
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I just got a new 2 ton Trane system for our upstairs. The air handler is a Hyperion (GAF2 series). I have a few issues I'd like to run past the pro's for comments. This system in a vertical installation in a walk in attic and has a strip heater installed. 1.) This system is louder than the old contraction grade Carrier system it replaced. Seems to be moving more air and/or the air is more turbulent and causing more noise. 2.) When the system turns on, the contactor (relay) is really loud.
Sounds like someone is closing and latching one of the doors upstairs. When my wife heard it she thought someone was actually upstairs. 3.) It leaks a considerable about of air around the middle door that covers the coil. Specifically around the point where the condensation drain exits. The build quality of both the inside and outside units seems very good, but I'm not happy that the system is louder than lesser quality system is replaced. The loud contactor is probably the most annoying, but the added 'air noise' isn't too pleasant either. The air leak could obviously be fixed with some foam and tape, but it would sure look cheesy to put foil tape on a system that tries to look so good (not the end of the world I know).
From reading the installation guide, looks like the unit ships from the factory with the fan motor set up on tap 2 (medium speed). My thought was to lower the fan speed, but I read in the installation manual that you're not supposed to do this if the unit has a heater installed. Is this correct? Any chance the installer would have set it up for tap 3? Any advice would be appreciated. Are there any service bulletins on the contactors? From reading other threads it seems there are some on the door leaks.
The installer obviously never has to service units, and/or hates service techs. The return opening is a problem. The whole return setup looks like it was designed to transmit and amplify as much mechanical and air noise as possible.
It certainly is doing a bang up job of amplifying and transmitting sound as you say. What can I suggest to improve the situation?
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Should the installer be able to open up the return hole with the handler installer (without mangling it up) or does the handler need to come off first? It seems to me like that small hole and the way the air has to turn to the left and right to enter is probably making higher velocity and highly turbulent air and therefore noise?
Any thoughts on the loud contactor? Looks like they have a metal pan in bottom of box, with float switch in it. GAF/TAM/GAM was not the best air handler for this set up. Minimum fan speed depends on heater kit size, and not much you can do about air leakage if doors are on correctly with out taping, as this unit pressurizes the cabinet. There was a Trane service bulletin about ways to dampen noise in vertical/closet setups. Besides the opening size, talk to contractor about putting in a plastic overflow pan and some type of insulation (although i dislike fiberglass on inside of ducting) maybe styrofoam eggcrate padding or some such on inside of return box to cut down on noise. Quick Navigation.
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