Re: Noisy Hydro Flame (Atwood) Furnace Reply #25 – November 23, 2016, 08:22:17 pm Krush,Here is a quote from their brochure which makes it appear that there have been some significant design changes between the generations;QuoteThe New Atwood 2-Stage, Excalibur series furnace has been designed to be more efficient and quieter with a new burner and blower assembly. The new design has minimized the air tur- bulence in the blower housing. This removed the annoying fre- quency spikes, (see graph) and the overall noise with an increase in the airflow.Quote from: krush – November 23, 2016, 08:14:03 pmHere's the manual with all the common replacement parts http://manuals.adventurerv.net/Atwood-Mobile-Service-Training-Manuals-2007.pdf From what I see, the 2stage and single stage are the same but in the parts you mentioned (motor, fan wheels, gas valve, thermostat, boards). The wiring diagram shows it all and it makes sense.I need to pull my furnace apart to inspect the parts (hey, it's nearly 20 years old) and replace the fan. So, I'll order the spare parts and motor after I disassemble. Quote Selected
Re: Noisy Hydro Flame (Atwood) Furnace Reply #26 – November 23, 2016, 08:38:52 pm Quote from: Don & Tys (AKA acousticart) – November 23, 2016, 08:22:17 pmKrush,Here is a quote from their brochure which makes it appear that there have been some significant design changes between the generations;And here are the part numbers from the link I posted for the burner and heater element:34976 Heating Element ✗89-IIIDC ✗89-IIIAC ✗2540 2-Stage35491 Burner ✗89-IIIDC ✗89-IIIAC ✗2540 2-StageBlower wheel (squirrel cage), combustion wheel, blower cover are all the same part numbers for the 89-III and the 2540 2stage.So, while I don't debate what the marketing flyer reads (I saw that a long time ago), the illustrated parts manual gives other information. Logic and knowing good engineers like to use off the shelf components and beancounters don't want to make new stuff leads me to believe there aren't too many differences. Quote Selected
Re: Noisy Hydro Flame (Atwood) Furnace Reply #27 – November 23, 2016, 09:42:56 pm Well the text of the brochure would appear to be a deliberately misleading attempt to promote their "new" product, if the part numbers you posted are not a mistake on Atwood's part. These two facts appear to be mutually exclusive. Heck, they even include graphs illustrating the difference! The only thing I can think of that might acquit Atwood of outright false advertising if the blower parts are the same would be if the sheet metal plenum that surrounds the blower assy has been be redesigned to reduce turbulence and noise. I will be interested to see the results of your experiment! Are you going to be at the "Lemon Rally" at Quartzsite?DonQuote from: krush – November 23, 2016, 08:38:52 pmAnd here are the part numbers from the link I posted for the burner and heater element:34976 Heating Element ✗89-IIIDC ✗89-IIIAC ✗2540 2-Stage35491 Burner ✗89-IIIDC ✗89-IIIAC ✗2540 2-StageBlower wheel (squirrel cage), combustion wheel, blower cover are all the same part numbers for the 89-III and the 2540 2stage.So, while I don't debate what the marketing flyer reads (I saw that a long time ago), the illustrated parts manual gives other information. Logic and knowing good engineers like to use off the shelf components and beancounters don't want to make new stuff leads me to believe there aren't too many differences. Quote Selected
Re: Noisy Hydro Flame (Atwood) Furnace Reply #28 – November 23, 2016, 10:09:44 pm There may be some difference. But my concern isn't really if there is a difference. I just wanted to make sure that the unit will work if I slow the fan speed down and reduce the amount of gas going to the burner. Since I will use the same: motor, fans, burner, exhaust, gas valve, and orifice.....I hopefully can get a desirable result LOL. Worst case, I put original stuff back in.I don't think I'll get to Quartz anytime soon....it's a long way from the EastCoast. Florida is more likely to visit friends and escape the cold. Lots of other projects around the homestead, though...the RV is just one of many attention needing mechanical toys. Quote Selected 1 Likes
Re: Noisy Hydro Flame (Atwood) Furnace Reply #29 – November 24, 2016, 01:59:35 pm While the part numbers may be the same ALL the parts might be updated? Quote Selected
Re: Noisy Hydro Flame (Atwood) Furnace Reply #30 – November 24, 2016, 02:48:41 pm Quote from: Caflashbob – November 24, 2016, 01:59:35 pmWhile the part numbers may be the same ALL the parts might be updated? From what I've seen, when the part number is updated (superseded), the parts suppliers automatically give the new part number and list all the old part numbers it replaces. Quote Selected
Re: Noisy Hydro Flame (Atwood) Furnace Reply #31 – November 24, 2016, 10:42:59 pm I did notice on mine the fan went from metal (old) to plastic (new). I remember reading somewhere Atwood claiming that was a benefit. Plastic weighing less would help the motor last longer and have less vibration. Sounds like marketing speak to me. see yaken Quote Selected 1 Likes
Re: Noisy Hydro Flame (Atwood) Furnace Reply #32 – December 08, 2016, 07:05:27 am Bryant RVs Hydro Flame manual covers all models - incl the digital thermostat http://bryantrv.com/docs2/docs/hflamefurn04.pdf Quote Selected 2 Likes
Topic: Noisy Hydro Flame (Atwood) Furnace