Re: [MBZ] OT: Heat Pump Defrost Setting
Kaleb C. Striplin via Mercedes wrote: How do I know if my 3-4 year old rheem has smart defrosting? I suspect it does because I think I have only noticed it go into defrost maybe 1 time. Probably all the Rheems/Ruuds had it by 3 years ago. That company likes demand defrost as much as Amana/Goodman hates it. I seem to recall you posting a pick of the ID sticker. With a little Google-Fu you should be able to find the installer's manual for your model number. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] OT: Heat Pump Defrost Setting
How do I know if my 3-4 year old rheem has smart defrosting? I suspect it does because I think I have only noticed it go into defrost maybe 1 time. Sent from my iPhone > On Jan 11, 2015, at 9:38 AM, Mitch Haley via Mercedes > wrote: > > There is no single good setting. If you're home all the time, set it for > maximum interval, get a reset button from an old computer and plug it onto > the 'defrost test' terminals on the defrost control board. If it ices up, go > outside and push the button. > > I think my Goodman came from the factory at 30 mintues, as usual the choices > were 30 (waste of energy), 60, and 90. I set it at 90, but still had several > unnecessary defrosts a day in most weather, and if it was 34° and foggy > outside it got horribly iced up, looked like a wedding cake. > > For me, the only acceptable solution was a demand defrost board. > A HVAC pro who upgraded his personal system told me I needed a Nordyne / > Partner's Choice 917469 board. I bought one on the net for about $75 and > found out it didn't come with temperature sensors. Furthermore, neither my > eBay seller nor the local Nordyne distributor had the sensors. I had my local > family owned (my dad's cousin, probably should have gone to him in the first > place) HVAC shop order it, and two weeks later I was in business. Had to > drill a new mounting screw hole because the Nordyne board was not exactly the > same size as the board Goodman used. A little experimentation with > positioning the coil temp sensor and I now have a smart heat pump that > defrosts when it needs to defrost, or defrosts every 385 minutes if no > defrost is needed (something about helping to return oil to the compressor). > > You can get Rheem boards, complete with sensors, for $40-50, but Rheem > reversing valves are normally cooling, you apply power to engage heating > mode, where most every other valve is normally heating and you apply power to > shift it into cooling mode. Therefore you have to do some rewiring to make a > Rheem board work on a Payne. > This forum thread tells you how: > http://www.diychatroom.com/f17/retrofit-demand-defrost-goodman-clpt42-129571/ > http://www.diychatroom.com/f17/retrofit-demand-defrost-goodman-clpt42-129571/index3/#post1119213 > > http://www.comfortgurus.com/en/protech-hvac-service-parts/95966-rhe-47-102685-86.html?search_query=47-102685-85&results=4 > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > All posts are the result of individual contributors and as such, those > individuals are responsible for the content of the post. The list owner has > no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] OT: Heat Pump Defrost Setting
There is no single good setting. If you're home all the time, set it for maximum interval, get a reset button from an old computer and plug it onto the 'defrost test' terminals on the defrost control board. If it ices up, go outside and push the button. I think my Goodman came from the factory at 30 mintues, as usual the choices were 30 (waste of energy), 60, and 90. I set it at 90, but still had several unnecessary defrosts a day in most weather, and if it was 34° and foggy outside it got horribly iced up, looked like a wedding cake. For me, the only acceptable solution was a demand defrost board. A HVAC pro who upgraded his personal system told me I needed a Nordyne / Partner's Choice 917469 board. I bought one on the net for about $75 and found out it didn't come with temperature sensors. Furthermore, neither my eBay seller nor the local Nordyne distributor had the sensors. I had my local family owned (my dad's cousin, probably should have gone to him in the first place) HVAC shop order it, and two weeks later I was in business. Had to drill a new mounting screw hole because the Nordyne board was not exactly the same size as the board Goodman used. A little experimentation with positioning the coil temp sensor and I now have a smart heat pump that defrosts when it needs to defrost, or defrosts every 385 minutes if no defrost is needed (something about helping to return oil to the compressor). You can get Rheem boards, complete with sensors, for $40-50, but Rheem reversing valves are normally cooling, you apply power to engage heating mode, where most every other valve is normally heating and you apply power to shift it into cooling mode. Therefore you have to do some rewiring to make a Rheem board work on a Payne. This forum thread tells you how: http://www.diychatroom.com/f17/retrofit-demand-defrost-goodman-clpt42-129571/ http://www.diychatroom.com/f17/retrofit-demand-defrost-goodman-clpt42-129571/index3/#post1119213 http://www.comfortgurus.com/en/protech-hvac-service-parts/95966-rhe-47-102685-86.html?search_query=47-102685-85&results=4 ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] OT: Heat Pump Defrost Setting
Probably just a jumper on the control board, Google is your friend. More Google work should reveal what the recommended settings are for your area. There is always trial and error... Max Dillon, Charleston SC ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
