[mrdodge]

Just seen White Rodgers offers one of these (47D01U-843). Stopped by Emerson's website to view the installation and ended up confused. I'm uncertain if this will change my timed Goodman HP into Demand or is it just another timed board for Goodman and Carrier?
Thanks and Any Response welcomed

 

[supers05]

Those boards are the $*** son... Seriously, they are universal replacements. They do timed AND demand defrost, along with a host of other options. I believe it comes with all the sensors needed.

Cheers!

 

[bfletcher7]

I bought that defrost board a couple weeks ago. It works on my Lennox XP13 HP, just fine so far. As Super05 stated, it is user-configurable to allow timed OR demand control along with various other options that you probably saw while on their web site.

I have a little OCD and I started with the OEM choice 3 and then changed a couple values to override that OEM setting... don't do what I did a couple times where I went back in the settings to verify that my choices were retained in memory; if you go back to the "OE" setting to verify where it is set you will then reset any other values that you changed because the control will reset to the default OEM values whenever you go to that option setting. Good luck!

 

[mrdodge]

Thanks guys for the follow up, Fletcher thats where I'm confused. Page 4 has you enter the manufacturer code (#2 for Goodman) with its default values listed which leads me to think timed is the only option. However, page 5 has the manu. codes again with timed/demand selection in the next step. I just don't know how to interpret it. Thanks Again!

 

[bfletcher7]

I'm not a HVAC specialist--and I agree I am confused as to why they default to T/T for Carrier and Goodman--but I can say that when I chose 3 for Lennox I was able to change from the default of demand to T/T and for curiosity sake I did set it there for a few hours and confirmed it worked as T/T before changing it back to demand. If necessary, you could call Tech Support at 888-725-9797. I had an initial question and called them. They were quick to answer but had to call me back, which they did within a few hours. Something else I am wondering about is if this resets to default values when power is lost. I could check it easily enough, but I have not done so yet.

 

[mrdodge]

No pro here either, but been around it enough to know timed defrosts even at 90 minutes can waste some $$$ over time. Thats what got me on this search. Monitored my HP runtimes Saturday a constant 25* outdoor temp at timed 90 minute defrosts I used $1.12 in strip energy in 24 hrs. just for defrost.
Over 10 yrs. thats a few bucks. That support #'s a life saver. I'll speak with them and try to mention your ? on power loss. Thanks Again

 

[mrdodge]

Fletcher, as you I'm currently waiting on a call back. I reread your post and feel since your Lennox would do both timed/demand it only makes sense it should control a Goodman the same. Talk to you soon.

 

[bfletcher7]

Good luck! I'm new to the sight but I've seen helpful, informative answers from people like Bob Sanders and beenthere... perhaps they will see your post soon.

 

[Done That]

You don't have to pick an OEM during setup...simply use #8 (factory default) and you'll get Demand Defrost. That said, even if you do pick an OEM ,#1/Carrier for example...then you can switch the defrost type to Demand if desired. Some folks don't want to change things, so that is the reason for the OEM standard/defaults...but any available parameter can be changed even after defaults are loaded.

Settings are stored in EEPROM and NOT lost during a power loss.

 

[mrdodge]

super05 probably nailed it out of the gate by saying they do both. I just hope for any unit. If your unit will program to either timed/demand I feel certain others will also.

 

[bfletcher7]

Thanks!

 

[mrdodge]

Done That just posted what I needed to see/hear, leaving to: Buy It Now.
super, Fletch & Done Thanks so Much!

 

[mrdodge]

Whew,,,,so happy Done That chimed in! The return tech call did not go well. Very polite individual but not tech savvy at all. Just said enter OEM# and unit would work as it should. I agreed with that.
Could not for the life of me after several attempts to relay that I do not want it to work as it did/should. He never really understood the difference between timed/demand cycles.
Its a done deal, it'll be here Friday. Thanks to everyone for your interest!

 

[Done That]

Whew,,,,so happy Done That chimed in! The return tech call did not go well. Very polite individual but not tech savvy at all. Just said enter OEM# and unit would work as it should. I agreed with that.
Could not for the life of me after several attempts to relay that I do not want it to work as it did/should. He never really understood the difference between timed/demand cycles.
Its a done deal, it'll be here Friday. Thanks to everyone for your interest!

Thanks for your patience. I'll alert the Support folks so that they are clear on this for the next caller.

 

[mrdodge]

Thanks for your patience. I'll alert the Support folks so that they are clear on this for the next caller.

That would be a gr8 business move for White Rodgers. I'm sure pros and techs in the business are very aware of the boards parameters and possibilities.
But, as for an energy conscience self supportive homeowner as myself if the only information I had was from the tech support line I'm sure I would not have purchased it.
Also, the instructions hung me up a little. Page #4 specifically, leads the layman as myself to believe this is a replacement timed board for Carrier/Goodman or a Demand board for all others. But, page #5 clearly gives the Timed/Demand option for any system I assume? I may have just been overthinking it all though!
It all worked out, thanks again for the support!
I must be getting old, who else gets pumped up over receiving a NEW DEFROST BOARD !!!

 

[Bob Sanders]

One quick question about those boards for those who may know....

Can you customize the temperature points of the sensors which trigger defrost or is it an unchangeable algorithm used?

 

[bfletcher7]

ET (Enable Temp for defrost) is adjustable to 30, 31, 32, 33, 34, 35, or 36 degrees. TT (Terminate Temp) is adjustable to 50, 60, 65, 70, 75, 80, 90, 100 degrees. Other parameters are also adjustable.

Here's a link to the owner's manual: http://www.emersonclimate.com/Documents/White-Rodgers/instruction_sheets/0037-7526B.pdf

 

[bfletcher7]

I hope Dodge doesn't mind me asking on this thread but perhaps it will be helpful to him, too. When utilizing a demand configuration is it possible for you experts to offer some indication of performance degradation a user can expect before a defrost is initiated? As a layman, I relate to a register temp (nearest the handler) rather than, say, DT.

After a couple weeks' usage I'm still repositioning the coil sensor periodically but an example from yesterday over a 5 hour span with a constant outdoor temp of 36 my register temps gradually decreased from 105* to 97* before a defrost was initiated. In my feeble mind that seems significant. Can you comment based on this little detail?

Also; this controller (47D01U-843) offers a user-selectable coil temp setting ranging from 30* to 36*. Is my assumption correct that a setting of 36* will initiate sooner than 30*? Or is that setting based on a temperature difference? Actually that raises another question because here in Ohio in winter months isn't my coil always lower than 30?

Thanks for any help you can provide!

 

[mrdodge]

Hi Fletch, good to hear from you! I just read your post and that is a very impressive temp rise. Could your air handler have an ECM (variable speed) motor? The reason I ask is really thats too much DT at 35* outdoor. At 400 cfm per ton heating my 2.5 ton unit produces a 20* DT @ 35* out. If your stats at 72* your in the 30* temp rise range. I'm sure each manu. varies but I wouldn't think that much.

 

[Bob Sanders]

That DT does sound a little high. Sounds like the fan is running too slow.