How does AUX Heat turn on ? ( heat pump )


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Old 03-04-07, 08:42 PM
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How does AUX Heat turn on ? ( heat pump )

Just put in a new Honeywell Focus Pro6000 on a 10 YEAR OLD rHEEM Heat pump with AUX heat coils--
The Heat pump is working so it may be hooked-up right.

But how do I test to see if the AUX ( second stage Heat is working ) ?

I guess I am not sure how this AUX heat gets turned-on


The Old Thermo has AUX heat as well as a EMenergy Light ( think the EM light is the AUX plus compressor lockout ?? )

The new Thermo has a AUX Indicator ( never turns on ) -- and an EMengeency mode on the System selection ( but EM never shows up - so maybe I have a hook -up problem ? ) The old Termo seemed to go into AUX and EM on cold days -- by itself ? ( I know there were not any switches to cause this ?? )

Thanks
 

Last edited by coveredup; 03-05-07 at 04:21 PM.
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Old 03-05-07, 05:00 AM
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FocusPro does not have the Red LED light, the word "Auxdlity" should show up above "Heat On".

If it's not then sounds like it's set up wrong.
 
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Old 03-05-07, 05:08 AM
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WOuld AUX show up when the AUX heat is not on ???

I thought it would only show when on ??
 
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Old 03-05-07, 05:31 AM
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I've used these stat before. but never in heat pump, so I honestly don't know what should/n't be on the screen in Aux or EM mode..

In set up, what system mode do you have it into?
 
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Old 03-05-07, 09:09 AM
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"WOuld AUX show up when the AUX heat is not on ???"

The AUX would show up when the system is in defrost mode or if the heat pump is struggling to reach T-stat set point in extremely cold conditions. The second stage (AUX) temperature differential determines when it activates.
 
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Old 03-05-07, 03:39 PM
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In setup -- It is set for Heat PUmp which is Function 1 -- set to 1

On the Function 2 I have it set to 1 -- which is a B Wire used --


My wiring is as Follows to the HoneyWell Focus Pro 6000
My Heat Pump is a 10 yr old Rheem

HW
Themo----WIre color---was on

L----------Brown-----was on the X term on the old Themo ( LED ??? )
AUX-------White------was on W2 on the old ( STage 2 Heat )
B/o--------Blue-------was on B ( Reverse Valve ?)
G----------Green-----G Fan
R----------RED--------R 24V
Y----------Yellow------ Y ( cool /Heat )
E----------White----- Same white as on AUX-was on E ( looks like E or W2 turn on stage 2 heat )

so I have E and AUX bridged together -- this sound correct ??

Again with these connections --it doesnt look like Stage 2 heat is working

Thanks in advance for any ideas !!!!!!!!!
 

Last edited by coveredup; 03-07-07 at 07:12 AM.
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Old 03-05-07, 05:41 PM
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Wink

On lots of the H/P the defrost board will turn the Aux heat on when the unit goes over to AC for defrost. I dont know how your tstat is set to turn it on. lot of them will turn the Aux on when the heat pump cant keep up and the tstat drops like 1o then the AUX will turn on. You can check the elements with a meter or I like to use a Amprobe to see whats on and not on.
 
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Old 03-05-07, 06:14 PM
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Sounds like I may have to wait until next winter to test the AUX function ??

I think you are right the Defost may be turning on the AUX -- in which case it needs to freeze outside before I can test ?


Not sure what caused the EM light to come on before --- only it was very cold -- and may have locked out the Heat pump -- and run Stage 2 only ? May have hAD the drop in temp during operation that you refer to to turn on EM ?

The instructions in the Honeywell indicate Emerency Heat is a selection one can make from the SYstem selection options and does not appear to be automatic --- doesnt sound like the Honeywell can perform all the AUX and EM functions automatically supported ??

Would someone at Honeywell know ??


Is there somewhere that shows what the terminals on the Honeywell Therostats are ? --- really dont know for sure what the L and E contacts are for ??
 
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Old 03-05-07, 06:23 PM
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Wink

On most tstat The L is for light malfunction and E is for emergency heat
 
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Old 03-05-07, 07:55 PM
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OK -- hooked the old Themo back up and the AUX function goes on when I push the temp up about 5 deg above where the Heat Pump is started -- the heat pump continues to run -- so it must be running both stage 1 and stage 2 at the same time ---

So, it appears my wiring is not correct -for the new one-(never saw an AUX indicator-- but I wonder if a Honeywell Thermo kicks in AUX the same way ??-

anyone see my error (s ) above ?

I should also see if I can get someone at Honeywell -- there are several qustions in the setup -- that I do not have the documentation for --- 9,12,13,14,15,16,27,28

That might be another problem -- wonder why Honeywell doesn't publish the install info for this thermstat ??
 
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Old 03-05-07, 08:32 PM
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OK -- found the install manual on the internet

http://www.crescentparts.com/TechnicalResources/Files/63_TH6110%206220%20Installation%20Guide%20TH6220.pdf

Looks like I have the setup wrong -- need to use system Type of 5 -- 2 Stage Heat -- will try again


THANKS for the help

(it also has the Honeywell wiring diagrams in there )
 
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Old 03-07-07, 05:52 AM
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Got everything all set up allright?
 
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Old 03-07-07, 07:08 AM
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THANKS --- Had just put back Old one for now

Will go back to job on Friday ---


Looks like I will hook the E and AUX together and run back on the white

STill don't know about the Brown wire which was on the X term on the Old Thermo --- from reading it looks like this may be the Common side of the Transformer -- in which case could be connected to the C

But I will not hook - up initially ( just use Battery ) and put a meter on it -- with Red -- to see if it is grounded to common post

----of course I will set the Thermo for 2 stage heat pump this time--- which I think was the main problem before -- I had it set for one stage Heat-- ( may be why the AUX heat didnt come on -- dud )
 

Last edited by coveredup; 03-09-07 at 08:11 PM.
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Old 03-07-07, 07:17 AM
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Go back to the furnace and check to see where this brown wire lays on at the furnace's board.
 
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Old 03-07-07, 08:10 AM
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Wink

Most units that have X on them that is the common but best to check it out
 
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Old 03-11-07, 08:42 AM
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Thanks everyone -- got it

The X on the old Rheem is Common ( so running without Battery now ) and with Blue setup in the Setup for Heat at B/o

and the White for AUX and E ( bridged together ) -- The Honeywell is working fine


Honeywell needs to put their PRO line install instructions on-line -- did find them see above at another company site
 
 

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