Honeywell Thermostat E/AUX Connection

davidpjNovember 12, 2012

Hello,

I'm replacing a Honeywell VisonPRO 8320U1008 with a Honeywell VisionPRO TH8321U1097 on my 2H/1C heat pump and I discovered that the E and Aux terminals are now combined into a single E/AUX terminal on the new thermostat. The thermostat that's being replaced has a black wire on E and a white wire on Aux.

I'm thinking of attaching both wires to the single terminal, or, leaving off the black Emergency heat wire.

The thermostat is in a basement zone off the main system. I don't think I'll ever have the need for aux or emergency heat in the basement.

Can you please suggest how best to configure this new thermostat for proper aux and emergency heat? Thanks.

Thank you for reporting this comment. Undo
zl700

Almost impossible to answer without knowing what's connected at the other end.
While often aux and emergency were the same heat source, the second stage, sometimes had a bypass to operate the aux if there was a system problem or you manually switched to emergency to bypass the first stage.

It may work putting wires together in conjunction with some advanced installer settings on the stat, but wiring and operation would need to be known on the system end.

    Bookmark   November 22, 2012 at 12:41PM
Sign Up to comment
More Discussions
HVAC design
In determining the HVAC system to use in our new construction,...
bethmcg
I need help in deciding on a replacement central air conditioner
I need help in replacing 38 year old 1 1/2 ton 8 Seer...
Doricee
Honeywell th6320R Thermostat
My Honeywell TH6320R thermostat (communicating with...
zver11
Who do I call about a whole-house fan?
I'd like a whole house fan. This might be a DIY project,...
elofgren
Moving house AC unit
Hopefully this all makes sense. In our potential kitchen/house...
Jennifer Weinman
Sponsored Products
Pre-owned 18" Vintage Lampshade Chandelier- Small (3 Bulb)
$520.00 | Chairish
Nurseryworks | Empire Rocker
YLiving.com
Wrought Iron Chair Outdoor Patio + Free washable cushion - DIAMOND
Living'ROC
Safavieh Old World OW115E 2'6" x 8' Light Green, Rust Rug
$700.00 | PlushRugs
Beckett Oil Rubbed Bronze Three-Light Kitchen Chandelier
$53.50 | Bellacor
Heat Storm Deluxe Wall Heater - HS-1000-WX
$179.99 | Hayneedle
Arch 14-3/4 inch Cabinet Handle Bar Pull Stainless Steel Finish
eModern Decor
Melody 3Lt Wall / Bath with a Chrome Finish
PLFixtures
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™