How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask airheatman Your Own Question
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 7713
Experience:  Furnace, A/C and heat pump specialist.
16514686
Type Your HVAC Question Here...
airheatman is online now
A new question is answered every 9 seconds


, I have a RUUD UBHC-14J11NFD which I'm hooking up to a

Customer Question

Customer: ***** *****
JA: Thanks. Can you give me any more details about your issue?
Customer: I have a RUUD UBHC-14J11NFD which I'm hooking up to a Nest thermostat, replacing an old Honeywell t-stat. Have a question on the wiring.
JA: OK got it. Last thing — HVAC Technicians generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 10 months ago.
Category: HVAC
Customer: replied 10 months ago.
Wiring on Honeywell unit is:
Green -> G
Red->R
Blue->B
Yellow->Y
White->W2
Brown->XI assume this is a heat pump model correct?
Is the X acting as a C in this wiring?
Expert:  airheatman replied 10 months ago.

Can you give me model on old stat. Some of the old Honeywells used X as emergency heat and some used it as common.Also provide model on your outdoor unit

Customer: replied 10 months ago.
Old stat is a RUUD 41-20804-16. Unit under the UBHC-14J11NFD is a Rheem RCBA-2457G
Expert:  airheatman replied 10 months ago.

Model on outdoor will tell me right off if this is a het pump if you can give me that

Customer: replied 10 months ago.
My mistake on calling old stat a Honeywell, as above it's a Ruud stat.
Expert:  airheatman replied 10 months ago.

One more quick question on stat,did it have an E terminal?

Expert:  airheatman replied 10 months ago.

OK I found it,The answer to your question is YES the X was Common so it will go to C on the Nest!

Customer: replied 10 months ago.
Ok, outside unit is Ruud UPKB-024JAZ.
O, L and E are empty terminals on old stat
Customer: replied 10 months ago.
Can you confirm correct wiring to Nest 1st gen unit. Is system have dual heat sources and is Nest Pro setup needed?
Expert:  airheatman replied 10 months ago.

By dual heat do you mean gas backup?

Customer: replied 10 months ago.
I think you answered it for me. Nest wants to know if it uses a heat pump with a furnace, I guess the answer is no.
Expert:  airheatman replied 10 months ago.

The answer is no if you have electric backup strips.

Related HVAC Questions