Ask Experts Questions for FREE Help !
Ask
    rocket81's Avatar
    rocket81 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jun 21, 2008, 11:06 AM
    Wiring a Honeywell RTH230B
    I just bought the Honeywell RTH230B to replace my old Tempstar T874 thermostat. I have 6 wires connected to the old one labeled R Y W G B O. The new one only has up to a 5 wire connection. My furnace and air conditioner are both electric. I found the wiring diagram to the old one, but I don't know where the old one goes. Here is the layout for the old one.
    B- Heating Damper Motor; Changeover valve
    W- Stage 1 heating control
    G- Fan relay coil
    R- Power connection to transformer
    O- Cooling Damper Motor; Changeover valve
    Y- Stage 1 Cooling Control

    The new one
    RH
    RC
    Y
    W
    G

    Any help would be great, thanks.

    Honeywell
    http://customer.honeywell.com/Techli...0s/69-1800.pdf

    Tempstar (Pg 9)
    https://estore.industrialcontrolsonl...485%5B2%5D.pdf
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jun 21, 2008, 01:32 PM
    The thermostat you have will not work for a 2 stage heat pump system.

    It does not have a change over provision.
    rocket81's Avatar
    rocket81 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Jun 21, 2008, 01:40 PM
    Any suggestions on a programmable thermostat that would work?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Jun 21, 2008, 02:48 PM
    Any 8000 series Honeywell. OR a good quality thermostat that will have a two stage heat set up.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Wiring for Honeywell RTH230B [ 1 Answers ]

I have a 3 wire zoned heating system, and trying to install the Honeywell RTH230B programmable thermostat. I removed an old Honey well thermostat and the terminals so old I couldn't make out the terminal identifiers. Currently I have 4 wires exposed in my wall Red Yellow Black Green. Can someone...

Honeywell RTH230B thermostat wiring [ 1 Answers ]

I'm trying to install a rth230B, but my wiring connection choices do not match up with my current T-stat wires. Note: My current digital T-stat is a power sharing model (ie. no batteries) and the rth230b uses batteries, so I have that difference right out of the box. I have a single stage gas...

Wiring Honeywell RTH230B [ 6 Answers ]

The wiring out of my wall for my thermostat is Blue, Red, Green, Yellow, and white My old nonprogrammable thermostat's wiring was connected by C (blue),R (red),G(green),Y(Yellow),W(white) My new Honeywell RTH230B has connections for Rh, Rc, G, Y, W

Honeywell RTH230B - wiring [ 2 Answers ]

I'm installing the rth230b on a 3 wire gas fired boiler. The wires are blue, red, white. On the old mercury stat the blue and red wre on the same post. Anybody know how I should wire this one? Thanks! Mike

Honeywell RTH230B Wiring [ 2 Answers ]

I have an existing Honeywell non-programmable thermostat with 2 wires, a white and black. I 'd like to replace with the RTH230B programmable. After reading the Reader's Digest Do-it-Yourself book, it says I would need to add wires if I wanted to replace a non-programmable thermostat with a...

View more questions Search