Question about Ruud UBHC Air Conditioner

2 Answers

24v wiring for RHEEM heat pump

I need help determining where the wires go:

Brown wire (labeled COM)
Blue wire labeled 24VAC
Yellow wire labeled HLD
a purple wire that comes off of the Defrost relay, withno label

I am assuming the Blue goes to 24v Red on furnace
not sure about COM, HLD or the purple wire. Please help.

Thanks.

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Brown wire connect to com C on terminal block in your furnance (0VAC from 24VAC transformer)
Yellow turn on compresor (hot wire from 24VAC Transfrormer)
Blue switch Valve from AC to Heat (hot wire from 24VAC Transfrormer)
Purple prevent starting compressor in Heat pump and furnace in same time

Posted on Aug 28, 2009

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 24 Answers

A heat pump with a gas furnace needs to have a fossil fuel kit instaaled to work properly. i reccomend you call a local professional.

Posted on Aug 09, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I am trying to install a Honeywell RTH2300B thermostat. I can't get the wiring. I have a red, blue orange, green, yellow, brown and white wire and B, O, G, Y, W, Not Used, R, and RC terminals. Can


what type of system are you wiring it to???? for general info b and o are used if heat pump system, g =fan (blower), Y =cooling (ac), W=heat, R and rc are 24v feed to stat, do not use rc if system does not have cooling. if it does and 24v is from one source then connect fed to r and install jumper between r and rc . you list wire colors you must identify where they are connected at other end.

Nov 16, 2012 | Heating & Cooling

1 Answer

I am trying to install the new tx900ts in my house and i do not understand the wiring on it i have a old trane thermastat that has different wiring codes


PLEASE GIVE ME A RATING AND VOTE YOU NEED TO FIGURE YOUR WIRES WRITE IT ALL DOWN AT UNITS AND THE OLD STAT
common is different by installer so you gotta look at the units or you will blow out your transformer this wire will be blue or brown
24v always red
compressor always yellow
fan always green
reversing valve always orange
heat w1 always white
emergency heat will be either brown or black dependinting on installer if its a heat pump this it what you have but if its a gas system its much easier
red- 24 volt with a jumper already on the new stat
white- heat w terminal
yellow- cool y termina
fan green- g terminal
and common is optional with batteries so its not needed
if you need further help email pendletonheatandair@hotmail.com

Sep 20, 2010 | Heating & Cooling

1 Answer

Phkj036 auxilliary heat does not produce heat in cold weather. It just blows cold air.


You have to be sure you are getting 24vac to the white wire from the thermostat. Put thermostat up more than 5 or 6 degrees higher than the room temperature and then check at the unit to see if you have 24v from W to C. If you have 15 or 20kw of heat, you should also have 24v on the brown or W2 to C. If you do not, and you do have them wired at the thermostat, there is a problem with the stat. Either it is not set up in the advanced parameters for aux heat, or it is just bad. If you do have 24 on W and or W2, then you have to check the sequencers in the HK heat kit. Use an amp clamp to see if any of them are actually pulling amps. Then, check to see if you are getting power to the sequencers...that would be 24v between the blue and white on sequencer 1 and between brown and white if you have a second sequencer. If you do and the elements are not pulling amps, you have to determine if the sequencer is closing or if the element, thermal limit or fuse link is bad.

Jan 03, 2010 | Goodman PHKJ048-1 Air Conditioner

1 Answer

I replaced a Lennox DSL-450LX heat pump thermostat with a Honeywell RTH3100C. Everything works except the gas does not ignite when set to emergency heat. The Lennox was wired as follows: W = white wire Y1...


Hi, If indeed you do have a heat pump, there wouldn't be any gas involved as a heat pump runs on freon with a reversing valve and heat strips for aux and emerg. heat. For gas electric operation thermostat terminals are rc to rh with factory jumper. Red wire to either.W to W for Heat, Y to Y for cooling G to G for Fan. If you have a blue, you wont need it unless this is a commercial stat useing a common for the Led lights on the stat. The unit will get its 24volts through R terminal in combination with y,w,and,g. Cant be a heat-pump if you have a gas furnace.Wrong t-stat. You need a gas /elect stat. And on a 24volt programmable t-stat, the batterys are used for the program only.If the batterys die, than you will loose the program on most residential stats. On commercial stats with the common in play, when batters die the stat defaults back to the factory settings.If you had a Lennox heat-pump stat on a gas/elect unit, you need to change it. Someone was using what they had on hand. Let me know if this has helped you.I will be here if you need me. Sincerely,
Shastalaker7

Nov 17, 2009 | Air Purifiers

1 Answer

I need wiring manual for goodman mini split.


outside unit L1 and L2 are load (input 240vac)
then you have control voltage, usually yellow and blue (24vac) this connects to some 18/2 thermostat wire which goes inside as white and red.

note: this unit may only need 24v control which is 2 wires from the inside unit and also 3 wires 2 hot 1 ground for line voltage.

STANDARD WIRING
on the inside unit you have green, white, blue and red control wires.

on your thermostat you have white, red, yellow and green

you run the wire from the outside unit to the inside unit. then run a 18/4 wire to the thermostat if wired and join the following wires.

inside unit thermostat outside unit
green------------------------green
white-------------------------white
red----------------------------red
blue-------------------------------------------------------blue
yellow--------------------yellow

Oct 08, 2009 | Heating & Cooling

1 Answer

Trouble Wiring in Rheem heat pump


The red wire goes back to the furnace red, the blue back to the thermostat blue, the brown back to the furnace C terminal, the yellow back to thermostat Yellow (if there is a Y terminal on that furnace, land your Y's there. The purple wire outside comes back and ties to the W terminal on the furnace. Now you have a dual fuel unit so you will need a dual fuel kit or a thermostat that has dual fuel capability along with an outdoor sensor.

Jul 02, 2009 | Ruud UBHC Air Conditioner

1 Answer

Wiring match-up


If this is a standard heat cool unit. You have a tstat with rygwcob. Just color code the wire to the unit. Some air handlers such as Rheem and carrier use different collors for there common Carrier black Rheem or Rudd Brown. Two wires that go outside use yellow blue. Yellow to Y fron Tsta and blue to common or blue,blavk or brown.or C

May 30, 2009 | Heating & Cooling

1 Answer

I need a wire diagram of a central heat and air with a heat pump


W- White (heat)
Y- Yellow (condenser)
G- Green (Indoor fan)
C- Blue (Common 24v)
R- Red (24VAC)
O/B (Only needed if system is a heat pump)

May 07, 2009 | Honeywell Heating & Cooling

1 Answer

I have a carrier air/heating unit with pump. It has 8 wires. Brown,blue, white, yellow, green, black, orange,and red. I'm trying to install honeywell thermostat. The wires from my unit are suppose to go...


Turn the power off to the air handler. Open the control cover. Write down what color wires go together at the wiring terminal. All 8 wires are probably not used.
Post the findings here.
In most cases,
E= brown-emergency heat
AUX=white-auxillary heat to supplement HP
Y= yellow-to compressor for heat or cool(hp)
G=green-indoor fan
O-orange-reversing valve on HP when energized in COOL
L=t-stat light(probably not used)
R=red-24v incoming power
B=black-reversing valve on HP when energized in HEAT
C=blue-common wire for 24v
Only one of the "O" or "B" will be used. Not both.

Apr 27, 2009 | Carrier Heating & Cooling

Not finding what you are looking for?
Ruud UBHC Air Conditioner Logo

1,686 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ruud Heating & Cooling Experts

Donni Steen

Level 3 Expert

659 Answers

Bill Long

Level 3 Expert

587 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Ruud Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...