Upgrading Goodman (HTP18-60w) to Honeywell (RTH2310)


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Old 01-15-11, 03:38 PM
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Upgrading Goodman (HTP18-60w) to Honeywell (RTH2310)

Goodman Therm Connections - Model HTP18-60W
Y - Green wire
G - (open)
R - Red wire
O - Yellow wire
E - (open)
C - Blue wire
W2 - White wire

** Here is first problem... when this therm was hooked up, the Fan (ON/Auto) was backwards. ie. place on Auto the fan ran full time, place on ON it cycled w/ the furnance as it should on Auto. I assume 2 wires were originally mixed up, but don't know which ones.

Honeywell Therm Connections - Model RTH2310
Rh - Jumpered to Rc
Rc - Jumpered to Rh - Connected Red wire
W - White wire
Y - Green wire
G - Yellow wire

Blue wire was terminated per manual. And jumper was changed inside for electric furnance.

Here are the issues:
1. Fan ON does not turn on the fan. Furnance operates fan in Auto position.
2. Air from vents appear to be lower. ie fan not blowing at full speed.

Temperature sensor appears to be fine, funanace turns on and off as it should. AC turns on, but am unable to run for any period due to our current outside temps. My furnance is a Intertherm, and yes, this is a manufactured home. Any assistance you can provide would be greatly appreciated.
 
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Old 01-15-11, 03:49 PM
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Is this a regular gas furnace with A/C?

You may have to take the cover off the furnace, and make notes of what colored wires are going to what letter there.
 
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Old 01-15-11, 04:20 PM
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Please bare with me on this... this is a mess handed to me, hoping to straighten out...

Furnace connections:
(Connection to the furnace is a 6 point plug with 4 wires.) Someone wire nutted the wires from the condensing unit (unit outside), Thermostat, and Furnace.

Wires from the plug attached to furnace:

Red - Tied to the Red wire from Thermostat, and Condensing Unit.
Green - Tied to Yellow on Condenser and Green on Therm.
White - Tied to White on both Condenser and Therm.
Grey - Tied to Blue on both Condenser and Therm.

The Green wire from the Condensing Unit is tied to the Yellow wire from the Thermostat. Neither wire is tied to the furnace.

The furnace is a Intertherm furnace Model E2EB-17HC - This is a totally electric system, no gas.

Thanks
 
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Old 01-15-11, 04:39 PM
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Does original stat have Emergency heat function? If so the new one needs to be for HP and have 2 heat 1 cool function

ok. COLOR : STAT : AH : HP I'm assuming HP instead of regular A/C

RED : R : R : R
GREEN : G : G : NONE
YELLOW :Y : NONE : Y
ORANGE : O : NONE : O
WHITE : AUX AND E: W2 : W2
BLUE : C : C : C

Sounds like you have a real mess and need to start over.
 
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Old 01-15-11, 06:01 PM
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OK update...

Yes, previous Stat had Emergency heat.

And you have me totally confused.

Here is a link to the furnace I have:

http://www.nordyne.com/Literature/708172a.pdf

Off the Furance there are 4 wires (Red, White, Grey, Green)

Red wire is tied to both the Red from the Stat and HP
White wire is tied to both the White from the Stat and HP
Green wire tied to both the Green from the Stat and HP
Grey wire tied to both the Blue from the Stat (terminated) and HP

Yellow wire from Stat is tied to Yellow from the HP.

Furnace appears to run fine, motor speed back to normal.
Auto/On Fan Switch appears to function properly.

However, when I switch the unit to AC, the indicator (Snowflake) flashes. Unit does not turn on.

Questions:

1. Should the blue wire at the Stat be terminated, even though it is still hooked up to the furnace and HP?

2. Should the Green wire from the HP be terminated?

Again, appreciate your help.
 
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Old 01-15-11, 06:03 PM
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Do you have a Heat Pump or A/C?

if you switch directly from heating to cooling and the snowflake is flashing then you are probably in 5 min compressor lockout this is a stat function to protect the compressor in outdoor unit.

The wiring you listed this time looks much better and completely different then what was listed last time. You need to open up the outdoor unit so we know what the green wire from that unit is connected to.

Does your new stat have a emergency heat function? This type of thermostat is used with a Heat pump system with backup auxiliary heating
 
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Old 01-15-11, 06:15 PM
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Ok, Hope they take it back...lol

If I use the old one for now, are these the correct wiring?

Therm / Furn / HP

Y - Green / g / open (terminate green from HP?)
G - open
R - Red / r / r
O - Yellow / none / y
E - open
C - Blue / grey / blue
W2 - White / w / w

Old Stat is an old merc type, was just looking to upgrade. Still worked.

Can you recommend one, or explain what I might be looking for in the store. The one I got came from Lowe's.

TY

EDIT Ok now I am lost... can i use this Stat or not ??
 
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Old 01-15-11, 06:22 PM
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this is what doesn't make sense...... your not using all the correct wires so you need to open up the outdoor unit to see what the wires go to.

NO the wiring does not look right! I think you need to start over.

DO YOU HAVE A HEATPUMP OR CONVENTIONAL A/C?

If you have a/c then yes you can use the new stat you bought.
 
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Old 01-15-11, 06:40 PM
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Honestly I don't know what I have ...

It's a Payne Model PH12NAD48-B unit outside... naturally it's wired tight to my deck and there is no way I can gain access to the panel at this time to view the control wires coming in.

I did turn on the A/C this time. (Had the full unit off over 5 mins.) It fired right up. I only turned it on for a second to see if it would come on and it did. I only turned on for a minute, temps outside real low, and I know its not good to run.

I waited 5 mins, and switched to heat. Heat comes on and turns off as it should.

Auto / On fan switch appears to be functions fine.
 

Last edited by Auger; 01-15-11 at 07:04 PM.
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Old 01-15-11, 06:52 PM
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you have everything wired correctly for conventional system. the only problem with this is if you have a heatpump on the system then you are wasting money on electricity.
 
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Old 01-15-11, 07:02 PM
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How do I tell if it's a Heat Pump or an AC unit ?
 
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Old 01-15-11, 07:06 PM
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see if it has a reversing valve inside ( you may be able to look in through the top and see this valve) and you can also tell by the low voltage wiring inside the unit. see what the stat wiring goes to inside the unit
 
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Old 01-15-11, 07:13 PM
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I found my answer in stuying the Model number....

Payne units Models starting with - PA are A/C's

Units starting with - PH are heat pumps.

My unit is a Payne Model PH12NAD48-B

So here we sit currently.

I appear to be wired correctly for convential system.
I have a heat pump... and thats wrong.

With that noted, what are my options?
If I keep the Stat in for the night, will I have any issues?

Can you recommend what I need to get for a proper Stat?
 
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Old 01-15-11, 07:17 PM
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i would look at a honeywell with 2 heat 1 cool heatpump. you can use it the way it is tonight, you are essentially using emergency heat.

How many wires are there at the stat? this will determine what type of stat we can use and why I think it was wired the way it was. (someone was lazy) and I'm also under the assumption this is a manufactured home?
 
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Old 01-15-11, 07:31 PM
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My posts are long winded, and Im sorry.

Yes, it is a manufactured home. (I live in the South... is there another kind of home ? lol)

There have always been 5 wires at the Stat. (Red,Green,Yellow,White,Blue)

Wires FROM the HP are the same colors. (Red,Green,Yellow,White,Blue)

If you look on page 31 of http://www.nordyne.com/Literature/708172a.pdf lower diagram titled heat Pump... I assume this is what I need to do?
 
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Old 01-15-11, 07:34 PM
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yes. this is what you need to do. however you dont have enough wires. i can get around too few wires @ stat. cant get around 2 few from hp to furnace
 
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Old 01-15-11, 07:37 PM
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Also if I were wired this way and it was forcing the unit to emegency heat, wouldnt I expect to feel warmer air, since that forces both sets of heating elements to kick on?? The air temp appears to be the same as it was before, no warmer.

How many wires would you expect from the HP ?

Based on the diagram, I should have 4 coming from HP, I have 5.
 
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Old 01-15-11, 07:51 PM
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it was not wired correctly before. depending on outdoor temp it may or may not feel any warmer or colder than before. and you are correct you have enough wires from HP just not "normal" colors
 
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Old 01-15-11, 08:06 PM
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OK Hope I get this right....

Need to replace Stat w/ a 2 Heat / 1 Cool.

Need to figure out what color wires go where on the HP. (As soon as I figure out how to access them on the unit). Don't worry, I ALWAYS kill all power first.

Need to wire according the the diagram.

Need to slap whoever wired this up in the first place if I ever find out...

Looking at Stats... how do i know if its 2 heat / 1 cool ??? they never list anything... looking at Lowe's. And I need to stay inexpensive... v small budget.
 
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Old 01-15-11, 08:14 PM
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yes, slap them or worse! Get the correct stat. are you willing to run more or different wiring to stat from furnace? if not then use a honeywell IAQ stat. this only uses 3 wires to the stat from a module mounted on the furnace or in the furnace closet. Ask for help here and you will get it! I know what the designations in your HP should be and we can wire it how it needs to be but it may take some time. We also dont know if everything works properly in the hp because it was not wired properly previously. Its very hard to diagnosis over the pc and do low voltage wiring, but try and you will learn something. you may not be able to get the correct stat at lowes. it may have to be ordered online
 
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Old 01-15-11, 08:24 PM
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Ouch... checked the price on that Stat... way more then I can afford at this time.

Was looking at the Hunter 5-1-1 Day Programmable Thermostat it says "Compatible with Most Furnaces and Cooling Systems (24 volt & millivolt)"

You still have me lost on number of wires though.

5 wires from Stat to furnace
5 wires from HP to furnace
4 wires from furnace.
All wires are spliced at the furnace.

How many more wires do I need to run to HP or Stat ?

Also.. wire diagram shows the 4 wires from HP should be:
Grey or Green (We have green)
White
Orange or Red (We have red)
Yellow

Only extra wire is the blue one.
 
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Old 01-16-11, 07:32 AM
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your replacement stat must have emergency heat function and it must be 2 heat 1 cool. You may have to spend a little more money for a heat pump stat. Heat pump stats are not usually cheap. I do not recommend programmable stats for Heat pumps. This stat is at lowes.

From stat
red - 24v hot
white - Aux. heating
yellow - Compressor
orange - Reversing Valve
blue - 24v common
green - Fan

Blue may or may not be needed depending on the stat.
The stat I recommended above does not require the blue wire when used with batteries.
 
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Old 01-16-11, 07:54 AM
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Went and bought a Hunter Universal Programmable PLUS -

Handles up to 2 heat / 2 cool systems. Cost was about $48.00 @ Lowes. They were kind enough to exchange the Honeywell for it.

Installed like a champ > 5 mins. Still need to sort out the HP wiring, but atm I have heat and the wife is happy again... for now.

Once I get the connections identified at the HP, I'm sure I will be back.

Can not thank you enough for all your assistance. You are a God send !!

Have Great Day !!! Stay Warm, I can now.
 
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Old 01-16-11, 08:21 AM
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you are welcome. Glad I could help
 
 

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