Need HELP swapping a Vision pro 8320u1008 to an IAQ one

beenthere

No reason to lockout the heat pump with electric aux heat.

Aux heat can't come on at 20°, if you have it lockout until 0.

What was it set for before you changed it.

N01B4ME

Damn I dont know. I was freezing last night at 4:00am with a flaslight trying to figure out what was wrong. This whole week it will be in the 20's so I need to figure it out.


How did I know you would be the first one to reply. You are FAST ... thanks man for all of oyur help before my electric bills have dropped drastically from swappping the tsat.

beenthere

Good.

And don't lock out the compressor.

N01B4ME

I don't understand by what you mean. My heat pump would come on for 20 seconds and then shut down everytime since t was cold... What would I need o set it to then.


Thanks

beenthere

If its only running 20 seconds, something is wrong.

Where is the outdoor temp sensor located.

What brand and model number is your outdoor unit.

Most newer heat pumps can efficiently provide heat down to about -10°F outdoor temp.

N01B4ME

Both of them are frigidaire By Nordyne. Model #'s for them are:

Heat Pump Model FT5BD-048K

Furnace B5VM-T49K-C


The outdoor temp is located on the wall beside my heat pump. It was reading 32 degrees when I heard the heat pump would come on cycle 20-40 secs and turn off. I thought this was bad for the heat pump so thougt lock it out below 35 degrees...

My installer said that heat pumps dont work below 30 degrees in florida so I assumed he is correct.

beenthere

Ask him why they work at temps of 0°F in other states then(such as here in PA).

Sorry. Your installer doesn't know what he is talking about.
And something is either wrong with the heat pump. Or not set up right.

N01B4ME

I am done even talking to the installer. He is clueless and I have spent thousands with this guy and am here begging for help. I am at the point that I don't know who to trust when you call a person to your house. especially when oyu spend thousands for sometihng that is tied to labor with that person...

Does my heat pump work below 30 degrees by looking a thte model #.

Sorry I am just venting.

N01B4ME

Earlier in the thread it was noted that some wires were incorrect so I swapped them out to fix my ac issues and hte system running inefficiently which evidently is fixed now. They system stopped short cycling the rest of the summer and I was happy. I had no way of testing the em heat at that point that I knew of since it was hot here.


These are the settings form the manual of the IAQ

0350 Heat pumpcompressor lockout
40 Default
0 No compressor lockout **
[Other options: 5 to 60°F (-15°C to 15.5°C)]
0360 Heat pumpauxiliary lockout
0 No heat pump auxiliary lockout **
[Other options: 5 to 65°F (-15°C to 18.5°C)]

beenthere

Your heat pump is capable of providing heat at temps of 0°F.

Your heat pump may be over charged. And was cycling on a high pressure switch.

For aux heat lock out. Best way to set it. Is to set it to 10°.
Then, what ever temp you discover the heat pump doesn't provide enough heat. That is your aux lock out temp that you should set it too.

A dirty air filter can also cause it to cycle on high pressure in heat mode.

N01B4ME

I will change my filters out as soon as I get to lowes in a few on my way home and set the settings accordingly. Will update tonight when it gets cold .

N01B4ME

UPDATE. The heatpump was working perfectly until the temp got down to 33 degrees just now(From the tstat reading outside sensor). I had the tstat set to auto and the inside temp was 77 degrees and maintaining. Now it dipped down to 75 and the VS blower is still on but the heat pump is cycled off aty this time. So should I set the 360 option to 30 degrees?

The VS blower is still on but the aux heat is not coming on yet. I did set it to 10 degrees.

Wow I am thinking of running to Walmart to get a space heater as I do not wnat to freeze tonight..



Just noticed the heat pump came back on and it is blowing warm air...

beenthere

Is the stat locking out the heat pump. Or did the heat pump stop running for an unknown reason.

Your outdoor unit doesn't come set up to stop working when its 30° outside. So either the stat is doing it. Or something is wrong with the unit. Or they installed an outdoor stat that shuts your outdoor unit down.

Yeah. just raise your aux lock out temp. Will have to set it to 35, if your heat pump is not working at 33.

If the stat is not the reason the heat pump stopped working. Something is wrong with the heat pump.

N01B4ME

Wow I appreciate all of your help. The heat pump came back on so It must have been a cycle. Now the the air vent temp with my Raytech gun is registering 98 degrees....

beenthere

Premature doom and gloom.