Temp output during defrost

[jeepgrady]

I got a reading of about 65 deg. from my vent during a defrost cycle. Is this an acceptable temp? Seems a little cold to me.

[Gunslinger]

what size heat strips do you have? Size of the Air handler?

[jeepgrady]

It's a 4 ton with 10kw

[Gunslinger]

seems a little cold. Pull amp draw to see if all strips are connected and functioning. I've seen units installed with undersized wire and breakers. The installer would disconnect some of the strips so you may have 10KW but only 5 or 7kw connected.

[tigerdunes]

jeepgrady

I think the other question that should be asked is "why are you even having a defrost call" for the SC coastal area.

what was outside temp and humidity when defrost call started?

time defrost or demand defrost?

TD

[Kevin O'Neill]

Bob,

You have demand defrost with your Lennox XP-16. 65 degrees seems about right with a 4 ton and 10 KW strips. I have had 2 other calls on defrost already today. It was 37 degrees when i got up this morning, it is normal to have defrost during those conditions.

Kevin

[jeepgrady]

Thanks Kevin. I know about the demand feature. It just seemed 65 was a little chilly when in defrost. If you say it's OK, that's good enough for me.

[BaldLoonie]

You have 48K cooling and 34K heating. Cool air would be expected.

[amd]

That's a minimal amount of back heat for a 4 ton HP - I hope you're in a hot climate.

[jeepgrady]

Read my signature. I'm in SC.

[dan sw fl]

I got a reading of about 65 deg. from my vent during a defrost cycle. Is this an acceptable temp? Seems a little cold to me.

Supply & Return can NOT be the same if the strips are working.

[dandyme]

You have 48K cooling and 34K heating. Cool air would be expected.

yep




you're going to have cool draft during defrost..................

[Kevin O'Neill]

Supply & Return can NOT be the same if the strips are working.

They can if both the heat and cool are on at the same time, which is the situation during defrost.