coleman coil

[lioni hvac]

help?? Just installed new coleman 2 ton 410a a/c with horizontal coil with txv with a 60,000 btu 80 % heater in attic. Only half of coil getting cold. Can not get subcooling or a good split. I changed txv 2 times. Also replaced freon 3 times. no change???

[MM#7]

help?? Just installed new coleman 2 ton 410a a/c with horizontal coil with txv with a 60,000 btu 80 % heater in attic. Only half of coil getting cold. Can not get subcooling or a good split. I changed txv 2 times. Also replaced freon 3 times. no change???

curious, coming off the furnace, do you have a nice transition duct the longer the transition duct the better,:.02:so it spreads out the airflow so it catches the whole coil?

[lioni hvac]

coil is on furnace

[lioni hvac]

I did the same system last week it works fine.

[MM#7]

coil is on furnace

yeah i got that, but the coil is horizontal, correct? which means its lying on its side, did the other coil have a a-coil or a horizontal coil. what was wrong with the old coil? was this a easy swap, or did you modify the duct coming off furnace! how much space is from the furnace top to the horizontal coil.1 ft. or is the coil jammed up against the furnace and did you just fill in the gaps with tape/metal, trying too get a mental picture here!

[MM#7]

I did the same system last week it works fine.

ok maybe one of the pros has a suggestion, good luck!

[lioni hvac]

case coil system laying on its side a coil

[MM#7]

case coil system laying on its side a coil

how long have you been doing this type of work, do you have a co. or work for some one?

[lioni hvac]

company 15 years first time this happen to me and my friends

[Keith73]

Reuse lineset? Purge lineset? Evacuation to what micron level? Feed tubes freezing one side only? What is the superheat and subcool values? Airflow measured?

More information and maybe a few pics may help.

[lioni hvac]

Yes reuse lineset, yes purge linset, Evacuation good. I pulled blower motor wire and ran a/c All feed tubes froze. Subcooling 3, airflow good my spilt is 10

[lioni hvac]

Also feed tubes does not freeze with system not running.

[gregp]

Yes reuse lineset, yes purge linset, Evacuation good. I pulled blower motor wire and ran a/c All feed tubes froze. Subcooling 3, airflow good my spilt is 10

readings correct? You only have 3 degree subcool?

[SouthTex]

had one one time installers installed txv didn't take out the flow rater, low suction poor split unit was charged by subcooling to specs

[lioni hvac]

Yes i removed flow rater.

[wsykes]

sounds like you got a bad evap coil form the factory and its restricted
get your post up and get your pro membership and post this on the pro side

[ChaseAir]

You need to know subcool and superheat. Your subcool should be higher than 3. Sounds undercharged. What was the superheat?

[hceptj]

sounds like you got a bad evap coil form the factory and its restricted
get your post up and get your pro membership and post this on the pro side

Ditto

[Cmstech]

Orifice clogged from install?

[comfort comando]

Any filter dryers that could be pluged?

[jim147]

Orifice clogged from install?

Negative points for

http://i776.photobucket.com/albums/yy50/jdavis147/ThreadNecromancy4.jpg

:angel:

jim

[coolwillis]

only half of coil getting cold? 3 degree SC? not sure what spilt is... If its milk, you aint supposed to cry. I know that. I've heard old timers call the temp difference the "split". If thats what you're talking bout, 10 just wont do. I'm probably wrong but I'm thinking under charged.

[craig1]

get your subcooling up to 10 and see what happens.

It sounds like you're undercharged.

[jnsrose]

Yes reuse lineset, yes purge linset, Evacuation good. I pulled blower motor wire and ran a/c All feed tubes froze. Subcooling 3, airflow good my spilt is 10

Are you saying you ran the ac with no blower? This would sure cause all your tubes to freeze.