trane ten ton heatpump split system. new install..problems

HVAC questions and problems within commercial installations.

trane ten ton heatpump split system. new install..problems

Postby panther » Sun May 08, 2011 9:02 pm

Start up.- suction pressure in cooling on 90 degree day wouldn't go above 70 and head around 300. evap. coil of coarse freezing up, thought it might be expansion valve so we replaced it and that only brought suction up a little, not much. Airflow is fine, removed blower doors and no change in pressures also, fan going right direction, when changing expansion valve blew out lines to see if there was restriction in lines and none were found also no kinks..so I'm out of things, only thing I can think of next would be cap. tubes at evap. coil restricted somewhere..
410a system, If anyone has some sudgestions on what to check, I would be greatfull..

pink_e@*
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- trane ten ton heatpump split system. new install..proble

Postby panther » Sun May 08, 2011 9:05 pm

m
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- trane ten ton heatpump split system. new install..proble

Postby heatseeker » Tue Jul 19, 2011 8:42 am

did you replace the filter dryers or is there any screens or check valves in the system that could be clogged?
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- trane ten ton heatpump split system. new install..proble

Postby nomadpeo » Thu Jul 21, 2011 11:52 pm

410-a system with 70 and 300 - both pressures low. what is the subcooling. sounds like low freon.
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- trane ten ton heatpump split system. new install..proble

Postby derrold_d » Tue Aug 02, 2011 7:01 pm

yeah its hard to give you ideas without subcooling and superheat. it could be lots of things at this point. must be commercial? did not know they even made 10 ton units i figured after 7.5 tons if a split system was still needed they had to twin units.
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- trane ten ton heatpump split system. new install..proble

Postby Chillerman » Fri Mar 16, 2012 9:42 am

I would try working the reversing valve, Believe it or not I've worked on a 30 ton heatpump of course it wasn't a split system. York, Had to change the compressor, what a pain
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- trane ten ton heatpump split system. new install..proble

Postby heatseeker » Thu Mar 22, 2012 3:24 pm

Split systems go all the way up to 100 tons or more if you wanted to do it.
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- trane ten ton heatpump split system. new install..proble

Postby mr151 » Tue Mar 27, 2012 10:26 pm

were the line sets flushed, did u try adding freon 300 head isnt out of range on 410a more input...was the tstat properly programmed what were ur pressures in heat mode?
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- trane ten ton heatpump split system. new install..proble

Postby MOBIN_M1 » Wed May 02, 2012 1:27 pm

Pressures for R410a A/C should be more like 130 L.S. and 430 H.S. outside air 95F and inside air 80F.
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