Original message
| CarlF
 |  "Liquid line too small?"
, posted Fri 15 Aug 19:04  
I have a small commercial building in North Florida. Its got a new Ruud 2.5 ton split system A/C just installed. New ductwork, new lines, new everything. Upon initial startup, the thing runs great and cools great, but over the period of about 5-6 hours, the thing starts to not cool so well, due to ice formation on the evaporator coils and on the suction line adjacent to the compressor. Pressures have been checked twice by a tech, with everything OK. I noticed the other day the liquid line, which stretches about 75 feet to the evaporator, with aboout a 10 foot rise, is sized at 3/16, rather than the more often seen 3/8. I can see the line size reduction where soldiered at the condenser and evaporator units. Is this my problem? Am I starving the expansion valve of liquid as the unit continues to run? Somebody who knows something please help. Thanx in advance
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| "Re(1):Liquid line too small?" , posted Fri 29 Aug 17:29
it could very well be, what kind suction pressure you have?
at face value i would say that your condeser is oversize for the size of evaporator, does your air handeler moving enough air,
AKS Environmental test chambers Tech.
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