Non-bleed TXV and a compressor burnout are not necessarily synonymous.
Originally posted by bob hubbard
I had a scroll burn up the first year on a new install . It had a non bleed exspanntion valve on the varible speed air handler . The od unit didnt come with a hard start kit or a cc heater ? Why wouldnt they use a bleed valve on the indoor unit ? bh im really losing faith in this eqipment .
Poor installation procedures could lead to a burnout, overcharge of refrigerant, power supply issues, or...too many variables without actually being at the job.
Non-bleed TXV's do not allow the system to equalize during the off cycle. Non-bleed TXV's add a degree of efficiency to higher SEER equipment by reducing the pump down time on the evaporator after the compressor restarts.
A crankcase heater is a good idea whenever the compressor is installed in a location lower than the evaporator, or when low ambient operation is expected.
Building Physics Rule #1: Hot flows to cold.
Building Physics Rule #2: Higher air pressure moves toward lower air pressure
Building Physics Rule #3: Higher moisture concentration moves toward lower moisture concentration.