On Sat, 09 Feb 2013 19:58:44 +1100, Krypsis >
wrote:



>>
>> Not knowing myself at all but that sounds like total BS to me. A freezer
>> should be connected and controled by an INTERNAL thermometer, not go by
>> outside temperature. I know many people with freezers and fridges in their
>> garage and I've never heard this nonsense.
>>
>> In your case, Julie, it's probably those darn rats again...causing trouble.
>>
>> Gary
>>
>If you understand how fridges work, then you would be able to comprehend
>the situation better. Car airconditioning systems aren't a lot different
>in operation though having iceblocks flying out of the vent at you isn't
>a desirable outcome for those.
>Anyway, the only part of the works with any real connection with the
>inside of the freezer are the evaporator coils. The thermostat would be
>there as well but it's only sensing internal temps. The rest of the
>works are outside the box!

This is one explanation.
Running a capillary system in low ambients will cause low condensing
pressures, low suction pressure and masses of subcooling and very low
suction superheats, with no warm liquid to boil off any liquid which
enters the suction line.

In short you will wreck the compressor by liquid flood back,
especially when the freezer has any buildup of ice on the evaporator.

The only way systems such as this work at all is the limited amount
of charge that is in them, which tends to trap in the condenser.