Cycling

I got my Vendo 90 running, it died, found out it was the thermostat.  I changed thermostats and it works like a dream.   However it seems to cycle about every ten minutes.  Compare to my refridgerator it seems like it is way too often.  Any ideas on what is "normal" and how to correct it?

Justin

[loman4ec]

Is the machine full of soda? I know that soda is a great insulator and will make the machine more efficient. Also is there any leaks in the machine. Like a door seal. If so that would be the problem.

No sodas in it yet, I have doing some test runs before.  I can't notice any air leakage around the seals.  Justin

[johnieG]

Quote (JustinBoots @ April 10 2005,11:06)

I got my Vendo 90 running, it died, found out it was the thermostat.  I changed thermostats and it works like a dream.   However it seems to cycle about every ten minutes.  Compare to my refridgerator it seems like it is way too often.  Any ideas on what is "normal" and how to correct it? Justin

Where did you get the Theromstat? & did it come with a Spec. sheet (specification & information guide) that specifies the cut-in & cut-out & temperature range of the thermostat?

put on a Robertshaw 3040 cold control unit from my local refridgeration supply house.  The only specs on it are FL = 20 amps  LR = 96 amps.  Justin

[globalcompressors]

Justin,

You need to know if the thermostat is a "contact" style or an "air probe" style. If it is an air sensor style and is making contact with the evaporator coil tubing, it will read the coil temperature and not the box temperature resulting in compressor "short cycle". Try moving the probe placement around and see if that helps.

The other thing is to have a full box as Loman had suggested. If the box is full of product, it will hold temperature for longer periods between compressor cycles.

Eric