cooling cycle

[Ilikecoke6]

My Vendo 39 is cycling about ever 5-6 mins, I have a temp probe and mesaured the temperatures at start up and end of the compressor cycle. They are as follows.

Start at 35.6
End at 34.0

Does anyone know how i could increase the time between cycles?  it just seems that it is cycling too much.

Maybe it needs a charge?

Which brings up the question of how i would do that...

Thanks

[SIGNGUY]

Adust the cut in and cut out settings...

if it 's getting down into the low 30's for temp. you have enough coolant..

you either don't have any product in the machine to help hold in the cold, or I 'd think you have bad insulation or a bad seal.

it should cycle 2 maybe 3 times an hour with good seals, insulation and stocked.

[Ilikecoke6]

Thanks

it is odd, the unit is full of coke, I dont know about the insulation, i have never taken a peek in there.  The seal aound the chamber is new, just replaced it in the summer.

There seems to be only one screw to adjut the settings, is this correct?

Is there anyway to adjust how the range of temperatures? like compressor start at 35 and compressor shut off at 41 or something like that?

[johnieG]

Yes, 35-45 degrees F. is a typical operating range for a soda machine, on the side or rear of some older thermostats there are two small adjustment screws that help set the cut-in ( hightemp) & cut-out (lowtemp) set points, you can try to adjust the cut-in point.

[Ilikecoke6]

Thanks,

I was just adjusting the one screw on top and and now it is cycling with a cut off temp of 28.5, wow, now I'm gonna freze some cokes.!

I will look for the small adjustment points at the back.

[johnieG]

Remember that with thermostats main control knob that the higher the number on the dial ( 0-9) the colder it gets, on T-stats without a numbered dial, clockwise is typically colder.

[Ilikecoke6]

It is very intresting, as i adjust the single screw at the top, i can change the temp settings, but i can not change the start and end temperature independelty.  

It maintaines it tight, too tight i think temp setting, in this case

On at 35.8
Off at 33.4

My question is, Is there some way to increase the range between the temps?

Thanks

[johnieG]

Sigh... So if your Thermostat doesn't have the smaller cut-in/cut-out adjustment screws on the side or rear of the housing, then no, you can't, get a new one.