SMC Discussion Areas

Trouble-Shooting => Refrigeration => Topic started by: canton335 on September 08, 2020, 07:27:18 PM



Title: VMC44 thermostat - A12-700 or 701 ?
Post by: canton335 on September 08, 2020, 07:27:18 PM
I'm trying to figure out if I have the correct thermostat in my VMC44.  I'm just getting back to putting the machine into service and I'm not sure about the temps it's running. 

Air temp about half way up the empty bottle rack is ranging from 26F to 38F with the thermostat on #3.  I'm running the A12-700, but was wondering if maybe I shouldn't have went with the 701.

I'm not sure what's "normal" for an empty machine.

Any help appreciated.



Title: Re: VMC44 thermostat - A12-700 or 701 ?
Post by: Jim on September 10, 2020, 06:02:25 AM
Keeping the machine at least 3/4 full of product would yield accurate results. I am uncertain as to the functionality of the thermostat models you listed...
Ensure the fan blade is correct for evaporator motor rotation also.


Title: Re: VMC44 thermostat - A12-700 or 701 ?
Post by: canton335 on September 10, 2020, 05:02:10 PM
I'm flying a little blind here.  I put the machine back together the way I received it.  Which way should the air be moving over the evaporator ?

I should be able to fill it up this weekend and get some better readings.

As for the thermostats, from what I can tell, the 700 regulates from 37F to 26F and the 701 is from 41F to 31F at their warmest settings.


Title: Re: VMC44 thermostat - A12-700 or 701 ?
Post by: johnieG on September 11, 2020, 06:52:16 PM
I use the RANCO A30-2210 on almost all of my repairs, it's an air-sensing type that has a Range of 30F to 43F with a differential of 8 deg. F

Plus it comes with an attractive face-plate & control knob.


Title: Re: VMC44 thermostat - A12-700 or 701 ?
Post by: canton335 on September 15, 2020, 08:53:51 AM
Thank you for the information on the Ranco.  I will definitely check it out.


Title: Re: VMC44 thermostat - A12-700 or 701 ?
Post by: canton335 on September 15, 2020, 05:18:56 PM
Hey. So I never did get an answer.   Which way is the air supposed to move over the evaporator?


Title: Re: VMC44 thermostat - A12-700 or 701 ?
Post by: johnieG on September 15, 2020, 06:12:51 PM
typically in the front & out of the back / up the rear wall,  but on a V44 I believe it pulls air in from the bottom and blows up into the bottle stack


Title: Re: VMC44 thermostat - A12-700 or 701 ?
Post by: canton335 on September 15, 2020, 07:30:24 PM
Thank you very much for the information.  I believe this machine was in original condition when I got it and you have confirmed the air flow for me.  That's the way it was flowing when I received it and the way it is flowing now. 

Thanks again.