Question about Beverage-Air MT27 Beverage Cooler Commercial

2 Answers

Bev air cooler

I have a mt 27 beverage air cooler. I thing it is a little low on freon. it is a 134a unit. What should the pressures be at 75F degrees atomospheric temp? Thanks Bill Ashbrook

Posted by on

  • billas Aug 13, 2007

    Thanks solutionGuy.

    I had cleaned the coils. The condenser fan evaporator fan and compressor were all running the temperature in the box was warm.

    This box has had a compressor change and has hi pressure and suction taps. The low side pressure was just about nill and the hig side was 100 psig. I added a litlle 134a and the box began to cool. I just dont know where to set the pressures.

    It calls for a 10oz charge, but it has some in in to begin with so I dont know where I am on the weight.

    I know tha car ACs run about 30 to 36 psig on the suction, and House airs run about 60 to 80 depending on the load on the system.

    I am looking for a ballpark number to set the suction pressure to.

  • billas Aug 13, 2007

    Thanks KOakaKo

    Thats about where I am. I have recovery equipment for 134a and about 80 pounds of new 134a, Sooooo. I would be best off recharging it and the write doun the readings for that temperature.

    Thanks again



2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 331 Answers

Bill, the main reason I've noticed for higher than normal temps in these boxes is filthy condenser coils (this will affect pressures in your sealed system). Remove the front lower panel and inspect your coils. Use a coil brush or a dust broom to thoroughly clean them up, don't use water. You can also pick up some condenser coil cleaner in a spray can from your local appliance parts store, but it's not necessary (the fumes are strong and may be objectionable to your customers... it gets 'em really clean, though!) After cleaning the coils, allow 24 hours for temps to stabilize. If they don't, here is a site for Beverage-Air, contact your local servicer with you exact model and serial number for pressure specifications. Hope this helps! Let us know, will ya?

Posted on Aug 13, 2007

  • Tracy Farrell
    Tracy Farrell Aug 14, 2007

    Bill, with ambient air at 75 degrees, you should get a static (compressor not running) pressure of 78.8 lbs. The running temp of the coolant on the high side will shoot up to about 140 degrees. At this temperature, your high side pressure will rise to about 229 psi.



  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.


    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 135 Answers

Here's the Beverage-Air website that shows technical and repair videos for your model: The videos are basic, and don't have the answer to your question. I can't access the "Customer Support" link on that site, because it asks for a serial number to continue. If you go to that link and give it the correct serial number, I'm sure that they will have that information SOMEWHERE on their support site. If not, then you will have to contact the company at 1-800-845-9800 and ask them directly what the proper R-134a pressures should be. If you need more help in answering this question, then just let us know. Hopefully this will be helpful enough to get you the answer you need. ;)

Posted on Aug 13, 2007

  • Kevin Omel
    Kevin Omel Aug 13, 2007

    This number may be more helpful in finding that answer...

    Technical Service Department: 800-684-1199

  • Kevin Omel
    Kevin Omel Aug 13, 2007

    If you're looking for just a ballpark figure, rather than an exact number, then that's different...

    I've seen them from 20 to 60, because different manufacturers make their systems differently. (Or the fridges I was checking were worn to different stages.)

    Do you know how close you are to 10 oz. right now? Given the cost of R-134a, I would say just empty the system again, inject a measured 10 oz. and call it good.



1 Suggested Answer



Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a Beverage Air model MT 27. Coils have been cleaned and recharged with freon. Cooler will not cool below 50 degrees?

You'll need to check the back-pressure on the low-side of the system, you have a faulty compressor. If there is a condenser fan motor make sure it is running when the compressor is on.

Jan 28, 2011 | Beverage-Air MT27 Beverage Cooler...

1 Answer

I have a Bev Air MT-27 cooler for home use. Is it possible to have it rewired so it functions more like a refrigerator so the fan doesn't run 24/7? And if that isn't possible, could I use a timer so that...

On commercial coolers, the fans are designed to run 24/7 to prevent the coils from freezing up. If the unit only runs 4 times a day, it will not maintain proper temps. Domestic units utilize the freezer compartment air to keep the refrigerator section at temp. Totally different set ups. I wouldn't do what you are suggesting with a commercial unit.

Nov 23, 2010 | Beverage-Air MT27 Beverage Cooler...

1 Answer

My mt 12 cooler doesnt blow cold just warm air

thermostat could not be set properly, compressor could not be running, unit could be low on freon. start checking some items and let me know.

Aug 03, 2009 | Carrier Beverage Air® Marketeer® MT12-1-B...

4 Answers

Need to know what type of freon to use to recharge a one yaer old Beverage Air Sandwich table refrigeration unit. Is this the same process as recharging an automotive AC system?

Beverage air used R134a almost exclusively on refrigerators. The process is similiar to ac systems. You should weigh the charge in as per the data plate. Be precise as over or under charge can dramitically affect the performance of the unit. Hope this helps

Mar 29, 2009 | Beverage-Air 44.9 cu. ft. / 1271 liter...

2 Answers

Beverage air cycling off/on

These units are not designed to run in temps much lower than 50 degrees. They have no winter controls and the freon pressures will take a nose dive when running in a cold ambient condition. The unit will not run well in a cold environment, compressor damage may result. :(

Dec 16, 2008 | Beverage-Air Beverage Air 2- Tap Unit...

1 Answer

Beverage air dd78e not cooling

change setting on thermostat and see if anything changes. If yes, that's the prob if no, freon level. start there.

Dec 14, 2008 | Beverage-Air Beverage Air 2- Tap Unit...

Not finding what you are looking for?
Beverage-Air MT27 Beverage Cooler Commercial Logo

979 people viewed this question

Ask a Question

Usually answered in minutes!

Top Beverage-Air Refrigerators Experts

Dennis Boxerman

Level 3 Expert

1300 Answers

John Tripp
John Tripp

Level 3 Expert

4656 Answers


Level 3 Expert

85223 Answers

Are you a Beverage-Air Refrigerator Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides