I prefer pump down systems. Does this system have a time clock?

 

Sure and it's a pump down system. When the thermostat gets cool enough it closes the liquid line solenoid which I also installed.

The LP switch then shuts off the compressor when the suction line gets to low. When the thermostat heats up it opens the solenoid and the LP switch then closes and starts the compressor.

It has a defrost timer clock which I set for 30 min defrost every 6 hours. Do you think that is to long and or to often? Thanks in advance.

 

30min every 6, 12, 24hrs. 1 hr every 6, 12, 24hrs. Depends on the equipment and environment.

 

Thanks but what are your recommendations for the thermostat settings? Temperature and range for off and on? got it at 37 F now with a +/- of 5 F. Thank you very much

 

Also want to mention that with refrigeration its refered to as a Temperature Control 👌

 

37 and 5 seems low, if it begins freezing up raise it 2 *f

 

I have alot of my walk-ins set around 30 degrees, but it keeps the temp around 36. I think its because of the placement of the sensing bulb. I have it on the back side of evap.

 

Most people can't tell the temperature of beer, they just want it cold. Nothing wrong with 37/5. 34-36* should be your target temp and I would run 36*cut in/3*dif if the box is sound. If there's a lot of air infiltration, the 3* differential may cause short cycling.

 

I have not done many walk in beer coolers, but as you may know, the alcohol in the beer will lower the freezing point of the product. Most of my customers had wanted the beer at 35 degrees. So I would set it at 33* with a 5* diff (33-37). That being said, we also have to make sure the evap does not frost up, so warn the customer to watch for that. Do not trust the mechanical thermostats to actually be true to what is printed on the dial. You must verify the actual temp ranges. Or go with an electronic t-stat with a tighter range. I like the Johnson 419a or the Ranco ETC. If you are not familiar with refrigeration, the evap typically runs at 20* coil temp. (Most of my customers now are schools, so not much call for beer!)

 

I was told many years ago that draft beers perfect temp coming out of the tap is 37*

 

The beer is going to gain heat when it runs thru the lines. The glycol lines run at 27*

 

If the cut out is 37 and cut in is 42, the defrost time clock is for insurance purposes only and could probably be set to one hour at something like 2am.

It's when you start getting colder with only a two or three *F differential that the coils may not get a good defrost during the off cycle and the time clock becomes much more important.

 

I work on this stuff all the time. But there are some questions, Is this air over defrost or electric/hot gas defrost? A good safety is to use a digital stat and place the sensing bulb in the coil (only for air over defrost systems). This will prevent the coil from icing up but when doing this you need to set the cut in/out temps colder to accommodate the coil temp. Air over needs a longer defrost (like 1 hour) but the bottom line is everyone likes cold Beer (unless your from Europe) so 33* would be ideal.