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Bean Counters don't call at 1AM....maybe 1 PM ...night stock bosses call at 1 am.

Maybe some one needs to make an App

www.lantric.ca great source for all brands of replacement contact kits...used to buy all the time...always worked out fine.

Always found the Yellow Jacket worked great, but 4 lbs./month on a rack is near zip. Could be a pinhole in overhead suction line that you will never find.
Or if you suspect the service deli cases ...

Looks like a late 80's to early 90's Hussmann rack,,,agree no problem...for the valve that is.....rack has likely made someone rich with service calls by now though:grin2:

May I suggest a SAVOD (Seasonally Adjusted Variable Open Door) control system hand crafted and tailored to your specific latitude,longitude and altitude.
Extensive studies and exhaustive research...

Do some searching and check out the manufacturer's websites the info is there. example http://www.hillphoenix.com/display-cases/miscellaneous-tech-data/ you need to learn all the info related to the...

Pull the pans and look at the piping configuration.
I am guessing that the solenoid is on the suction line, when energized the case is in low temp. mode and will run at rack EPR setpoint, when...

Because the carrot would have to be placed on a stick in the discharge air and the horsepower will continually try to catch the carrot but never quite get there and run on and on and on.....

Did you remove the compressor terminal plate from the compressor and clean all internal parts of the terminal plate?
Had to do this after a line to line short from a left behind knockout on startup....

http://www.clra.org/docs/agreements/RefrigerationMaintenance/RFG-M%20-%202010-10-31%20amended%20wages%20-%20CA%202007-2011.PDF

Link is for current wage rates in Alberta..Local 516 should be...

http://www.clra.org/docs/agreements/RefrigerationMaintenance/RFG-M%20-%202010-10-31%20amended%20wages%20-%20CA%202007-2011.PDF

Low voltage and condenser fan motor on way out (noisy) contributing to start problems?

Oh now I see the high superheat on your guages...don't own a fancy set like that,,,,,but would have caught the problem before case was even started, when I noticed the wicked pitch on the fan...

Factory styrofoam peice at top behind discharge honeycomb was too big, (cut on wrong angle)blocking majority of airflow.
Found this on several Hill end bunks at same store.

Liquid line drier in case was partially plugged, S.G. was cut in before drier??

What are the components in each case?
Suction line solenoid with 90 degree EPR for MT operation?

P.S. I find the larger rotating vane anometers do not work in the supermarket...

As an everday supermarket service tool, the Testo 410-1 has worked excellent for me.
Used to swear by the Alnor Jr. ( it is more accurate when 100% calibrated) but fragile and fickle when trying to...

Are the systems on 5/8" liquid lines still using the original 5/8" solenoid valves that remain energized through defrost?

It's possible these solenoid valves are not allowing proper return flow to...

Must agree on the EPR for dual temp.
We install lots of new dual temp. coffins.
Each section (8',12', end bunk) has its own dual temp. switch that energizes suction solenoid for low temp. and...

Just to clarify
From this discussion it sounds like higher amperage and hotter compressor head temps are expected from a discus compressor with a blown valve.

Should be the opposite from my...

They just like to stop for no definable reason....waste of money, from my all seeing vantage point....reverse motors=useless waste of money ,,,,ecm=useless waste of money lol end of discussion

Interesting idea, but I'd be concerned about stress on the condenser during its most extreme temp. conditions.

As for my previous "guarentee/ assumption" .......true these should not be made...

[/QUOTE]One thing I'd like to say since it's been mentioned. If I were choosing my own components for a rack, I'd choose the ball valve actuating motors over 3 way valves. For the reasons here and...

Common problem with split valves in cold weather locations. When the outside temp drops and the condenser pressure is lower than the suction manifold pressure you will get migration through the...

The original liquid line solenoid valve on a Kool Gas system is a special Sporlan bi-directional type.....you said you added this system to the rack? Could be wrong solenoid valve, or add check check...