delfield 404a units

[butch rose]

any help please! my company just started resteraunt services. Im working on delfield coolers i found unit way over charged 375 head .removed charge and recharged by nameplate unit is freezing evap. is there any suggestions. this happens @ about 38 deg. cabinant temp.:confused:

[Dr._Fleck]

Do you mean the evap is frosting? If so i would have thought this is normal.. Or is it freezing up solid over a period of time? If so there is a defrost problem.

[Gary]

My money is on insufficient evaporator airflow. :)

[Philip]

This is for you sir Gary,
I am really impress the way you answer(solved)some questions in this forum and i am much interested to your book.
How possible to buy your book("TECH Method Troubleshooting book")here in my country Philippines.

[Gary]

https://www.merchantamerica.com/tmethod/

[butch rose]

thank's for the help. i think i remedied the problem. found the thermostat embeded in the evap coil i relocated in the discharge air stream set stat @ 29 deg. now unit shuts down and thaw's ,out and keep's greate box temp without freezing solid.i am not sure if it's the right way,but it work's.