Kysor Warren Single Deck Meat Case

[dilvala]

Model M1A 12' long about 48' total

5hp compressor running 409a gas

I have a problem that none of the local repair tech are able to figure out. Even called in tech that KysorWarren recommended and still nothing.

Problem are 2 front -
Can not get the product temp below 40 degrees.
Evaporator is freezing up within 2 days of getting all the ice off it.

This unit has been in this building almost 25 years.

there are 6 - 25 min defrost cycle put in by the last tech. who also adjusted the superheat at each section of the open single deck meat case. he also checked the humidity in the store and it was around 45. there are no ducts blowing air on the case. the store temp does go above 75 to maybe 78.

the thermosatat is hooked up to a solenoid that is on the return line and that's all the controls the configuration.

the liquid line is cold and has a little frost right below the case i am not sure what else to do. Have been spending a lot of money and have no results.

I have to get the product below 40. and get the ice off the coils.

anyone able to repair this i am at zipcode 31021

[VTP99]

[QUOTE=dilvala;13681361]Model M1A 12' long about 48' total


the liquid line is cold and has a little frost right below the case

I would look here for your problem.
*****He corrected the line type.*****

[dilvala]

[QUOTE=VTP99;13681451]

Model M1A 12' long about 48' total


the liquid line is cold and has a little frost right below the case

I would look here for your problem.

its the bigger of the 2 pipes going to and coming from this case. not sure if that's the liquid line

[VTP99]

[QUOTE=dilvala;13681561]

its the bigger of the 2 pipes going to and coming from this case. not sure if that's the liquid line

That would be the suction line not liquid. How many TXV's are there ?

[dilvala]

[QUOTE=VTP99;13681581]

That would be the suction line not liquid. How many TXV's are there ?

4 one for each 12' section

[VTP99]

The case did work correctly at one time yes ?
R409 would run at about 22 psig. Do you know what that suction pressure was ?
Did he check all 4 TXV's ? What did he set them at ?
Does the system have a sight glass ?

[dilvala]

model # for the solenoid?

[VTP99]

No for the Kysor case. Does the solenoid valve not close during defrost ?

[dilvala]

Ksyor case M1A12U is the case number. I don't think the solenoid closes during deforst because nothing else is connected to it. I would think it would stay open because the case temp is higher and the thermostat is calling for the solenoid to open.


Dchappa21 - i called the company and they said the fans should reverse but my case do not have that relay that make them go in the other direction.

[dilvala]

http://kysorwarren.com/docs/uploaded...71001_MEAT.pdf



looks similar




45 min defrost would kill the red meat that its displayed in it.

[Dchappa21]

It should terminate at 45 degrees... If wired correctly

[refertecbd]

What is the method of defrost? 6 times a day should be enough but 25 mins may not be long enough if its off cycle.

[dilvala]

What is the method of defrost? 6 times a day should be enough but 25 mins may not be long enough if its off cycle.

air defrost with compressor turned off with a defrost timer