Help! Proofer Machine

[tuba]

I know I have asked here before, and no-one really had much information. Today my boss said I am going to work on a Hobart Proofing machine for a bakery tomorrow. About 10 months ago, I was helper on the same machine. My lead didn't know what he was doing and wouldn't admit it. He has since been fired and moved on. The machine has absolutely no markings about amount of refrigerant to charge, and the nice folks here told me that Hobart doesn't know because it was one of those businesses they purchased, but really didn't support. The only plan of attack I can think of is to take amps, pressures, pipe temperatures of one of the machines that work and try to duplicate it.
Has anyone been in a similar situation or can anyone give me some insight about proofers? The unusual thing about it is that there is an AEV with a bypass around it and a solenoid valve in the middle of the bypass. Then the TXV is after that in the evaporator. Sorry, no #'s at this time......

[Octopus]

Dose this bakery have a dumpster in the back? Use it!

Seriously you need to call hobart someone somewhere will know something you just need model number/serial something.... Compressor have a plate you could start by looking to see if it's pulling crazy amps or low amps superheat/ subcooling no model number needed for that....

[jpsmith1cm]

I know I have asked here before, and no-one really had much information. Today my boss said I am going to work on a Hobart Proofing machine for a bakery tomorrow. About 10 months ago, I was helper on the same machine. My lead didn't know what he was doing and wouldn't admit it. He has since been fired and moved on. The machine has absolutely no markings about amount of refrigerant to charge, and the nice folks here told me that Hobart doesn't know because it was one of those businesses they purchased, but really didn't support. The only plan of attack I can think of is to take amps, pressures, pipe temperatures of one of the machines that work and try to duplicate it.
Has anyone been in a similar situation or can anyone give me some insight about proofers? The unusual thing about it is that there is an AEV with a bypass around it and a solenoid valve in the middle of the bypass. Then the TXV is after that in the evaporator. Sorry, no #'s at this time......

HUH?!?!?!

An AEV with a bypass AND a TXV in series? There is no conceivable purpose to install those valves in that configuration.

[rayr]

I work on some FBM proofers and they all have CPR's on them cuz the comperssor will overload due to high suction pressure. Bagel proofers just run around 35 deg.

[mspanky]

Every Hobart proofer I've ever seen has a receiver, LL solenoid and Tx valve. Nothing special at all except the evap coils only last a few years before I put in one with a good heresite coating.

[Dowadudda]

certain types of proofing require some goofy set ups. I am not familiar with your components or machine myself. I just know I have spoken to guys who know a lot about proofing and certain products as I am to understand, certain recipes require different temps. Knowing that this is the case, when I read this I thought about that. Not sure.

It's like ripening rooms. I know a little about the process. But I don't see it. I wished I had a more diverse background than I do.

[tuba]

Thanks for the replies. I will post on how it goes

[tuba]

Wait a minute. What rayr said makes some sense. This is a proofer for pastries/donuts. Could it be that the AEV is bypassing the solenoid valve so that some refrigerant is allowed to "seep" through the evaporater - this way the compressor isn't "slammed" with the heat of the oven so hard .....? Hmmmmm Thanks rayr! If I remember to take a camera, I will try to post a picture. This should be an opportunity to give my new UEI DT304 thermometer a workout.

[tuba]

Well, we did it. It was a broken cap tube on the dual pressure control. The senior tech was with me. It was kinda hard to wrap your brain around the fact that your refrigeration system is trying to maintain around 100 degrees box temp at 65-70 percent humidity. We still weren't positive about the charge, but when there was a good heat load blowing off the condenser, and the sight glass was almost full, we stopped. Seems like it is working. They wouldn't know for sure until they did a full run of dough through it.:eek2: