dry cleaning machine

[question mark]

hi guys
just recently i came across a refrigeration unit on dry cleaning machine. does any one knows what are the operating pressures or temp. and also what should be the temp deference between temp before the evaporator and after the evaporator. i am trying to understand them.


thanks

[install monkey]

does nameplate state gas charge?

[question mark]

yea name plate does states the charge. its 4 kg. but sorry mate how is that going to help in order to assure right operation. i don't know will the super heat and sub cooling will be same like fridges or due to very warm drum it is different. really don,t know weather any one knows about them . couldn't find any useful stuff on goggle as well.
thanks any way at least you replied to the query.

[Rob White]

yea name plate does states the charge. its 4 kg. but sorry mate how is that going to help in order to assure right operation. i don't know will the super heat and sub cooling will be same like fridges or due to very warm drum it is different. really don,t know weather any one knows about them . couldn't find any useful stuff on goggle as well.
thanks any way at least you replied to the query.

I might be wrong here but I think Install Monkey means the type of
refrigerant as well as the weight??

Type of refrigerant will give a bit more understanding of operating pressures.

Regards

Rob

.

[question mark]

sorry mate. 134A 4 kg. 1 evaporator, 2 condenser ,one is water cooled other is air cooled condenser. and one txvalve.

[install monkey]

i was referring to the fact that if the existing gas charge inside the machine is 4kg and u pull out 4kg then you can rest assured it will perform as well as it could, as long as coils are clean

[question mark]

but isn't that is quite a process to reclaim all the gas just to find out weather system has right pressure. but even if i reclaim and check the charge against name plate. still system might have faulty TX valve or pressure regulating valve not operating. but i will not be able to confirm their operations if i don't know normal operating pressures and temp difference across evaporator.

regards
QM

[Tayters]

Is it like a dishwasher I worked on once where there was a fridge circuit to heat the water and the cold air helped cool the kitchen?

In your case does it use the fridge part to provide the heat for the dry cleaner?

Anyway, whatever type it was, if it was me I'd fire it up and see what the subcool and superheat are. This should tell you if there is a low charge, restriction etc. Obviously check the air and water flow are alright. From there I would imagine the evaporator would be at temps around an AC unit.

Cheers,
Andy.

[joe-ice]

You will find it very hard to come across any information on these machines.The ones i have worked on used the condenser heat in the cleaning cycle then used the cooling cycle to recover the cleaning agent .Cannot rememember pressures but they ran higher pressures than your average fridge circuit and they had a sightglass to indicate charge.they also had an oil fired still on them to clean the cleaning agent .Some complex machines for the size of them

[chilliwilly]

What make of machine is it? I work on these machines as well from time to time, usually Bowes and Renzacci and its the best kept secret when it comes to technical information on any part of them. And nobody provides training courses on them, they just bullsh!t you and don't bother to turn up to meet with you to discuss options of any kind.

They all are basically the same, but some of the engineers that I know tend to leave the fridge side to fridgies. Basically in busy periods the plant requires a fast distill to reclaim the perk. They usually go up to about 60 deg C, so that is a starting point for your heat load, but on a quieter periods they usually reclaim at 30-40 deg C. That's probably the air condensor you mentioned, but I have only ever come across water cooled condensors on dry cleaners, and only cap feeders.