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Thread: Chill Room Evap Leaks.
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17-06-2016, 10:25 AM #1
Chill Room Evap Leaks.
I just leak tested a chill room that was low in refrigerant. There were around 6 or 7 pinhole leaks on the evaporator coil bends at various points but not on braze joints.
The cooler is a Frigabohn and was only replaced 4 years ago. Any idea why these pinhole leaks occur? Is there anything I can do when replacing this evaporator to ensure it doesn't repeat.
R404A is the refrigerant. Electrical defrost.
Cheers
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17-06-2016, 02:55 PM #2
Re: Chill Room Evap Leaks.
Hi Paul
What product is in the room and is it packed or unpacked
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17-06-2016, 05:49 PM #3
Re: Chill Room Evap Leaks.
These are copper coils with aluminum fins?
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17-06-2016, 05:52 PM #4
Re: Chill Room Evap Leaks.
Maggot bait rooms have this problem. The ammonia the maggots secrete to dissolve their food also dissolves the copper after a few years.
The solution is to keep brazing them up or fit a stainless steel evaporator.
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17-06-2016, 06:09 PM #5
Re: Chill Room Evap Leaks.
I use this material in cheese mature rooms. The same ammonia problem.
Fantastic and cheap solution.
http://www.refrigtech.com/Product/Ae.../defender.html
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17-06-2016, 11:51 PM #6
Re: Chill Room Evap Leaks.
chemi-cool is the Defender spray available online? As I couldn't find on eBay or Amazon!
I maintain, everything I have, myself.
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18-06-2016, 12:48 AM #7
Re: Chill Room Evap Leaks.
I get mine treated by blygold,or for maggots it's stainless every time!
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18-06-2016, 09:07 AM #8
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19-06-2016, 07:47 PM #9
Re: Chill Room Evap Leaks.
Have the coils gone porous outside in or inside out had problems with kobol coils and moisture after defrost with hot coil the system had moisture in and went around the evaporator like a pinball fitted core driers weeks vac good torr gauge no more problems it was suspected it came from manufacturer like it two different sites two different install engineers neither had issues on any other jobs
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20-06-2016, 12:50 PM #10
Re: Chill Room Evap Leaks.
Thanks very much for the replies!
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20-06-2016, 12:51 PM #11
Re: Chill Room Evap Leaks.
There is a mixture of food's and sauce's, all covered with cling film.
Dairy products, chicken fillets, sandwich meats, some fruit and veg and cheese.
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20-06-2016, 12:52 PM #12
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20-06-2016, 06:14 PM #13
Re: Chill Room Evap Leaks.
Come across it a lot on any cabinets holding products with vinegar in them such as salad prep cabinets . If theres any imperfections in the copper bends the vinegar just sits in it and eats it , and these coils are coated. A good help would be to store any products like that in sealed containers.
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20-06-2016, 09:48 PM #14
Re: Chill Room Evap Leaks.
I agree with Joes diagnosis, sauces contain all varieties of vinegars and spices which in a damp atmosphere can corrode all types of pipe work, even stainless steel can be eaten in moist chlorine atmospheres
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21-06-2016, 06:00 AM #15
Re: Chill Room Evap Leaks.
Had a similar problem in a chller with meat pickling tubs, chewed out copper/ali fin coils real quick. Replaced evaps with same but treated with blu coat treatment spray on stuff from manufacturer. And to avoid any galvanic reaction super bonded all and everything to earth/ ground. Still OK after 5 years.
From earlier post why the heck would you chill maggets?
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21-06-2016, 08:22 AM #16
Re: Chill Room Evap Leaks.
G'day Magoo. I'm not into fishing but maybe a certain type of Maggot is something UK fish crave. ( off topic.)
To the optimist, the glass is half full. To the pessimist, the glass is half empty.
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21-06-2016, 10:04 PM #17
Re: Chill Room Evap Leaks.
You chill maggots for the coarse fishermen,basically it slows the process of them turning into flys,ha and if the fridge breaks your stock flies out the door sorry for the pun!!!
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22-06-2016, 05:40 AM #18
Re: Chill Room Evap Leaks.
Interesting with chilled maggots, so you through them into the water as a teaser " as in here is lunch bring it on " . A fishing person would definitely need a chilled bin thingo, for bait otherwise it will fly away.
Best everyone comes here and fishes rivers and at sea and catch real fish.
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22-06-2016, 08:28 AM #19
Re: Chill Room Evap Leaks.
To the optimist, the glass is half full. To the pessimist, the glass is half empty.