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Coolerking

Member Since 11 Jul 2004
Offline Last Active Today, 03:27 PM
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Posts I've Made

In Topic: Summer Solstice...124'F. Good a reason as any to go sailing today

21 June 2016 - 12:04 AM

On the 4th of June I was at race mile 214.6 at the SCORE Baja 500 doing work.

It was 120.6f at 11:59 am. In the shade.

We lost the thermometer at 125.

We think it was 130 at least in the sun.

It was a different kind of hot. And bees......millions of honey bees. We were wearing 20-30 of them each for 4-5 hours.

Crazy.


In Topic: Time to Replace the Frig - Looking for Advice

01 June 2016 - 01:50 PM

If the low side was in a vacuum, then it either had a leak, or was undercharged by accident or on purpose.

Keep in mind that the pressure determines the evaporator temperature, so when we have 6- 7lbs, we are around 0 degrees F. Add an average of 15 degrees to that because the plate temp and the box temp are two different animals. 15 is about the average temp differential we see between any plate and the box temp.

That is a good place to start. There is nothing wrong with it running in a vacuum, as long as its leak free, it just means a colder plate, but on this type of box/system its really not needed.

Some of the stuff we build for large yachts use R404A, which at the same pressure 6-7lbs, gives us a -40F evaporator! At 10InHg vac R404A is almost -70F!

Fun stuff.

Cheers!


In Topic: Horrific

25 May 2016 - 10:23 PM

Lock up the kids until they sound like morgan freeman in front of the shawshank parole board.

Lock up the parents too.

For effect.

Do it EVERY TIME THIS SHIT HAPPENS.

YOU HAVE KIDS?

Guess what...you have to teach them....one way or the other.

NO FUCKING EXCUSES.

End of story.


In Topic: Time to Replace the Frig - Looking for Advice

19 May 2016 - 10:16 PM

 

 

 

if you need one the filter drier you would add is an 032, or a spun bullet drier, either will work. it goes in the liquid line between the evap and the compressor, you will need 2ea 1/4 male flare nuts

Thanks!
 
There is some sort of filter looking thing that is already tapped into the high pressure side of the system but it's all soldered in place and does not look serviceable. I'll take a pic and post.

You've sorted this out just in time to help me fix the one in the Tartan. ^_^
You can show me the cruiser's secret handshake.

Sure but what boat is the Tartan???

 

I am in the Marine refrigeration biz, let me know what info you need. I get a kick out of helping folks fix stuff.
The soldered thing you see is a bullet drier, they come pre installed on nearly every unit of this type.
They have a lifespan that begins to tick away the first time someone opens the system to the atmosphere.
If the unit gets ANY air or moisture in it, like say a leak on the low side to the point that when its running in a vacuum, its basically pulling air in, then the lifespan is really short, like hours instead of decades.
Once it gets, what we call, "non-condensables" in it, then all sorts of bad things start happening, acids form in the oil as it breaks down, this in turn can screw up the compressor motor windings and can also simply plug the captube.
All in a days work.

 

So are you saying once the bullet drier fails then the entire system is fucked? Why is the system not designed for that to be a serviceable filter?

 

Been running like a champ for a week now!

 

That's great! But the spun driers have only so much to give before they go bad, again, this is 20+years on a good sealed system that hasn't been messed with, like your fridge at home, right?

Marine refrigeration systems are a different deal, flare fittings, quick disconnects, vibration, salt, power issues, lack of cooling on the condenser, these all conspire to age things faster than a normal household system.

It sounds like you guys pulled a good vacuum on it and that is huge, you now have a nice clean dry system,(we hope). You can replace the drier pretty easy if it comes to that, the pressures on a 134 system are such that soft solder can be used, the trick is to not run it when its not dry, or to ignore problems and forcing the unit to run hot. 

It might work for years, and it might not....but its working now, which is awesome, so fill it with adult beverages and leave it alone!


In Topic: Time to Replace the Frig - Looking for Advice

19 May 2016 - 02:46 PM

 

if you need one the filter drier you would add is an 032, or a spun bullet drier, either will work. it goes in the liquid line between the evap and the compressor, you will need 2ea 1/4 male flare nuts

Thanks!
 
There is some sort of filter looking thing that is already tapped into the high pressure side of the system but it's all soldered in place and does not look serviceable. I'll take a pic and post.

You've sorted this out just in time to help me fix the one in the Tartan. ^_^
You can show me the cruiser's secret handshake.

Sure but what boat is the Tartan???

 

I am in the Marine refrigeration biz, let me know what info you need. I get a kick out of helping folks fix stuff.
The soldered thing you see is a bullet drier, they come pre installed on nearly every unit of this type.
They have a lifespan that begins to tick away the first time someone opens the system to the atmosphere.
If the unit gets ANY air or moisture in it, like say a leak on the low side to the point that when its running in a vacuum, its basically pulling air in, then the lifespan is really short, like hours instead of decades.
Once it gets, what we call, "non-condensables" in it, then all sorts of bad things start happening, acids form in the oil as it breaks down, this in turn can screw up the compressor motor windings and can also simply plug the captube.
All in a days work.