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SMC Discussion Areas > Trouble-Shooting > Refrigeration (Moderators: johnieG, Jim) > 1/3 hp TO REPLACE A 1/4 hp
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Author Topic: 1/3 hp TO REPLACE A 1/4 hp  (Read 9143 times)
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markinaz
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« on: May 13, 2011, 12:59:29 pm »
Greetings gents.  Lots of good info on your site- I like it!

I'm working on my 1st machine, a Cavalier CSS-80.  The compressor went shortly after cleaning it up and putting it into service in my garage.  :-(   The compressor is shot.  It measures about 15 amps before it trips the cut-off.  I believe its a 1/4 HP.  1st question- Is it OK to replace it with a 1/3 hp? 
I plan to convert the machine over to R134A and then add a larger condenser to insure adequate cooling.  I assume the old data plate which specified 16 oz of R-12 is not accurate for several reasons now.  I'm hoping the proper amount of R134a will become obvious by observing the pressure.  Is that correct?

Thanks,
Mark
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mznb1u
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« Reply #1 on: May 13, 2011, 02:01:40 pm »
Mark,

Welcome to the site. happydrinkers  You will find that this is a very helpful forum.  I am sure that one of the experts will have some advice for you on your compressor/refridgerant questions.  Another option would be to call Global Compressors--a site sponsor.  I am sure they could point you in the right direction.

 drinking Tim drinking
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globalcompressors
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« Reply #2 on: May 13, 2011, 04:53:36 pm »
No Sir...don't do it.

The condenser, evaporator and the cap tube are all designed for 1/4hp.
It's kinda like putting a Ford 460 block into a Pinto without changing the
radiator...

Stick with a 1/4 hp compressor and save yourself a ton of heartache, time
and cash.
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how's that OBAMA CARE workin' out for ya?
markinaz
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« Reply #3 on: May 13, 2011, 06:09:38 pm »
More power!!  OK, maybe not this time I guess. 

So what about when you go green?  I mean converting to R134a.  Is it a problem for these machines.  I read they don't cool as well with the original condensers still in them.  If I'm gonna be brazing I might as well plan ahead & compensate now while its all appart.

Mark
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Yarochrehc
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« Reply #4 on: May 13, 2011, 07:39:43 pm »
It is true, the system is designed for a 1/4 HP, if you put a 1/3 HP compressor in it your just asking for trouble!
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Bob

Restored
Vendo H63B  Coke in use in basement
Original
Vendo V/VF63/7  Pepsi in use

Restoring: Glascock Standard
(2) Vendo 63
(2)Vendo 90
Vendo 126  waiting for paint
VMC 56
Westinghouse WE-6
globalcompressors
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« Reply #5 on: May 14, 2011, 07:14:55 am »
Mark,

As long as you change the drier and go with a 134a compressor,
you won't have any issues. There are other refrigerant alternatives
as well but, 134a is the industry standard.
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how's that OBAMA CARE workin' out for ya?
markinaz
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« Reply #6 on: May 17, 2011, 12:03:25 am »
I like that reply Global.  I think I have my plan now. 

So my updated shopping list includes:

1/4 hp 134a compressor
New dryer
Schrader "T" valves (for high & low side)
Vacuum pump
Freon
Oil (for 134a)
Gauges
Brazing supplies

It should be a nice weekend project.
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