marko
7 Cubic Foot
Posts: 140
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Post by marko on Oct 21, 2021 18:52:46 GMT
I am beginning repair and restoration on my "new" Kelvinator. It was an SO2 originally, but may have been converted to R12. This appears to me to be an automatic expansion valve. It was located at the evaporator.
Here is the drier. It is Meuller Brass Silica Gel. Would SO2 ever have been used through one of these?
Here is where the refrigerant is metered into the evaporator
And here is the suction header on the evaporator.
All of this looks to me to be a clear case of a direct expansion design. There is no high or low side float. The receiver is just a tank. Could the evaporator been updated? It looks original to me. Any words of knowledge on this one?
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Post by turbokinetic on Oct 22, 2021 12:52:26 GMT
I am beginning repair and restoration on my "new" Kelvinator. It was an SO2 originally, but may have been converted to R12. This appears to me to be an automatic expansion valve. It was located at the evaporator.
Here is the drier. It is Meuller Brass Silica Gel. Would SO2 ever have been used through one of these?
Here is where the refrigerant is metered into the evaporator
And here is the suction header on the evaporator.
All of this looks to me to be a clear case of a direct expansion design. There is no high or low side float. The receiver is just a tank. Could the evaporator been updated? It looks original to me. Any words of knowledge on this one?
Hi there! That's a beautiful setup you've got there. That is indeed an automatic expansion valve, with an adjustment knob. That is very likely to work with many different alternative refrigerants today. The drier was added to work with something other than SO2, because SO2 its self is a drying agent and needs no drier. Back in the day, they could have used R12, R114, or even methyl chloride. That's good because it likely means that the compressor its self hasn't been corroded internally. You'll likely have no problems getting it up and going. Could you share pictures of the whole cabinet and condensing unit? That would help us to better surmise if all if it is original or not. Sincerely, David
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marko
7 Cubic Foot
Posts: 140
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Post by marko on Oct 22, 2021 22:43:07 GMT
Hi David, I appreciate the response. I can post pictures as I go along, but as of now the skid is mostly dismantled, and the compressor is taken apart. I have not looked at the discharge reed, but the suction reed has a rather deep circular wear groove in it. The compressor would not turn at first, but after removing the head and reed plate, i was able to gently free it up. Everything in the compressor is coated in reddish brown oil. There was residual stink in it. The inside of the cabinet bottom had an oil film in it, but no SO2 stink. There was no charge. The mechanical seal is in fair shape, but I am researching getting new parts to repair the seal. I have some promising prospects, but we'll see.
The Delco repulsion start motor is very similar to some of the Frigidaire motors and has a fan on the pulley. It is real v-belt drive, not flat belt. The compressor is a single cylinder. Three of the four skid springs still are with the unit, one is missing. The springs fit the pockets on the skid and the cabinet.
Here is some tag data.
I drove from Louisiana to Indiana to get this box. I loaded it into the pickup truck, single handedly, with the aid of a dolly, a platform jack, some assorted timbers and boards, concrete blocks and a four rope snatch block to skid it along with. Everything went smoothly loading. When I got home however (what could possibly go wrong), "we" had a mishap, and the box, all 700 or so lbs of it, proved that gravity still works. Oops...Well, a bit of bodywork is in order, not too bad, the cabinet is rather poor anyway, so a full restoration is in order. Fortunately, it is painted, and not porcelain.
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marko
7 Cubic Foot
Posts: 140
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Post by marko on Oct 22, 2021 22:55:17 GMT
I wish that I had a drum of F-11 to warsh these parts in...
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Post by turbokinetic on Oct 22, 2021 23:20:19 GMT
Hi David, I appreciate the response. I can post pictures as I go along, but as of now the skid is mostly dismantled, and the compressor is taken apart. I have not looked at the discharge reed, but the suction reed has a rather deep circular wear groove in it. The compressor would not turn at first, but after removing the head and reed plate, i was able to gently free it up. Everything in the compressor is coated in reddish brown oil. There was residual stink in it. The inside of the cabinet bottom had an oil film in it, but no SO2 stink. There was no charge. The mechanical seal is in fair shape, but I am researching getting new parts to repair the seal. I have some promising prospects, but we'll see.
The Delco repulsion start motor is very similar to some of the Frigidaire motors and has a fan on the pulley. It is real v-belt drive, not flat belt. The compressor is a single cylinder. Three of the four skid springs still are with the unit, one is missing. The springs fit the pockets on the skid and the cabinet.
Here is some tag data.
I drove from Louisiana to Indiana to get this box. I loaded it into the pickup truck, single handedly, with the aid of a dolly, a platform jack, some assorted timbers and boards, concrete blocks and a four rope snatch block to skid it along with. Everything went smoothly loading. When I got home however (what could possibly go wrong), "we" had a mishap, and the box, all 700 or so lbs of it, proved that gravity still works. Oops...Well, a bit of bodywork is in order, not too bad, the cabinet is rather poor anyway, so a full restoration is in order. Fortunately, it is painted, and not porcelain.
Wow at that tiny 1/10 HP motor! I will warn you that some of the very low HP motors are underpowered for these units and have a hard time starting. The 1/6 HP ones on the single-cylinder Frigidaires are sometimes not quite up to the task. Sorry to hear about the incident with loading the cabinet to your truck! I've been fortunate not to have had any mishaps with fridge transportation. There have been some near-misses, though! Hopefully that shaft seal can be re-lapped and proves to be usable! Don't despair about the compressor having been stuck. I've had to drive pistons out with a hammer and wood dowel before, and the compressor was able to be rebuilt and put back in service without issues.
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marko
7 Cubic Foot
Posts: 140
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Post by marko on Oct 22, 2021 23:31:45 GMT
Wow at that tiny 1/10 HP motor! I will warn you that some of the very low HP motors are underpowered for these units and have a hard time starting. The 1/6 HP ones on the single-cylinder Frigidaires are sometimes not quite up to the task. Yeah, that is small (but the motor is physically quite large!). I have a 1/6 HP Century repulsion start, but I hate to change horses in the middle of the stream.
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marko
7 Cubic Foot
Posts: 140
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Post by marko on Oct 22, 2021 23:33:01 GMT
I am sorry about the poor editing, I am not familiar with this forumware
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wayne
New Member
Posts: 8
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Post by wayne on Oct 23, 2021 1:23:29 GMT
Hi David, I appreciate the response. I can post pictures as I go along, but as of now the skid is mostly dismantled, and the compressor is taken apart. I have not looked at the discharge reed, but the suction reed has a rather deep circular wear groove in it. The compressor would not turn at first, but after removing the head and reed plate, i was able to gently free it up. Everything in the compressor is coated in reddish brown oil. There was residual stink in it. The inside of the cabinet bottom had an oil film in it, but no SO2 stink. There was no charge. The mechanical seal is in fair shape, but I am researching getting new parts to repair the seal. I have some promising prospects, but we'll see.
The Delco repulsion start motor is very similar to some of the Frigidaire motors and has a fan on the pulley. It is real v-belt drive, not flat belt. The compressor is a single cylinder. Three of the four skid springs still are with the unit, one is missing. The springs fit the pockets on the skid and the cabinet.
Here is some tag data.
I drove from Louisiana to Indiana to get this box. I loaded it into the pickup truck, single handedly, with the aid of a dolly, a platform jack, some assorted timbers and boards, concrete blocks and a four rope snatch block to skid it along with. Everything went smoothly loading. When I got home however (what could possibly go wrong), "we" had a mishap, and the box, all 700 or so lbs of it, proved that gravity still works. Oops...Well, a bit of bodywork is in order, not too bad, the cabinet is rather poor anyway, so a full restoration is in order. Fortunately, it is painted, and not porcelain.
Wow at that tiny 1/10 HP motor! I will warn you that some of the very low HP motors are underpowered for these units and have a hard time starting. The 1/6 HP ones on the single-cylinder Frigidaires are sometimes not quite up to the task. Sorry to hear about the incident with loading the cabinet to your truck! I've been fortunate not to have had any mishaps with fridge transportation. There have been some near-misses, though! Hopefully that shaft seal can be re-lapped and proves to be usable! Don't despair about the compressor having been stuck. I've had to drive pistons out with a hammer and wood dowel before, and the compressor was able to be rebuilt and put back in service without issues.
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Post by cablehack on Oct 23, 2021 8:03:50 GMT
I wish that I had a drum of F-11 to warsh these parts in... Anyone so fortunate should be saving it for use in CA units. It's too good to be washing parts in.
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marko
7 Cubic Foot
Posts: 140
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Post by marko on Oct 23, 2021 8:35:01 GMT
I wish that I had a drum of F-11 to warsh these parts in... Anyone so fortunate should be saving it for use in CA units. It's too good to be washing parts in. Yes, you are correct! Still, in all, it is the best solvent for refrigeration parts that I, personally, have ever used. Back in the day when I serviced old low pressure centrifugal chillers, large drums of it were readily available. Later, R-123 became somewhat more prevalent.
I remember many years ago a mechanic servicing an automobile a/c system flushed the condenser, a parallel pass style, with F-11, and he could not get it out. The solvent just laid there in the bottom of the condenser, which had to be removed and dumped out to rid it of the fluid.
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marko
7 Cubic Foot
Posts: 140
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Post by marko on Oct 24, 2021 18:28:38 GMT
I tested the motor while ago. It was kind of stiff, so I put a couple of tablespoons of 30W non-detergent in the oilers. After that soaked in, I filled em up again with Zoom Spout. The cloth on the motor leads wasn't too bad, so I skint em back and plugged it in. The motor runs nice and smooth. The condenser fan on the pulley was out of whack by a 1/4" or so, so I whacked em back into line. At 1/10 HP, this is a strong motor. It has amazing starting torque. Since it is still mounted to the bare skid, I put a roll of twine under the fan and bumped the motor. It raised the skid of the bench just a bit, and put a dent in the roll of twine. The brushes are still good, and the centrifugal brush lifter/ shorting collar function perfectly. I was not able to stall the motor with wooden sticks and such, so I hope the single cylinder compressor doesn't load it up too bad. The engineers seemed to know what they were a doing on this. BTW, that is the heaviest 1/10 HP motor I have ever lifted, and it out torques the modern day 3/4 horse capacitor run (PSC) motors! Cleaning, shimming, and painting may be all this little big motor needs.
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Post by turbokinetic on Oct 25, 2021 12:43:49 GMT
I tested the motor while ago. It was kind of stiff, so I put a couple of tablespoons of 30W non-detergent in the oilers. After that soaked in, I filled em up again with Zoom Spout. The cloth on the motor leads wasn't too bad, so I skint em back and plugged it in. The motor runs nice and smooth. The condenser fan on the pulley was out of whack by a 1/4" or so, so I whacked em back into line. At 1/10 HP, this is a strong motor. It has amazing starting torque. Since it is still mounted to the bare skid, I put a roll of twine under the fan and bumped the motor. It raised the skid of the bench just a bit, and put a dent in the roll of twine. The brushes are still good, and the centrifugal brush lifter/ shorting collar function perfectly. I was not able to stall the motor with wooden sticks and such, so I hope the single cylinder compressor doesn't load it up too bad. The engineers seemed to know what they were a doing on this. BTW, that is the heaviest 1/10 HP motor I have ever lifted, and it out torques the modern day 3/4 horse capacitor run (PSC) motors! Cleaning, shimming, and painting may be all this little big motor needs. Very nice that the motor runs well! As for the small HP ratings, I have noticed that they seemed to "fudge" the motor ratings back in the day. They may have rated that 1/10 HP meaning that the expected normal load is 1/10 HP from that compressor, on a fully stabilized system. All the manufacturers did this as a way to make people think it would use less electricity. Electricity cost was very high back in this day.
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marko
7 Cubic Foot
Posts: 140
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Post by marko on Oct 28, 2021 22:37:19 GMT
You may wonder why I am posting this old photograph here. It is a result of ongoing research, of which there is very little information available. It is one of the first automobile air conditioning systems. Stay tuned.....
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Post by ckfan on Oct 28, 2021 23:25:34 GMT
Wow, very neat car unit!
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Post by jake on Nov 1, 2021 22:20:03 GMT
Wow,that's really neat! Is that a Packard? Packard boasted about having the first cars with air conditioning! I never saw anything like that before!!
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