alex
New Member
Posts: 44
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Post by alex on Sept 18, 2014 3:01:29 GMT
I meant supco heater
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Post by coldspaces on Sept 18, 2014 4:25:19 GMT
Coldspaces, do you think the Supelco drain heater will work with the CA-2 unit? In looking online, it seems the heating element is 18" long. One would have to fold it up to fit in the space. Is that the case? The price seems better! As you can see in my pic it is folded up to make it fit. I can't say it is as good at transferring heat as a metal heater but the originals were ceramic cased. I have no heat transfer paste on it either yet it did seem to work in the cold garage last winter. I original planed on it being temporary but I brought home so many old frigs since then to spend my time on that I just never got around to getting something better.
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alex
New Member
Posts: 44
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Post by alex on Sept 20, 2014 16:05:57 GMT
THis morning I removed the heater from my machine, noticing that as I pulled it out, all the insulation cracked off the lead wires! Here is a photo. AAKK! How much rewiring will I have to do?? At least the metal wire seems OK. I can use shrink tubing on the exposed wires before putting it back together. As I research new heater sources, I am wondering if any of you has tried a low wattage aquarium heater? or one from here: www.omega.com/pptst/LDC3.html?
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Post by allan on Sept 20, 2014 22:21:02 GMT
THis morning I removed the heater from my machine, noticing that as I pulled it out, all the insulation cracked off the lead wires! Here is a photo. AAKK! How much rewiring will I have to do?? At least the metal wire seems OK. I can use shrink tubing on the exposed wires before putting it back together. As I research new heater sources, I am wondering if any of you has tried a low wattage aquarium heater? or one from here: www.omega.com/pptst/LDC3.html?
I personally think the 3/8 diameter is too small.
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Post by cablehack on Sept 21, 2014 23:12:44 GMT
No surprises with the wiring - one reason I pulled both my cabinet tops apart. You'll have to replace the heater wiring, which can be done simply by attaching new wires to the old and pulling it through. I've only had experience with form B machines, which use the same kind of cable for the compressor and need that replaced as well. But, seeing as you have a form A, I gather from what I've seen here, the wires are separate and don't crumble apart the same way. The problem with using a smaller diameter heater is that there well be less thermal contact between the heater and the compressor well. A lot of the heat produced will just heat the air in the well and not the compressor oil. Lots of silicone grease could be use to pack the void, but it still wouldn't be quite as efficient.
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Post by ChrisJ on Sept 22, 2014 13:20:57 GMT
No surprises with the wiring - one reason I pulled both my cabinet tops apart. You'll have to replace the heater wiring, which can be done simply by attaching new wires to the old and pulling it through. I've only had experience with form B machines, which use the same kind of cable for the compressor and need that replaced as well. But, seeing as you have a form A, I gather from what I've seen here, the wires are separate and don't crumble apart the same way. The problem with using a smaller diameter heater is that there well be less thermal contact between the heater and the compressor well. A lot of the heat produced will just heat the air in the well and not the compressor oil. Lots of silicone grease could be use to pack the void, but it still wouldn't be quite as efficient. Let's not forget though we're dealing with a 12-15W heater. I believe a lot of these cartridge heaters run 100-200W in the same size package.
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Post by cablehack on Sept 22, 2014 23:20:16 GMT
Let's not forget though we're dealing with a 12-15W heater. I believe a lot of these cartridge heaters run 100-200W in the same size package. Indeed, I have a 100W heater that fits the compressor well. I contemplated using it as a last resort when I first got the CA-2. At 120V its power would have dropped to 50W, and with a diode in series, 25W.
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Post by blackhorse on Sept 27, 2014 15:16:08 GMT
Let's not forget though we're dealing with a 12-15W heater. I believe a lot of these cartridge heaters run 100-200W in the same size package. Indeed, I have a 100W heater that fits the compressor well. I contemplated using it as a last resort when I first got the CA-2. At 120V its power would have dropped to 50W, and with a diode in series, 25W. Minor miscalculation there, assuming it's 100 watt at 220v. At 110V the current would drop by half. At half voltage and half current, the watts would drop by 75%, thus 25 watt. Add your diode, you're down to 12.5 watt. Assuming it's not a PTC device. Ohms law, all that. :-)
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Post by ChrisJ on Sept 28, 2014 1:50:43 GMT
Did you take into consideration 0.7v drop across the diode as well?
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Post by blackhorse on Sept 28, 2014 16:00:13 GMT
Did you take into consideration 0.7v drop across the diode as well? Given the nature of rural electrical service, I really doubt a drop of .7v will affect the wattage much. That would be 116.3v instead of 117v., which is considered a good day. I'm just happy when the light in the bathroom doesn't dim enough to affect my reading when the neighbor a half mile away turns on the microwave.......
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Post by cablehack on Sept 29, 2014 10:39:53 GMT
Indeed, I have a 100W heater that fits the compressor well. I contemplated using it as a last resort when I first got the CA-2. At 120V its power would have dropped to 50W, and with a diode in series, 25W. Minor miscalculation there, assuming it's 100 watt at 220v. At 110V the current would drop by half. At half voltage and half current, the watts would drop by 75%, thus 25 watt. Add your diode, you're down to 12.5 watt. Assuming it's not a PTC device. Ohms law, all that. :-) It was 240V 100W. The fridge was being fed with a 120V transformer at the time.
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Post by bhigdog on May 16, 2015 22:47:28 GMT
I have a heater on order from OEM Heaters inc. 3/8" X 2" with 12" leads. 70W @ 240 volts which they assure me will draw 17.5 W @ 120V. Cost was $19.50 USD plus USPS shipping..........Bob
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Post by ChrisJ on May 17, 2015 0:04:47 GMT
I have a heater on order from OEM Heaters inc. 3/8" X 2" with 12" leads. 70W @ 240 volts which they assure me will draw 17.5 W @ 120V. Cost was $19.50 USD plus USPS shipping..........Bob I agree, 17.5 sounds right. $19.50 is hard to beat.
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Post by bhigdog on May 17, 2015 2:30:10 GMT
It's a stock item. Size is a bit smaller than the 7/16 X 2 1/2 I pulled out of my machine. I plan to machine a brass sleeve of the proper size and make that a lite push fit over the heater to improve heat transfer. Hopefully that will fix my machine's over load tripping problem.....................Bob
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Post by bhigdog on Jun 6, 2015 16:05:47 GMT
Well the heater is as advertised. I did make a brass sleeve for it but it didn't help my machine which finally totally died. The good news is I picked up a decent DR-1 with a dead heater. The new one fits it just fine............Bob
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