MATSU:banana::banana::banana::banana:A compressors any good?

[kalen]

I keep seeing these things on ebay, are they any good?
Im thinking of putting together a phase change, and i want to keep costs low.

Ive been playing around with electronic thermo tables that came with my thermo text. It has r290 so ive been trying to map out a T-S diagram of my possible system. This has led me to the question: How do you find the compression ratio for these compressors? and also, can you run multiple compressors in series to acheive a greater temperature difference with a single stage?

Thanks!
Kalen

[gclg2000]

Yah they are good, I've ordered 2 of them before.

[LostInSpace278]

The matsu s h i t a compressors I have seen on e-bay lately have been 1/5 hp or there abouts. They are still good compressors for DD systems. It would keep the cost of a DD system down. I may be wrong, but I think you could not exploit the full potential of what ever refrigerant you decide to use with a 1/5 hp compressor.

[total_assault]

Watch out though, I ordered a matsu off ebay and it looked new and had rubber plugs on the suction and discharge lines, but it was striped nude, meaning no rubber mounts and nothing electrical what so ever.

[gclg2000]

ya, $15 for a 3-in-1 start capacitor and $5 for the rubber footings.

[chilly1]

ya, $15 for a 3-in-1 start capacitor and $5 for the rubber footings.
DOn't forget a run capacitor for these puppies or they will over heat.

[kalen]

Hmmm Id like to have more capacity than 1/5 hp. I cant find a HP rating anywhere in the auction. can you calculate it from capacity and COP? which #'s do you use?

Does anyone know how to find the compression ratio? Or if you can use these things in series?

Thanks for all the replies so far

-Kalen

[gclg2000]

I've seen chilly use these things on stages 2 and 3 of a 3 stage GPU cooler...that he built for teh ATI event. Don't know how that turned out. But they are 4000btu i think right? That's 1/3 ton and i would say more closer to 1/3 HP.

Not sure were someone got 1/5hp but it could be 1/5hp @ 4000btu's.

4000 btu's is plenty to use on a phae change system.

[LostInSpace278]

Sorry about saying it was 1/5 hp. It was a month ago when I looked those specs up. My memory was a little foggy.

I'm suprised the compressor was stripped naked, on the matsu s h i t a website it specifically states that it comes with a start capacitor and a mechanical relay.

[Stewie007]

Watch out though, I ordered a matsu off ebay and it looked new and had rubber plugs on the suction and discharge lines, but it was striped nude, meaning no rubber mounts and nothing electrical what so ever.

No electrical what-so-ever? I'm sure it at least had something to make a connection with.

[gclg2000]

it has the raw S, C, R pegs.

[kayl]

I've seen chilly use these things on stages 2 and 3 of a 3 stage GPU cooler...that he built for teh ATI event. Don't know how that turned out. But they are 4000btu i think right? That's 1/3 ton and i would say more closer to 1/3 HP.

Not sure were someone got 1/5hp but it could be 1/5hp @ 4000btu's.

4000 btu's is plenty to use on a phae change system.


they come in 1/5 1/5+ 1/4 and 1/3 and some high also i think.



DOn't forget a run capacitor for these puppies or they will over heat.

what valve ya recoment. i want to try one.
how does the run cap make it work lighter, or is this only in cascades for large loads. or in singles as well.

[Stewie007]

it has the raw S, C, R pegs.

'Sactly.

Just thought he ought to know that not all compressors are built to the same specs. Some of them are meant for control by a panel, instead of a connected box. It doesn't mean it ain't new. :)

[JSU]

DOn't forget a run capacitor for these puppies or they will over heat.

a 3in1 has a run capacitor also i believe..

[gkiing]

the matsush|ta compressors (aka panasonic) are good little units, I've got a few of them and they'l pump everything I throw at them, and seem to be more reliable than alot of these new ones from copeland, tecumseh etc. The older matu:banana::banana::banana::banana:a's are really reliable.

[chilly1]

a 3in1 has a run capacitor also i believe..
A 3 in one is only a start capacitor.. it is designed for CSIR (Capacitor Start Induction Run) motors. Most Rotaries and larger compressors for efficient operation and to reduce EM heating are designed with a run cap in mind. The Common Rotary Compressor in most window units has a Run cap and no start cap A Run cap stays in the power circuits all the tim where a start cap drops out in a sec or so. For proper operation of a rotary using a 3 in 1 we need to add a capacitor of the proper value between the S and R terminals. So for instance the manafacturer specifies a 25 uF 370 V cap we need to have this in place as well as a starting circuit.

[JSU]

A 3 in one is only a start capacitor.. it is designed for CSIR (Capacitor Start Induction Run) motors. Most Rotaries and larger compressors for efficient operation and to reduce EM heating are designed with a run cap in mind. The Common Rotary Compressor in most window units has a Run cap and no start cap A Run cap stays in the power circuits all the tim where a start cap drops out in a sec or so. For proper operation of a rotary using a 3 in 1 we need to add a capacitor of the proper value between the S and R terminals. So for instance the manafacturer specifies a 25 uF 370 V cap we need to have this in place as well as a starting circuit.


so we should use 25uf 370v run caps? are you talking about rotaries?

[Stewie007]

This makes me thankful my compressor came prewired with a Start and Run Capacitor :p

[total_assault]

No electrical what-so-ever? I'm sure it at least had something to make a connection with.
There were and are bare pins but no overload, no relay, and def. no run cap.

[Stewie007]

Like I said. It was probably manufactured for control panel application. The compressors I use at work for a pumpout has a little box with 3 connections. All the main electricals are in a separate control panel. Overload, capacitors, etc etc.

Edit: And when I say "little box" I just mean a small box with a cover. Nothing special.

[total_assault]

so we should use 25uf 370v run caps? are you talking about rotaries?
I think he was using that as an example value, and it looks like we are talking about the same compressor i bought. this one correct http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=71259&item=7504453435&rd=1&ssPageName=WDVW ? it fits the descripition correctly matsu and 4k btu, i have the link for the data sheet rite here http://panasonic.com/industrial/appliance/pdf/qa110k27cau6.pdf . And as i said twice before what you see in the picture is what you get, no mounts, no relay/overload

[total_assault]

http://featservers.com/pic/PDRM0524.JPG here is how i recieved the compressor bare like in the picture, while at rite you see the other compressor from ebay with the cover over the relay and overload it came with

[gkiing]

Heh, no mounting feet either. That's a pain in the ass.

[Stewie007]

http://featservers.com/pic/PDRM0524.JPG here is how i recieved the compressor bare like in the picture, while at rite you see the other compressor from ebay with the cover over the relay and overload it came with

I'm not debating whether your compressor came bare or not.

[kalen]

Thanks for all the input guys.

does anyone know where i can find out if it is safe to run compressors in series with intercooling? Also where can find information on properly sizing the metering device? it seems to me that a very long/small cap tube would give you your maximum pressure/temp diff but at the cost of capacity. is there a point at which too long of a cap tube can cause damage/malfunction to other parts of the system? Im starting to get more excited about cooling hardware than computing hardware! :D

-Kalen

[total_assault]

I'm not debating whether your compressor came bare or not.
srry to sound like i think that, but I thought this was the exact compressor this thread is about, and i want to show how mine came to me...

[JSU]

so what size run cap is required for these?