Weird service calls.

Doc Holliday · 03-21-2011, 07:25 AM

At me sisters house yesterday she had her Payne heat pump (that I installed some 7 years ago) out on low pressure, the thing had zero freon in it. Took the cover off along with the service panels, shot some nitrogen in it to reveal the small (almost cap tube size) copper tube from the receiver used to check levels during heating mode had rubbed against the low pressure line leading to the receiver and both lines had holes in them. Brazed them both, wapped the big line in insulation so they don't rub again, shot some more nitrogen in it to 150 psi for a pressure check, pulled vac down to 400 microns, filled with some freon (heard the switch click close) and everything's fine.

Never come across that before.

Hubcap626 · 03-21-2011, 02:02 PM

I see where copper lines rub into other copper or electrical bx all the time.

unicursalhex · 03-22-2011, 02:25 AM

Did you pull to 400 with system isolated from pump or 400 micron with pump still running? The reason I ask is that to get to 500 for me with the lines isolated from the pump it takes many hours. If I have a full day on the job I'll pull 500- isolated but its usually 500 with the pump still running. Thats with quad hose gauges and 7 cfm pump.

**beenthere** · 03-22-2011, 05:55 AM

Thats not a receiver. Its an accumulator. They have different purposes.

but that line rubbing through is a common thing.

Doc Holliday · 03-22-2011, 08:16 AM

Quote:

Originally Posted by beenthere

Thats not a receiver. Its an accumulator. They have different purposes.

but that line rubbing through is a common thing.

Yesterday I purchased a quick pick lottery ticket for the mega lotto with a cash option of 155 million for today's drawing. If I win, I'm sending you 1 million, no questions asked.

Ah screw it, you can have 2 mill.

Thanks.

Doc Holliday · 03-22-2011, 09:43 AM

Beenthere, I don't know why I said receiver, the boss was with me out at my sister's place and he said it was an accumulator. I guess I just thought they did the same thing, accumulate or receive liquid to protect the compressor.

Would you (or anyone) mind explaining the difference along with where we'd find a receiver versus an accumulator? It's not just a heat pump thing in other words, right?

Thanks.

Road.house. (I thought I'd finally let you know it was me.

)

hvaclover · 03-22-2011, 12:34 PM

accumulator protects the system against slugging of liq refrig.

A receiver is a holding vessel that contains the system charge.

Receivers are usually not included in systems smaller than light commercial for ac but most refer condensing units (even fractional HP units) use them as a matter of course.

Horizontal Receiver

yuri · 03-22-2011, 07:42 PM

Accumulator is in the suction line before the compressor and catches any liquid refrig which may slug back to the compressor. Receiver is after the condensor and holds liquid refrigerant. Used in low temp refrigeration not medium temp AC.

**beenthere** · 03-22-2011, 08:48 PM

[quote=Doc Holliday;61447
Thanks.

Road.house. (I thought I'd finally let you know it was me.

)[/quote]

I knew, I can see you IP.

**beenthere** · 03-22-2011, 08:49 PM

Quote:

Originally Posted by yuri

Accumulator is in the suction line before the compressor and catches any liquid refrig which may slug back to the compressor. Receiver is after the condensor and holds liquid refrigerant. Used in low temp refrigeration not medium temp AC.

Also used on some high temp applications. Such as high pressure chillers/condenser barrel units.

Doc Holliday · 03-22-2011, 10:52 PM

Quote:

Originally Posted by beenthere

I knew, I can see you IP.

Fine, 3 mill.

unicursalhex · 03-23-2011, 12:06 AM

eee burn

Doc Holliday · 03-23-2011, 04:58 PM

Quote:

Originally Posted by unicursalhex

eee burn

Not a burn in any way, more of a "Dang, you know that too..??"

**beenthere** · 03-23-2011, 05:13 PM

Quote:

Originally Posted by Doc Holliday

Not a burn in any way, more of a "Dang, you know that too..??"

You chose a name that a factory tech rep uses on other sites. And from your post, I knew you weren't him, and when you said you know me from other sites, I looked for matching IPs on another site. You know what name came up.

Doc Holliday · 03-23-2011, 05:40 PM

Quote:

Originally Posted by beenthere

You chose a name that a factory tech rep uses on other sites. And from your post, I knew you weren't him, and when you said you know me from other sites, I looked for matching IPs on another site. You know what name came up.

Bwalley?