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I am referring to the type of metering device that meters in both directions, one expansion valve for cool same expansion valve for heat. its only on units that would have had a very short liquid line. Water source heat pumps and package units mostly. in this case the liquid line is only really the liquid line in one mode. where to put it?

Originally Posted by toocoolforschool

Small capacity filter (factory installed) will actually clog up prematurly if system is not propery prepped, insuring premature failure of compressor.

So will a 16 cu inch. Not being a prick but not sure what your point is?

Charge to the data plate on the condenser, and then add for the line set.

unless its a package unit how do you charge to the factory plate

Originally Posted by ar_hvac_man

I agree. I dont like internal driers on any brand. I assume they do this because many contractors are to inept or lazy to install one on their own.

Small capacity filter (factory installed) will actually clog up prematurly if system is not propery prepped, insuring premature failure of compressor.

Originally Posted by Birmingham

not to hi-jack thread but where do you put the liquid line filter drier in a unit with a bi-flow metering device? from the factory i have never seen on installed.

You install a bi-flow drier...on the liquid line. When there is no factory installed drier I like to put them inside close to the air handler. They will function fine anywhere on the liq line but the paint wont fall off and rust when theyre inside.

Originally Posted by slctech

I stand corrected....I was looking at the muffler, didnt squint hard enough to see the cute little copper spun drier hiding down by the liquid line shut off valve...what a crappy place to put it.

I agree. I dont like internal driers on any brand. I assume they do this because many contractors are to inept or lazy to install one on their own.

I've had a lot of leaks on those internally installed (non-copper) filter driers inside condensers on these specific York system in this specific development that are about 6-7 years old. When i check the charge and its quite low the filter drier is the first place i check on these systems then the evap coil.

Why can't you pump down a micro channel style condenser as long as it is not more than the factory charge?

Move the filter drier inside and install approx. 6" from the txv. No rusting and better protection of metering devices.

Originally Posted by ar_hvac_man

Yes, there is a muffler. Its on the DISCHARGE line. The drier is on the LIQUID line. Its a "pencil" type filter drier.

I stand corrected....I was looking at the muffler, didnt squint hard enough to see the cute little copper spun drier hiding down by the liquid line shut off valve...what a crappy place to put it.

not to hi-jack thread but where do you put the liquid line filter drier in a unit with a bi-flow metering device? from the factory i have never seen on installed.

trane compressor had been changed out by someone who didnt know what they were doing installed liquid line filter drier 6 inches from compressor discharge also cut down the discharge from 1/2 inch into a 163s drier. I got the call for no cooling condenser fan motor had locked up compressor pumped so hard before it went out on overload that it blew the teflon seal out of the roto-lock must have blown a cup of oil out into the unit. please dont install liquid line filter driers in the hot gas discharge line.

Originally Posted by gravity

york used to put the drier right at discharge on compressor. there are driers rated to handle this but the capacity of the drier drops.

I've had a York package unit blow the glass outta the compressor in Afghanistan bc the filter drier was on the discharge line and it was completely blocked... 165 degree odt and condenser coils dont play nice together

york used to put the drier right at discharge on compressor. there are driers rated to handle this but the capacity of the drier drops.

the drier is on the liquid line right before it leaves the inside of the unit. i can see it in the picture. about 1-1/8" round and 6" long

Originally Posted by slctech

Per the Luxaire parts list and diagram, that is definitely a MUFFLER, not a LLF. The parts states the LLF is a field installed extra that can be ordered.

Here is the link to that for questions...
http://m.master.ca/documents/0035_22747_001_c_0411.pdf

This is for the York branded unit, but the exact same as the Luxaire.

Getting technical, should be in the Pro forum.

Yes, there is a muffler. Its on the DISCHARGE line. The drier is on the LIQUID line. Its a "pencil" type filter drier.

The real danger is a hydraulic burst.

Same reason they warn us about overfilling recovery cylinders.

If you leave no room for expansion and you fill to the brim and then the hot sun comes out.........boom.

Originally Posted by Baycienda

Do any of you know of any threads where it has been discussed pumping down microchannel coils?

By using the condenser and compressor to pull the refrigerant into the condenser with no ill effects. I know Copeland and Microchannel coil manufacturers would say no, but they have to do it. Who's seen a failure by doing it? Or is it just factory bs? This should be a new thread. There are a lot of things that we do that aren't quite to manufacturers recommendations, but are always done and have been there for years and years. Because frankly they're trying to cover their butts. My vote is to pump down a micro channel coil, depending upon line set length.

As long as you can put your gauge on the discharge line (not liquid line), and keep your hand near the disconnect, you should be able to safely fill up the condenser with as much refrigerant as will fit. Just keep an eye on your gauges and be ready to cut the power once the discharge pressure starts spiking up.

This assumes that you know the difference between the discharge line and the liquid line. Don't ever put a filter-drier on the discharge line (unless it is hollowed out and empty and says "muffler" on it.

Originally Posted by slctech

Per the Luxaire parts list and diagram, that is definitely a MUFFLER, not a LLF. The parts states the LLF is a field installed extra that can be ordered.

Here is the link to that for questions...
http://m.master.ca/documents/0035_22747_001_c_0411.pdf

This is for the York branded unit, but the exact same as the Luxaire.

Getting technical, should be in the Pro forum.

Yes, part number 11 is a muffler, and part number 8 is a filter drier. And it is in the unit.

Per the Luxaire parts list and diagram, that is definitely a MUFFLER, not a LLF. The parts states the LLF is a field installed extra that can be ordered.

Here is the link to that for questions...
http://m.master.ca/documents/0035_22747_001_c_0411.pdf

This is for the York branded unit, but the exact same as the Luxaire.

Getting technical, should be in the Pro forum.

Originally Posted by myhvacx

Attachment 314111

This one didnt, it had a muffler but no drier inside the condenser..

This image by the way was taken as it was being installed, so dont kill me if you can see the crankcase cables just sitting there.

Take a closer look my friend. That enlarged copper cylinder thats exiting the unit on the liquid line, not the discharge line, is indeed a filter drier. Get rid of it and install new drier OUTSIDE the unit.