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I had a S-163 hooked to my Ducane heatpump from 2002 to 2012. Guess what...The Ducane still works. Never had a single issue in the summer with cooling. I removed it last spring for the hell of it, knew it wasn't right for the heat mode. Now let me say, I don't use the heatpump for heat all that often since I am able to heat with coal. But the Ducane still works well. Has a scroll in case you were wondering.

A bi-flow filter dryer is actually TWO filter dryers in one can with back flow valves to ensure that the crud caught does not get washed back into the system when reversing flow. Whack one up and take a look...

Sounds like more pictures are in order when you take the expansion valve loose and see little desiccant balls!!

Originally Posted by ryan1088

What's the numbers look like when you fired it up? I was curious if the desiccant left the drier and stopped up something.

I suspect the expansion valve to be stopped up. I have to go back to the job and figure out if I can figure out how to get the pressure correct, my pressures were all messed up in both heating or cooling mode.

This is a business that is open M-F only, and on Friday's they leave at 4 pm sharp:.

Let me guess. It's a Sporlan too? I noticed the diaper they have put on the outlet side of the new ones to beat the ALCO demo that showed them releasing the crud caught around the ends when the pressure backed off?
Now that they have been bought maybe their parent company will replace them with theirs. P/H has great filter/driers.

What's the numbers look like when you fired it up? I was curious if the desiccant left the drier and stopped up something.

Originally Posted by NY2GA01

but this was a heat pump, so the use of a one way filter is like having no filter at all.

Still not a 100% on if it killed the compressor.

Well, it'll definetly filter in the cool mode. I'm not sure if the moisture or contaminants gets pushed back out of the dryer during the heat cycle or the refrigerant simply flows around the core!! Maybe Andy Schoen or somebody could explain?

Originally Posted by KB Cool

Got a walk-in freezer out there that's been running for at least 10 years with the dryer piped in backwards. I think it just doesn't filter properly being installed in the wrong direction and has no affect on flow!

but this was a heat pump, so the use of a one way filter is like having no filter at all.

Still not a 100% on if it killed the compressor.

Got a walk-in freezer out there that's been running for at least 10 years with the dryer piped in backwards. I think it just doesn't filter properly being installed in the wrong direction and has no affect on flow!

Originally Posted by NY2GA01

Found this on a heat pump. need I say what's wrong? Not sure if this is what killed the compressor or not.

Maybe he thought your supposed to replace it every spring and fall.

Originally Posted by dandyme

did anything fall out of the drier when you removed it (hopefully you cut it out instead of unsweating it)?

I did cut it out, and no, nothing came out.

did anything fall out of the drier when you removed it (hopefully you cut it out instead of unsweating it)?

Originally Posted by air1

The 250 psi is relative to atmospheric pressure. The differential pressure across the drier is almost zero. So the amount of resistance to flow should be no different than blowing through it with your mouth.
I think the difference is in the configuration of the screens and desiccants.

Correct.

Originally Posted by GJ-HVAC/R

Lol. It might help to have a bi flow. I went to a call after a fellow tech installed a straight cool filter/dryer backwards. I showed it to him. and he blew through it backwards and said "whats the difference"? I said blow through it at 250 psi

The 250 psi is relative to atmospheric pressure. The differential pressure across the drier is almost zero. So the amount of resistance to flow should be no different than blowing through it with your mouth.
I think the difference is in the configuration of the screens and desiccants.

So what direction did he choose?

Lol. It might help to have a bi flow. I went to a call after a fellow tech installed a straight cool filter/dryer backwards. I showed it to him. and he blew through it backwards and said "whats the difference"? I said blow through it at 250 psi

Originally Posted by dandyme

you'll know when you cut that puppy out of there.

What?

I replaced it with the correct bi flow filter drier when I replaced the compressor today. I can't believe it took a few years to kill the compressor.

Originally Posted by air1

What's the difference between a bi-flow and a uni-directional? Would a uni-directional prevent flow in the opposite direction?

Yes it would.

http://www.thefreedictionary.com/unidirectional

http://www.youtube.com/watch?v=O_05qJTeNNI

What's the difference between a bi-flow and a uni-directional? Would a uni-directional prevent flow in the opposite direction?

you'll know when you cut that puppy out of there.

Found this on a heat pump

Found this on a heat pump. need I say what's wrong? Not sure if this is what killed the compressor or not.