Filter drier on wshp

[hvac17011]

What do you guys do on compressor changes on water source heat pumps. I am going to install on LL. The thing will then be on suction side of txv in heat. Will that hurt anything if it doesnt plug up. This is a 5 ton mcquay.

[Elfshadow]

Bi-flow filter drier. We normally use Parker's line in our factory. They have internal check valves so once they trap particles and moisture it does not get blown back in to the system during the reversed cycle.

[hvac17011]

Yeah that was my plan. I wasnt sure about in the heat mode it being on the suction side. The customer bought the compressor and I doubt he will pay to drop unit to change drier

[Elfshadow]

Yeah that was my plan. I wasnt sure about in the heat mode it being on the suction side. The customer bought the compressor and I doubt he will pay to drop unit to change drier

We ship them installed on the LL without a bypass for the most part on our systems.

You could put a couple tees and a check valve to by-pass it in heating. A check valve is not to expensive.

Of course with this you would lose filtration during heating.

[gravity]

it was my understanding that all bi-flow driers had check valves in them

is this not true?

[Elfshadow]

it was my understanding that all bi-flow driers had check valves in them

is this not true?

That was my understanding as well.

[gravity]

now im thinking. how do we know which way is for cooling? lol

never have really payed attention.

[Elfshadow]

they are setup so that it does not matter which way they are sweated in.

[gravity]

so they always filter?

i was thinking it hit a check valve in one direction and bypassed the core so it didnt blow the junk back out.

so your saying they are all built so liquid flows from the outside thru the center of the core and out in both directions?

[Elfshadow]

http://www.emersonclimate.com/europe..._BFK_35033.pdf

When our factory was changing over to work with 410a our lovely engineers did not account for the higher pressures and thus did not put in larger filter driers. Thus I saw a bunch of these fail in the test station. Cut open a fair number of them, so saw how they worked. Pretty neat little devices.

[valdelocc]

a filter/dryer in a WSHP may do more harm than good if left permanently, I rather flush it with rx11 and put it back the way it was.

[nismo1]

a filter/dryer in a WSHP may do more harm than good if left permanently, I rather flush it with rx11 and put it back the way it was.

Please explain ur theory!!!

[Elfshadow]

a filter/dryer in a WSHP may do more harm than good if left permanently, I rather flush it with rx11 and put it back the way it was.

How does it do harm? I'm trying to learn all I can and don't really trust all they have taught me where I currently work.