TXV Orifice size

[_hl4e_halflife_]

Im building a Heatpump for my bedroom and i can't figure out what size orifice is for a 1hp system. I have several orifices they are: 0,00,01,03. So what # is for a 1hp?

[ambarton]

two things i dont like to hear: im building a heatpump and i dont understand

[_hl4e_halflife_]

Originally posted by ambarton
two things i dont like to hear: im building a heatpump and i dont understand

What do u mean when u say u don't like to hear "im building a heatpump"? ,and what is it you don't understand?

[Edited by _hl4e_halflife_ on 08-25-2006 at 09:19 PM]

[badfrog]

I think he means WTF do you mean, how do you build a heat pump? could you be a little more specific?

[4l530]

I thought the TXV was the orifice. And it was based on tonnage rather than hp. Those orifice sizes look pretty small. I guess this must be a mini-split?

[smokin68]

Originally posted by _hl4e_halflife_
Im building a Heatpump for my bedroom and i can't figure out what size orifice is for a 1hp system. I have several orifices they are: 0,00,01,03. So what # is for a 1hp?


Good one. Are those welding tips???Build a humidifier next, toilet paper through the toilet and across the bathroom fan should work.....

[_hl4e_halflife_]

Originally posted by badfrog
I think he means WTF do you mean, how do you build a heat pump? could you be a little more specific?


Well for anyone that has worked on a heatpump before should know how make one. Heres some pics on the progress of mine.


http://img245.imageshack.us/img245/2056/compressorgd3.jpg

http://img201.imageshack.us/img201/2205/outdoorcoilum1.jpg

http://img201.imageshack.us/img201/3792/fanshroud1dd3.jpg

http://img201.imageshack.us/img201/4176/indoorcoilmo9.jpg

http://img201.imageshack.us/img201/270/outdoortxvld4.jpg

http://img201.imageshack.us/img201/2971/reversingvalvetn9.jpg

http://img201.imageshack.us/img201/9599/indoortxvdd7.jpg

http://img201.imageshack.us/img201/1382/outdoortxv1hc2.jpg

[Edited by _hl4e_halflife_ on 08-25-2006 at 10:43 PM]

[ascj]

http://img171.imageshack.us/my.php?image=compressorpu3.jpg

[coolmist]

This should be good!!!!!!!!

[_hl4e_halflife_]

This is one of my hobbies building refrigeration stuff.I have 2 Cascade systems,2 liquid chillers 1 with duel compressors,1 10000Btu AC,1 CPU DD system,and 1 single stage system that can reach -80c or more evap temp. So now im building a Heatpump to add to that list.

[toddgotfish]

keep us posted on the progress, i like it.....do you have a SEER rating for it yet??
a 3.5 ton is around a 78 orifice , and a 4 ton an 82 . don't know if that is of any help to you though.

[4l530]

Originally posted by _hl4e_halflife_
http://img201.imageshack.us/img201/270/outdoortxvld4.jpg
The condenser (in cooling) I assume.
http://img201.imageshack.us/img201/9599/indoortxvdd7.jpg
The evaporator (in cooling) I assume.
Something about this one doesn't seem quite right. Can't put my finger on it. I may just be having a dumba** attack.
-----------------------------------------------------------
Using a TXV as the metering device for both modes, you shouldn't need an orifice. But the TXV does need to be sized for the system, like an orifice would be. Is this what you were asking about originally?
BTW if this did have an orifice, I'd probably use....maybe about a 40?

[Edited by 4l530 on 08-25-2006 at 11:44 PM]

[_hl4e_halflife_]

Originally posted by 4l530
Originally posted by _hl4e_halflife_
http://img201.imageshack.us/img201/270/outdoortxvld4.jpg
The condenser (in cooling) I assume.
http://img201.imageshack.us/img201/9599/indoortxvdd7.jpg
The evaporator (in cooling) I assume.
Something about this one doesn't seem quite right. Can't put my finger on it. I may just be having a dumba** attack.
Using a TXV as the metering device for both modes, you shouldn't need an orifice. But the TXV does need to be sized for the system, like an orifice would be. Is this what you were asking about originally?

Your correct about the coils the taller one is outside the house.

These are the TXV orifices that im talking about

http://img201.imageshack.us/img201/8003/orificesjd9.jpg

And yes these are what i was originally asking about. They have there sizes labeled on them in this case 0,00,01,03 i just don't have a chart to see what there tonnage is

[4l530]

When you say 'orifice' I was thinking 'flowrater piston'
I'm not the expert on what you're doing with that TXV but I'd think you'd want to use the smallest one for what you're doing there. JMO.

[_hl4e_halflife_]

Originally posted by 4l530
When you say 'orifice' I was thinking 'flowrater piston'
I'm not the expert on what you're doing with that TXV but I'd think you'd want to use the smallest one for what you're doing there. JMO.

Well i do know that the smallest one i have is for a 1/4hp R22 system and that would be the 0 or the 00....i know the way they label these things is just stupid.

[jacob perkins]

I dont care what ya do...but since you come here to ask I will respond.

We only see one coil. is that the conditioning (indoor)coil? whatever it is ...would be better to redesign it to get full coverage air flow.back that fan away from the coil. Also, that type of fan is better to pull air across a coil than to push it. you need to use about that much space shown for just the blower and coil. a squirell cage blower is better to push air thru coil. and for the condensing coil you will need plenty of air.

remember that you will need by-flow valves, or check valves and by-passes for the reverse flow. The byflow are easier.

[RoBoTeq]

That's just a restrictor orifice to keep the txv from getting slammed with refrigerant. Depending on the capacity range of the txv I would use the one that corolates closest with the one ton capacity of the system you are building.

In other words; if the txv is rated from 1-2 ton of cooling, use the smallest orifice. If the txv is rated at .5-1 ton, use the largest orifice. If the txv is rated from 3/4-1.5 ton, use the middle orifice.

[_hl4e_halflife_]

Originally posted by jacob perkins
I dont care what ya do...but since you come here to ask I will respond.

We only see one coil. is that the conditioning (indoor)coil? whatever it is ...would be better to redesign it to get full coverage air flow.back that fan away from the coil. Also, that type of fan is better to pull air across a coil than to push it. you need to use about that much space shown for just the blower and coil. a squirell cage blower is better to push air thru coil. and for the condensing coil you will need plenty of air.

remember that you will need by-flow valves, or check valves and by-passes for the reverse flow. The byflow are easier.

Whay do u mean u only see 1 coil?? theres pics of both coils on the first page. The outdoor coil is alot taller and is 3 passes thick. The indoor coil isn't as tall but its 4 passes thick.

I dono which fan ur refering to but the bigger steel fan on the outdoor coil is 3&1/4" away from the coil. The fan motor spins at 1625rpms and pulls alot of air through the coil so i don't believe airflow will be a problem

Both fans pull the air through the coil and over the motor which is the right way and also helps to cool the compressor.

About the reversing flow if u look in both pics with the indoor coil and outdoor coil you can see a line on both pics that bypasses the TXV's theres a 1-way valve in those bypass lines. I had to make 1 of those 1-way valves from scratch.



[Edited by _hl4e_halflife_ on 08-26-2006 at 10:01 PM]

[_hl4e_halflife_]

I just found this today and this is what i was orignally talking about:

http://img170.imageshack.us/img170/1354/txvchartyz8.jpg

So according to this chart i need a #02 Orifice.Im surprised noone around here knew this.