Calculate capilary tube for R410

[glavca]

Heloo

Perhaps who have program or formula to calculate lenght capilary tube for heating/cooling for air condition on R410 refregitant ?

Power cca 5kW
Commpressor cca 1,5kw

Best Regards Glavca

[nike123]

For modifications or experimenting, it is better to use TXV.
Capillary in series production is obtained by rough calculation and fine tuning by experimenting.

http://findarticles.com/p/articles/mi_m5PRC/is_2_112/ai_n24998225/ (http://findarticles.com/p/articles/mi_m5PRC/is_2_112/ai_n24998225/pg_7/)

[glavca]

tnx,

But perhaps anyone know practical how long and diameter iscapilary tube for 5kw aircondition ? I not nead ideality, only approximation from other ON/OFF factory outside unit...

I need to make modification on some LG outside unit, who have EEV and on/off comnpressor ( have digital communaction betwen outside and inside unit) to work with normal inside on/off unit. I need only for cooling unpretending room.


Best Regards Jože

[Brian_UK]

Found a Trane document with some R410a capillary data in it, may be helpful.

http://www.scribd.com/doc/27057900/TRANE-AG-Refrigeration-Piping-System

Dancap, Danfoss, does not have R410a in it.

[nike123]

Found a Trane document with some R410a capillary data in it, may be helpful.

http://www.scribd.com/doc/27057900/TRANE-AG-Refrigeration-Piping-System

Dancap, Danfoss, does not have R410a in it.

I think that is for selecting capillary for subcooler and not for evaporator.

[nike123]

tnx,

But perhaps anyone know practical how long and diameter iscapilary tube for 5kw aircondition ? I not nead ideality, only approximation from other ON/OFF factory outside unit...

I need to make modification on some LG outside unit, who have EEV and on/off comnpressor ( have digital communaction betwen outside and inside unit) to work with normal inside on/off unit. I need only for cooling unpretending room.


Best Regards Jože

I saw in some Mitsubishi Electric service manuals that capillary tube length and bore is noted on refrigerant diagrams. Try to search for their manuals and see what could be found.

I found that for 18000 BTU model MSH18NV capilary is 2X 750mm of 1,6mm bore.

[glavca]

2 x 750mm in paralell bind together ?


Regards Jože

[nike123]

2 x 750mm in paralell bind together ?


Regards Jože
Here it is outdoor unit heat exchanger divided in 2 circuits. Each circuit ends in its own capillary and at other side capillaries are bonded together. That is for balancing outdoor heat exchanger. If your is of 1 circuit only, you could bond both ends of capillaries.