YORK ducted split

[ALONEI]

:confused: HI

I want to ask you guys if anyone have exp' with the york brand.
This unit have an orfice in the liquid line and from what i understand this orfice is for the heat cycle.

My Q is:
Did anyone expiriance any problems with HP during heating?
I'm talking about 350 psi on 70 LP (R-22)
During cooling cycle the pressurs are fine 50-200psi
the problem is only when heating.

now:
Last time I had this problem with another york unit i changed the RV and the preformance were better.
this time i also changed thr RV but still I'm getting around 320 psi
I cacked airflow,filters,ducts,charge
I'm thinking that maybe york had problems with those ducted splits?
I know that on heating usualy you get higher pressurs but this looks abnormal:confused:

If anyone can help that will be mutch apreciate.
Thank you

[Jase]

Please give details of exact location of the orifice which is installed in the liquid line i.e within the condensing unit or outwith?

regards
Jase

[ALONEI]

Hi
The orfice is located at the exit of the outdoor unit on the liquid line
I know from past exp' that other compenies used this kind of orfice for the heating cycle but i didnt recall pressurs problems
After replacing the RV i cant think of other problems because if there were any other problems i think i could see it in cooling stage as well???????
Thank you for your reply
cheera

[Jase]

By what you are explaining, it sounds like one of those 'bullet-type' restrictor expansion devices that is installed within liquid line. If so, then this is only used for cooling purposes. Is the evaporator capillary fed and is there any sort of expansion device within the condensing unit?

Regards
Jase

[ALONEI]

Hi again

This is not a bullet type restrictor but like a nuzlle orfice and I am quite sure that it's for the heating cycle.
when I changed the r.v I opened the orfice and it wasn't block.
The capilary is in the indoor unit.
I am trying to think why they put this restrictor??????????????????????
anyway it looks like those units work on hige pressurs in heating(no problem in cooling).
I remember some kind of capilary in the condense unit but i'm not sure

thanks
regards
Al

[RickSter]

This restrictor is a slide type accurator which allows expansion when in heating mode and allows full bypass when in cooling. There is usually a matching one at the indoor unit inside the brass connection of the liquid line.The orifice has a number on it which should match the capacity of the unit. Check with York to make sure that the correct orifice is fitted. If the liquid line is lagged , you can get rid of both the indoor orifice and the outdoor one and replace with a correctly sized capillary.

[lldelfin67]

Hi,
York uses orifice instead of TXV. The orifice in the outdoor unit is first version of it and it is modify and put inside any fan coil unit. The problem with the orifice it has small inlet that usually clog up. Sometime it malfunction that is the reason it is converted to small txv. The cause smetime is the pressure it has limitation.

[Azmath Syed]

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