York YAEP chillers

[ARY75]

Can any one let me know if you are facing any problem with the leaving chilled water temperature from YORK chiller YAEP 6666. The chiller is not giving a constant outlet temperatur, it is ranging between 43 to 50 F.

[Dennis1977]

Hi Ary,

Can you give the pick load operating readings of the chiller? It difficult to figure out without basis.


Regards,

[ARY75]

Thanks Dennis for passing.
Actually I`ve gone through York O&M manual, and it is clearly talking about the mixed water temperature from the two evaporators of one chiller, and there is a control range temperature. So I think the chiller is indeed designed like that. Can anyone confirm that, and what is effect on the whole system when the supply temperature is varying from 43F to 50F.

[muju]

Hi, initially ur mix water temp say 42, unit temp set pt be 43f - 45f with less diff will maintain the hedder temp, also check rate sensitivity, be kept min of 3.5- 3.7. If load constant like recidense bldg, rate sensitivity be kept 4 so loading of compressors will take more time duration.

[ARY75]

Thanks Muju
now the fluctuation is less, but number of starts is high.
The question here is that correct, i.e. to control the mixed water rather than leaving temperature.

[ARY75]

I am almost sure now that there is a problem with this chiller. if anyone have the same chiller, he may check that.