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Absorption Chiller Problem

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#7 ·
The following would apply to any of the 21 possible models that occur from YIA 1A1 through YIA 14F3, I assume you have only one of them. A properly operating machine will have a LiBr level in the bottom inch of the sight glass when operating with fully concentrated solution. That assumes the correct amount of LiBr and water is in the machine, no air in the machine, strong LiBr is near 65% and condensing water is entering 80 - 85 deg. F .
 
Discussion starter · #8 ·
Thnx for prompt response.
You are right we have Libr and Demin water called dilute solution at bottom of Chiller(absorption section)at bottom of chiller. to eliminate this problem we have added Demin water 2 to 3 times but problem remains the same.
Kindly suggest on what conditions we should add LiBr in chiller.During operation Libr concentration reported 55 to 58 %.
 
#9 ·
If your only at 55 to 58% concentrated as soon as you start to load the machine and raise your concentration, the level is going to drop as you drive the water out of it. How far does the level drop? Is the pump cavitating? What makes you think you have a problem? Will the machine make setpoint? Are you getting some kind of alarm?
 
Discussion starter · #10 ·
We have two Chillers of same model one on standby and other in service. When we compare both at same conditions, we noticed that dilute solution level of one chiller in level glass remained full while of second one decreased to 40 to 50 % in level glass. No alarm or pump cavitation either in both chillers.
 
#16 ·
What are you doing to determine the 55 to 58% concentration? Are you using what is displayed on the control panel or are you taking a sample? If you are taking a sample, do you need to use a vacuum pump to obtain it?
 
#18 ·
With the wealth of info we do not have I am making the assumption there probably was nothing wrong with the machine. If it can make setpoint with 58% strong solution it must be doing amazingly well. A full sight glass at that concentration is to be expected. I still question whether the 58% is the strong solution. The panel gives the strong concentration but a vacuum pump must be used to obtain a strong sample. Your answer says sometime we use the pump but not often. Any sample obtained without the pump would be a dilute sample. I suggest you not add any more "demin" water or LiBr. I am also assuming you have little to no hands on absorption experience. York/JCI has some pretty good manuals that explain the operation of the machine and what you should expect to see. Find them and start studying. You must have at least one because your model # answer came straight off the cover.
 
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