whats wrong with my chiller?

[helloween]

hi reffers,,,i been using resun cl 280 chiller for past 7 mth now. but these few days my chiller indicated the temperature at 27 degree. i set it to 24 degree but it stays at 27 degree until now... that make me worried is my chiller got a breakdown? by the way i use the chiiler for my 3 ft tank. plz i need yur advise

[AlfaRomeo]

Hows the pump flowrate? still the same as last time? Any changes that you made recently to the tank and chiller setup?

[helloween]

well im using jebao 915...flow rate about 1100 L/H. well i did not made any slight adjustment at all to my tank nor my chiller.it just stay 27 degree n 28 degree when i on my MH.but there a some noise from the chiller...is it normal?

[AlfaRomeo]

Have you asked a technician to have a look at the chiller yet?

[helloween]

well can i call normal aircon technician or to call people specilize in repairing chiller?

[helloween]

well can i call normal aircon technician or to call people specilize in repairing chiller?

[Domino]

Chiller reads 27C, what does independent thermometer read?

If T above 24C+2C (26C), then chiller should be running all the time is that the case? Usually it should start running when T=26C and stop when you reach 24C.

You could try recalibratin the T sensor (instruction manual)

[helloween]

well. when chiller reads 27degree , my thermometer is aroundsbetween 27 - 28 dgree.my chiller kept on running n never stop at 24 degree which at set it.when i check the manual .shows nothing about howto calibrate the sensor.... frustrated!

[Domino]

Hum, I'm using CL650 so it is different. Your temperature sensor should be okay because same as thermometer.

Maybe you need to clean up your chiller. There is a lining of stuff that forms on the exchanger that greatly reduces its efficiency especially if the chiller capacity is a bit to just for the the tank size. I suspect it is in your case; always better to take larger, especially with cheap china made chillers; don't trust the manufacturer label!!

Usually recomenteded to clean up every 6 months.

Disconect the chiller and run slightly diluted cheap vinegar in reverse for a few hours using a powerhead. reverse means inject through the outlet of the chiller and vinegar will come out through the inlet back to the bucket. Then run some fresh water the same way to clear vinegar traces and hook it back on.

hope it will work!

[firestream]

TO calibrate the chiller temp, just hold the "set" button for 10 sec , then another screen will come out , press + or - to calibrate the temp (e.g. chiller show 28 but tank is 27, then -1 so chiller also show 27) between the chiller & your tank.

[helloween]

thank for advise

[YzF]

The lining that is found on the pipings is called scaling. Form by calcium deposits. It is also found in normal industrial piping. It is espescially serious in Marine setup due to the high Calcium hardness in our water~400ppm. It will cause corrosion known as pitting to the copper pipings. Which also mean that the piping will burst eventually. It will also affect the heat exchanging capability of the chiller and cause the chiller to run all day long thus increasing electrical consumption.

So how to clean it? Acid cleaning is one way. Run 15%HCl along the pipe line for hours. Vinegar commonly available is around 3%. It is very diluted. Will need to neutralise the acid before running it for the system. Acid cleaning is risky as it might just burst any part of the piping.

There are easier ways of cleaning the pipe but it contains phosphate. Maybe running the whole thing to Rowa might solve the problem.

I am trying to flush my chiller also. So will study the appropriate method and will let you guys know if it works.

[kareen]

In my opinion, I think your chiller is unable to cool your 3 feet tank water to 24 degree as you have set. You might need a higher hp chiller to achieve 24 degree. Resun CL280 is only 0.1hp.

[kareen]

BTW, u can go this website : http://www.jbjlighting.com/prod_chiller_size.asp

to find out how to size the chiller for the desired temperature.