Chiller confusion..

[grey_fox]

Hi Greyfox, sorry if i had confused you. I thought you might have run your chiller before you purchased the pump. If so, did you time the chiller running time without the pump?

Hii- i need 20 to 25 mins for a 1/3HP to cool down 0.8 degree for a 90 Gallon tank even though my chiller is 2 capacity higher than the one recommended for the volume of water.

Comparably, Greyfox and yours is obviously faster in chilling time for 2 degree difference.

But i find it strange that for 2 degrees your chiller will kick in again after 30 minutes. Given the current ambient temperature, my chiller will only kick in on average 1.25- 1.5hr for 0.8 degree difference. Do you place your chiller in cabinet?

Hi Zenscape,

I think we are all confusing ourselves here

I did not test the chiller without the pump. I'd be expecting somewhere from 2-3 or 5 hours for it to chill down to the temperature that I require. My setup (inital) ran together with the pump, so from the timing I clocked, it took about 25 minutes for the tank to drop by 1 degree and the next degree clocked 23 minutes. (From 28 to 26 degrees)

My chiller is out in the open, beside the tank and so far, it kicks in twice a day only and maximum, thrice.

For example, yesterday it kicked it at around 7.10pm and finished chilling from 28 to 26 before 8pm. After which no more kick-ins happened, This morning, the tank's thermometer read 27.8 degrees.

Only thing I need to sort out now is the damn CA calibration

Hope I've managed to clear up that bit of confusion hehe

[zenscape]

Oh i see. I was keen to know whether the introduction of a pump could improve the performance of chiller because previously i bought an eheim 1262 pump to drive flow of water to the chiller but it did not show any improvement of the chiller in terms of chilling timing. I am now only using eheim 2028 to drive the chiller flow.

From what you have stated, you chiller and pump combo are doing very well

[grey_fox]

Thanks zenscape, only thing i need to figure out is the calibration. I think the chiller's thermostat is a goner...

[hii]

my chiller place outside cabinet too, but it is at the corner which is behind my main door. No other place to put cause it will block my walk way if i put at the other side.

Maybe that's why the air ventilation no so good, there is some comments I read before regard the flowrate with chiller.

If you running with a slower filter rate, it took longer time to chill and it will stay longer before kick in again....why!! I don't know how to explain leh..i guess you all know what i mean.

I running 2028 and Atman CF 1200, 2028 drive my Co2 reactor, while Atman drive my chiller.

[grey_fox]

ya. the lower value u set the more different temp between chiller and tank. Me also set to -2.

For CA the calculation is temp in tank - temp of chiller

So since originally the figure was -2 and the tank's temp was 27 degrees and chiller at 28 degrees.

CA = 27 - 28 = -1

or can I conclude my thermostat in the chiller is screwed and I need to get a external thermostat...

[hii]

As i mentioned, the original thermostat no accurate too because the probe is located near thje cooling coil so it will always no the same as you tank. so no matter how you calculate it will never get the same.

Faster the flowrate will get more accurate reading but you chiller will kick in more often cause it detect the correct water temp faster.

External thermostat will be best cause the probe is put in your tank to get water temp directly u don't need digital thermometer anymore ... but again are you willing to pump in the extra $$ just to get accurate temp?

a bit different temp reding is OK as long as your plant grow well, if you keep SPS like those marine hobbist than of course you need better thermostat.

if you keep thinking of it you sure having nightmare soon and will wake up midnight to see the temp reading.

[grey_fox]

ok then I will set it to -2 and use it as a +1 guage. Chiller will be set to chill at 27 degrees when in actual fact, tank will go down to 26 degrees.

[grey_fox]

I've just set the chiller CA to -4...

Tank Temp: 27
Chiller Temp: 27

When I set it to CA -3

Tank Temp: 27
Chiller Temp: 28

When I set it to CA -2

Tank Temp: 27
Chiller Temp: 29

Super radical...

[winq]

sorry. but my resun cl650 abit funny. i set the chiller to kick run at 23 (tank temp 24.5) but it kick start at 25(chiller temp). so i set +1. tank temp 25, chiller temp oso 25 and the chiller start to kick in. am i correct to set +1 ?

btw, i'm using a eheim2026. flowrate is abt 950l/h.

[Shadow]

are you using your filter to drive your chiller? it probably because not enough flow. Typically filter will loss 30% of its flowrate once you put in the media.

By the way usually you set the temp when chiller stop its compressor, not when its start turn on the compressor. So if you set the chiller target temp at 23 then it is normal to start its compressor when temp at 25.

[winq]

are you using your filter to drive your chiller? it probably because not enough flow. Typically filter will loss 30% of its flowrate once you put in the media.

By the way usually you set the temp when chiller stop its compressor, not when its start turn on the compressor. So if you set the chiller target temp at 23 then it is normal to start its compressor when temp at 25.

oh i see.. now i get the picture. thanks alot bro.