need advice on pump for chiller

[tansh]

Hi,just got a new resun CL450 chiller,would like to find out a 1300l\h powerhead enough to pump the water back from sump to maintank?The distance from sump to chiller is 2-3m with up and down,from chiller to maintank is 2.5m with up.Hope someone can advice me on that and many thks.

[hamannbmw]

U will need a more powerful pump due to the distance ...

look here http://www.sgreefclub.com/forum/index.php?showtopic=15404

[trader_best]

wow...all so far far away ar....need bigger pump....anyway, why so far apart ar?

[tansh]

wow...all so far far away ar....need bigger pump....anyway, why so far apart ar?

Cos Im using cabinate so hv to run the hose from sump to outside cos my chiller place beside the cabinate,than from chiller to maintank about 2m.

[tansh]

U will need a more powerful pump due to the distance ...

look here http://www.sgreefclub.com/forum/index.php?showtopic=15404

Thks for the advice,btw Im getting 2000l\h should be more than enough.

[Jun Hong]

The water will suffer head lost it flow through the coil of the chiller. I am using 2300l/h return pump for chiller but I still feel it is not strong enough. So may be you may consider higher flow rate pump

[tansh]

Just hook up my chiller to the 2000l\h atman pump yesterday night,the flow output from the chiller just nice.

Is it ture that first time run the chiller it will take longer time to cool the whole tank to the temp i set?Btw i set the temp to 27deg but actual temp is 28deg,can anyone advice me on that,thks.

[Domino]

About the temperature, I had this observation too.

When you set 27, the chiller will run until it hits the 27deg mark but in reality 27.9deg (it doesn't chill to 27.0deg)... Almost an instant later the temperature on the display will jump to 28deg and will rise until the 2 deg difference is met meaning 29.0deg (29-27=2deg) then the chiller will kick in again and bring it down to 27 (27.9 in reality).

In other word, your temperature will be maintained in the 28deg range when you set it at 27 and at 27deg range it you set it at 26... weird huh?

[alanseah]

About the temperature, I had this observation too.

When you set 27, the chiller will run until it hits the 27deg mark but in reality 27.9deg (it doesn't chill to 27.0deg)... Almost an instant later the temperature on the display will jump to 28deg and will rise until the 2 deg difference is met meaning 29.0deg (29-27=2deg) then the chiller will kick in again and bring it down to 27 (27.9 in reality).

In other word, your temperature will be maintained in the 28deg range when you set it at 27 and at 27deg range it you set it at 26... weird huh?

Well it's all depend on the type of digital temperature controller your chiller is using..

for some chiller which is using 3 digital display e.g. 2.75 degree then u can really set the correct temp u want.

For my case I set my temp to be min 27.5 and max 28.5 so chiller will kick start on 28.7 and stop at 27.3.

Also I find using a low watt pump that can give 2000l/h e.g. sicca which is only 35watt and able to give me 2300l/h.. at least it's not those china make pump which it's flow rate is half of what they clam.

[roy]

who had sec hand chiller to sell...

[tansh]

About the temperature, I had this observation too.

When you set 27, the chiller will run until it hits the 27deg mark but in reality 27.9deg (it doesn't chill to 27.0deg)... Almost an instant later the temperature on the display will jump to 28deg and will rise until the 2 deg difference is met meaning 29.0deg (29-27=2deg) then the chiller will kick in again and bring it down to 27 (27.9 in reality).

In other word, your temperature will be maintained in the 28deg range when you set it at 27 and at 27deg range it you set it at 26... weird huh?

U r right,the chiller will start to kick when the temp reach 29deg when i set to 27deg but actual temp is 28deg,I think thats how resun chiller work.Btw my chiller start to kick for 3-5min every 15-20min base on the above temp set,will this comsume lots electricity and chiller will get stress?