To the Teco680 user

[chrislwp]

I am currently using a Teco680 for my 4ft. As I am using an old pump for the chiller, the flowrate now is very slow, estimated about 300L/h or less. So my chiller work quite hard especially when Mh on.

Just to check what flowrate pump are you using as I am thinking of changing the pump. Any brand to recommend as well?

Thanks.

[roidan]

in that case your water heats up faster than the small amount of extremely cold water from the chiller....thats why work so hard...

use too strong a pump...and the water flows pass the chiller without getting chilled enough.....

so either way abit problem.....i think they recommend about 380 to 400gallon/hr flow through this chiller...meaning about 1400l/hr...

i am using a sicce extrema to move water through it....although it is rated at 2500l/hr...but after overcoming height head loss and hose pressure loss, should be around the chiller's recommended flow rate..

[chrislwp]

Thanks Roidan.

So I should be looking into pump with adjustable flowrate around the 1500 to 2000l/hr.

[Tanzy]

I use an Eheim 1060 without problems.

[untouchables]

heard fr someone that this model actually moderates the flow to 800l/h so a stronger pump will not make a difference. unable to find any info on recommended flow rate for teco. any bros know where it can be found?

[chrislwp]

heard fr someone that this model actually moderates the flow to 800l/h so a stronger pump will not make a difference. unable to find any info on recommended flow rate for teco. any bros know where it can be found?

In this case maybe I will try using a 1500L/hr pump (since i have 1 extra) and observe whether the flowrate is being moderated.

[roidan]

the 1500l/hr pump will surely make a difference in cooling time....go try it..and let us know

[weileong]

I actually tested the flow rate with a 800L/H pump and 1700 L/H pump.

Both gives flow of about 600 L/H.

Note same tubing used so head lost are about the same.

Best is for you to test it out and see for yourself.

[untouchables]

slightly

what is the recommended way to connect up a chiller? i have seen various methods like:

1. tank through pump to chiller and back to tank

2. pump in sump last section to chiller and back to sump last section, where another pump will deliver water back to tank.

3. pump in sump last section to chiller and back to tank.

4. pump from sump second section to chiller to last section of sump

i am thinking of option 3 but if teco really moderate the flow rate, then my desired flow rate for my tank (looking at 2000l/h) will not be achieved unless i do another return to make up for the reduce flow rate. option 1 will need another set of piping

anyone using option 2 or 4? will the water warm up before returning to tank, ie cooler water is just circulating in sump and only partial return to tank.

thanks!

[chrislwp]

I am using option 2. Tonight will try with the 1500L/hr pump.

[pospeh]

As Weilong said, there is a flow restrictor with the Teco chillers that limit the flow thru to 600l/h. So there is really no reason to use a pump that pumps over 6-800l/h.

[[P]owder Blue]

Bro, from what I know, the recommended flow rate is 400l/hr up from the smallest model up to Teco680. Here is one of the links :

Teco Chiller

Hope this will help

[chrislwp]

From the teco web, the recommended is 360 - 480 gph. About 1400 - 1800 l/h.

[[P]owder Blue]

wait wait ... now this is getting interesting!

apparently the previous webbie is quoting differently!

or could I have quoted a "faulty" webbie?

here is the link from the original teco website :

Link 1

[Daddy]

I know there is a different between UK's gal and US's gal.

The first link should be from US, whereas the 2nd is from UK.

For US 1 gal = 3.785 liter

Can anyone confirm for UK 1 gal = ?? liter

[weileong]

why don't those that have doubt go do a test with pump of different flow rate then you see if the output is restricted at about 600 l/h??? Then you will be convinced and you don't need to wonder if you should use a bigger pump or smaller pump.

[chrislwp]

For UK 1 gal = 4.2+ liter.