Abyzz Heat Transfer Internal Application

[VegasMike]

Does anyone have any experience with heat transfer using an Abyzz pump submerged in a sump?

I am thinking about swapping my Dolphin 4750 for an Abyzz and would like to avoid drilling my sump again since I currently have a 1.5" bulkhead and the Abyzz looks like it requires a 2" bulkhead.

[mcgyvr]

Are you asking about bulkhead size or heat transfer?

Essentially all its wattage is being given off as heat.. If its rated at 100W and running 100% then its basically the same as having a 100W heater..

[VegasMike]

Heat transfer using it submerged is my question. My sump has a 1.5" bulkhead already installed for my Dolphin external pump, but the Abyzz pump has a 2" inlet.

I might just use the 1.5" bulkhead and use an adapter to get to the 2" inlet size since I won't be using the full capability of the pump anyway.

[jda]

Do you not need the heat?

I submerge all of my pumps since the heat is a blessing in all but week or two of the year. The rest of the time, it save me money and electricity.

[scubadan206]

Doesn't the Abyzz have an external heat sink?
I have heard the pump itself stays at about 90- 100 degrees, while the other parts like the computer run only a little hotter.
Not like the 150+ degrees that some other pumps sit at.

[slief]

Are you asking about bulkhead size or heat transfer?

Essentially all its wattage is being given off as heat.. If its rated at 100W and running 100% then its basically the same as having a 100W heater..

Normally I would agree with you but in the case of the German pumps, that is not entirely true. While I am not 100% sure about the Abyzz, I know the RD3 pumps bleed most of the heat off via the controllers enclosure which a big heavy aluminum enclosure that serves as a heat sink. The motor blocks also run at a much higher voltage than tradional DC pumps and the motor itself draws much less current compared to tradional DC pumps which transfer most of their heat via the motorblock. As I recall, the Abyzz controller also serves as a heat sink and the Abyzz pumps also run at high volatage as opposed to 24 volts like most DC pumps or even 36v like the Vectra.

Speaking from first hand experience on the RD3's, I have a pair of RD3 230's and these pumps run cold. Mine are external and they are never more than ambient temp. In comparison, the Superdart Golds that they replaced ran hot. My tank temp dropped a couple degrees after making the switch and that was on a system that was 600 gallons a the time. I've run RD3 80's in buckets at full power and they barely heat up a 5 gallon bracket where as an 80 watt heater would turn a bucket into hot water.

That said, the Abyzz pumps are great pumps. They can't be beat for high head pressure needs. They flow they can put out at 25' is insane so if this is a basement sump setup, you really can't go wrong with the Abyzz. They are powerful and very quiet and I doub't you would ever need to run them anywhere near full power. At least if you are taking about the A400.

[VegasMike]

I am probably looking at the A200 to replace the Dolphin 4750 I am currently running. My Dolphin is dialed back a bit anyway and I only have about 8' of total head pressure, 6" vertical plus a couple 90 degree bends.