Dual-Head Iwaki

[JamesAvery22]

Ebay Auction link

Just saw that, Dont think Ive even seen this thing advertised in any iwaki documentation.

Its 220v so Im guessing the majority of people here cant use it (Is it the Brits or Aussies that have 220? or neither? :shrug: ).

What would happen if you put the two heads in series with each other? Dont see any problems with that. Too bad that thing sucks 45watts.

Just thought it looked awesome so I posted it

Sorry if its been talked about before.

[RaptorRaider]

Looking at those specs I highly doubt performance will be interesting:
Should be around 1200 LPH, max head of 2.3M and about 20W heat dump per loop, right?

[jaydee]

Found a little near usless .pdf. http://www.iwaki.dk/start/products/p..._id=1&choise=5

[EnJoY]

It's just two MD-15 R's...nothing too special, although rather neat as I too had never seen this before. Performance if ran in series...or maybe parallel should be pretty good, you'd just have to wonder about the heat dump. What do two MD 15-R's do to performance? Would it be like an MD30?

[Nugit]

Originally Posted by JamesAvery22

Its 220v so Im guessing the majority of people here cant use it (Is it the Brits or Aussies that have 220? or neither? :shrug: ).

Aussies have 240V

We (europeans) are supposed to have around 220V, though I think its actually 230V. Not much of a difference though.

[dogbait]

Originally Posted by Nugit

Aussies have 240V

We (europeans) are supposed to have around 220V, though I think its actually 230V. Not much of a difference though.

Neither UK or AU have 220v, it's 240v in AU and 230V in the UK. China has 220V apparently, (at least according to this table:
http://www.listenhear.co.uk/voltages.htm

However bear in mind power companies are generally allowed +/-6-10%, so 216.2V to 253V is legally permissable. All thanks to European harmonisation in the way electricity is regulated, basically so that all the member countries have compatible electric supplies.

Using 220V on a 240V grid is not good. It puts strain on the equipment's voltage regulators/AC circuits. A 10% increase in voltage above an appliance's recommended voltage will result in 21% more power consumption. So more heat dumped in the loop and since we're looking at a device that normally works at 220V, 60HZ (US power) you lose a fair bit of performance using it in the UK.

However a curious thing to note is that looking at the two Iwaki's I have. One bought in the UK and one bought in the US (220V model), both say:

Voltage: 240V/220V
Frequency 50/60Hz

Leading me to believe that Iwaki's will adapt within that range. The interesting part is that the model numbers on the two are MD-15R-230GS for the UK (230V) bought Iwaki, and MD-20R-220 for the other purchased in the US.

[jaydee]

Originally Posted by dogbait

220V, 60HZ (US power)

USA is 110V 60HZ.

[dogbait]

Originally Posted by jaydee116

USA is 110V 60HZ.

Yes that is true, but the US also uses 220V circuits for dryers, A/C and other equipment which cannot practically run off a 110V circuit.

[jaydee]

Originally Posted by dogbait

Yes that is true, but the US also uses 220V circuits for dryers, A/C and other equipment which quite simply cannot practically run off a 110V circuit.

Yeah, but they are not everywhere in the house and have a huge plug on them ususally (not the standard little one). Usually only installed in the laundry room and one in the kitchen for the stove (older houses anyway, newer is primarily 110V). All others you have to have specially installed by a electrician. In other words you not going to be easlily able to use a 220V+ item without either spending $500+ for a 220V outlet to be installed or buy a 220V to 110V converter such as this http://www.starkelectronic.com/st500.htm.

Most of the appliances you mentioned actually now run on 110/115V here in the states. My A/C, washer/dryer, oven/stove, and dishwasher all run off 110V.

[pauldenton]

Originally Posted by dogbait

Neither UK or AU have 220v, it's 240v in AU and 230V in the UK. China has 220V apparently, (at least according to this table:
http://www.listenhear.co.uk/voltages.htm

However bear in mind power companies are generally allowed +/-6-10%, so 216.2V to 253V is legally permissable. All thanks to European harmonisation in the way electricity is regulated, basically so that all the member countries have compatible electric supplies.

Using 220V on a 240V grid is not good. It puts strain on the equipment's voltage regulators/AC circuits. A 10% increase in voltage above an appliance's recommended voltage will result in 21% more power consumption. So more heat dumped in the loop and since we're looking at a device that normally works at 220V, 60HZ (US power) you lose a fair bit of performance using it in the UK.

However a curious thing to note is that looking at the two Iwaki's I have. One bought in the UK and one bought in the US (220V model), both say:

Voltage: 240V/220V
Frequency 50/60Hz

Leading me to believe that Iwaki's will adapt within that range. The interesting part is that the model numbers on the two are MD-15R-230GS for the UK (230V) bought Iwaki, and MD-20R-220 for the other purchased in the US.

iirc it used to be 240v in the UK, but the entire EU standardised on 230V (thus covering the whole range of previous standards of 220v, 230v and 240v in the various member states) pre 1947 (when the UK's electricity industry was nationalised) a few areas operated on completely different voltages/plug standards etc....

the cynic/realist in me can't help suspecting that the "230" in the model number is a way of extorting more money from us for the same product

[dogbait]

Originally Posted by pauldenton

<snip>

the cynic/realist in me can't help suspecting that the "230" in the model number is a way of extorting more money from us for the same product

I'd agree on that since cracking open the two pump's shows a capacitor or line conditioner of some sorts with the exact same spec.



I'm curious though jaydee116, why there are people running a 220V Iwaki in the US, when they can run a 110V instead?

[jaydee]

Originally Posted by dogbait

I'm curious though jaydee116, why there are people running a 220V Iwaki in the US, when they can run a 110V instead?

Because they got it cheap off e-bay with 220V specs is my best guess. I am a construction worker and lived in the USA for all of my 28 years and know the building codes pretty well.

[JamesAvery22]

Originally Posted by EnJoY

It's just two MD-15 R's...nothing too special, although rather neat as I too had never seen this before. Performance if ran in series...or maybe parallel should be pretty good, you'd just have to wonder about the heat dump. What do two MD 15-R's do to performance? Would it be like an MD30?

What are the input and output ratings on the pump? It consumes 45w and dumps 20w into the loop?

Even if putting them in series meant double head performance (assuming it usually equates to a little less than double) it would still be under a md-20rz with pretty close to the same power consumption/output ratings. MD20RZ has 6.9m head and that would be 4.6m at 60hz?