Instant water heater 3 phase?

summereire

I'd love one of these instant water heaters but from what I can understand it needs 400v which must be 3 phase? We only have single phase power. Is there something similar on the market but that would run on 230v that could send hot water to a shower and tap? Thanks

http://www.technotherm.com/Instantaneous-Water-Heater-LCDSelect.html

http://www.technotherm.com/Instantaneous-Water-Heater-LCDSelect.html?file=files/tti/downloads/Gebrauchsanweisungen/Datasheet_LCDSelect_GB.pdf

DGOBS

http://www.rinnaiuk.com/products/domestic

Gas Water Heater

summereire

Thanks- we only have an electric cable installed in the place where we need to put it and putting gas in would be very hard. We've got a 16 square cable so lots of power but only single phase. Anything similar to the link I posted but in single phase?

DGOBS wrote: »

http://www.rinnaiuk.com/products/domestic

Gas Water Heater

Dardania

What about something like this:

http://www.watersave.ie/product/insta-80-instant-electric-water-heater/

It may not have sufficient heat to supply a shower (typically they pull ~9kW) but a tap easy...

summereire

Thanks, yeah something like that would be grand for a tap but we need something strong enough for the shower and that would easily power the tap.

Dardania

Just thinking about it, if you did get a three phase heater, what precludes you from connecting each of the three phases to your single phase supply? It's a resistive load right?

I recall fitting electric hobs before that were dual phase, and a link bar was installed in the factory across the phase connections...

summereire

@Dardania thanks for that suggestion- what are the implications of that in terms of how it would function, i.e. presumably its rated as 3 phase for a reason in terms of power consumption etc?

Dardania

summereire wrote: »

@Dardania thanks for that suggestion- what are the implications of that in terms of how it would function, i.e. presumably its rated as 3 phase for a reason in terms of power consumption etc?

Would be as you say the current requirements would be high

No need - this is a meaty single phase one:
http://www.strom-electrical.com/product/touch-water-heater/

I have the instant hot water tap from this manufacturer - works fine. Good build quality.

gctest50

Dardania wrote: »

Just thinking about it, if you did get a three phase heater, what precludes you from connecting each of the three phases to your single phase supply? It's a resistive load right?...

The heating elements may be strung between the phases ( 400v )

If you connect them across a phase to neutral, the three of them wil only experience 240v and your shower will be dismal

Or maybe the elements are strung from each phase to neutral - lots of current draw if you put the three of them across 1 phase