Originally Posted by DublinDilbert
It "might" be possible if you had a wiring diagrams of the internals of the unit and someone with the right skills. It would need someone who know's what they are doing to see if it can be converted. I've done this before, for industrial automation equipment.
Looking at the wiring diagram the first problem is that the LV trafo is only a 110V, so there's the first problem. The second problem would be that there appears to only be 1 heating element, I would of imagined this would of had 2 heating elements one per phase, which would be configured/paralleled if run off single phase 110V. The PCB would need to be looked at to see where the neutral is being used on it (and what would happen if L1/L2 were exposed to 220V). Someone would also need to evaluate all of the accessories to see if they could run of 220V.
Your basically having to redesign the internals, most if not all electricians wouldn't touch this.
Thanks for this - very interesting - even for that wiring diagram, which leaves all the PCB info out, you managed to see the problem with the internal transformer. From what I can see, it seems to be taking the 120V (1 phase of it) in on 2 separate windings, and outputting R, Bl and Y.
Any guess as to what these voltages might be? It seems then this Bl and the original (i.e. pre trafo) B are used to power the heater. (from the other doc B is black, and bl is blue, which is L1 and L2.
This makes some sense, as when you don't use L2, you are supposed to connect it to neutral - so in the 110v config the heater has 110V accross it, but in 220 config, it has 220 accross it - so it must be designed as a single element that can handle either voltage.
It also seems that some of the plugs (on the right hand side) only have B and w, so are 110V only - the two pump sockets at the top though seem to be 240V, but taken in B R W, so whatever the trafo that generates the R and Y voltages seems to be key here....Any ideas?
I had an idea for trying to make the irish 220 look like the us system -
connect Irish neutral to L2, and irish live to L1. Then to generate the US neutral, I could use a 2:1 trafo, with the input windings on irish L and N, and the output winding shorted back to L, with the other output winding being the us neutral.
The idea is that the trafo will generate a 110V signal from the irish 220V. Connecting one output to the irish L, means the other output will be 110V with respect to the L - i.e. just as the US neutral would be. This only works in a differential sense, it neutral would be oscillating too (I think), unlink the US neutral which would be fixed. I think this should work, but only if the case is no powered unit has a connection between the us N and L2 (as there is no gaurantee that there would be always <110v between these two).
This is pretty difficult to describe - but hope it makes some sense!