gwjwbw wrote:The opening on the boiler for DHW coil, I have a 5 gpm coil now and going with a 7gpm, do I need to make the opening bigger?
I snaped off 3 of the 8 bolts that hold the coil, now going to cut them all out and weld a flange onto the boiler and use nut and bolt for the coil
Gerard, the extended coil mount is available from EFM. It requires a new style coil to match, so be sure to order them together. My 520 has been fitted with this mount, if you want a picture let me know. I recommend you have an experienced welder install it.