This is the new style computer board (larger style) suburban no - 511114 to suit the SW6xx range of suburban hot water systems.
This larger board can be retrofitted in place of the older style circut board for SW6Dxx (232582/232391/520814) which has been discontinued and not available.
Retrofitting this board in place of the older (smaller) Style board you will also need the larger cover to suit 090613 - Replacement SKU - 950-02532
