Follow manufacturer's instructions for installation and adjustment of the valves. • The User Interface Module (UIM) on this water heater have been.Nyletherm 1 Manual PDFInstallation takes about an hour depending on your skills and current tank installation. Watch a video of the expert install & explain Installation to the existing electric water heater is relatively easy. Price of this model is about $700. * Coefficient of performance (COP) of 3.0 means you