Navien Smart Plus

The setup process for this assumes that everything will go smoothly and look exactly as it does in the pictures. If it doesn’t, there is no way to skip the setup process or sidestep to get help. I have a Navien tankless water heater that is supposed to be compatible with this app, but there’s no apparent “Wi-Fi button” on it. Given that, the process for pairing it with the app must differ from the directions provided, but there’s no other guidance of any kind available. Please either tell me how to make this work or admit that I was misled about the water heater’s capabilities. If I’m going to have to tromp outside in the dark to manually reset “E003” every time I take a shower for the next 10 years, I’d rather not have the wound salted by false hope for a simpler solution. Thanks!