Installing a Rheem Retex 13. Only the 2 hots are supposed to be wired in, no neutral. What's the theory behind not using the neutral on a 240v install like this, while
Rheem RETEX-13 Tankless Water Heater - YouTube
Installing a Tankless Electric Water Heater - Rheem RTEX 240v 13kw in My House - YouTube
Rheem RETEX-13 Tankless Water Heater - YouTube
Rheem RTEX-13 13kW Electric Tankless Water Heater 240V Ext Adj Temp 1-2 in. Comp Con | CPO Outlets