With regard to PHASE, are Hatco electric Booster Water Heaters field convertible from single- to 3-phase, and vice versa?
Only 6kW, 7kW or 9kW Booster Water Heaters, 208 volt or 240 volt, are field convertible from single- to 3-phase, or vice versa. All other Booster Water Heaters must be ordered specifically for single-phase or 3-phase, and CANNOT be converted in the field.