Electric Pool Heaters
An electric pool heater produces heat by forcing water to flow around a submerged electric coil. Most of the components are
similar to a gas or oil pool heater. The controls of an electric pool heater are usually built into the unit. Some models have a separately mounted thermostat to control water temperature.
Electric pool heaters are used where space is too restricted for a gas or oil heater, or where it is not possible to provide sufficient ventilation. They are used more frequently to heat small spas or hot tubs than pools.
The input of an electric-fired indirect pool heater is measured in kilowatts; its output is measured in Btu. The pool heater shown in Figure 5-12 is available in 11 different models ranging in input capacity from 15 kW to 300 kW with a corresponding output of 50,000 Btu per hour to 1,000,000 Btu per hour. These pool heaters are also available with 240 volts (single-phase) or 240/480 volts (three-phase). A wiring diagram for an electric-fired indirect pool heater is shown in Figure 5-13.
