Coates Electric Pool Heater, 15kw 240V Single Phase

The Coates 15kW 240V Single-Phase Electric Pool & Spa Heater (Model 12415CE / 12415CPH) is a commercial-grade, inline immersion water heater designed for commercial spas, hotel plunge pools, wellness facilities, and swim school therapy tanks requiring reliable, zero-emission electric heating.

Electrical & Heating Performance

• Model Designation: Coates 12415CE / 12415CPH series.

• Heating Capacity: 15 kW (15,000 Watts).

• Thermal Output: 51,182 BTU/hr ($15\text{ kW} \times 3,412.142\text{ BTU/kWh}$).

• Operating Voltage: 240V AC, Single-Phase (1Ø), 60 Hz.

• Full Load Amperage (FLA): 62.5 Amps ($15,000\text{ W} / 240\text{ V} = 62.5\text{ A}$).

• Overcurrent Protection (Breaker Sizing): Requires an 80-Amp dedicated double-pole circuit breaker conforming to NEC continuous duty standards ($62.5\text{ A} \times 1.25 = 78.13\text{ A}$ minimum branch rating).

• Conductor Sizing: Minimum #3 AWG or #2 AWG THHN/THWN copper wire (rated 75°C/90°C, adjusted for conduit run and terminal ratings).

Construction & Safety Architecture

• Pressure Vessel: Heavy-gauge, welded cylindrical steel/stainless steel vessel coated internally to withstand continuous commercial water velocity and chemical exposure.

• Heating Elements: Screw-plug immersion elements with heavy-duty Incoloy 800/825 sheathing to prevent pitting and scale accumulation from chlorinated or brominated water.

• Cabinet & Enclosure: NEMA 1 heavy-gauge powder-coated industrial steel cabinet with a removable front panel for terminal inspection and routine maintenance.

• Integrated Safety Controls:

  • Dual-dial adjustable thermostat (up to 104°F / 40°C for commercial spa compliance).

  • Manual-reset High-Limit safety switch trip-set at 122°F (50°C).

  • Flow-interlock switch preventing heating element energization in deadhead or low-flow conditions.

Hydraulic & Plumbing Specifications

• Plumbing Connections: Standard 1-1/2" NPT female inlet and outlet ports.

• Flow Rate Parameters:

  • Minimum Flow Rate: 15 to 20 GPM (approx. 57 to 76 LPM) to trip the interlock and prevent dry firing.

  • Maximum Flow Rate: 60 to 70 GPM (approx. 227 to 265 LPM). Higher pump flow systems require an external bypass loop.

• Maximum Working Pressure: 60 PSI (approx. 4.14 bar).

Dimensions, Net Weight & Shipping Weight

• Unit Dimensions: Approximately 19.5" L × 10.0" W × 14.5" H (approx. 49.5 cm × 25.4 cm × 36.8 cm).

• Net Unit Weight: Approximately 48 to 54 lbs (approx. 21.8 to 24.5 kg).

• Packaged Shipping Dimensions: Approximately 22" L × 13" W × 17" H.

• Packaged Shipping Weight: Approximately 59 to 68 lbs (approx. 26.8 to 30.8 kg) in heavy-gauge corrugated carton with molded foam internal packing.

Estimated Temperature Rise Rates

(Calculation: $\text{Rise (°F/hr)} = \frac{51,182\text{ BTU/hr}}{\text{Gallons} \times 8.34\text{ lbs/gal}}$, baseline heat-up rate assuming covered vessel without ambient losses.)