Coates Electric Pool Heater, 30kw 208V Three Phase

The Coates 30kW 208V Three-Phase Electric Pool & Spa Heater (Model 32030CE / 32030CPH) is a commercial-grade inline immersion water heater designed for high-capacity hydrotherapy tanks, municipal aquatic centers, resort swim spas, and athletic training facilities operating on a standard 208V 3-phase/4-wire commercial distribution network.

Distributing 30kW across three balanced phase legs allows this unit to deliver high thermal recovery rates at an operating current of approximately 83.3 Amps per line, keeping breaker and wire sizes well within standard commercial panelboard capacities.

Electrical & Heating Performance

• Model Designation: Coates 32030CE / 32030CPH series (320 designates 3-Phase, 208V).

• Heating Capacity: 30 kW (30,000 Watts).

• Thermal Output: 102,364 BTU/hr ($30\text{ kW} \times 3,412.142\text{ BTU/kWh}$).

• Operating Voltage: 208V AC, Three-Phase (3Ø), 3-pole / 3-wire plus ground (or 4-wire Wye), 60 Hz.

• Full Load Amperage (FLA): 83.3 Amps

  $$\text{FLA} = \frac{30,000\text{ W}}{208\text{ V} \times \sqrt{3}} = \frac{30,000}{360.26} \approx 83.27\text{ A}$$

• Overcurrent Protection (Breaker Sizing): Requires a dedicated 3-pole 110-Amp or 125-Amp circuit breaker conforming to NEC 125% continuous-duty loading standards ($83.27\text{ A} \times 1.25 = 104.09\text{ A}$ minimum branch rating, standardizing on a 110A or 125A 3-pole breaker).

• Conductor Sizing: Minimum #2 AWG or #1 AWG THHN/THWN copper conductor (rated 75°C/90°C terminals, adjusted for ambient temperature, raceway fill, and conduit distance).

Construction & Safety Architecture

• Pressure Vessel: Heavy-gauge, welded cylindrical steel/stainless steel pressure vessel treated internally with a baked corrosion-resistant protective coating to endure continuous commercial water flow and aggressive sanitizing chemicals.

• Heating Elements: Screw-plug commercial immersion elements sheathed in premium Incoloy 800/825 or Titanium alloy, engineered to prevent chemical pitting, scale accumulation, and high thermal stress.

• Cabinet & Enclosure: NEMA 1 industrial painted heavy-gauge steel cabinet with a removable front access panel for terminal inspections, staged 3-pole magnetic contactor servicing, and line terminations.

• Integrated Safety Controls:

  • Dual-dial adjustable thermostatic controller calibrated up to 104°F (40°C) for commercial spa compliance.

  • Manual-reset High-Limit safety cutout set to de-energize the magnetic contactor control circuit at 122°F (50°C).

  • Pressure/flow-interlock switch preventing heating element contactors from pulling in during low-flow, pump loss, or deadhead conditions.

Hydraulic & Plumbing Specifications

• Plumbing Connections: Standard 1-1/2" NPT female inlet and outlet ports (typically adapted via Schedule 80 unions into 2" or 2-1/2" CPVC headers).

• Flow Rate Parameters:

  • Minimum Flow Rate: 20 GPM (approx. 76 LPM) required to trip the safety flow switch and prevent localized thermal cavitation.

  • Maximum Flow Rate: 60 to 70 GPM (approx. 227 to 265 LPM); filtration loops operating at higher GPM mandate an external plumbed bypass manifold.

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

Dimensions, Net Weight & Shipping Weight

• Unit Dimensions: Approximately 24.0" L × 12.0" W × 16.5" H (approx. 61.0 cm × 30.5 cm × 41.9 cm).

• Net Unit Weight: Approximately 68 to 76 lbs (approx. 30.8 to 34.5 kg).

• Packaged Shipping Dimensions: Approximately 26" L × 15" W × 19" H.

• Packaged Shipping Weight: Approximately 82 to 92 lbs (approx. 37.2 to 41.7 kg) in heavy-duty reinforced corrugated carton packaging with dense molded foam protection.

Estimated Temperature Rise Rates

(Calculation: $\text{Rise (°F/hr)} = \frac{102,364\text{ BTU/hr}}{\text{Gallons} \times 8.34\text{ lbs/gal}}$, baseline heat-up rate assuming covered vessel without ambient radiation losses.)