Home Pool Pool & Spa Heaters Commercial Heaters & Boilers Pentair PowerMax High Performance Outdoor Commercial Swimming Pool Heater | Indoor-Outdoor Pump Mounted | Copper Exchanger | 500M BTU Natural Gas | PM0500NACC2BXN PM0500NACC3BXN
NOTICE: The Texas weather emergency in February, in addition to the ongoing demand increase for pool products from the Covid pandemic, have caused industry-wide shortages on many products that most vendors expect to last late into 2021/early 2022. We're allowing items to be purchased so that customers who choose to wait will have their order shipped when product arrives. Many times there are long shipping delays on the few products we do have in stock. Please contact us to ask about availability. Live Chat and email are the best. Please keep trying back via chat and email as we can't answer them as fast as they come in but we are here, so keep trying! We're currently 20+ days behind on returning email (email is the best way to get a reply when all chat associates are busy). 

Pentair PowerMax High Performance Outdoor Commercial Swimming Pool Heater | Indoor-Outdoor Pump Mounted | Copper Exchanger | 500M BTU Natural Gas | PM0500NACC2BXN PM0500NACC3BXN

Pentair PowerMax High Performance Outdoor Commercial Swimming Pool Heater | Indoor-Outdoor Pump Mounted | Copper Exchanger | 500M BTU Natural Gas | PM0500NACC2BXN PM0500NACC3BXN

Parts AvailableParts Available
Platinum Preferred Manufacturer
  • Reliable operation in natural or propane models
  • Fan-assisted and filtered combustion air
  • Fits through standard doorways
  • Gas Supply right or left side
  • Copper heat exchanger
  • CSD-1 and other options available. Contact factory for part numbers
Purchase Options
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PowerMax® High Performance Electronic Ignition Commercial Swimming Pool Heaters
When performance is critical, the PowerMax swimming pool heater provides peak efficiency and easy maintenance in both indoor and outdoor applications. Seven sizes delivering up to 85% efficiency ratings and meeting all Low NOx requirements. PowerMax is designed for operation to 10,000 foot elevation.
Today's PowerMax is the result of over 50 years of design and manufacturing experience, and is packed with advanced features specific to the commercial swimming pool and water.
Available in seven sizes from 500 to 2000 MBTU/h, PowerMax runs reliably on natural or LP gas and delivers efficiency levels.
A 10-tube heat exchanger uses finned tubing for the quickest and most efficient heat transfer, and the water heater meets the ASHRAE 90.1 standard for efficiency for use with storage tanks. With superior overall construction and high-efficiency combustion, PowerMax can cut fuel costs significantly compared to conventional water heating systems, and the savings can amount to thousands of dollars over the life of the equipment.
Standard Features
  • Reliable operation with natural or propane gas.
  • Fan-assisted and filtered combustion air.
  • Dual ignition systems for all models over 750,000 BTU.
  • 2-stage, 3-stage and 4-stage firing.
  • Immune to thermal shock down to 30° F.
  • Built-in automatic mixing system reduces condensation possibilities.
  • Compact size allows PowerMax to fit through standard doorways.
  • 200/208 and 575 volt models available on request.
  • Gas Supply right or left side
  • CSA Certified CSD-1 and other options available. Contact factory for part numbers
  • Meets low NOx requirements for cleaner combustion.
  • One-year limited warranty. See warranty for details.
Packed with Advanced Features
Every PowerMax comes standard with a built-in automatic mixing system to make sure low return water temperatures won't cause problematic condensation in the heat exchanger. The mixing system includes an automatic three-way valve, fast-acting electronic actuator, factory mounted and wired pump and a simple operating control that monitors all important system functions. That means PowerMax can handle return water temperatures as low as 60 degrees without condensation. And, every PowerMax has a standard "Backwash Switch" that allows you to safely backwash the filter and avoid high-limit shut-downs by allowing the pump time delay to complete its cycle before shutting down the heater. NOx emissions are among the lowest in the industry at 10 ppm, and PowerMax maintains its efficiency and low NOx levels at all stages of firing.
Easy to Install and Service
PowerMax makes service easy and operation reliable because they do all of the set-up for you. Whether you use room air for combustion or take air from outside; vent into a chimney, or through a sidewall; or install the heater indoors or outside, PowerMax is ready "out of the box" The automatic bypass and combustion systems are factory preset, and no field adjustments are required. Whether you are installing at sea level or at a 10,000 ft. elevation, no orifice or component changes are needed.
They've also taken service access to a new level. PowerMax makes installation easier by providing a control system that gives installers several different operation modes, selected with the touch of a button. Modes include settings for primary/secondary piping, DHW storage tank systems, B.A.S. controls and other common applications.
PowerMax features convenient, modular construction that separates the burner trays, gas train and blower assembly, to ensure perfect alignment of orifices and burners. Gas manifolds mount on the burner flange and the burner flanges seal to the air box. In addition, the entire gas train can be easily removed, and the heat exchanger simply lifts out from the top or front of the unit. The air filter is a breeze to clean... just wash it with soap and water.
Controls are also service-friendly with clean and simple wiring, and are readily accessible in a slide-out drawer. All models have a convenient front-access panel with status indicator lights to monitor power, call for heat, pump on, ignition on, gas valve open and lock out.
Installation and Service Convenience Features
  • Reversible vent and intake air terminals (field convertible).
  • Gas supply right or left side (field convertible).
  • Reversible water connections to accommodate left or right side piping.
  • Separate field wiring terminal panel.
  • Front panel diagnostics.
  • Optional rack-mounting.
  • Quick-access panel for igniter replacement.
  • Combustion chamber sight glasses on both right and left sides.

Brand: Pentair
BTU Rating
Gas Type
Natural Gas
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Register your Pentair product online at www.pentair.com.

  • LIMITED WARRANTY: Pentair warrants its products to be free from defects in material and/or workmanship for a period of sixty (60) days (parts only) from the original date of purchase and/or installation. Customer agrees to prepay all shipping charges to Pentair.
  • EXTENDED WARRANTY: To receive a product extended warranty (longer than 60 days from the original date of installation), customer must:
  1. Register the product;
  2. Provide a copy of the sales receipt; and
  3. Provide a copy of the installation invoice, provided by the qualified installer, within 60 days of installation (if required). Certain products do not require qualified installation but still require product registration and copy of the sales receipt to receive the extended warranty.
  • TRADEGRADE WARRANTY: TradeGrade products must be purchased from a retail store (brick and mortar), pool builder or pool service company. If purchased online (via internet) the product will only receive a sixty (60) day limited warranty. View the list of TradeGrade products here.
  • ECOMMERCE (EC) WARRANTY: Products purchased from an Authorized Pentair Online Reseller receive a one (1) year (parts only) warranty from the date of purchase. The exceptions are: IntelliChlor cells and IntelliFlo SVRS pumps which receive a two (2) year warranty. EC products are not eligible for the bundled three (3) year extended warranty. To receive an eCommerce warranty, customer must:
  1. Register the product, and
  2. Provide a copy of the sales receipt
Visit www.pentair.com to submit your product warranty registration.
This information was updated on 04/05/2021. For the most current information and full warranty policy please visit www.pentair.com/warranty.

 Adobe Acrobat PDF Warranty Information
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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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