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Raypak P-R266A-EN-C #51 Digital Natural Gas Heater, 266K BTU, Electronic Ignition, Polymer Headers, Copper Exchanger, 220 lbs | 009221

Raypak SKU: 9221
RAY009221

Raypak P-R266A-EN-C #51 Digital Natural Gas Heater, 266K BTU, Electronic Ignition, Polymer Headers, Copper Exchanger, 220 lbs | 009221

Raypak SKU: 9221
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Raypak 009221 P-R266A-EN-C #51 Digital Natural Gas Heater 266K BTU

The Raypak 009221 P-R266A-EN-C #51 Digital Natural Gas Pool and Spa Heater is a 266A-series residential heater designed for natural gas applications at 2,000 to 6,000 ft elevation. This model features digital electronic ignition, polymer headers, and a copper heat exchanger for dependable pool and spa heating when installed, sized, and maintained correctly.

This heater is commonly used on residential in-ground pools and spas where a 266A natural gas heater with digital controls, standard copper tubing, and high-altitude #51 configuration is required. Always confirm gas type, altitude, local code requirements, pool size, plumbing, venting, and heater sizing before ordering.

Product Features

  • Genuine Raypak Digital pool and spa heater
  • Manufacturer part number: 009221
  • Model: P-R266A-EN-C #51
  • 266A digital natural gas heater
  • 266K BTU class heater
  • #51 high-altitude configuration for 2,000 to 6,000 ft elevation where specified
  • Electronic ignition for reliable startup
  • Digital control with LCD temperature display and diagnostic information
  • Polymer headers for corrosion-resistant water connections
  • Copper fin-tube heat exchanger for standard pool and spa applications
  • Designed for 120/240VAC single-phase electrical service where specified

Product Details

Brand Raypak
Part Number 009221
Model P-R266A-EN-C #51
Product Type Digital Gas Pool and Spa Heater
Fuel Type Natural Gas
Heater Size 266A / 266K BTU class
Elevation Range 2,000 to 6,000 ft where specified
Ignition Type Electronic Ignition
Header Type Polymer Headers
Heat Exchanger Copper Tubing
Control Type Digital Control
Voltage 120/240VAC where specified
Application Residential pool and spa heating

Compatibility

  • Residential pool and spa systems requiring a Raypak P-R266A-EN-C #51 natural gas heater
  • Installations located at 2,000 to 6,000 ft elevation where this model is specified
  • Outdoor pool equipment installations where this model is approved by local code
  • Systems requiring a 266A Digital Raypak heater with polymer headers and copper tubing
  • Applications where the gas supply, electrical supply, water flow, plumbing, venting, and clearances meet Raypak installation requirements

Common Uses

  • Heating residential swimming pools
  • Heating attached spas when properly plumbed and controlled
  • Replacing a compatible Raypak 266A natural gas high-altitude heater
  • New equipment pad installations where a 266A natural gas heater is properly sized
  • Digital heater upgrades from compatible older Raypak natural gas pool heaters

Important Notes

  • This item is the heater only.
  • Gas line, electrical wiring, bonding, venting, unions, plumbing fittings, automation wiring, check valves, bypass plumbing, pressure relief valve where required, and installation materials are sold separately unless otherwise stated.
  • Verify natural gas availability, gas line sizing, and elevation range before ordering.
  • This model is not a propane heater. Do not attempt to use propane unless the exact propane model is ordered.
  • This is the #51 elevation configuration and is not the same as #50 0-2,000 ft or #52 6,000-9,000 ft models.
  • This is a copper heat exchanger model and is not the same as cupro-nickel, ASME, Low NOx, commercial, or propane versions.
  • Some jurisdictions require Low NOx heaters or have restrictions on standard atmospheric gas heaters. Confirm local requirements before purchase or installation.
  • Improper water chemistry, low flow, scale, corrosive water, freeze damage, or improper bypass settings can damage the heater and heat exchanger.
  • Gas heater installation and service should be performed by a qualified pool heater professional according to Raypak instructions and local code.

Installation Notes

  • Confirm the model, fuel type, altitude range, BTU size, and local code requirements before installation.
  • Install the heater on a level, non-combustible equipment pad with proper service access and clearances.
  • Size the gas line according to the heater demand, gas type, run length, and local code.
  • Confirm proper water flow through the heater before firing.
  • Use proper plumbing practices and install any required check valves to protect the heater from chemical backflow.
  • Bond and wire the heater according to the installation manual and applicable electrical code.
  • Verify inlet/outlet plumbing orientation before startup.
  • Check for gas leaks, water leaks, proper ignition, and correct temperature operation during startup.
  • Register the heater and keep installation records, serial number, and startup documentation for warranty and service reference.

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Maintenance Tips

  • Maintain proper pool water chemistry to help protect the copper heat exchanger.
  • Keep pH, alkalinity, calcium hardness, and sanitizer within recommended ranges.
  • Clean the pool filter regularly to maintain proper heater flow.
  • Inspect the heater area for leaves, debris, rodents, insects, and restricted airflow.
  • Check the equipment pad for water leaks, gas odor, rust, or signs of overheating.
  • Winterize the heater properly in freeze-prone conditions.
  • Have ignition, gas pressure, flame quality, venting, safety controls, and heat exchanger condition checked by a qualified heater technician during routine service.
Questions about returns? View our return policy.

Hours Of Operation:

Monday - Friday: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

  • We do not ship on Saturday or Sunday.
  • Orders totaling more than $300 will require signature confirmation upon delivery.
  • We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
  • Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
  • Expedited shipping options are available at checkout.

Return Policy:

  • Products that are received damaged will receive a refund in store credit.
  • Most products are eligible for return within 30 days of receipt, except where noted below.
  • To initiate a return, please complete an RMA form prior to sending your item back.
  • Original shipping costs are non-refundable and will be deducted from the return credit.
  • Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
  • Some returns will be charged an automatic 15% restocking fee.
  • We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
  • Please complete the return form to receive your RMA number and return shipping label.
  • Chemical products are not eligible for return under any circumstances.
  • The Pentair Colorsync 618031 is not eligible for return.
  • Pool cleaners are not eligible for return.
  • Opened seals and o-rings are not eligible for return.
  • Capacitors are not eligible for return.
  • Plastic popup tools are not eligible for return.
  • Automation components and circuit boards are not eligible for return.
  • If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
  • Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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