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Product Overview

The Raypak R406A Digital Pool & Spa Heater | 009223 is a powerful 399,000 BTU natural gas pool and spa heater designed for dependable heating performance in residential applications.

Built around Raypak’s proven Digital heater platform, the R406A combines straightforward operation, durable construction, and digital temperature control for pools and spas that require fast, reliable heating.

With an input rating of 399 MBTUH, 120/240V electrical compatibility, and a maximum water flow rating of 100 GPM, the R406A is designed for larger residential pools, spas, and applications where substantial heating capacity is needed. Raypak lists the Digital 406A series at 82% thermal efficiency.

The digital control system provides convenient temperature adjustment while continuously monitoring heater operation. This makes the R406A a strong replacement or new-install option for customers who want a traditional natural-gas pool heater with proven controls and serviceability.

Key Features

• 399,000 BTU natural gas heating capacity

• Raypak Digital R406A platform

• Designed for pool and spa heating

• Digital temperature controls

• 120/240VAC compatible

• Single-phase electrical supply

• Approximately 82% thermal efficiency

• Maximum water flow rating up to 100 GPM

• Category I gas heater design

• Suitable for indoor or outdoor configurations when properly installed

• High-capacity option for larger residential pools and spas

• Raypak part number 009223

Raypak currently specifies the 406A Digital platform at 399 MBTUH input, 82% thermal efficiency, 120/240VAC single phase, and a maximum 100 GPM water-flow rating.

Specifications

Raypak documentation identifies the R406A as the 399,000 BTU model in the Digital heater family.

Powerful 399K BTU Heating

The R406A is one of the larger heaters in Raypak’s residential Digital series.

Its 399,000 BTU/hr input provides substantial heating capacity for applications where faster temperature recovery is important, including:

• Large residential swimming pools

• Pool and spa combinations

• Attached spas

• Standalone spas

• Replacement heater installations

• Equipment-pad upgrades

Actual heating time depends on pool volume, starting water temperature, desired temperature, ambient conditions, plumbing design, and heat loss.

Digital Controls

The Raypak Digital platform provides straightforward electronic temperature control and operating information.

The digital system allows the homeowner or service professional to adjust heater settings without relying on older mechanical-style controls.

Raypak’s digital heater platform also incorporates diagnostic capabilities that help technicians identify operating conditions during troubleshooting and service.

Plumbing & Water Flow

Raypak rates the Digital R406A for water flow up to 100 GPM.

Proper plumbing, circulation, and system flow are essential for reliable heater operation. The circulation pump, filter, valves, and plumbing should be sized and configured according to Raypak installation requirements.

Installation Requirements

Gas pool heaters must be installed by a qualified pool and gas equipment professional.

Installation should include verification of:

• Correct natural gas supply

• Proper gas line sizing

• Required gas pressure

• Correct electrical supply

• Proper bonding and grounding

• Adequate water circulation

• Proper clearances

• Appropriate ventilation and venting

• Local building and fuel-gas codes

Indoor installations require particular attention to combustion-air and venting requirements.

Never substitute a propane heater for a natural-gas installation or attempt fuel conversion unless specifically permitted using the correct manufacturer-approved components and procedures.

Frequently Asked Questions

How many BTUs is the Raypak R406A?

The R406A has an input rating of approximately 399,000 BTU/hr.

Is Raypak 009223 natural gas?

Yes. This listing is for the natural gas configuration.

What voltage does the R406A require?

The Digital R406A platform supports 120/240VAC, single phase.

What is the thermal efficiency?

Raypak lists the Digital R406A at approximately 82% thermal efficiency.

Can this heater be used for a spa?

Yes. The R406A is designed for pool and spa heating applications.

Can I install this heater myself?

Professional installation is strongly recommended. Gas supply, combustion, venting, water flow, electrical connections, bonding, and grounding must comply with manufacturer requirements and applicable codes.

Important Purchase Notice

Before ordering the Raypak R406A 009223, verify the required:

• Fuel type

• Heater capacity

• Gas supply and line sizing

• Electrical configuration

• Plumbing configuration

• Venting requirements

• Installation clearances

Gas heaters should be sized and installed based on the specific pool or spa application.