Raypak RP2100 Digital Low NOx Heater - R407AL - Copper - Natural Gas - P-R407AL-EN-C #26



Model # 009243

By Raypak

  5 Average  



Model # 009243

Warranty 1 Year

Manufacturer Code P-R407AL-EN-C #26

Alternate Part #'s 009243, P-R407AL-EN-C #26, RAY009243

Product Description


  • Digital control with liquid crystal display (LCD) for temperature selection and heater settings

  • Digital Display monitors heater operation and shows service status
  • 4 Model Sizes
  • Unit comes standard with stackless top
  • Electronic Ignition
  • Copper fin tube heat exchanger desighn
  • Dual Voltage capability 120/240V
  • Easily converted to left hand water and electrical connections
  • Quiet FanCapron resin headers prevent rust stains from harming pool surface
  • Plumb directly from provided 2" PVC threaded union
  • Smart microprocessor controls diagnostic read-out and continuously monitors operating status
  • Completely field serviceable
  • Small footprint
  • High efficiency
  • Guaranteed high wind reliability
  • Looks smart and works smart
  • 1 Year Warranty
  • Thermal Efficiency of 83% 




This Limited Warranty does NOT apply; 
1. if the product has been moved from its original place of installation, or if the original 
owner no longer owns the property where the original installation was made; 
2. if the product is not properly installed with a pool or spa by a qualified licensed installer in 
accordance with applicable local codes and ordinances, good trade practices, and the 
manufacturer’s installation instructions; 
3. if the rating plate(s) or serial number(s) are altered or removed; 
4. if the product is modified in any way, or non-factory authorized accessories or other 
components are used in conjunction with the product; 
5. to damage, malfunctions or failures resulting from failure to properly install, operate or 
maintain the product in accordance with the manufacturer’s instructions; 
6. to damage, malfunctions or failures from abuse, act of nature, accident, fire, flood, freeze, 
lightning or the like; 
7. to damage, malfunctions or failures resulting from [or due to] connected system control 
8. performance problems caused by improper sizing of the heater or electric service 
voltage, wiring or fusing; 
9. use of any attachment, including any energy saving device not authorized by the 
10. to damage, malfunctions or failures from misuse or neglect, including but not limited to, 
freeze-ups, operating the heater with the cabinet door off, having flow restrictions or 
obstructions between the heater outlet and the pool/spa, or not maintaining a proper 
chemical balance (PH level must be between 7.4 and 7.8 and total alkalinity between 100 
and 150 PPM. Total dissolved solids (TDS) must be no greater than 3000 PPM)

Product Specifications

407,000 BTU
0-5,000 ft.
Special Feature:
Low NOx Emissions
Heat Exchanger:

?     Asked on 5/8/2020by Inyo Visitor

how close can the fence be to this unit?

A  Answered on 1/6/2021 by InyoPools Product Specialist Hector F.

Hello, you will want to contact your city hall to confirm the code requirements in your area. 

?     Asked on 1/17/2020by Cliff jamer

Is this unit new and what’s the warranty if self installed raypak pr407aenc

A  Answered on 1/31/2020 by InyoPools Product Specialist Lennox H.

Hi, Cliff. These units are new and will be warranted for ninety (90) days - one (1) year from the Effective Date, parts and labor, for the HEATER and component parts based on if it's a completely new install or a replacement.

?     Asked on 4/10/2019by paula thomas

how many gal will this heat heat. i have one of your units that needs replacing it's 15 yrs old and gone bad i have 16,000 gal pool. i what A heater that heats up to at least 25,000 to 30,000 gals. thanks Paula Thomas

A  Answered on 4/27/2019 by InyoPools Product Specialist Lennox H.

Hi, Paula. This unit will be sufficient to heat a 25,000-30,000 gallon pool. However, may not be as efficient as using two units depending on how fast you want the pool to reach the desired temperature. 

?     Asked on 2/24/2019by Herb

Would this be a suitable replacement heater for a 25-30,000 gal pool?

A  Answered on 2/25/2019 by InyoPools Product Specialist Michelle B.

Hello, Yes, that would be a proper size for your pool.

?     Asked on 8/14/2018by Wayne Reynolds

I have a very old Raypak 2100 and am looking to replace it. Will this model work as a good alternative?

A  Answered on 8/17/2018 by InyoPools Product Specialist Lennox H.

Hi, Wayne. Yes, this unit will be a suitable replacement based on your existing model and pool size. 

?     Asked on 7/20/2018by Inyo Visitor

would this be a replacement for P-M407A-EN-C. Sorry I mistakenly left the same question for the one without the LoNox option.

A  Answered on 7/20/2018 by InyoPools Product Specialist Lennox H.

Hi. Yes, this unit is the same as model P-M407A-EN-C. 

?     Asked on 5/14/2018by Stephen D Harvey

is Raypak PR407AENC approved for use in Orange County California?

A  Answered on 5/15/2018 by InyoPools Product Specialist Charlie R.

Stephen, Yes, if you live in Orange County, CA, you need a LoNox heater. 

?     Asked on 2/5/2018by Inyo Visitor

Please verify that this LoNox 407000 BTU NG RayPak heater is ok for RIVERSIDE COUNTY, CALIFORNIA

A  Answered on 2/6/2018 by InyoPools Product Specialist Lennox H.

Hi. This RayPak LoNox Heater is ok to be installed in Riverside County, CA. 

?     Asked on 11/23/2017by Aaron

what is error code-Limit#1

A  Answered on 11/29/2017 by InyoPools Product Specialist Megan C.

Hello, Aaron. I was unable to locate a definition for Limit#1. If the board is reading HL1 that means, The high-limit has exceeded 135F. The possible solutions are. 1. Possible excessive water temperature in the tube bundle. Once heater cools, high limits resets automatically.2. Check for blockage in tubes.3. Check for low water flow.4. Check Unitherm governor- replace if necessary 5. check bypass assembly- replace spring or bypass if necessary. If that is not correct for you, you may contact Raypak directly at  805-278-5300. (Raypak Heater Fault Code Guide)

?     Asked on 6/28/2017by linda

how far does the pool heater have to be from the house - huntington ny

A  Answered on 6/29/2017 by InyoPools Product Specialist Joe S.

For U.S. installations, the point from where the flue products exit the heater must be a minimum of 4 ft below, 4 ft horizontally from, or 1 ft above any door, window or gravity inlet into any building. The top surface of the heater shall be at least 3 ft above any forced air inlet, or intake ducts located within 10 ft horizontally

?     Asked on 6/16/2017by JY

Hi, Is this heater a good replacement for a Jandy LX400N-L? Does it support automation from a Jandy Aqualink RS as well as dual temperature for pool and spa? Thanks!

A  Answered on 6/25/2017 by InyoPools Product Specialist Lennox H.

Hi, JY. This Raypak heater can be used to replace the LX400N-L unit. It has a Pool & Spa mode and will be able to be controlled by the AquaLink RS system. 

?     Asked on 10/19/2016by John

I have a 14 Year old Raypak 2100 (P-R405AL-EN) Pool/Spa heater. BTU/HR Input is 399,000 Natural Gas. The decal on the front reads LoNoX but looking at the circuit board, I can clearly see that the LoNoX jumper is installed. Question: Which Replacement Heater do I need? I believe I need the (P-R407A-EN) Since the jumper is left installed on circuit board, I'm curious whether I can use the R406A model. Just want to be sure that I get the correct replacement.

A  Answered on 10/19/2016 by InyoPools Product Specialist Scott W.

Yes John, the 009243 would be the correct replacement heater for your current heater. If you have any further questions please don't hesitate to email back.

?     Asked on 5/31/2016by Inyo Visitor

I live in Orange County, do I have to buy a LoNox heater?

A  Answered on 6/1/2016 by InyoPools Product Specialist Lennox H.

Hi, If you're located in Orange County, California you will need a LoNox heater.

?     Asked on 10/10/2012by Guest

What is the difference between an Electronic and Millivolt ignition?

A  Answered on 10/10/2012 by InyoPools Product Specialist Patrick P.

The basic answer is that Millivolt is the old style of ignition, using a standing pilot light. While the electronic ignition uses a spark start system like a gas grill. Electronic ignitions are more efficient in gas usage and also are better suited for high wind areas where a pilot light might get extinguished.

?     Asked on 1/16/2012by Guest

Will a gas heater operate at the low speed of a dual speed motor?

A  Answered on 1/16/2012 by InyoPools Product Specialist Patrick P.

Probably not - Most gas heater will shut off at low GPM levels (20-40) to keep the heater cores from overheating - 20 for 200 BTUs, 40 for 400 BTUs. Depending on your pool system you might get these GPM levels at the low speed but generally these heaters must be run at the motor's high speed.


Est. Repair Time

2 to 4 hrs

Tools Needed

Screwdriver, Pliers, Wrench Set

1     0

Replacing an old gas heater

Written on 8/10/2017 by Guest

Replacing an old Raypak gas heater. I first had to dismantle the old heater and remove it. I changed some of the gas connectors. First thing that I did was connect the gas line to the heater once that was done, I connected the water lines to the heater and lastly did the electrical connection. The replacement was not very hard because I was replacing Raypak with Raypak. This Raypak heater is much stronger and I am able to heat the water much faster than the old one. I have inground around 30000 gallon pool and I am able to heat it in few hours. I am very happy with this new heater.

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