Question on LP to NG Conversion on RayPak/Rheem 406a

[mrxerox]

Hello gang,

I purchased a used Rheem/RayPak 406a pool heater that is set up for propane and I am wanting to convert to natural gas. I purchased the kit in the attached picture but I am not seeing a pressure regulator on my unit that matches any of the parts I have. Any help would be greatly appreciated!

 

[ajw22]

Welcome to TFP.

What specific model number heater are you converting?

I suspect the kit you have is for a MV heater and you have a digital heater. For the digital heater you will need to replace the entire Burner Tray w/ Gas Valve NAT IID.

This is the gas valve and not a pressure regulator...

The pressure regulator, if you need one, is not part of the heater and external to the heater on the gas piping to the heater.

Honeywell says: Natural to LP and LP to Natural conversion kits available for standard and slow opening gas valves.

https://customer.honeywell.com/en-US/Pages/Product.aspx?cat=HonECC%2520Catalog&pid=VR8304K4822/B&category=VR8304&rank=8&catpath=1.2.3.9.6&rank=8&v1=Sort.1.Product.Rank&asc=1

Maybe @swamprat69 has experience with this.

 

[mrxerox]

@ajw22 Thanks for the reply. After more digging I see that I have a unit with electronic ignition and the conversion kit I purchased is for a unit with a millivolt gas valve. Do you or anyone else know if I can use my current valve for NG or will I need to replace it? If replace, would anyone happen to know the honeywell valve part number for a 406a heater? The pool supply houses want crazy prices and they always hide the part number LOL Thanks in advance!

 

[ajw22]

@ajw22 Thanks for the reply. After more digging I see that I have a unit with electronic ignition and the conversion kit I purchased is for a unit with a millivolt gas valve.

Yup, that is what I suspected.

Do you or anyone else know if I can use my current valve for NG or will I need to replace it? If replace, would anyone happen to know the honeywell valve part number for a 406a heater? The pool supply houses want crazy prices and they always hide the part number LOL Thanks in advance!

Maybe @swamprat69 @1poolman1 @JamesW knows.

 

[1poolman1]

This Honeywell part, VR8345M4302, is virtually identical to what is installed in a RayPak. While it is always listed as a 300K btu valve, the label often says 400K (never could figure that out). Honeywell's information says that it can be used for both because it will come with an adapter/conversion for LPG (at least all the ones I have purchased in the past have come with it). A natural gas valve will allow too much LPG through.

This is also available for much less:

Honeywell 393691 LP Gas Valve Conversion Kit​

 

[mrxerox]

@1poolman1 Thank you!