CNG to propane conversion

GrandpaSteve

Sustaining Member
There should be a stainless safety rail running in front of the stove. I installed the panel just to the right of the right end of that rail, where shown in the attached picture. The factory wiring diagram shows a gray wire (maybe with white stripe?) for the "Stove" circuit from the DC panel. I found two coils of wire fitting that description, one near the factory propane locker at the stern, and another in the area of the tilt-out plate cabinet, so it was just a matter of making connections with new stuff in those two areas. The stove circuit breaker can energize the Xintex panel, and that panel controls the solenoid valve.

If you install your panel is that same location, be sure and allow space for the large diameter "nut" to go onto the rear of the Xintrex. The ice box is very close by.


View attachment 44441
I have to find those wires.
 

Prairie Schooner

Jeff & Donna, E35-3 purchased 7/21
Thanks @peaman - that location worked out perfectly. Never mind that I thought I could get away with a 2 1/8" hole saw for the Fireboy Xintex LPG control panel (when the box and instructions clearly said 2 1/16"). Let's just say that my control panel is more of a flush mount into the cabinetry of the 32-3. And, wait, where does one even buy a 2 1/16" hole saw?! Don't answer that... more important question below

I've been trying to avoid buying a few more parts and I staged this configuration today. I can't find anything in the manual for the solenoid valve about mounting position. There's clearance at the top for the pressure gauge and enough room at the bottom to join the appliance LPG hose at the bottom. Can anyone see anything wrong with this setup?

View attachment 44663
Hi Bryan,
We're heading into this project. How did this arrangement work for you? Is it documented elsewhere here? Is there anything you'd do differently?
Thanks, Jeff
 

vanilladuck

E32-3 / San Francisco
Blogs Author
Hi Bryan,
We're heading into this project. How did this arrangement work for you? Is it documented elsewhere here? Is there anything you'd do differently?
Thanks, Jeff

Ahoy, Jeff! I took a lot of photos but didn't document much... yet. If it would be helpful I could write a quick blog article detailing my process and the results?

I changed a few things with my setup from the photos previously in this thread.

The toughest thing I remember was pulling the LPG hose and sniffer sensor cable through the hose-conduit between the galley and the starboard lazarette.

The one thing I would change is buying a slightly longer LPG hose. Per ABYC guidelines they are pre-measured and pre-terminated with NPT connectors. Having one a little longer would have allowed for better "dressing in" high in the laz...
- Bryan
 

Prairie Schooner

Jeff & Donna, E35-3 purchased 7/21
Ahoy, Jeff! I took a lot of photos but didn't document much... yet. If it would be helpful I could write a quick blog article detailing my process and the results?

I changed a few things with my setup from the photos previously in this thread.

The toughest thing I remember was pulling the LPG hose and sniffer sensor cable through the hose-conduit between the galley and the starboard lazarette.

The one thing I would change is buying a slightly longer LPG hose. Per ABYC guidelines they are pre-measured and pre-terminated with NPT connectors. Having one a little longer would have allowed for better "dressing in" high in the laz...
- Bryan
Thanks, Bryan. That info is helpful and I'd appreciate any more you could put on the site for what you did. @peaman has already been a great help. I'm an almost pathological gatherer of perspectives before I commit to a plan.

I found a new Force 10 on Craigslist, along with much of the needed gear. So, we've got that going for us. It's the bigger Trident control unit, but it does both sniffer control and on/off.
stove Force 10_5410.jpg
 

Prairie Schooner

Jeff & Donna, E35-3 purchased 7/21
Ahoy, Jeff! I took a lot of photos but didn't document much... yet. If it would be helpful I could write a quick blog article detailing my process and the results?

I changed a few things with my setup from the photos previously in this thread.

The toughest thing I remember was pulling the LPG hose and sniffer sensor cable through the hose-conduit between the galley and the starboard lazarette.

The one thing I would change is buying a slightly longer LPG hose. Per ABYC guidelines they are pre-measured and pre-terminated with NPT connectors. Having one a little longer would have allowed for better "dressing in" high in the laz...
- Bryan
Hi Bryan,
I measured the boat today and it's about 11' from the stove to the propane well. A 15' hose would leave a couple feet on each end to neaten the install. If it were you, would you bump up to a 20 footer? Anyone else is welcome to chime in, too. Is there a disadvantage to having a big loop in there?
Thanks,
Jeff
 

peaman

Sustaining Member
You want to have adequate extra at the gimbaled stove end for an easy and full swing, and you want enough to make the distance to the propane locker, without needing to stretch or kink in any way, along a convenient path. Anything more than that will offer no advantages. It's not like line or wiring, or common tubing that you might want to cut off a bit and re-terminate later on. The factory-made end fittings are there to stay, and I doubt you would want to replace either end without replacing the entire length.
 

Prairie Schooner

Jeff & Donna, E35-3 purchased 7/21
You want to have adequate extra at the gimbaled stove end for an easy and full swing, and you want enough to make the distance to the propane locker, without needing to stretch or kink in any way, along a convenient path. Anything more than that will offer no advantages. It's not like line or wiring, or common tubing that you might want to cut off a bit and re-terminate later on. The factory-made end fittings are there to stay, and I doubt you would want to replace either end without replacing the entire length.
I think 15' would accomplish all that once installed. Per Bryan's comments, I was wondering if a little extra would make installation easier. And, that accomplished, is there any downside to having extra that is looped up and stored out of way? A loop should fit nicely between the propane tank well and the starboard quarter. And nothing else can be conveniently stored there. If I were to order custom hose, I'd get 17.5'. I think I'll wait until I pull the old hose out and measure it. Your idea of using a drilled fitting is pure gold.
 

Nick J

Sustaining Member
Moderator
Blogs Author
I just looked at my order and was surprised to find I used a 25' hose! I can't remember how much slack I had to store, but it fit well under the starboard cockpit coming. I'm headed down there after work. If I remeber I'll take a pick.
 

vanilladuck

E32-3 / San Francisco
Blogs Author
I ordered a 15' hose for my install and it reached, but with no slack. This is probably due to the path not being a very straight line between the galley and the propane locker. There's not enough leftover hose to zip-tie high in the starboard lazarette, so it lays on the shelf where the CNG tank used to mount.

A 20' hose would be perfect -- and I don't think there's anything wrong with having a bit of a service loop as long as it's lashed/zip-tied down well.

FYI: Pulling the hose through the flex conduit was not an easy task. Once I got the hose in place, I didn't want to change it out ;)
 
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