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Old 12-30-2019, 10:14 AM   #1
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New Horizons Owners Club
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Question Majestic FireFly – LP level displayed along with water/waste tank levels?

I’ll put the question up front: Those that have the Majestic-level FireFly system option, does yours display LP tank levels?

I searched the NHOG forum for some direction on this, but couldn’t find anything; apologies if this is answered elsewhere. NH has told us that there are no LP level sensors installed on the NH system, which is fine if it’s accurate. We’re prepared to get something after-market. We just want to keep our equipment shopping list short until we know our rig a bit better, but because we’re picking up our Summit in February, it seems an LP level sensor would be pretty useful right away. We know the FireFly system can monitor, and at least display, levels. It's a bit surprising that the NH rigs don’t come with something, and just wanted to double-check.

Thanks for any info. We’ve found this forum to be a great source.

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Old 12-30-2019, 10:37 AM   #2
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Nope, not ours anyway. It would be a nice feature however.

Dave & Diane
40' New Horizon (New Horizon Ambassador) / 2018 Ram 5500 w/ Classy Chassis Hauler Bed
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Old 12-30-2019, 10:56 AM   #3
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Originally Posted by HDrider View Post
Nope, not ours anyway. It would be a nice feature however.
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Old 12-30-2019, 03:21 PM   #4
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Griffon -

As far as I know, there is no continuous monitoring system for propane bottles. Pressure gauges just show the pressure, and with propane, the pressure is pretty constant until "empty". I think the LP Level is more for if you get the 100# tank option (like in a Class A).

There are several ways one can test the level of propane in a bottle. Weight. The strip on the side that one pours water on. Visual inspection when propane is being pulled from the bottle - condensation on warm days or icy coating on cold days. Etc.

I have a tester from Truma that is wonderful! Yes, it is expensive, but it is made to test propane levels in bottles. It uses ultrasonic technology to test for gas or liquid within the tank. It is small enough I can even reach around the outside bottle to test the inside one. Though I originally ordered mine from Truma directly, it is now available on Amazon: https://www.amazon.com/LevelCheck-Pr.../dp/B07B5TSRJT

Just my two cents,
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Old 12-31-2019, 12:02 PM   #5
Join Date: Sep 2017
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The 40 lb bottles NH installed on my 2016 Majestic already have mechanical gauges built into the top of the bottles. They read full until the bottle is about half empty, and then go to zero as the bottle is empty. Once you know that it works great. You still have to open the door and look, so its not as good as having the reading indoors from the Firefly, but is still simple and easy to use.
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Old 12-31-2019, 12:06 PM   #6
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Procedure for using the Propane Automatic Switchover Valve

I hear regularly of people emptying both propane bottles and not realizing it until they have no propane.

It is important to understand how the propane bottle automatic switchover valve works and how to use it properly.

The little paddle on the valve does NOT switch the tanks, it only determines which tank the gauge is looking at. The automatic valve switches to the tank it first sees pressure from. When the pressure goes to zero on that tank, the valve automatically switches to the other tank, and stays there until the pressure goes to zero. It works this way regardless of the position of the little paddle.

Here is the procedure to use it properly:

Procedure "A". Use whenever:
- First time to set it up properly or,
- Whenever both tanks have been disconnected or,
- Whenever both tank valves have been closed.

1) Close the valve on the backup tank (lets call it tank 2) so there is no pressure from it. The backup tank 2 is the one that is full. Tank 1 is the one you want to use first.
2) Open the valve for tank 1 (if not already open).
3) Flip the paddle to tank 2.
4) Use some gas until the indicator goes red. The internal valve will switch to tank 1.
5) Flip paddle to tank 1. It will go green to indicate there is pressure from tank 1.
6) Open valve on tank 2. This puts tank 2 on standby, ready to supply propane when tank 1 is empty.

Procedure "B" - normal operation to follow once set up properly as per Procedure "A above:

1) Regularly check the indicator. If green, all is well - tank 1 still has gas, and tank 2 has not been used. If the indicator is red, go to step 2.
2) When the indicator is red, the tank the paddle is pointing at is empty. The automatic switchover valve already switched to the other tank and has been providing gas from that tank.
3) Close the valve on the empty tank.
4) Flip the paddle to the full tank. It will turn green.
5) Get the empty tank filled.
6) Reinstall the new tank and open its valve.
7) That's it. The system will empty the current tank and then automatically switch to the one you just filled. The whole process repeats, alternating between tanks as they go empty.

Important information to understand! The automatic valve will switch to the first tank it sees pressure from, and stay there until there is no pressure. So here is the scenario that gets people in trouble:
- both tanks were disconnected (like when you get them both filled at the same time)
- you open the tank 2 valve first, then tank 1
- you flip the indicator to tank 1
Because the automatic valve saw tank 2 pressure first, it draws gas from tank 2 until it is empty. The indicator stays green because the paddle is looking at tank 1. The valve switches to tank 1. The indicator turns red when tank 1 is empty, but now its too late because both tanks are empty.

So its very important to understand that the valve switches to the first tank it sees pressure from, regardless of the position of the paddle.
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Old 12-31-2019, 07:25 PM   #7
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Thanks everyone for the great information. Geo-gypsy, we’ve come across sensors like that one, and it’s really good to get first-hand feedback on the Truma version. Burrington, that useful detail is much appreciated. That’s been sent to the printer and we’ll be using that from day one in February. It's one more thing on which we can go into the orientation with a bit more than basic knowledge. With this info, we’re just going to get more familiar with our rig first, and over time see if we really need a remote sensor solution for this.

Happy New Year!
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Old 01-01-2020, 09:51 PM   #8
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We have the 100# LP tank and the Firefly definitely records the % remaining. Our two 40# tanks operate as Bill indicated.

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fire, tank, water

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