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Looking for Halon helm panel light

  • Thread starter Thread starter SeaEric
  • Start date Start date
  • Replies Replies 52
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Halon does not displace the air in the er like co2 but instead mixes with it. It stops the combustion process and when evacuated you can restart the engines.

That's why the bottles are so much smaller than co2 systems. They both perform the same function with different chemistry.

Kind of like hard vs ablative bottom paint.
 
The point being, you need to get the concentration of Halon below 6 or 8% to have a chance at combustion following a flooding of the engine room with the Halon. The suggestion this can be done in 10 seconds or so, seems totally unrealistic to me. But only a test will provide the answer. Meanwhile, why bet your life on it or anyone else's?

Pete
 
That's why you install a properly sized tank. The tanks are for a certain number of cubic feet of engine room. Too much will take longer to clear. Too little and you keep burning.
 
Scott, I read the chart at the link provided. Did not see any reference what so ever to being able to restart the main DD engines after 10 seconds of running an undefined blower or blowers in the engine room. That chart was useless for purposes of providing substantiation of your opinion. Our discussion is your claim that after 10 seconds or so you can restart. My opinion is that is not going to happen. Neither of us have any test results to prove our opinions. Therefore, I say until the test results are available I recommend no one bet their life or anyone else's on a 10 second restart. Let's agree to disagree in our opinions as there are no facts.

BTW, you do realize that chart is not for Halon, which is what we are discussing? The chart is for HF227ea which has a totally different mechanism for extinguishing fires than Halon.

Pete
 
Last edited:
My G-d do you ever take someone's word from experience or do you question everything to be difficult. You could teach my wife.

Put in a system and test it if you don't believe it.

I'm not the only one to install these. Many manufacturers include them in new boats.The manufacturer has engineered the systems and included the override BECAUSE the engines can be restarted. It would be dangerous and foolish to disable the engines without being able to restart them. Diesels engines will be able to restart and could even run with the halon at certain concentrations therefore the need to shut them down during the fire event.


Again most diesel engines will run with the halon in the compartment which is why there is a shut down needed.
 
Scott, you are simply incorrect. Diesel engines will not run with an air intake of 10% Halon for sure, maybe even an 8% concentration of Halon in the air intake. The override will work once this concentration has been reduced. The override is provided for multiple purposes, anything that reduces the pressure in the tank, even while the tank is having annual service, or was discharge yesterday. You have already stated that you have never seen a restart within 10 seconds of an engine room flood, but insist it will work with some undefined blower operational for 10 seconds. And yes empirically derived knowledge is valuable, but you do not have it on this subject. And I will add there are definite limits on the value of empirically derived knowledge, where science is required.

And if you consider not agreeing with you when you are incorrect difficult, so be it.

Pete
 
Eric, if by chance you can salvage your Halon tank with the charge still in the container, you might consider having a new custom faceplate made and include both the light and a small 12 volt alarm. You will need to add under the console a relay since the Halon tank sensor is a NC contact and you want the alarm to sound when the sensor contacts open. You could get extra fancy and include a simple toggle switch in one of the wires to the alarm so you can shut it off manually.

Pete
 
Pete said:
Scott, you are simply incorrect. Diesel engines will not run with an air intake of 10% Halon for sure, maybe even an 8% concentration of Halon in the air intake. The override will work once this concentration has been reduced. The override is provided for multiple purposes, anything that reduces the pressure in the tank, even while the tank is having annual service, or was discharge yesterday. You have already stated that you have never seen a restart within 10 seconds of an engine room flood, but insist it will work with some undefined blower operational for 10 seconds. And yes empirically derived knowledge is valuable, but you do not have it on this subject. And I will add there are definite limits on the value of empirically derived knowledge, where science is required.

And if you consider not agreeing with you when you are incorrect difficult, so be it.

Pete
Click to expand...

PLEASE CALL FIREBOY XINTEX.

Heres the number.

616-735-9380

Get technical support on the line and ask the question.

Then please post the results along with the apology.
 
http://www.fireboy-xintex.com/automatic-marine-engine-shutdown-systems/

I think the statement at the top of the page is pretty clear and while it doesnt mention the now defunct halon, the requirements for an engine shutdown module were identical.

No shut down and the agent gets blown out the exhaust... whether it's 10 seconds or 30 is irrelevant. There is no worst event than a fire on a fiberglass boat.
 
This is a discussion of installed HALON fire suppression. Read the first few posts again. Please stop confusing the discussion by randomly using data about other agents.

Let's stay with the claim of a 10 second restart on the automatic shutdown. Show me and the other members the valid basis for that claim, on a Halon charged system.

No one should mislead readers that a Halon shutdown will allow a restart after 10 seconds.

Pete
 
re read post #29.

Call the manufacturer. They will surely know the answer.

From what I remember the 10 seconds is the time to discharge and fill the engine room.

The restart is based on hitting the override and turning the key.

Can you do all that in 10 seconds?


FWIW the fire may be out and start again if you restart the engine that was the source of the fire. Your supposed to check the er first.
 
Scott, it is your claim that restart can be accomplished after 10 seconds, not mine. I am the person disagreeing. Maybe a reread of the entire thread would help.

At least stay consistent with your opinion. Checkout your post #18.

Pete
 
Last edited:
OK you win. They wont restart ever. Once Halon is released into the atmosphere all diesels will stop. forever and ever.

Kind of like an emp for boats.

I will still stick by my statement that the engines can be restarted in 10 seconds from the time of shutdown. Unless you do not hit the override then they wont restart.
 
Boatsb said:
OK you win. They wont restart ever. Once Halon is released into the atmosphere all diesels will stop. forever and ever.

Kind of like an emp for boats.

I will still stick by my statement that the engines can be restarted in 10 seconds from the time of shutdown. Unless you do not hit the override then they wont restart.
Click to expand...

Do I sense a juvenile tantrum?

Pete
 
did you call the manufacturer and ask or are you going to stick with your opinion even though it's wrong because you can't accept the fact you made a mistake
 
Pascal said:
See A-2 on the third page...

http://www.gulfwidesafety.com/gws/docs/nvic_6-72_chapter6.pdf

It even states that in some cases engine speed could actually increase with halon
Click to expand...

May I respectively suggest a critical reread of the section. It addresses the continuing running of a diesel during the discharge of the Halon. Once again the response I receive fails to address the parameters under discussion, specifically the automatic shutdown of the DD by the Halon system, followed by 10 seconds delay, and then an attempted restart.

The scenario offered makes the point that the continuing intake airflow of the engines will dilute the concentration of Halon, thus not extinguishing the target fire. I think if the concentration will not suppress the combustion of the fire source in this circumstance, it is understandable that it will not suppress the internal combustion in the engine either.

I welcome valid data on this scenario. Someone may want to start a new thread on other Halon scenarios.

Pete
 
Boatsb said:
did you call the manufacturer and ask or are you going to stick with your opinion even though it's wrong because you can't accept the fact you made a mistake
Click to expand...

Debate rules place the burden of proof for a claim on the party making the claim, that is you. I assume you have a telephone that can serve that purpose. So, I will await the substantiation of your claim in post #18, not any other set of circumstances.

Pete
 
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