I have a Universal M4-30 diesel in my 1974 O'Day 32' CC that originally had an Atomic 4 gas engine. There was a Fireboy Halon 1301 automatic fire supression system, which I plan to replace, and Xintex can't tell me how to implement a fuel shutoff to kill the engine when the system discharges, as my engine is not electronically controlled. Does anybody know how this can be implemented?
Universal M4-30 fire shutoff system
- Thread starter jknappsax
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Is interrupting the power the method you're suggesting?
When I start my engine, the procedure is to hold in a button that starts the fuel pump and heats up the glow plug, then kicking the starter with a second button. Killing the engine is accomplished by pulling up on a lever that starves out the fuel. I don't know if just interrupting power to the fuel pump will do the trick. And I need to figure out how to trigger this if the automatic fire suppression discharges. A NC relay should be easy to implement, but I'm probably overlooking something important.
When I start my engine, the procedure is to hold in a button that starts the fuel pump and heats up the glow plug, then kicking the starter with a second button. Killing the engine is accomplished by pulling up on a lever that starves out the fuel. I don't know if just interrupting power to the fuel pump will do the trick. And I need to figure out how to trigger this if the automatic fire suppression discharges. A NC relay should be easy to implement, but I'm probably overlooking something important.
Well i dont know of any motor that auto shuts down becasue of the danger a false shutdown could cause which is why even oil pressure and water temp only sound alarms
The fuel pump should really be wired in a way that requires the motor to be cranking or running to stay on in normal use
The fuel pump should really be wired in a way that requires the motor to be cranking or running to stay on in normal use
Your engine would not stop running by interrupting power if your pulling a lever to close off fuel flow. You would have to do as Ross has suggested, install a solenoid in your fuel line & interlock it with the fire suppression system. Just be to wire into the engine's ignition circuit so you not creating a parasitic electrical draw when the motors not running.
Bob
Bob
RAD, here on this forum, has an O'Day 32' CC with a diesel, and he told me he doesn't think a fire suppression system is necessary with a diesel. Seems to make sense, as diesel isn't very flammable or explosive. And as posters to this thread have pointed out that that solenoid is just another failure point. I will add a CO detector.
Some construction equipment has low oil pressure engine shutoff circuits. The oil pressure gauge is a meter relay, if the oil pressure drops below safe levels the engine shuts down before it distroys itself.
From what I had read, Halon is no longer used, and Xintex's website lists two alternate clean agent systems. When I called about recharging my system (it was last checked in 1988-89), they told me they no longer service these units, and I would need to go over to one of their current systems.
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