Skip to main content ↑ ↓
Topic: Engine Fire Suppression Installation (Read 1362 times) previous topic - next topic

Re: Engine Fire Suppression Installation

Reply #25 –
Quote from: Protech Racing –
Maybe the aircraft and commercial bus units have some sort of antifreeze solutiion. That would make sense  as frozen stuff wont  eject. Check the man and get back to us.  The racer units have a  warning  about freezing. 

Great point about freezing. When we refilled our foam units for their first recharge, the agent did include a chemical to prevent freezing. I had never in the first five years of use in our coach finding these units freezing up. I am coming up to my next five year cycle in a few months - equalling a total now of ten years our foam system has been in our coach. Never a problem with them and I found my units similar to the ones we used in our buses. I think since these units are never exposed directly to cold windy nights and tucked up high enough from the ground, they do not freeze up. Naturally the foam unit in the hydro hot cabinet is keep toasty warm with the hydro hot running.
Bob
Bob & Kathy
2007 Nimbus
Full Timers
Retired Charter Bus Owner/Operator

Re: Engine Fire Suppression Installation

Reply #26 –
Quote from: Protech Racing –
Maybe the aircraft and commercial bus units have some sort of antifreeze solutiion. That would make sense  as frozen stuff wont  eject. Check the man and get back to us.  The racer units have a  warning  about freezing. 
No manual came with the unit but here's an email convo with the Amazon vendor:

[Mark]: Can this unit be mounted where it is exposed to freezing temperatures?  Will it still work below freezing?

[Vendor]: Yes, there is room in the container for freezing expansion.  The foam inside turns slushy when it is exposed to freezing temperatures. Heat of engine running will warm it up and it will thaw.  The unit will deploy once the ambient temperature near the heads reach 286 degrees.

[Mark]: For 24/7 protection should it be kept from freezing?

[Vendor]: Yes
Mark Duckworth
2003 U320 4220
Build 6199, Motorcade 17971