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Old 02-10-2019, 10:09 AM  
OldDan1943
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City: Aventura FL
Country: USA
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 3,010
The advantage of a raw water discharge alarm is to notify you of an impeller failure or plugged up sea strainer, forgot to open the hull valve.
In theory, the alarm temp is set low enough so as to give you time before eating another impeller or other damage.
There is one company, to my knowledge, that makes an add on unit. I have two until, in the storeroom, waiting to be installed. One for the main engine and one for the generator.
I have looked for any notes I might have but, none available. I have to go to the storeroom soon. I shall try to remember to bring them back.
Injection temp is nice incase a MOB. A low temp does have a way of motivating a faster recovery.
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