SprinklerDesigner2
Mechanical
- Nov 30, 2006
- 1,251
Or to be more accurate did I screw up?
The original diesel engine fire pump and controller was installed 42 or 43 years ago and a couple months ago we got the order to replace it.
I copied everything down I could find on the controller,serial, model numbers and such, and ordered a new one.
Got it installed, it wouldn't work and someone finally noticed the battery wiring and turns out the old controller was a positive ground. Egg on my face, some really unhappy people with yours truly.
Taking a closer look we found a note as to positive grounding on the inside of the door a wiring diagram that took real effort to read after 43 years. I never thought to look there. My bad.
I never saw a positive ground controller before and calling Firetrol they said they stopped making them years ago.
So my question to you is how often do you run into a positive ground controller? 30%. 10%, 2% of the time or are you like me and never saw one before?
The original diesel engine fire pump and controller was installed 42 or 43 years ago and a couple months ago we got the order to replace it.
I copied everything down I could find on the controller,serial, model numbers and such, and ordered a new one.
Got it installed, it wouldn't work and someone finally noticed the battery wiring and turns out the old controller was a positive ground. Egg on my face, some really unhappy people with yours truly.
Taking a closer look we found a note as to positive grounding on the inside of the door a wiring diagram that took real effort to read after 43 years. I never thought to look there. My bad.
I never saw a positive ground controller before and calling Firetrol they said they stopped making them years ago.
So my question to you is how often do you run into a positive ground controller? 30%. 10%, 2% of the time or are you like me and never saw one before?