The Siren Board

Discussion of Outdoor Warning Systems
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 Post subject: Manual
PostPosted: Thu Oct 18, 2018 2:54 pm 
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On the top of my firehouse we have a siren that just went dead. Looking for a manual . The tag on the siren is Federal Enterprises Inc, Type 2 C 3 1/2 S, 7 1/2 HP, 220 volts 60 Hz. Any info would be greatly appreciated


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 Post subject: Re: Manual
PostPosted: Fri Oct 19, 2018 6:17 pm 
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Tom-g wrote: *
On the top of my firehouse we have a siren that just went dead. Looking for a manual . The tag on the siren is Federal Enterprises Inc, Type 2 C 3 1/2 S, 7 1/2 HP, 220 volts 60 Hz. Any info would be greatly appreciated
The siren is a Federal Enterprises Model 7. A manual can be found here. It’s named Model 5 in this manual due to a naming error on Federal’s part, but this should tell you what you need to know.

http://www.civildefensemuseum.org/siren ... 5A154F.pdf


Some general information can be found on the Wiki:
https://wiki.airraidsirens.net/Model_7

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 Post subject: Re: Manual
PostPosted: Fri Oct 19, 2018 8:46 pm 
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Thanks Tyler


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 Post subject: Re: Manual
PostPosted: Wed Oct 31, 2018 12:35 pm 
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How did it go dead?


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 Post subject: Re: Manual
PostPosted: Wed Oct 31, 2018 5:15 pm 
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Just stopped going off for calls. Testing showed only 18A starting current. Sometimes it starts but never gets up to full speed. Have it shut off right now until we get time to get up on the roof and pull the access panels.


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 Post subject: Re: Manual
PostPosted: Tue Nov 13, 2018 1:22 pm 
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Sounds like a power supply or wiring issue if it "only" pulls 18A when starting up. Try replacing all the high wattage wiring with new wire of equivalent or thicker gauge.


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 Post subject: Re: Manual
PostPosted: Tue Nov 13, 2018 1:58 pm 
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Just pulled it off the roof yesterday. On its way to the motor shop.
All the building wiring looked fine


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 Post subject: Re: Manual
PostPosted: Tue Nov 13, 2018 3:57 pm 
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Real Name: Alexis Trinquet
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Eithier the brushes are shot (assuming it has an induction-repulsion motor) or something is wrong with the motor's windings (be it armature or not)

given you said it only rarely start, I bet it's the brushes that are shot, given they don't make or make poor contact with the armature rotor, thus maybe why it sometimes never gets to full RPM.

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 Post subject: Re: Manual
PostPosted: Tue Nov 13, 2018 4:56 pm 
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That is what I am hoping, it’s just the brushes.


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