Connect with us

Ever done this?

Discussion in 'Security Alarms' started by JoeRaisin, Oct 8, 2005.

Scroll to continue with content
  1. JoeRaisin

    JoeRaisin Guest

    So this is how my day went....

    Installing a Vista 32-FB in a county building to monitor hte sprinkler
    system (they have both wet and dry systems)
    Got flex to all the flow and tamper boxes except one and am working on
    the last...
    First step, knock out the knock out on the back of the box - careful of
    the 110 bell circuit already wired to one of the switches.
    Put my punch on the perimeter of the knock out and tap with my
    hammer...nothing...
    Second tap and the box breaks off, the bell starts ringing and air
    shoots out of whats left of the pipe (it was the low air alarm)
    I put my finger over the hole to keep whats left of the air pressure
    (now at just over 30 lbs) in the system until I can get the water shut
    off (lesson learned there - shut it off FIRST)
    The water valve is chained and no key in sight. Bell ringing right over
    my head but nobody seems to notice. For at least 5 minutes I am
    standing there under a ringing bell with my finger blocking the hole. I
    figure If the clapper releases I will then have water shooting out of a
    1/4 inch hole with a lot more pressure than the air currently is.
    Finally someone notices me and I send them looking for the key to the
    chain holding the butterfly valve open.
    No key can be found and it takes several more minutes before bolt
    cutters can be found to cut the chain and shut off the water.
    The sprinkler guys show up later and replace the switch. The fella I
    spoke with said he has never seen one do that before, but theyt have
    recently started using plastic fittings to connect the tamper boxes to
    the pipes. (Plastic pipe, 3/4 od and 1/4 id)
    We tapped out both knockouts BEFORE mounting the box this time....

    Question: Anyone got a better way of getting rid of those knockouts? I
    thought of a 7/8 hole saw next time but not sure how well that may work
    since they tend to get grabby and either twist off the box or slam my
    drill (and hand) into something delicate or energized.

    I would rather not go through this again....

    BTW, I later found the key in the spinkler repair parts box next to the
    wet risers on the other side of the building (which is the first place I
    told them to look)
     
  2. Frank Olson

    Frank Olson Guest


    There's never an "easy" way, is there? Plastic pipe on a dry valve for a
    sprinkler system?? Not here! You'll see "blaze pipe" all over the place in
    most wet systems, but I've never seen it on a dry (which is mostly located
    in parkades and unheated out buildings) and *never* on any valve components
    (wet, deluge or dry). I do know the knockouts on some flow switches and
    other sprinkler devices can be a pain. I use an ice pick. I line it up
    with an edge of the knockout, not the centre. Once a bit of it is lifted
    away from the box, you can insert a screwdriver blade and twist the rest of
    it away. This doesn't put a great deal of pressure on the fittings.

    Of course, taking care of the knock-outs *before* you mount the device is
    always the best solution, but often times I'm not there when they're
    installed. The sprinkler guys I work with all leave one of the knock-out
    holes punched out for later connection. Some even leave plastic plugs in
    place. Now *thats* thoughtful.
     
  3. Crash Gordon

    Crash Gordon Guest

    Coulda been worse, you coulda forgotten to put the system on test at cs.


    | One very embarrassing moment for me was a demo to a teacher in our school,
    | who had just set off a false panic alarm . After the staff and students
    were
    | calm and settled, I went to the room that sent the panic and talked to the
    | teacher. Look, I told him, you have to hold the button down for two
    seconds
    | (5802MN) to set off the alarm. Watch, I said. Push, push, push,
    | SIRENS!!!!!!!!! What a way to find out the remote samples at two sec,
    and
    | doesn't care what you do in between!
    |
    | Rick
    |
    |
    | | > So this is how my day went....
    | >
    | > Installing a Vista 32-FB in a county building to monitor hte sprinkler
    | > system (they have both wet and dry systems)
    | > Got flex to all the flow and tamper boxes except one and am working on
    | > the last...
    | > First step, knock out the knock out on the back of the box - careful of
    | > the 110 bell circuit already wired to one of the switches.
    | > Put my punch on the perimeter of the knock out and tap with my
    | > hammer...nothing...
    | > Second tap and the box breaks off, the bell starts ringing and air
    | > shoots out of whats left of the pipe (it was the low air alarm)
    | > I put my finger over the hole to keep whats left of the air pressure
    | > (now at just over 30 lbs) in the system until I can get the water shut
    | > off (lesson learned there - shut it off FIRST)
    | > The water valve is chained and no key in sight. Bell ringing right over
    | > my head but nobody seems to notice. For at least 5 minutes I am
    | > standing there under a ringing bell with my finger blocking the hole. I
    | > figure If the clapper releases I will then have water shooting out of a
    | > 1/4 inch hole with a lot more pressure than the air currently is.
    | > Finally someone notices me and I send them looking for the key to the
    | > chain holding the butterfly valve open.
    | > No key can be found and it takes several more minutes before bolt
    | > cutters can be found to cut the chain and shut off the water.
    | > The sprinkler guys show up later and replace the switch. The fella I
    | > spoke with said he has never seen one do that before, but theyt have
    | > recently started using plastic fittings to connect the tamper boxes to
    | > the pipes. (Plastic pipe, 3/4 od and 1/4 id)
    | > We tapped out both knockouts BEFORE mounting the box this time....
    | >
    | > Question: Anyone got a better way of getting rid of those knockouts? I
    | > thought of a 7/8 hole saw next time but not sure how well that may work
    | > since they tend to get grabby and either twist off the box or slam my
    | > drill (and hand) into something delicate or energized.
    | >
    | > I would rather not go through this again....
    | >
    | > BTW, I later found the key in the spinkler repair parts box next to the
    | > wet risers on the other side of the building (which is the first place I
    | > told them to look)
    |
    |
     
  4. JoeRaisin

    JoeRaisin Guest

    I like the ice pick idea. That would put less pressure on it. Once
    they get started they go pretty easy (not like those dual size knockouts
     
  5. Bill

    Bill Guest

    I once did not know that a water flow valve also was wired to trip the main
    power to a building. (This was something new at the time.) So I tested the
    water flow for the alarm and off goes the building power! Building manager
    was not pleased....

    Then another time I forgot a direct wire fire system in a high-rise was also
    wired to bring all the elevators to the ground floor and *leave* them there
    until the direct wire was reset. The testing I was doing left all the
    elevators down. About 15 minutes after I started my testing, an angry
    building manager and several building maintenance guys stormed through the
    sub-basement door. Said; "Do you know you have all the elevators down on the
    first floor?" I said; "Oops, sorry!" - Then I quickly bypassed the elevator
    trip with a jumper and attempted to hide in the corner....
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-