SENTROL Application notes - Alarms BC

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Residential & Commercial Applications
APPLICATION
INISTALLATION
VENTILATING WINDOWS WITH A
WIDE GAP MAGNET
Venting sliding windows and doors using two magnets and one wide gap switch.
It is possible to obtain up to 5" (12.7 cm) ventilation with a 1-1/2" (3.81 cm) gap
between the magnets and switch.
Select a wide gap recessed switch and an additional 3/8" (0.95 cm) diameter by
1-1/2" (3.81 cm) long magnet.
Remove window from frame (see Figure 1, page 93).
Slightly over-drill vertical hole for switch in top of frame, about 5-1/2" (14 cm) from
edge of frame. Coat switch with RTV mounting compound and insert in hole.
Mount magnets on inside of upper window channel toward top of channel with
RTV mounting compound (Figure 1). Locate one magnet at edge of channel, red
end toward edge of window. Locate other magnet with non-red end under switch
— red end pointing away from other magnet.
After RTV sets (about 15 minutes), reinsert window in frame.
Attach ohmmeter to leads and test for proper switch operation. If switch “drops
out” anywhere within ventilation range, move inside magnet (and switch) closer to
outside edge of door or window.
Connect to alarm loop.
Instruct customer on proper use of ventilation feature. If necessary, add a window
stop or mark maximum permissible opening to prevent false alarms.
Note: Sliding windows can also be vented using a surface mounted switch and
magnet. Also, 1275W series switches can be used for this application.
RECOMMENDED
PRODUCTS
1035W, 1145W, RTV 1905
5 1/2”
Switch
Switch
MAGNETIC CONTACTS
Red End
Magnets
Magnets
Figure 1. Recessed Installation
Figure 2. Surface Mount
Installation
3.24