SENTROL Application notes - Alarms BC

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Commercial Applications
PROTECTING ROOF HATCHES
APPLICATION
INSTALLATION
RECOMMENDED
PRODUCTS
Entry via a roof hatch can be thwarted by using Sentrol surface mount switches.
The switch used will depend upon the mounting method required by the space
available and the connection into the alarm circuit.
In hatch protection, it is important to mount both switch and magnet so they will
not intrude into open hatch space where they can catch on clothing and restrict
entry or egress.
Attach the selected switch on the hatch frame opposite the hatch hinges. Do this
while keeping in mind the position of the magnet, and recognizing the need to
keep gap distance between switch and magnet within specified tolerance. When
installed, switch and magnet must be parallel for best operation.
If roof hatch and/or frame is steel, gap distance is usually halved, so allowance
must be made for this. Or, use Sentrol wide gap switches. Mount both switch and
magnet with the Sentrol name reading in the same direction (switch is polarity
sensitive).
After installation, check for proper operation and circuit continuity by opening and
closing the hatch.
1032, 1045T, 1082, 1085 or 1085T, 1032W, 1045TW, 1082W, 1085W, 3011;
Spacers — 1914T for 1045T switch, or 1906T for 1082 switch.
Spacer
Magnet
Switch
Placement of switch
and magnet with
roof hatch closed
MAGNETIC CONTACTS
Sentrol 3011 with plastic
mounting bracket
(optional protection
means)
3.68