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SKE-Series Voice Evacuation System Installation/Operation Manual
3.3.10 AC Delay Switch
The SKE-450 has two built-in trouble relays – General Trouble and AC Trouble.
The General trouble relay will energize when any trouble condition is detected. If the only
trouble condition is an AC failure, the relay output can be programmed to delay the indication
by 2 hours by setting the DIP AC Delay Switch 1 to ON. If the AC Delay Switch is in the OFF
position the trouble relay will energize immediately when AC power fails. See Figure 3-1 for
AC Delay Switch location. The AC Delay Switch may be used only when the SKE-450 is
connected to an FACP that uses central station or off premise signaling.
The AC trouble relay will energize when an AC trouble is detected regardless of the settings
of the AC delay switch.
3.4
Mounting the Control Panel
Read the environmental specifications in Section 3.1 before mounting the control panel
cabinet. This will ensure that you select a suitable mounting location.
The panel should be accessible to main drop wiring runs. It should be mounted as close to the
center of the building as possible and located within a secured area, but should be accessible
for testing and service.
Mount the control panel cabinet so it is firmly secured to the wall surface. When mounting on
concrete, especially when moisture is expected, attach a piece of 3/4-inch plywood to the
concrete surface and then attach the cabinet to the plywood. Also mount any other modules to
the plywood.
The cabinet can be surface or flush-mounted. If you will be flush-mounting the cabinet, the
hole for the enclosure should be 14.5" W x 24.75" H x 3-7/16" D (36.8cm W x 62.9cm H x
8.73cm D). Do not flush-mount in a wall designated as a fire break.
3.4.1
Preventing Water Damage
Water damage to the fire system can be caused by moisture entering the cabinet through the
conduits. Conduits that are installed to enter the top of the cabinet are most likely to cause
water problems. Installers should take reasonable precautions to prevent water from entering
the cabinet. Water damage is not covered under warranty.
3-8
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