Silentknight SK-5208 Conventional FACP 10-30 Zone User Manual Page 14

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Control Panel Installation 151204
3-4
3.5 Mounting the SK-5208
Read the environmental specifications in section 3.2 on page 1 before mounting the SK-5208 panel.
The SK-5208 cabinet dimensions are:
16" W x 26.4" H x 4" D (40.64 cm W x 67.06 cm H x 10.16 cm D).
The SK-5208 panel should be located within a secured area, where it is accessible to main drop wiring runs and
where it can be easily tested and serviced. End-users responsible for maintaining the panel should be able to hear
alarms and troubles. When selecting a location, keep in mind that the panel itself is the main source of alarm and
trouble annunciation.
When mounting on interior walls, use appropriate screw anchors in plaster. When mounting on concrete,
especially when moisture can accumulate, the enclosure shall be placed or equipped so as to prevent moisture or
water from entering and accumulating within the cabinet, and shall be mounted so there is a least 1/4” space
between the enclosure and the concrete wall surface. A piece of plywood, standoffs, or other equivalent material
can be used to space the cabinet from the concrete surface and then attach the SK-5208 to that spacing surface.
Also mount any other desired components to the 1/4” spacing surface.
DO NOT flush-mount the SK-5208 cabinet in a wall designated as a fire break.
3.5.1 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.
3.6 Current Draw Calculations
3.6.1 Worksheet Requirements
The following steps must be taken when determining SK-5208 current draw and standby battery requirements.
Filling in the Current Draw Worksheet, Table 3-2 (Section 3.6.2)
1. For the SK-5208, the worst case current draw is listed for the panel and panel accessories. Fill in the number
of devices that will be used in the system and compute the current draw requirements for alarm and standby.
Record this information in Table 3-2 at Line A.
2. Add up the current draw for all smoke detectors and record in the table at Line B.
3. Add up all notification appliance loads and record in the table at Line C.
4. For notification appliances and auxiliary devices not mentioned in the manual, refer to the device manual for
the current ratings.
5. Make sure that the total alarm current you calculated, including current for the panel itself, does not exceed
6.0 A. This is the maximum alarm current for the SK-5208 control panel.
If the current is above 6.0 A you will need to use a notification power expander(s) such as the 5495 to dis-
tribute the power loads so that the SK-5208 or the power expanders do not exceed their power rating. Refer
to the current draw worksheets provided with the 5495 manuals so you do not exceed their power require-
ments.
6. Complete the remaining instructions in Table 3-2 for determining battery size requirements.
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