Model 4821/4820 Control/Communicator Installation Manual
1-8 150961
11. In applications requiring more than two modules 4815 to be located in the control panel
snap track, a model 4890 alarm accessory enclosure is required. (See Section 1.1.2.)
12. Do not eliminate the default I/O programming script. Doing so could cause the bell sounds
to be deleted from the system.
Note: The script can be modified to include additional functions, but the default statements must remain intact.
1.4.3.1 Household Burglary Warning System
If you are installing the 4821/4820 in a UL listed residential installation, follow the
requirement below in addition to those listed in Section 1.4.3.
The Audio Shutdown Delay option must be programmed as 4 minutes.
1.4.3.2 Grade A Mercantile
For a Grade A Mercantile listing, follow the requirements below in addition to those listed in
Section 1.4.3.
1. You must program a time schedule for auto testing to occur (programmed in Time
Schedules Menu).
2. The Audio Shutdown Delay option must be programmed to 15 minutes.
3. A listed tamper switch must protect the inside front door of the enclosure. This switch
must be connected to an intrusion input zone of the control unit which is programmed as a
perimeter zone.
4. All unused knockout holes on the cabinet must be plugged using bolts and washers.
(Model 7600 is a kit available from Silent Knight for this purpose.) See Section 4.7 for
installation instructions.
5. Four pan head screws #8x3”, type AB (thread forming tapping screws) must be placed in
the 4821/4820 cabinet cover to increase the panel’s attack resistance.
6. A separately listed Ademco AB-12 Bell in Box must be used with the control unit.
7. The tamper switches of the alarm bell must be connected to a 24-hour zone. No other ini-
tiating devices may be connected to this loop. The outer housing of the bell box must be
grounded. The bell circuit should be installed in accordance with UL requirements.
8. All bell wiring must be run in its own conduit and must be connected to the control unit
using its own knockout hole.
To Next Page
Loading...
Need help?
General
