Page 5
Issue 1, March 2005
Heritage Medcall Sentry Emergency Call System
Model 560B Smoke Detector
Installation and Service Instructions
460-560B 0305 ©Heritage MedCall, Inc.
FIGURE 5 SENSITIVITY TESTING
MAINTENANCE
The smoke detectors are designed for easy field
service and maintenance. If a detector drifts beyond
its approved sensitivity range for more than 24 hours,
or fails internal diagnostic tests, the unit automatically
indicates trouble by flashing its LED every second.
This meets field sensitivity testing requirements
without the need for external meters.
NOTE
Connect to a power supply that will not automatically
reset. Since the self-diagnostics only indicate trouble
after 27 hours, if the power supply automatically
resets the self-diagnostic indication will never be
signaled (the smoke detector will still signal alarm
correctly).
In accordance with NFPA 72, smoke detector sensitiv-
ity should be checked within one year after installa-
tion and every alternate year thereafter, in commercial
installations, or every three years in residential sites.
See
Sensitivity Test.
The detector’s replaceable optical block chamber
unsnaps for easy field cleaning and service. Whenever
the status LED indicates cleaning is necessary, follow
these steps:
1. Open the detector cover, unsnap and throw away
the optical block chamber. See Figure 6.
2. Thoroughly blow off the optical base and snap a
new optical block chamber (part #211) back in place.
NOTE
Be sure the new optical block chamber is seated all
the way down.
3. Close the detector cover and verify sensitivity. See
Sensitivity Test
.
FIGURE 6 DETECTOR MAINTENANCE
OPERATION
Smoke detectors are powered, monitored, and
supervised by the apartment host panel. The host
panel is the master call panel for each apartment.
The host panel monitors the detector’s contacts and
will send an alarm to the console when the detector’s
relay is energized greater than 20 seconds. This
delay is built-in to the host panels’ program to provide
a “verification” feature often specified on installations.
Host panels are polled by the console every 3.5
seconds, and the host panel must report the smoke
alarm on two consecutive poll cycles before the
console will announce the smoke condition.
These delays are intentional and will greatly reduce
nuisance alarms; however when testing, a delay of up
to 49 seconds can be realized before the alarm is
announced at the console.
TANDEM OPERATION - MULTIPLE DETECTORS
When more than one smoke detector is installed in
an apartment, they are connected to all sound when
any one detector senses smoke. This connection
method is referred to as “tandem” operation.
