Advertisement
D7050/D7050TH | Installation Instructions | 8.0 Maintenance
7.2.3
Magnet Test
Ensure the control panel is in the Fire Walk
Test Mode before performing a Magnet
Test. If the control panel is not in this mode,
it sends Fire Reports to the central station.
Refer to your control panel reference guide
for Fire Walk Test information.
Hold a magnet horizontally against the detector for
approximately 10 sec, centering it over the T on the
housing. Observe the LED.
•
If the detector is within the factory marked
calibration range, it goes into alarm and the Alarm
LED flashes at least once per second.
•
If the detector is too sensitive, the LED flashes
rapidly six times (once every half second) and the
detector goes into alarm.
•
If the detector is not sensitive enough, the LED
flashes four times slowly (once every 2 sec) and the
detector goes into alarm.
•
If the detector is not operational, it does not signal
an alarm. Return the detector for repair.
7.2.4
Voltage Measurement Test
1. Plug a D1005 Test Cable (optional) into the
calibration voltage pin.
2. Connect a digital voltmeter to the D1005.
3. Connect the meter's negative terminal to the
D1005's black wire, and connect the meter's
positive terminal to the D1005's red wire. The
D1005's white wire is not used. The voltage
measured by the voltmeter equals half the
sensitivity (in %/ft obscuration) of the D7050.
4. Multiply the voltage by two. The result should be
within the factory marked calibration range printed
on the label on the bottom of the detector.
5. If the detector is outside the factory marked
calibration range, remove and clean it or replace it
as described in Section 7.1 Operational Testing
beginning on page 5.
6. Recheck the calibration voltage measurement. If
the detector is still outside the factory marked
calibration range after cleaning, return it to the
factory for recalibration.
7.2.5
Thermistor Test (D7050TH only)
1. Expose the thermistor to a heat source such as a
hair dryer or shielded heat lamp until the detector
goes into alarm and the Alarm LED latches on. Do
not touch the thermistor directly.
2. Clear each alarm for each test before proceeding to
the next detector.
6
8.0 Maintenance
Notify all concerned parties before and
after completing maintenance on or testing
the fire alarm system.
Clean the detector and base at least once a year using a
vacuum or clean dry compressed air. Pay particular
attention to the screens. In dusty areas or areas of
heavy insect concentration, cleaning might be required
more often.
1. Remove the detector from its base.
2. Clean the base with a clean cloth and common
window cleaner.
3. Remove the detector cover using a thin, flathead
screwdriver to pry the chamber from the cover.
Insert the screwdriver into the cover slots as shown
in Figure 5 and pry up the detector chamber cover.
Figure 5:
Removing the D7050/D7050TH Cover
2
1 - Screwdriver inserted into cover slot
2 - Cover slot (3)
3 - Detector chamber
4 - Cover
Bosch Security Systems, Inc. | 9/06 | 47458E
1
2
3
4
2
Advertisement
