Maintenance And Testing; Fire Alarm Reset; Reference Voltage Adjustment; Cleaning - Bosch D296 Installation Manual

Long-range beam smoke detectors
8

Maintenance and Testing

8.1

Fire alarm reset

Reset the receiver after a fire alarm by removing power from the receiver for at least 1 sec.,
then reapply power.
For additional information, see Power outage, page 27.
8.2

Reference voltage adjustment

Notice!
Clean covers are necessary for proper reference voltage readings. For cleaning procedures,
see Cleaning, page 27.
Check the detector's reference voltage a minimum of once each year. Check the voltage more
often if required by local regulations or AHJs.
To check the reference voltage, connect a VOM to the voltage monitor contacts on the
D344‑RL or D344‑RT, if used. If you do not have a remote indicator connected to the detector,
remove the receiver access door and measure the reference voltage using the supplied test
cable. For cable connection, see Fine-Tune alignment, page 22.
If the voltage is less than 3.8 VDC or greater than 4.2 VDC, remove the access cover and press
the setup button to initiate a reset of the reference voltage. The reset can take 1 min to 2 min.
8.3

Cleaning

Clean the outside of the covers a minimum of once each year. Use a common window cleaner
and a soft, clean cloth. Under normal conditions, there is no trouble alarm if the beam is not
continuously blocked for longer than 18 sec. After cleaning, recheck the reference voltage. If
voltage is less than 3.8 VDC or greater than 4.2 VDC, reset the reference voltage using the
procedure in Reference voltage adjustment, page 27.
8.4

Power outage

When power is removed and reapplied to the receiver, such as in a power outage or alarm
reset, the original reference voltage information is lost.
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8.5

Remote Test

Notice!
A D344‑RT is required for the remote alarm test.
Notice!
Clean covers are necessary for proper reference voltage readings. For cleaning procedures,
see Cleaning, page 27. For aiming procedures, see Preliminary alignment, page 20 and Fine-
Tune alignment, page 22.
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Bosch Security Systems, Inc.
If the cover is on when power is applied, the receiver restarts the process for a new
reference voltage
If the cover is off, reattach it and press the setup button.
With a D344-RT connected to the receiver, use the following procedure to perform a
remote test.
Insert the operating key and turn the switch to the TEST position for a minimum of 5 sec.
Installation manual
Maintenance and Testing | en
2017.03 | 7.0 | F.01U.068.899
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