3
Bosch | 6/04 | 32029E
2.0 Mounting
1.
Before mounting, remove the dust cover from the
detector. The dust cover can be replaced during
construction periods, but it must be removed once
the alarm system is enabled.
The tamper screw is located in the recess
on the top of the dust cover.
2. Mount the base according to its instructions.
3. Mount the detector to the base by turning it
clockwise until it clicks into place. When it is secure,
the alignment line aligns with the tamper screw hole
(refer to Figure 1).
The D285 Series Smoke Detectors are
keyed. Do not force a detector onto its
bases.
3.0 Installation Testing
1.
Check the wiring from the control panel to the last
head on each run for proper polarity and continuity.
a.
Ensure each run terminates with an EOL
resistor as specified by the control panel
manufacturer.
b.
Ensure the four-wire runs terminate with EOL
modules or D293E Bases.
2. Apply power to the system, checking for alarms and
troubles.
a.
Note which detectors are in alarm (if any) and
then shut down the system.
b.
Remove these detectors from their bases and
recheck the bases for proper wiring. If the
problems persist, replace the affected
detectors or swap them with known good
units. This determines if the problem is
caused by the detector or the base.
c.
If a system alarm with no detector alarms is
present, remove all detectors and check the
wiring at each base. Pay close attention to the
wiring of each EOL resistor and EOL
module.
3. When the system is free of alarms, check each
detector to ensure the red LED indicator is flashing
approximately every 3 sec. This verifies the detector
is receiving power and operating properly.
4. Test each detector to ensure it will cause a control
panel alarm. This is the only way to ensure proper
operation. Alarm the detectors by doing one of the
following:
a.
Place a magnet horizontally against the
detector’s side (centered over the “T” marked
on the head) to activate an internal reed
switch, or
b.
Use a UL Listed aerosol smoke detector
tester such as the Home Safeguard Industries’
25S to simulate an alarm. Follow the
instructions with the aerosol smoke detector
tester.
When a detector alarms, the red LED
indicator activates and latches into the ON
position. Clear the alarm before proceeding
to the next detector.
5. Check the overall loading of the alarm loop by
measuring the voltage across each EOL resistor.
This voltage should equal or exceed the minimum
specified by the control panel manufacturer.
D285/D285TH
| Installation Instructions | 2.0 Mounting
Figure 1:
Mounting the Base
1 - Alignment arrow
2 - Base contacts (three sets)
1
2
