Bosch | 6/04 | 32029E
2
D285/D285TH
| Installation Instructions |
FCC Notice
The D285 Series Photoelectric Smoke Detectors (D285,
D285TH) comply with Part 15 of the Federal
Communications Commission (FCC) Rules. Operation
is subject to the following two conditions:
1.
These detectors might not cause harmful
interference.
2. These detectors must accept any interference
received, including interference that might cause
undesirable operation.
Changes or modifications not expressly approved by
Bosch can void the user’s authority to operate the D285
Series Smoke Detectors.
1.0 Overview
The D285 Series are UL Listed, open-area,
photoelectric, smoke detectors designed for use with
commercial fire protective signaling systems and
household fire warning systems (refer to the National
Fire Alarm Code [NFPA 72]). These detectors are
available in two-wire and four-wire models, and have an
op135°F (+57°C) fixed-temperature heat sensor.
For commercial and industrial installations, space the
detectors 30 ft (9.2 m) apart as recommended by
NFPA 72.
When properly installed using the D280/D290 Series
Detector Bases, tamper protection is provided by in/out
wiring of the positive power line. This causes the
control to initiate a trouble signal when a detector is
removed from its base. The master control supervises
the two-wire systems. Four-wire system supervision is
provided by an end-of-line (EOL) power supervision
device such as a D275 or a D293E Power Supervision
Base and an EOL resistor (as specified by the control
manufacturer).
Refer to Table 1 for product descriptions.
Table 1: Product Description
D285
Detector only (requires base)
D285TH
Detector with in135°F (+57°C) heat
sensor (requires base)
D285DH
Detector only, for D340 Series Duct Smoke
Detectors
D287
Base only, two-wire
D292
Base only, four-wire
D293A
Base only, four-wire, Form “C” auxiliary relay
D293E
Base only for power supervision, four-wire,
EOL relay, Normally Open auxiliary relay
D293S
Base only, four-wire, with sounder
D275
EOL supervision module for four-wire systems
TP280
Trim Plate 6 in. (16.2 cm) diameter
The letter “A” is the UL compatibility identifier for the
D285 Series. Refer to the Two-Wire Smoke Detector
Compatibility Technical Service Note (P/N: 31866) to
determine the UL compatibility identifier used with the
D287 Base.
Table 2: Specifications
Operating
Temperature
+32° to 100°F (0°C to +38°C )
0 to 95% relative humidity
(non-condensing)
Power Requirements
Standby
Voltage:
Two-wire: 8.5 VDC to 33 VDC
Four-wire: 10 VDC to 30 VDC
Maximum
RMS Ripple:
25% of DC input
Start-up
Current:
120 µA maximum
Standby
Current:
80 µA at 12 VDC
90 µA at 24 VDC
100 µA at 33 VDC
Note: The D293E equals 24 mA at 12 VDC and 24 VDC.
Alarm Current
Two-wire:
Dependent on the control panel that limits
the alarm current to 100 mA maximum.
Four-wire:
D292: 48 mA at 24 VDC and 51 mA at
24 VDC (70 mA maximum at 30 VDC)
D293E: 80 mA at 12 VDC and 24 VDC
(100 mA maximum at 30 VDC)
D293S: Base 48 mA at 12 VDC, sounder
15 mA at 12 VDC, 25 mA at
24 VDC
Power-up
Time:
22 sec maximum
Compatible Control Panels
Two-wire:
Refer to the Two-Wire Smoke Detector
Compatibility Technical Service Note
(P/N: 31866).
Note: Bosch makes no claim (written, oral,
or implied) the D285 Series Smoke
Detectors work with any two-wire control
panels except those specified in the
Two-Wire Smoke Detector Compatibility
Technical Service Note
(P/N: 31866).
Four-wire:
Compatible with all UL Listed four-wire
control panels. Refer to the
manufacturer's installation instructions for
proper EOL resistor selection.
1.0 Overview
