Bosch D341P Installation Manual

D285DH

Installation Instructions

EN Photoelectric Duct

Smoke Detector

D285DH | Installation Instructions |1.0 Introduction

FCC Notice

The D285DH Photoelectric Duct Smoke Detector complies with Part 15 of the Federal Communication Commission (FCC) Rules. Operation is subject to the following conditions:

•The detector might not cause harmful interference.

•The detector must accept any interference received, including interference that can cause undesirable operation.

Changes or modifications not expressly approved by Bosch can void the user’s authority to operate the D285DH detector.

1.0Introduction

The D285DH is a UL Listed detector designed for use with commercial fire protective signaling systems and household fire warning systems. Refer to the National Fire Alarm Code (NFPA 72).

When properly installed using the D285 Series Dectectors, tamper protection is provided by the positive power line in/out wiring. This causes the control to initiate a trouble signal when a detector is removed from its base. The master control provides two-wire system supervision. An end-of-line (EOL) resistor, specified by the control manufacturer, provides four-wire supervision.

2.0 Specifications

Table 1: Specifications

Description	Only requires a base. “B” is the UL
	compatibility identifier. Refer to the
	Two-Wire Smoke Detector Compatibility
	Technical Service Note (P/N: 31866) to
	determine the identifier used with the
	D340 Series Duct Housing.
Operating		+32°F to +100°F (0°C to +38°C)
Temperature		0 to 95% relative humidity
		(non-condensing)
Voltage and	Refer to the D340 Duct Detector
Current	Installation Instructions (P/N: 48188) and
	the D341/D342 Duct Detector
	Installation Instructions (P/N: 48196) for
	voltage and current.
Power-up		22 sec maximum
Time
Compatible	Two-wire:
Control	Refer to the Two-Wire Smoke Detector
Panels	Compatibility Technical Service Note
	(P/N: 31866).
	Note: Bosch makes no claim written, oral,
		or implied the D285DH works 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.

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D285DH | Installation Instructions | 3.0 Mounting

3.0Mounting

1.Before mounting, remove the dust cover from the detector.

2.Mount the duct housing according to the manufacturer’s instructions.

3.Mount the detector on the base by turning it clockwise until it clicks into place (Figure 1).

Figure 1: Mounting the Base
			1
		2	2
		R2
	1	+1	3-
			1
		2
1 -	Base contacts (three sets)

2 - Start the detector contacts at these three places and rotate the base clockwise.

3.When the system is free of alarms, check each detector to ensure the red LED head indicator flashes approximately every 4 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 detector in on of the following methods:

a.If the duct housing cover is in position, place a magnet horizontally against the recess in the cover to activate an internal reed switch.

b.With duct housing cover removed, use a UL Listed aerosol smoke detector tester, such as the Home Safeguard Industries’ 25S to simulate an alarm. Follow the aerosol smoke detector tester manufacturer’s instructions.

When a detector alarms, the red LED head indicator activates and latches in the ON position. Clear the alarm before proceeding to the next detector.

5.Check the overall alarm loop loading by measuring the voltage across each EOL resistor. The voltage should equal or exceed the minimum specified by the control panel’s manufacturer.

The D285DH is keyed. Do not force a detector onto its base.

4.0Testing

1.Check the wiring from the control panel to the last head on each run for proper polarity and continuity.

Ensure each run terminates with an EOL resistor as specified by the control panel manufacturer.

2.Apply power to the system. Check for alarms and troubles.

a.Note which detectors are in alarm (if any) and 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.In a system alarm with no detector alarms, remove all detectors and check the wiring at each base. Pay close attention to the wiring of each EOL resistor.

Bosch | 6/04 | 49323C

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