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[2] GENERAL DESCRIPTION

Smoke introduced into this air duct system will be distributed throughout the 
entire building. Smoke detectors designed for use in air duct systems are used 
to sense the presence of smoke in the duct. 

Model D365PL Air Duct Smoke Detector uses photoelectric technology for the 
detection of smoke. This detection method, when combined with an efficient 
housing design, samples air passing through the duct and allows detection of 
a developing hazardous condition. When sufficient smoke is sensed, an alarm 
signal is initiated at the fire control panel monitoring the detector, and appro-
priate action can be taken to shut off fans, blowers, change over air handling 
systems, etc. These actions can facilitate the management of toxic smoke and 
fire gases throughout the areas served by the duct system.

The D365PL incorporates a sensor cover tamper feature that provides a trou-
ble signal at the panel immediately if the cover is removed or improperly in-
stalled. Proper installation of the sensor cover removes the trouble condition.

When programmed with the system control panel, two LEDs on each duct 
smoke detector light to provide local visible indication. 

The D365PL provides a remote alarm output for use with auxiliary devices, 
such as the RA100Z remote LED annunciator, as well as remote test capability 
with the RTS151 or RTS151KEY Remote Test Stations.

[2.1] DETECTOR FEATURE SET 

– Uses plug-in head SD365R (replaceable, see Section 11.1)

– Sampling tubes install from front and rear

– Compatible with existing accessories

– Able to address detector per code switches on sensor head

[3] CONTENTS OF THE DUCT SMOKE DETECTOR KIT 

1. Sensor/power board assembly and covers (with factory-installed sensor 
head)

2. Three #10 sheet metal screws for mounting

3. Drilling template

4. One sampling tube end cap

5. One plastic exhaust tube

NOTE: A sampling tube must be ordered to complete the installation. It must 
be the correct length for the width of the duct where it will be installed. 
See Table 1 on page 2 to determine the inlet tube required for different duct 
widths. 

SPECIFICATIONS

Specifications 
Operating Temperature: 

–4° to 158°F (–20° to 70°C)

 

32° to 120°F (0° to 49°C) with module installed in the D365PL

Storage Temperature: 

–22° to 158°F (–30° to 70°C)

Humidity: 

0% to 93% Relative Humidity Non-condensing

Air Velocity: 

100 to 4000 ft./min. (0.5 to 20.3 m/sec.)

Rectangular Footprint Dimensions:  14.38 in L×5 in W×2.5 in D (37 cm L×12.7 cm W×6.36 cm D)
Square Footprint Dimensions: 

7.75 in L×9 in W×2.5 in D (19.7 cm L×22.9 cm W×6.35 cm D)

Weight: 

1.8 pounds; 0.82 kg

Operating Voltage Range: 

15 to 32 VDC

Standby Current: 

200 µA @ 24 VDC (one communication every 5 seconds with LED blink enabled)

Max. Alarm Current (LED on): 

6.2 mA @ 24 VDC 

NOTE: The D365PL comes with the sensor head factory installed, part number SD365R-IV. 

TABLE OF CONTENTS 

PAGE

[1] Limitations of Duct Smoke Detectors ................................................ 1
[2] General Description ......................................................................... 1
[3] Contents of the Duct Smoke Detector Kit .......................................... 1
[4] Detector Installation  ....................................................................... 2
[5] Sampling Tube Installation ............................................................... 2
[6] Measurement Tests .......................................................................... 3
[7] Field Wiring; Installation Guidelines ................................................. 4
[8] Verification of Operation  ................................................................. 4
[9] Cleaning ......................................................................................... 5
[10] Sensor Replacement ....................................................................... 5
[11] Optional Accessories  ..................................................................... 5

BEFORE INSTALLING

Read System Sensor's 

Applications Guide: Duct Smoke Detectors

 (HVAG53), 

which provides detailed information on detector spacing, placement, zoning, 
wiring, and special applications. Copies of this manual are available online 
at www.systemsensor.com. NFPA Standards 72 and 90A should also be refer-
enced for detailed information. 

NOTICE: This manual shall be left with the owner/user of this equipment.

IMPORTANT: This detector must be tested and maintained regularly following 
NFPA 72 requirements. The detector must be tested an maintained regularly 
following NFPA 72 requirements. According to NFPA, the detector should be 
visually inspected semiannually and functionally tested at least once a year. 
This may need to be more frequent depending on the air quality of the duct 
supply air.

[1] LIMITATIONS OF DUCT SMOKE DETECTORS

WARNING

The National Fire Protection Association has established that DUCT DETEC-
TORS MUST NOT BE USED AS A SUBSTITUTE FOR OPEN AREA DETECTOR 
PROTECTION as a means of providing life safety. Nor are they a substitute for 
early warning in a building’s regular fire detection system.
Fire-Lite supports this position and strongly recommends that the user read 
NFPA Standards 90A, 72, and 101. The D365PL Air Duct Smoke Detectors are 
listed per UL 268A.
This device will not operate without electrical power. Fire situations may 
cause an interruption of power. The system safeguards should be discussed 
with your local fire protection specialist. 
This device will not sense smoke unless the ventilation system is operating 
and the cover is installed.
For this detector to function properly, it MUST be installed according to the in-
structions in this manual. Furthermore, the detector MUST be operated within 
ALL electrical and environmental specifications listed in this manual and the 
sensor head installation manual. Failure to comply with these requirements 
may prevent the detector from activating when smoke is present in the air 
duct.

I56-6626-000

INSTALLATION AND MAINTENANCE INSTRUCTIONS

D365PL 

Duct Smoke Detector

One FireLite Place

Northford, CT 06472

Phone: 203.484.7161 

ACCESSORY CURRENT LOADS AT 24 VDC
DEVICE

STANDBY

ALARM

RA100Z

0mA

12mA Max.

RTS151

0mA

12mA Max.

RTS151KEY

12mA

12mA Max.

  

I56-6626-000 

 

 2/26/2019

Summary of Contents for Fire-Lite Alarms D365PL

Page 1: ...rent 200 µA 24 VDC one communication every 5 seconds with LED blink enabled Max Alarm Current LED on 6 2 mA 24 VDC NOTE The D365PL comes with the sensor head factory installed part number SD365R IV TABLE OF CONTENTS PAGE 1 Limitations of Duct Smoke Detectors 1 2 General Description 1 3 Contents of the Duct Smoke Detector Kit 1 4 Detector Installation 2 5 Sampling Tube Installation 2 6 Measurement ...

Page 2: ... A centers and cut two 1 375 inch diameter holes using a 13 8 inch hole saw or punch Drill 156 inch diameter holes using a 5 32 inch drill at target B centers 4 3 2 FOR SQUARE TOP OVER BOTTOM MOUNTING CONFIGURATION Center punch at four target centers two A for sampling tubes and two C for the square configuration mounting tabs as shown on mounting template Drill pilot holes at target A centers and...

Page 3: ...er than necessary to span the duct width Use a 0 193 inch diameter 10 drill and add the appropriate number of holes so that the total number of holes exposed to the air flow in the duct is 10 to 12 Space the additional holes as evenly as possible over the length of the tube CAUTION This procedure should only be used as a temporary fix It is not intended as a permanent substitute for ordering the c...

Page 4: ...ENANCE PROCEDURES Test and maintain duct smoke detectors as recommended in NFPA 72 The tests contained in this manual were devised to assist maintenance personnel in verification of proper detector operation Before conducting these tests notify the proper authorities that the smoke detection system will be temporarily out of service Disable the zone or system under test to prevent unwanted alarms ...

Page 5: ...ING DIAGRAM FOR D365PL TO RA100Z RA100Z RA RA REMOTE ALARM LED OPTION 1 PER UNIT H0570 05 Note Remove jumper when using RA100Z with the intelligent duct smoke detector The RTS151 RTS151KEY Remote Test Station facilitates test of the alarm ca pability of the duct smoke detector These accessories provide the stimulus to initiate an alarm condition at the detector The D365PL duct smoke detector must ...

Page 6: ...television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the d...

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