System Sensor 24ATR Manual De Usuario

D200-84-00

I56-1240-02R

2112/24ATR

Photoelectronic Smoke Detector with

Fixed Heat and Integral Temp-3 Sounder

INSTALLATION AND MAINTENANCE INSTRUCTIONS

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

Specifications
Diameter:

5.5 inches (140 mm)

Height (including mounting bracket):

2.05 inches (52 mm)

Weight:

7.5 oz. (210 g)

Operating Temperature Range:

to 100

F (0

to 38

Operating Humidity Range:

10% to 93% Relative Humidity, Noncondensing

Latching Alarm:

Reset by momentary power interruption

Audible Signal:

85 dBA minimum when in alarm or with supply polarity reversed

Heat Sensor:

135

F Fixed Temperature Electronic Thermistor

Electrical Ratings
System Voltage (nominal):

12 or 24 VDC

Minimum:

10 VDC

Maximum:

35 VDC

Maximum Ripple Voltage:

30% of nom. Voltage (peak to peak)

Standby Current:

A maximum

Alarm Current:

49 mA typical, 60 mA max. at 12V
57 mA typical, 65 mA max. at 24V

Reset Voltage:

0.8 VDC minimum

Reset Time:

1.0 second maximum

Start-up Time:

30 seconds maximum (after 60 sec. reset)

EOL Relay:

A77-716B, 12/24 VDC

Alarm Initiation and Auxiliary Relay:

1A @ 30 VAC

Contact Ratings, Resistive Load:

1A @ 30 VDC

Special Considerations:

Due to the built-in temporal pattern, use these detectors only with a non-coded
power supply.

Figure 1. Wiring diagram for the 2112/24ATR detector:

A78-2336-16

Before Installing
Please thoroughly read the System Sensor manual I56-407,
Guide for Proper Use of System Smoke Detectors, which pro-
vides detailed information on detector spacing, placement,
zoning, wiring, and special applications. Copies of this
manual are available at no charge from System Sensor.

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

IMPORTANT: This detector must be tested and maintained
following NFPA 72 requirements. The detector should be
cleaned at least once a year.

IMPORTANT: OBSERVE POLARITY

As with all sounder models, polarity must be observed on the power connections.

OPTIONAL CLASS A WIRING

EOL RESISTOR
SPECIFIED BY
PANEL
MANUFACTURER

EOL POWER
SUPERVISION
RELAY (SHOWN
ENERGIZED)
A77-716 12/24V

POWER

DETECTORS

UL LISTED

COMPATIBLE

CONTROL

PANEL

INITIATING

LOOP

–

A
U
X

+
+
–

A
A

+
+
–

A
A

ALARM
CONTACT

(OPTIONAL)
RELEASING

DEVICE

COMMON

(OPTIONAL)
RELEASING

DEVICE

COMMON

D200-84-00

I56-1240-02R

2001 System Sensor

Three-Year Limited Warranty

System Sensor warrants its enclosed smoke detector to be free from de-
fects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this smoke detector. No agent, representative,
dealer, or employee of the Company has the authority to increase or alter
the obligations or limitations of this Warranty. The Company’s obligation
of this Warranty shall be limited to the repair or replacement of any part of
the smoke detector which is found to be defective in materials or work-
manship under normal use and service during the three year period com-
mencing with the date of manufacture. After phoning System Sensor’s toll
free number 800-SENSOR2 (736-7672) for a Return Authorization number,
send defective units postage prepaid to: System Sensor, Repair Depart-

ment, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please
include a note describing the malfunction and suspected cause of failure.
The Company shall not be obligated to repair or replace units which are
found to be defective because of damage, unreasonable use, modifica-
tions, or alterations occurring after the date of manufacture. In no case
shall the Company be liable for any consequential or incidental damages
for breach of this or any other Warranty, expressed or implied whatsoever,
even if the loss or damage is caused by the Company’s negligence or fault.
Some states do not allow the exclusion or limitation of incidental or conse-
quential damages, so the above limitation or exclusion may not apply to
you. This Warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.

A78-2565-04

Figure 5. Removal of cover and screen for cleaning:

3. Remove screen assembly, pulling straight out (please

see Figure 5).

4. Remove the sensing chamber cover.
5. Clean the sensing chamber by vacuuming or blowing

out dust and particles.

6. Replace the sensing chamber cover, aligning the arrow

on the cover top with the arrow on the printed circuit
board.

7. Replace the screen by placing the screen assembly over

the sensing chamber cover and twisting until it snaps
into place.

8. Replace the housing by aligning the three triangular

slots on the base with their counterparts on the hous-
ing. Gently press the housing until it locks in place.
Check to make sure that the thermistors are in the up-
right position.

9. Reinstall the detector.
10. Notify the proper authorities that the system is back in

operation.

REMOVABLE
HOUSING

REMOVABLE
SCREEN

SENSING
CHAMBER
COVER

BASE

SENSING
CHAMBER

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Please refer to insert for the Limitations of Fire Alarm Systems