270145 R5.0 Signature Series Detector Application Bulletin

Signature Series Detector Application Bulletin

P/N 270145 REV 5.0 ISS 25AUG11

Copyright 2011 UTC Fire & Security. All rights reserved.

Trademarks and patents

Signature Series is a trademark of UTC Fire & Security.

Other trade names used in this document may be trademarks or registered trademarks of the manufacturers or vendors of the respective products.

Manufacturer Edwards, A Division of UTC Fire & Security Americas Corporation, Inc. 8985 Town Center Parkway, Bradenton, FL 34202, USA

Contact information For contact information see our Web site: www.utcfireandsecurity.com.

Signature Series Detector Application Bulletin i

Content

Important information iii Limitation of liability iii FCC warning iii

Related documentation iv

Overview of Signature Series heat, smoke, and carbon monoxide detectors 1

Spacing and location 4 Heat detector spacing 4 Smoke detector spacing 13 CO detector locations 17 Combination and multisensor detector spacing 19 Under-floor installation 20 Stratification and spacing compensation 20 Smoke detector high air movement 22

Heat detector applications 23 Intelligent fixed-temperature heat detector 23 Intelligent rate-of-rise heat detector 24

Smoke detector applications 25 Intelligent ionization smoke detector 25 Intelligent photoelectric smoke detector 25 Intelligent 3D multisensor smoke detector 26 Intelligent 4D multisensor smoke detector 26 Avoidance of false alarms 27

Air duct smoke detector applications 28 Controlling smoke spread 28 Duct detector mounting plate (SIGA-DMP) 29

CO detector applications 32 CO information 33 Installing CO detectors 36

Door release service 38

Sensitivity readings 39 Recording detector sensitivity and available compensation 40

ii Signature Series Detector Application Bulletin

Testing and routine smoke, heat, and CO detector maintenance procedures 41

Initial installation testing 41 Routine maintenance 42 Preventative maintenance and test schedule 43 SIGA2 sensor function test procedures 45 Detector cleaning procedures 46 CO maintenance reports 48 SIGA2 replacement procedures 50

Signature Series Detector Application Bulletin iii

Important information

Limitation of liability The content of this manual is proprietary in nature and is intended solely for distribution to authorized persons, companies, distributors or others for the sole purpose of conducting business associated with UTC Fire & Security. The distribution of information contained within this manual to unauthorized persons shall constitute a violation of any distributor agreements and may result in implementation of legal proceedings.

The Signature Series detectors have been designed to meet the requirements of the following standards:

CAN/CSA-6.19-01

CAN/ULC-S527

CAN/ULC-S529-09

CAN/ULC-S530-M91

ICES-003

NFPA 72

NFPA 720

UL 268

UL 268A

UL 521

UL 864

UL 2034

UL 2075

Installation in accordance with this manual, applicable codes, and the instructions of the authority having jurisdiction is mandatory. UTC Fire & Security shall not under any circumstances be liable for any incidental or consequential damages arising from loss of property or other damages or losses owing to the failure of UTC Fire & Security products beyond the cost of repair or replacement of any defective products. UTC Fire & Security reserves the right to make product improvements and change product specifications at any time.

While every precaution has been taken during the preparation of this manual to ensure the accuracy of its contents, UTC Fire & Security assumes no responsibility for errors or omissions.

FCC warning This equipment can generate and radiate radio frequency energy. If this equipment is not installed in accordance with this manual, it may cause interference to radio communications. This equipment was tested and found to comply within the limits for Class A computing devices pursuant to Subpart B of Part 15 of the FCC Rules. These rules provide reasonable protection against such interference when this equipment is operated in a commercial environment. If the operation of this equipment causes interference, the user must correct the interference and incur the expense.

iv Signature Series Detector Application Bulletin

Related documentation National Fire Protection Association (NFPA)

1 Batterymarch Park Quincy, MA 02168-7471

NFPA 70 National Electric Code

NFPA 72 National Fire Alarm and Signaling Code

NFPA 720 Installation of Carbon Monoxide (CO) Detection and Warning Equipment

Underwriters Laboratories, Inc. (UL) 333 Pfingsten Road Northbrook, IL 60062-2096

UL 38 Manually Actuated Signaling Boxes

UL 217 Single and Multiple Station Smoke Alarms

UL 228 Door Closers/Holders for Fire Protective Signaling Systems

UL 268 Smoke Detectors for Fire Protective Signaling Systems

UL 268A Smoke Detectors for Duct Applications

UL 346 Waterflow Indicators for Fire Protective Signaling Systems

UL 464 Audible Signaling Appliances

UL 521 Heat Detectors for Fire Protective Signaling Systems

UL 864 Control Units and Accessories for Fire Alarm Systems

UL 1481 Power Supplies for Fire Protective Signaling Systems

UL 1638 Visual Signaling Appliances - Private Mode Emergency and General Utility Signaling

UL 1971 Signaling Devices for the Hearing Impaired

UL 2075 Gas and Vapor Detectors and Sensors

Underwriters Laboratories of Canada (ULC) 7 Underwriters Rd Toronto Canada M1R 3B4

CAN/ULC S-524 Installation of Fire Alarm Systems

CAN/ULC S-527 Control Units for Fire Alarm Systems

CAN/ULC S-529-09 Smoke Detectors for Fire Alarm Systems

CAN/ULC-S530-M91 Heat Actuated Fire Detectors for Fire Alarm Systems

CAN/ULC S-536 Inspection and Testing of Fire Alarm Systems

CAN/ULC S-537 Verification of Fire Alarm Systems

CAN/CSA-6.19 Residential Carbon Monoxide Alarming Devices

Signature Series Detector Application Bulletin 1

Overview of Signature Series heat, smoke, and carbon monoxide detectors The Signature Series family of detectors includes a variety of detection technologies available in various combinations to meet the needs of the fire protection community. The detectors are constructed of a high-impact polymer. Each detector features a base-locking tab that functions in exposed mounting bases or duct housings. Table 1 below lists the available detector models. Table 2 on page 2 lists the available detector bases and accessories.

Table 1: SIGA and SIGA2 [1] smoke, heat and carbon monoxide sensor (CO) detectors

Model Description

SIGA-IS Ionization Smoke Detector

SIGA-PS, SIGA2-PS Photoelectric Smoke Detector

SIGA-PHS, SIGA2-PHS, SIGA2-PHSB [2] [3]

Combination Photoelectric Smoke and 135F (57C) Fixed-Temperature Heat Detector

SIGA-IPHS SIGA-IPHSB [3]

Combination Ionization, Photoelectric, and Thermal Boost Type Smoke Detector. An above-ambient temperature change of 65F (57C) in a one-hour period produces an alarm

SIGA-HFS, SIGA2-HFS 135F (57C) Fixed-Temperature Heat Detector

SIGA-HRS, SIGA2-HRS Combination 15F (8C) per minute Rate-of-Rise, and 135F (57C) Fixed-Temperature Heat Detector

SIGA2-COS SIGA2-COS-CA [4]

CO (Carbon Monoxide) Detector

SIGA2-HCOS SIGA2-HCOS-CA [4]

Combination 15F (8C) per minute Rate-of-Rise, 135F (57C) Fixed-Temperature Heat Detector with CO sensor

SIGA2-PCOS SIGA2-PCOS-CA [4]

Photoelectric Smoke Detector with CO sensor

SIGA2-PHCOS SIGA2-PHCOS-CA [4]

Combination Photoelectric Smoke and 135F (57C) Fixed-Temperature Heat Detector with CO sensor

[1] The SIGA2 detectors are backwards compatible with the SIGA detectors, providing equivalent functionality.

[2] The difference between the SIGA-PHS device and the SIGA2-PHS(B) is that the SIGA2-PHS(B) can report the heat and photo elements as separate event types (independent - latched, or independent - nonlatched), or together (combo alarm - latched). To set the type of reporting, refer to the SDU Help version 11.0 or later.

[3] The B models are black.

[4] Model numbers with the suffix -CA are approved by ULC.

2 Signature Series Detector Application Bulletin

Table 2: Signature Series accessories and bases

Model Description SIGA SIGA2

SIGA-AB4G Audible (Sounder) Base X X

SIGA-AB4GT CO Compatible Sounder Base X [1]

SIGA-TCDR Temporal Pattern Generator X [1]

SIGA-SB Detector Mounting Base X X

SIGA-SB4 Detector Mounting Base with SIGA-TS4 Trim Skirt X X

SIGA-IB Detector Mounting Base with Fault Isolator X X

SIGA-IB4 Detector Mounting Base with Fault Isolator includes SIGA-TS4 Trim Skirt

X X

SIGA-RB Detector Mounting Base with Relay X X

SIGA-RB4 Detector Mounting Base with Relay with SIGA-TS4 Trim Skirt

X X

2-CORPL CO Replacement Module X

2-SPRC1 Smoke Chamber Replacement Module for smoke detectors with CO sensor

X

2-SPRC2 Smoke Chamber Replacement Module for smoke detectors without CO sensor

X

SIGA-LED Remote Alarm LED X X

SIGA-TS4 Trim Skirt, supplied with 4-inch bases X X

SIGA-TSB Trim skirt, black, for use with black detectors X

SIGA-TS Trim Skirt, optional for with other than 4 inch bases X X

SIGA-DG Detector Guard X

SIGA-DGSB Detector Guard Surface Mount Accessory X

SIGA-DGMF Mounting Flange, optional X

SIGA-DH Duct Smoke Detector Housing X

SIGA-DMP Duct Mounting Plate X X

[1] For use with CO detectors

Signature Series smoke, heat, and carbon monoxide sensor (CO) detectors are intelligent analog addressable devices that contain their own microprocessors that allow them to make alarm decisions based on the information collected by their sensors. Depending on the detector, decisions may be based on the information gathered by up to three independent sensing elements.

Addressing: All Signature Series detectors feature electronic addressing. No addressing switches are used.


LEDs: Signature Series detectors use LEDs to indicate the detectors condition. SIGA detectors have two LEDs, while SIGA2 detectors have one LED. In normal condition, a flashing green LED indicates that the control panel is performing background supervision and a flashing red LED indicates an alarm condition. In the event of a loss of communication in some systems, the detector operates in a stand-alone mode. As long as it maintains circuit continuity to the control panel, the detector indicates the stand-alone mode by the steady operation of both LEDs in SIGA detectors or the single LED in SIGA2 detectors.

Self-diagnostics: Signature Series detectors can perform and store a comprehensive range of self-diagnostic measurements. The detector stores information regarding a detectors hours of operation, last maintenance date, sensitivity values, and number of recorded alarms and troubles.

Sensitivity: The alarm sensitivity is the minimum obscuration level at which the detector initiates an alarm condition. On some Signature Series detectors, the alarm sensitivity level may be changed to any of five sensitivity settings using the control panel programming. See Table 17 on page 39 for SIGA and Table 18 on page 40 for SIGA2.

Suitability: To select which detector is best suited for a particular type of fire, see the following.

Intelligent fixed-temperature heat detectors; see Table 7 on page 24.

Intelligent rate-of-rise temperature heat detectors; see Table 8 on page 24.

Intelligent ionization smoke detectors; see Table 9 on page 25.

Intelligent photoelectric smoke detectors; see Table 10 on page 26.

Intelligent 3D multisensor smoke detectors; see Table 11 on page 26.

Intelligent 4D multisensor smoke detectors; see Table 12 on page 27

Verification: All Signature Series smoke detectors offer alarm verification for validating an alarm condition before the control panel processes it. When enabled, the alarm verification tries to reset a detector that has initiated an alarm condition. If the detector cannot be reset or if it returns to its alarm condition within the required time window, the alarm is considered valid and the control panel processes it.


Spacing and location This section discusses the parameters for the spacing and location of heat detectors, smoke detectors, and CO detectors. To better understand the requirements, use the following definitions:

Beams are solid structures that project down from the ceiling surface more than 4 in. (100 mm) and are spaced at intervals of more than 36 in. (910 mm), center-to-center.

Ceiling is the upper surface of a space, regardless of the height. Consider a ceiling:

Smooth, if it is uninterrupted by continuous projections, such as solid joists, beams, or ducts that extend more than 4 in. (100 mm) below the ceiling surface.

Level, if it has a slope of less than or equal to 1 in 8.

Sloping, if it has a slope of more than 1 in 8.

Sloping peaked-type, if the ceiling slopes in two directions from the highest point. Consider curved or domed ceilings as a peaked ceiling, with the slope figured as the slope of the chord from highest to lowest point. See Sloping peaked-typed ceilings on page 8.

Sloping shed-type, if the high point is at one side with the slope extending toward the opposite side. See Sloping shed-typed ceilings on page 9.

Ceiling Height is the height from the floor to the ceiling of a room or space.

Design spacing spacing required for a particular installation.

Listed spacing the spacing for which a heat detector is rated.

Partitions walls extending from the floor toward the ceiling. If they are within 15% of the ceiling, consider the space separated by the partitions as separate rooms.

Solid joists are solid structures that project down from the ceiling surface more than 4 in. (100 mm) and are spaced at intervals of 36 in. (910 mm) or less, center-to-center. Consider solid joists equivalent to beams for smoke detector spacing guidelines.

Heat detector spacing This section discusses detector spacing for spot-type heat detectors that use either fixed temperature, rate-of-rise, or a combination of the two to detect a fire. For a list of Signature Series heat detectors, see Table 3 on page 5.


Table 3: Signature Series heat detectors

Description SIGA SIGA2

Fixed temperature and heat rate-of-rise [1] SIGA-HRS SIGA2-HRS SIGA2-HCOS SIGA2-HCOS-CA

Fixed temperature SIGA-HFS SIGA2-HFS

[1] For combination heat and rate-of-rise or photo-thermal detectors, see Table 5 on page 19.

Do not install heat detectors in areas with an ambient temperature above 100.4 F (38C). When determining detector placement, consider ceiling height, construction, and ventilation as these affect a detectors performance.

A heat detectors listed spacing rating is based on detector installation on a flat smooth ceiling that is 10 ft. (3 m) high. The spot-type listed spacing equates detector operation with the opening of a standard sprinkler head within 2 minutes (10 seconds) located 10 ft. (3 m) from the same fire. Detector spacing is shown in Figure 1 below.

Figure 1: Listed spacing for heat detectors

S

S/2

S/2 S/2

S/2 S/2.7S .7S

S

S

S

S S

1

1. Heat detector

S = Listed spacing between detectors: SIGA detectors S = 70 ft. (21.3 m) SIGA2 detectors S = 50 ft. (15.2 m)

Note: Spacing is dependant on the ceiling height


Detector coverage is typically represented as a square because most structures have flat sidewalls. Actual detector coverage is a circle whose radius is 0.7 times the listed spacing. The listed spacing for SIGA heat detectors is S = 70 ft. (21.3 m) and for SIGA2 S = 50 ft. (15.2 m).

Figure 2 below shows that the square areas of coverage, A, B, and C, are all within the detector's circle of coverage.

Figure 2: Detectors circle of coverage

A

B

C

Since all of the area within the detectors circle of coverage is suitable for detecting a fire, the shape and dimensions of the detector coverage square in Figure 3 on page 7 may be modified. Note that, although the coverage square is now a rectangle, the coverage area remains within the overall detector circle of coverage.


Figure 3: Heat detector spacing, rectangular areas

25 ft. x 34 ft. = 850 ft. (7.6 m x 10.4 m = 79 m)20 ft. x 37 ft. = 740 ft. (6.1 m x 11.3 m = 69 m)15 ft. x 39 ft. = 585 ft. (4.6 m x 11.9 m = 54 m)10 ft. x 41 ft. = 410 ft. (3.1 m x 12.5 m = 38 m)

30 ft. x 30 ft. = 900 ft. (9.1 m x 9.1 m = 84 m)1

1. Based on 70 ft. listed spacing

Note: Smoke detectors are not listed for spacing.

Figure 4: Heat detector placement near ceiling/wall joints

2

3

4

5

4 in. (100 mm) min.

12 in. (300 mm) max.

4 in. (10mm) min.

4 in.

1

1. Smooth ceiling, place detector 4 in. (100 mm) from wall 2. Never in this area: 4 in. (100 mm) from top of wall or corner 3. Top of detector is acceptable in shaded area: 4 to 12 in. (100 to 300 mm) from ceiling 4. Wall 5. Floor


When installed on the ceiling, locate the heat detectors a minimum of 4 in. (100 mm) from the wall. When installed on walls, locate the detector between 4 in. (100 mm) and 12 in. (300 mm) from the ceiling, as shown Figure 4 on page 7.

Ceiling height and construction Make spacing adjustments when installing heat detectors on other than flat smooth ceilings or at ceiling heights 10 ft. (3 m) to 30 ft. (9.1 m) high. Table 4 below lists the reduction in spacing required when mounting detectors on ceilings higher than 10 ft. (3 m). This reduced spacing yields the equivalent response of detectors located on a 10 ft. (3 m) ceiling. Evaluate ceilings above 30 feet with consideration to the best type of detection and the placement and spacing.

Table 4: Heat detector ceiling height reduction percentages

Ceiling height Percent of listed spacing

SIGA-HFS, SIGA-HRS

SIGA2-HFS, SIGA2-HRS, SIGA2-HCOS, SIGA2-HCOS-CA

0 to 10 ft. (0 to 3.0 m) 100 70 ft. (21.3 m) 50 ft. (15.3 m)

10 to 12 ft. (3 to 3.7 m) 91 63 ft. (19.2 m) 45.5 ft. (13.9 m)

12 to 14 ft. (3.7 to 4.3 m) 84 58 ft. (17.7 m) 42 ft. (12.8 m)

14 to 16 ft. (4.3 to 4.9 m) 77 53 ft. (16.2 m) 38.5 ft. (11.7 m)

16 to 18 ft. (4.9 to 5.5 m) 71 49 ft. (14.9 m) 35.5ft. (10.8 m)

18 to 20 ft. (5.5 to 6.0 m) 64 44 ft. (13.4 m) 32 ft. (9.8 m)

20 to 22 ft. (6.0 to 6.7 m) 58 40 ft. (12.2 m) 29 ft. (8.8 m)

22 to 24 ft. (6.7 to 7.3 m) 52 36 ft. (11.0 m) 26 ft. (7.9 m)

24 to 26 ft. (7.3 to 7.9 m) 46 32 ft. (9.8 m) 23 ft. (7.0 m)

26 to 28 ft. (7.9 to 8.5 m) 40 28 ft. (8.5 m) 20 ft. (6.0 m)

28 to 30 ft. (8.5 to 9.1 m) 34 23 ft. (7.0 m) 17 ft. (5.2 m)

Note: Ceiling heights higher than 30 ft. (9.1 m) exceed the limits of the testing for the requirement of the code.

Sloping peaked-typed ceilings In rooms with sloping peaked-typed ceilings, (see Figure 5 on page 9) place the first row of detectors within 36 in. (910 mm) horizontally of the peak, but not closer than 4 in. (100 mm) vertically to the peak. Space additional detectors, if required, based upon the horizontal projection of the ceiling and ceiling construction. For a ceiling slope of:

Less than 30 degrees, space the detectors using the height at the peak.

Greater than 30 degrees, space the detectors, other than those located in the peak, based on the average slope height or the height of the peak.


Figure 5: Detector spacing - sloping peaked-type ceiling

336 in. (910 mm)

4 in.(100 mm)

36 in. (910 mm)

1/2 S SS

1

2

1. Do not mount detector in this area 2. Mount detector anywhere in this area 3. Heat or smoke detector


Sloping shed-typed ceilings

In rooms with sloped ceilings (see Figure 6 on page 10) having a slope greater than 1 ft. in 8 ft. (1 m in 8 m), place the first row of detectors within 36 in. (910 mm) of the high end of the ceiling, but not closer than 4 in. (100 mm) from the adjoining wall or ceiling. Space additional detectors, if required, based upon the horizontal projection of the ceiling and ceiling construction. If the slope is:

Less than 7.2 (1 in 8), treat the ceiling as a level ceiling

Less than 30, adjust the horizontal spacing according to the height of the peak

Greater than 30, adjust the horizontal spacing according to the average sloped ceiling height or to the height of the peak

This spacing modification for sloped shed-typed ceilings is identical for spot-type heat detectors and smoke detectors.


Figure 6: Detector spacing - sloping shed-typed ceiling

3

1

2

2 36 in.(910 mm)

max.

S S S S S

4 in.(100 mm)

4 in.(100 mm)

1. Heat or smoke detector 2. Do not mount detector in this area 3. Mount detector anywhere in this area


Solid joists

When spacing heat detectors at right angles to the solid joists, do not exceed 50% of the listed spacing and mount the detectors at the bottom of the joists.

Figure 7: Heat detector spacing - solid joists

W

D

1

2

3 > 4 in. (100 mm)

D. Depth W. Spacing between joist

1. Ceiling 2. Detector

3. Joist


Figure 8: Reduced spacing for solid joists construction

1/2 S

1/2 S

1/2 S 1/2 S1/4 S 1/4 S

S

1

2


1. Heat detector 2. Joist

Exposed beams Exposed beams may impede the flow of fixed or rate-of-rise heat detectors. Beams are defined as solid structures extending 4 in. (100 mm) or more down from the ceiling. Beam spacing depends on the depth of projection from the ceiling and the center-to-center spacing between the beams. If the beams project:

Less than or equal to 4 in. (100 mm) below the ceiling, mount the detector on the ceiling with normal ceiling spacing. See Figure 9, item 1.

More than 4 in. (100 mm) below the ceiling, mount the detector on the ceiling. Do not exceed 66% of the listed spacing at right angles to the beam direction. Treat the spacing in the direction parallel to the beams separately. See Figure 9, item 2.

Less than 12 in. (300 mm) in depth and are spaced less than 96 in. (2.44 m) on center, mount the detectors on the bottom of the beams. See Figure 9, item 3.

Greater than 18 in. (460 mm) below the ceiling and are more than 96 in. (2.44m) on center, treat each bay created by the beams as a separate area. See Figure 9, item 4.

For additional details, see NFPA 72.


Figure 9: Heat detector spacing - beam construction

W

W

W

D

D

D

D

5

5

5

5

1

6

6

6

66

2

3

4

7

7

7

7

8

8

8

8

> 4 in. (100 mm)

> 12 in. (300 mm)

> 18 in. (460 mm)

4 in. (100 mm)

< 96 in. (2.44 m)

> 96 in. (2.44 m)

D = Depth of beam W = Beam spacing 1. D = 4 in. (100 mm) 2. D = > 4 in. (100 mm)

3. D = > 12 in (300 mm, W = < 96 in. (2.4 m)

4. D = > 18 in. (460 mm), W = > 96 in. (2.4 m)

5. Ceiling Section 6. Heat detector 7. Solid beam 8. Side view


Smoke detector spacing The spot-type smoke detector spacing recommendation of 30 ft. (9.1 m) 5% or 18 in. (460 mm) is based upon the detector installation on a smooth ceiling that is 10 ft. (3 m) high. Detector coverage is typically represented as a square, because most structures have flat sidewalls. Like spot-type heat detectors, smoke detector coverage is a circle whose radius is 0.7 times the listed spacing. Since all of the area within the detectors circle of coverage is suitable for detecting smoke from fire, the shape and dimensions of the detector coverage square may be modified. Note that, although the coverage square is a rectangle, the coverage area is within the overall detector circle coverage. (See Figure 3 on page 7.)

Note: Unlike heat detectors, smoke detectors are not given a listed spacing. It is recommended that smoke detectors be installed on S = 30 ft. (9.1 m) 5% or 18 in. (460 mm) installed on x centers, on smooth ceilings. NFPA 72, National Fire Alarm and Signaling Code contains additional information regarding spacing adjustments.

Ceilings and walls Locate smoke detectors on the ceiling or, if on a sidewall, between the ceiling and 12 in. (300 mm) down from the ceiling to the top of the detector.

Figure 10: Smoke detector placement near ceiling/wall joints

2

3

4

12 in. (300 mm) max.

1

1. Smooth ceiling 2. Top of detector is acceptable in this area

3. Wall 4. Floor


For a smooth ceiling, for every point on the ceiling, locate the detector within a horizontal measurement no greater than 0.7 times the selected spacing.

Beams and solid joists For smoke detector spacing, solid joists are considered equivalent to beams.

For ceilings with a beam or solid joist depth less than 10 percent of the ceiling height (0.1 H) mount the detectors on the bottom of beams.

For ceilings with a beam or solid joist depth equal to or greater than 10 percent of the ceiling height (0.1 H) and a beam spacing equal to or greater than 40 percent of the ceiling height (0.4 H), locate the detectors on the ceiling in each beam pocket.

For ceilings with a beam depth equal to or greater than 10 percent of the ceiling height (0.1 H) and a beam spacing less than 40 percent of the ceiling height (0.4 H), locate the detectors either on the bottom of the beams or on the ceiling at smooth ceiling spacing in the direction parallel to the beams and at one-half smooth ceiling spacing in the direction perpendicular to the beams.


Figure 11: Smoke detector spacing - beam construction

0.4 H

5

2

7

4

0.4 H

5

6

6

3

7

4

5

1

66

7

4

H = Ceiling Heights

1 < 1.0 H 2. . 0.1 H and . 0.4 H 3. 0.1 H and . 0.4 H 4. Side view

5. Ceiling Section 6. Heat detector 7. Solid beam

Sloping ceilings with beams

For sloping ceilings with beams running parallel up the slope:

Locate the smoke detectors on the ceiling within the beam pockets.

The ceiling height is the average height over slope.

To determine the detector spacing, measure along the horizontal projection of the ceiling.

Smooth ceiling spacing is permitted within beam pocket(s) parallel to the beams.

For beam depths less than or equal to 10 percent of the ceiling height (0.1 H), locate the detectors with smooth ceiling spacing perpendicular to the beams.


For beam depths greater than 10 percent of the ceiling height (0.1 H) and beam spacing greater than or equal to 40 percent of the ceiling height (0.4 H), locate the detectors in each beam pocket.

For beam depths greater than 10 percent of the ceiling height (0.1 H) and beam spacing less than 40 percent of the ceiling height (0.4 H), smoke detectors are not required in every beam pocket but must be spaced not greater than 50 percent of smooth ceiling spacing.

Sloping ceilings with intersecting beams For sloped ceilings with beam pockets formed by intersecting beams, position the detectors on the bottom of perpendicular beams and align them with the center of the pocket. See Figure 12.

Figure 12: Spacing for sloping ceilings with beam pockets formed by intersecting beams

D/H 0.1 D/H 0.1

1

2 3

Smoke detector

D = Beam depth; H = average ceiling height over slope 1. Upslope 2. Place the detectors with not more than three beams between detectors and not exceeding

the smooth ceiling spacing 3. Place the detectors with not more than two beams between detectors and not exceeding the

50% of the smooth ceiling spacing

Sloping peaked-typed ceilings

In rooms with sloping peaked-type ceilings, place the first row of detectors within 3 ft. (1 m) (horizontally) of the ceiling peak. Space additional detectors, if required, based upon the horizontal projection of the ceiling and ceiling construction. This modification of spacing for smoke detectors on sloped ceilings is identical to that used for spot-type heat detectors. See Figure 5 on page 9.


In rooms with sloping shed-typed ceilings having a slope:

Less than a 1 ft. in 8 ft. (1 m in 8 m) rise, treat as a level ceiling.

Greater than a 1 ft. in 8 ft. (1 m in 8 m) rise, place the first row of detectors within 36 in. (910 mm) of the high end of the ceiling. Space additional detectors, if required, based upon the horizontal projection of the ceiling and ceiling construction.

Less than 30, adjust the horizontal spacing according to the height of the peak.

Greater than or equal to 30, adjust the horizontal spacing according to the average sloped ceiling height.

This spacing modification for smoke detectors on sloped ceilings is identical to that used for spot-type heat detectors. See Figure 6 on page 10.

CO detector locations Selecting a suitable location is critical to the operation of CO detectors. Install the SIGA2 CO detector in accordance with NFPA 720 Standard for the Installation of Carbon Monoxide (CO) Detection and Warning Equipment, UL 2075 Standard for Gas and Vapor Detectors and Sensors, CAN/CSA-6.19-01 Residential Carbon Monoxide Alarming Devices, CSA C22.1 Canadian Electrical Code, Part 1 and applicable codes. Base the detector location and spacing on an engineering evaluation that considers potential sources and migration of carbon monoxide. In this evaluation, consider the HVAC system, which can provide CO migration.

Place the wall-mounted detectors at least 5 ft. (1.5 m) up from the floor. For ceiling mounted applications, place the detector at least 1 ft. (0.3 m) from any wall. For combination detectors, follow the spacing requirements for each sensor. See Combination and multisensor detector spacing on page 19.

The recommended CO detector locations are:

In every bedroom, within 10 ft. (3 m) of sleeping areas, including areas such as hotel rooms and dorm rooms.

In residential dwellings, locate detectors in every bedroom, within 10 ft. (3 m) of sleeping areas, and on each level. At a minimum, place one detector outside the sleeping areas. See Figure 13 on page 18.

Centrally located and on every habitable level of the building including basements and excluding attics and crawl spaces; and in every HVAC zone based on an engineering evaluation considering potential sources and migration of carbon monoxide.

In any area required by local building codes, legislation, or authority having jurisdiction.


On the ceiling in the same room as permanently installed fuel-burning appliances.

In a suitable environment per the detector specifications.

On a firm, permanent surface.

Do not install the CO detector:

Within 5 ft. (1.5 m) of any cooking appliance

Within 10 ft. (3 m) of a fuel-burning appliance

Near air conditioners, heating registers, or any other ventilation source that may interfere with CO gas entering the detector

Where furniture or draperies may obstruct the airflow

In a recessed area

Note: To reduce the possibility of nuisance alarms, ventilate accommodation spaces when using cleaning supplies or similar contaminants.

Figure 13: Recommended CO detector locations

CO detector locations

WARNING: The CO detector by itself does not provide smoke or fire protection. For life safety and property protection from fire, use the detector with ionization detectors, photoelectric smoke detectors, or both.


Combination and multisensor detector spacing A combination detector is a device that responds to more than one fire phenomenon or employs more than one operating principle to sense one of these phenomena. Typical examples are a combination heat detector and smoke detector or a combination rate-of-rise and fixed-temperature heat detector.

The Signature Series has combination and multisensor detectors. For a list of these, see Table 5 below.

Table 5: Signature Series combination and multisensor detectors

Description SIGA SIGA2

Combination 15F (8C) per minute rate-of-rise, and 135F (57C) fixed-temperature heat detector

SIGA-HRS SIGA2-HRS

Combination 15F (8C) per minute rate-of-rise, and 135F (57C) fixed-temperature heat detector and CO sensor

SIGA2-HCOS, SIGA2-HCOS-CA

Combination photoelectric smoke and fixed-temperature heat

SIGA-PHS SIGA2-PHS SIGA2-PHSB

Combination ionization, photoelectric smoke, and heat

SIGA-IPHS SIGA-IPHSB

Combination photoelectric smoke, fixed-temperature heat, and CO sensors

SIGA2-PHCOS SIGA2-PHCOS-CA

For spacing information about the thermal portion of the detector, see Heat detector spacing on page 4.

Note: If using combination detectors incorporating both fixed temperature and rate-of-rise heat detection principles, space the detector based on the rate-of-rise.

For spacing information about the smoke portion of the detector, see Smoke detector spacing on page 13.

Note: If using combination smoke and heat detection principles, space the detector based on the smoke portion. For example, space combination smoke and heat detectors with a maximum spacing of 30 ft. (9.1 m) 5% or 18 in. (460 mm).


Under-floor installation When spot-type smoke detectors are installed under raised floors, they are subjected to high air velocities and dust levels. Install the detectors with the base up or the base vertical (never down) as shown in Figure 14 below. This minimizes the effects of dirt, dust, and mechanical interference from cabling.

Figure 14: Permissible smoke detector under floor mounting

12

2 2

3 34

5 5

5

5 6

A C

A. Junction box secured to structure B. Junction box secured to floor

support C. Junction box secured to angle

iron or channel support

1. Raised floor panel 2. Smoke detector 3. Junction box

4. Steel angle or channel support

5. EMT or FMC conduit 6. Clamp

Stratification and spacing compensation Stratification occurs when the upward movement of smoke and gases ceases due to the loss of buoyancy of heated smoke. Stratified air within a room may impede smoke reaching the detector. To improve detection system response in situations where stratification exists, install additional detectors at elevations below ceiling level as shown in Figure 15 on page 21. For additional information, refer to NFPA 72, Annex B.


Figure 15: Smoke detector compensation for stratification

36 in. (910 mm) min.

1

2

3

4

5

1. Ceiling section 2. Smoke detector, at ceiling 3. Smoke detector, below ceiling

4. Side view 5. Plan view


Smoke detector high air movement The use of spot-type smoke detectors in areas of high air movement (greater than 300ft./min [1.5m/sec]) requires a suitable reduction in detector spacing to maintain detector performance. Use Table 6 below to determine the reduce detector spacing in these areas. This table is not valid for use under floor or in ceiling plenum areas, however, the principle of reduced spacing in these high-velocity areas applies.

Table 6: High airflow area detector spacing reduction

Minutes per air change

Number of air changes per hour

Coverage per detector

1 60 125 ft.2 (12 m2)

2 30 250 ft.2 (23 m2)

3 20 375 ft.2 (35 m2)

4 15 500 ft.2 (46 m2)

5 12 625 ft.2 (58 m2)

6 10 750 ft.2 (70 m2)

7 8.6 875 ft.2 (81 m2)

8 7.5 900 ft.2 (84 m2)

9 6.7 900 ft.2 (84 m2)

10 6 900 ft.2 (84 m2)

Effects of heating, ventilating, and air conditioning (HVAC) systems Because airflow is critical to the transportation of smoke to the detector location, never locate smoke detectors closer than 36 in. (910 mm) to an HVAC supply diffuser or return air opening. Higher velocity intake and return grills may require additional clearance.

Do not rely on the operation of the HVAC system when spacing smoke detectors.


Heat detector applications

WARNINGS

Heat detectors do not:

Operate without electrical power. As fires frequently cause power interruption, discuss further safeguards with the local fire protection specialist.

Sense fires in areas where heat cannot reach the detector. Heat from fires in walls, roofs, or on the opposite side of closed doors may not reach the detector.

Provide, by themselves, life safety protection. Use heat detectors with a combination ionization detectors, photoelectric smoke detectors, or both.

Detect oxygen levels, smoke, toxic gases, or flames. Use these devices as part of a broad-based life safety program which includes a variety of information sources pertaining to heat and smoke levels, extinguishment systems, visual and audible devices, and other safety measures.

According to independent studies, use heat detectors only for property protection. Never rely on heat detectors as the sole means of fire protection.

Heat detectors sense change in air temperature and initiate alarm conditions based on a fixed-temperature point, rate of temperature rise, or amount of temperature rise above ambient condition. The Signature Series heat detectors are spot-type detectors. Spot-type heat detectors have a detecting element or elements that respond to temperature conditions at a single point or in a small area. The fixed-temperature detectors respond when the detecting element becomes heated to a predetermine level. The rate-of-rise detectors respond when the temperature rises at a rate that exceeds a predetermined value.

Intelligent fixed-temperature heat detector Table 7 on page 24 lists six standard types of fire and the suitability of the intelligent fixed-temperature heat detectors for each. The applicable intelligent fixed-temperature heat detectors are SIGA-HFS, SIGA2-HFS, and the fixed-heat portion of SIGA2-HCOS, SIGA2-HCOS-CA, SIGA2-PHCOS, SIGA2-PHCOS-CA, SIGA-PHS, SIGA2-PHS, and SIGA2-PHSB. These detectors contain a 135F (57C) fixed-temperature heat sensor that is best suitable for detecting fast, flaming fires such as open wood and liquid fires without smoke.


Table 7: Intelligent fixed-temperature heat detector applications

Type of Fire Suitability of detectors

Open wood Optimal

Wood pyrolysis Unsuitable

Smoldering cotton Unsuitable

PU foam Suitable

N-heptane Very Suitable

Liquid fire without smoke Optimal

Note: The SIGA-IPHS(B) is not a listed substitute for a heat detector.

Intelligent rate-of-rise heat detector Table 8 below lists six standard types of fire and the suitability of the intelligent rate-of-rise heat detectors for each. The intelligent rate-of-rise temperature heat detectors are SIGA-HRS, SIGA2-HRS, SIGA2-HCOS, and SIGA2-HCOS-CA. These detectors contain a 15F (8.5C) per minute rate-of-rise heat sensor, which is best suitable for detecting fast, flaming fires such as open wood and liquid fires without smoke.

Table 8: Intelligent rate-of-rise temperature heat detector applications

Type of fire Suitability of detectors

Open wood Optimal

Wood pyrolysis Unsuitable

Smoldering cotton Unsuitable

PU foam Suitable

n-heptane Very Suitable

Liquid fire without smoke Optimal


Smoke detector applications Regardless of the principle of operation (e.g., ionization, photoelectric), smoke detectors sense the presence of smoke particles. In order for a smoke detector to sense these particles, smoke must travel from the point of origin to the detector. When evaluating a particular building or location for detector layout, determine likely fire locations and paths of smoke travel from each of these fire locations. Wherever practical, conduct actual field tests. The most desired location for smoke detectors is the common points of intersection of smoke travel from fire locations throughout the building. Ceiling height, construction, and ventilation play significant roles in smoke detector performance.

Intelligent ionization smoke detector Table 9 below lists six standard types of fire and the suitability of the intelligent ionization smoke detectors for each. The ionization smoke detector has a wide range of fire sensing capabilities and is best suited for detecting fast, flaming fires such as open wood and N-heptane fires.

Table 9: Intelligent ionization smoke detector applications

Type of fire Suitability of SIGA-IS

Open wood Optimal

Wood pyrolysis Suitable

Smoldering cotton Very suitable

PU foam Very suitable

N-heptane Optimal

Liquid fire without smoke Unsuitable

Intelligent photoelectric smoke detector Table 10 on page 26 lists six standard types of fire and the suitability of the intelligent photoelectric smoke detectors for each. The intelligent photoelectric smoke detectors are SIGA-PS, SIGA2-PS, SIGA PHS, SIGA2-PHS, SIGA2-PHSB, and the photoelectric section of SIGA2-PCOS, SIGA2-PCOS-CA, SIGA2-PHCOS, and SIGA2-PHCOS-CA. Photoelectric smoke detectors have a wide range of fire sensing capabilities and are best suited for detecting slow, smoldering fires such as wood pyrolysis and smoldering cotton.


Table 10: Intelligent photoelectric smoke detector applications

Type of Fire Suitability of detectors

Open wood Unsuitable

Wood pyrolysis Optimal

Smoldering cotton Optimal


N-heptane Very suitable

Liquid fire without smoke Unsuitable

Intelligent 3D multisensor smoke detector Table 11 below lists six standard types of fire and the suitability of the intelligent 3D multisensor smoke detectors for each. The intelligent 3D multisensor smoke detectors are SIGA-PHS, SIGA2-PHS(B) and the multisensor portion of SIGA2-PHCOS and SIGA2-PHCOS-CA. The multisensor device has a wider range of fire sensing capabilities than single sensor detectors. The multisensor detector is best suited for detecting slow, smoldering fires such as wood pyrolysis, smoldering cotton, and n-heptane. The supplemental information provided by the integral fixed-temperature heat sensor also makes the multisensor detector very suitable for detecting the other types of fire.

Table 11: Intelligent 3D multisensor smoke detector applications

Type of fire Suitability of detectors

Open wood Very suitable




N-heptane Optimal

Liquid Fire without smoke Very suitable

Intelligent 4D multisensor smoke detector Table 12 on page 27 lists six standard types of fire and the suitability of the Intelligent 4D Multisensor Smoke Detector for each. The Intelligent 4D Multisensor Smoke Detector is a multi-sensor device has a wider range of fire-sensing capabilities than single sensor detectors. The Intelligent 4D Multisensor Smoke Detector contains ionization and photoelectric smoke sensors as well as a 65F (35C) increase above ambient temperature heat sensor. This combination of sensors in a single detector allows the device to detect slow,


smoldering fires such as wood pyrolysis and smoldering cotton and fast, flaming fires such as open wood and n-Heptane fires.

Table 12: Intelligent 4D multisensor smoke detector applications

Type of fire Suitability of SIGA-IPHS(B)

Open wood Optimal



PU foam Optimal

N-heptane Optimal

Liquid fire without smoke Very suitable

Avoidance of false alarms Smoke detectors are sensitive to a number of environmental factors (other than smoke), which may inadvertently activate the detectors. Careful consideration of the environment in which a detector is installed minimizes unwanted detector activation (nuisance alarms). When locating smoke detectors, consider common sources of false alarms:

Cooking equipment Welding, cutting, and industrial processes Chemical fumes Dust Engine exhaust Vibration Excessive airflow Lightning and power outages Lighting fixture and other electrical equipment that may emit noise/EMF Radio frequency transmissions Steam and moisture

Note: Signature Series smoke detectors provide automatic environmental compensation, which reduces the occurrence of false alarms by allowing sensing elements to adapt to long-term environmental changes, caused by dirt, smoke, temperature, and humidity.


Air duct smoke detector applications

Controlling smoke spread Smoke detectors placed in air ducts or plenums are not substitutes for open area smoke detectors. Do not place heat or CO detectors in air ducts.

Install spot-type smoke detectors listed for the required air velocity up to 12 in. (30 cm) in front of or behind the opening in return ducts. When the duct height exceeds 36 in. (91 cm), space the detectors per Table 13 below.

Rigidly mount the detector within the air duct. Permanently mark all duct detector locations and ensure that they are accessible for cleaning and maintenance. See Figure 17 on page 29.

Table 13: Location of spot-type detectors in return air duct openings

Duct Size [1] Detector placement

Up to 36 in. (910 mm) One detector centered in the duct opening

Up to 72 in. (1.83 m) Two detectors located at the 1/4 points of the duct opening

Over 72 in. (1.83 m) One additional detector for each full 24 in. (610 mm) of duct opening

[1] Duct size is the greater of the width (horizontal dimension) or depth (vertical dimension)

Figure 16: Smoke detector spacing in return ducts

36 in. (910 mm) max.

36 in.(910 mm)

max

36 in.(910 mm)

max.

72 in. (1.83 m) max.

W/2

18 in.(460 mm)

max.

18 in.(460 mm)

max.

W/4 W/4

D/2 D/2

D/2 D/2

72 in. (1.83 m) 24 in. (610 mm)

.

W Width D Depth

Smoke detector One detector is required for each full 24 in. (610 mm) of additional opening width


Note: Keep the detectors spaced equally apart.

Figure 17: Smoke detector location in return ducts

1

2

3

4

1. Electrical box 2. Detector

3. Access panel door 4. Air duct

Duct detector mounting plate (SIGA-DMP) The SIGA-DMP Duct Detector Mounting Plate is a 7 in. (178 mm) square mounting plate with a 4 in. (100 mm) square electrical box used to directly mount a Signature Series smoke detector inside an air duct. The SIGA-DMP includes screws for mounting the detector base and a rubber gasket that forms an airtight seal between the mounting plate and the air duct wall. See Figure 18 below.

Note: Do not use with CO or heat detectors.

Figure 18: SIGA-DMP

Install the SIGA-DMP in ducts that have a maximum width and maximum height of 36 in. (910 mm).


Compatible smoke detectors include the SIGA-PS, SIGA2-PS, SIGA-PHS, SIGA2-PHS, SIGA2-PHSB, SIGA-IPHS, and SIGA-IPHSB. Compatible bases include the SIGA-SB, SIGA-SB(4), SIGA-RB, SIGA-RB(4), SIGA-IB, and SIGA-IB(4), Table 14 below lists compatible smoke detectors and the acceptable air velocity range for each.

Table 14: SIGA-DMP compatible smoke detectors

Model Acceptable air velocity range

SIGA-PS, SIGA-PHS 0 - 5,000 ft./min (0 to 25.39 m/s)

SIGA2-PS, SIGA2-PHS, SIGA2-PHSB

0 - 4,000 ft./min (0 to 20.32 m/s)

SIGA-IPHS, SIGA-IPHSB 0 - 500 ft./min (0 to 2.54 m/s)

There are three possible installation configurations for the SIGA-DMP. Refer to Figure 19 on page 31.

Option 1: Installing the SIGA-DMP to a remote LED

When mounting the SIGA-DMP in an easily accessible, clearly visible location on the air duct, use a remote LED (model SIGA-LED) to mount the SIGA-DMP and to indicate Normal and Alarm conditions of the smoke detector.

Option 2: Installing the SIGA-DMP to a remote relay module When mounting the SIGA-DMP on a control relay module (model SIGA-CR), use a remote LED (model SIGA-LED) to provide indication of normal and alarm conditions of the smoke detector.

Option 3: Mounting the SIGA-DMP to a blank cover When using the SIGA-LED at a remote location to provide indication of normal and alarm conditions of the smoke detector, install a blank cover plate on the SIGA-DMP.


Figure 19: SIGA-DMP installation options

1

2

3

4

5

6

7

1. Option 1: Remote LED, SIGA-LED 2. Option 2: Control Relay Module, SIGA-CR,

use the SIGA-LED to indicate detector status

3. Option 3: Blank cover plate

4. Air duct wall thickness: 0.75 in. (19 mm) max.

5. Compatible detector 6. Compatible base 7. Duct detector mounting plate, SIGA-DMP

If there are multiple doorways, space the detectors as listed below:

If the distance between doorways exceeds 24 in. (610 mm), treat each doorway separately.

Treat each group of three or more doorway openings as separate.

Treat each group of doorway openings with an overall width greater than 20 ft. (6.1 m) as separate.

For additional information and detector location requirement for single and double doors, see NFPA 72.


CO detector applications The Signature Series Carbon Monoxide (CO) detector is an intelligent analog device that uses a CO sensor to detect carbon monoxide. The detector then analyzes the sensor data to determine when to initiate a life safety CO alarm. For model numbers and descriptions, see Table 1 on page 1.

The CO detectors have the following features.

Carbon monoxide sensor. The CO sensor is designed to detect carbon monoxide gas from any source of combustion. It is not intended to detect fire, smoke, or any other gas.

The detector analyzes the air every eight seconds and sends a signal to the FACP when the concentration of CO and the time of CO exposure produces above 5% COHb (the concentration of CO in the human body, carboxyhemoglobin), as set forth in UL 2075 and CAN/CSA-6.19-01.

LED indicator. The LED indicator displays the following states:

Normal: green LED indicator flashes; take no action.

Alarm/active: red LED indicator flashes; evacuate the area.

Stand-alone alarm: red LED indicator glows continuously; evacuate the area.

Sensor end-of-life indicator. The detector signals a trouble condition on the control panel when the CO sensor module reaches end of life. For instructions on how to field replace, see CO sensor module on page 51.

Self-diagnostic. The CO detector performs tests every eight seconds to check if the sensor is operating correctly and to verify that the calibration data is valid.

The CO detector automatically resets to normal operation when the carbon monoxide dissipates.

Regulatory compliance: The CO detector complies with UL 2075 and CAN/CSA-6.19-01. CAN/CSA-6.19-01 requires that the system generate a three-pulse temporal code (TC3) for fire alarms and a four-pulse temporal code (TC4) for CO alarms. In addition, ULC requires that the CO zone type setting is monitor, latching or non-latching.


CO information

WARNINGS

This product is intended for use in ordinary indoor locations of family living units. It is not designed to comply with commercial or industrial standards such as the Occupational Safety and Health Administration (OSHA).

The detector only indicates the presence of CO gas at the detector. Carbon monoxide gas may be present in other areas.

Failure to properly install, test, and maintain a CO detector may cause it to fail, potentially resulting in loss of life.

Installation of a CO detector does not substitute for proper installation, use, and maintenance of fossil fuel-burning appliances, including appropriate ventilation and exhaust systems.

To reduce the risk of CO poisoning, test the detector operation when not in use for 10 days or more.

This detector does not operate without electrical power. As fires frequently cause power interruption, discuss further safeguards with the authority having jurisdiction (AHJ).

Do not paint the detector.

Notes

Connect this detector only to a UL Listed control panel capable of differentiating between alarm signals (fire, burglary, CO, etc.) and providing distinct identification for each.

To reduce the likelihood of nuisance alarms, ventilate accommodation spaces when using household cleaning supplies or similar contaminants. If a detector has been exposed to such contaminants, test it promptly afterwards.

This CO detector is calibrated at the factory. The CO sensitivity is set to conform to UL 2075 and CAN/CSA-6.19-01 requirements and cannot be changed by the user. For the requirement settings, see Table 15 below.

Table 15: Sensitivity based on UL 2075 and CAN/CSA-6.19-01 alarm requirements

CO concentration Alarm time

30 3 PPM Must not alarm

70 5 PPM 60 to 240 Minutes




Symptoms of CO poisoning The following symptoms related to CO poisoning should be discussed with all occupants of the protected site.

Mild exposure: Slight headache, nausea, vomiting, fatigue (often described as "flu-like" symptoms).

Medium exposure: Severe throbbing headache, drowsiness, confusion, fast heart rate.

Extreme exposure: Unconsciousness, convulsions, cardiorespiratory failure, death.

Many cases of reported CO poisoning indicate that while victims are aware they are not well, they become so disoriented that they are unable to save themselves by either exiting the building or calling for assistance. Young children and pets may be the first affected.

CO sources

The CO sensor in this detector is designed to detect carbon monoxide gas from any source of combustion. It is not intended to detect fire, smoke, or any other gas. Potential CO sources include fuel-fired appliances (e.g., space heater, furnace, water heater, range, oven, clothes dryer); other sources of combustion (e.g., kerosene-burning stove or heater, or gas log fireplace); or internal combustion engines.

In addition, excessive exhaust spillage or reverse venting of fuel-burning appliances can produce dangerous transient levels of CO. This can be caused by external conditions:

Wind direction, velocity, or a combination of both, including high gusts of wind or insufficient draft in vent pipes

Temperature inversions that can trap exhaust gases near the ground

Negative pressure differential resulting from the use of exhaust fans

Simultaneous operation of several fuel-burning appliances competing for limited internal air

Vent pipe connections vibrating loose from dryers, furnaces, or water heaters

Obstructions in vent pipes or unconventional vent pipe designs which can amplify the above situations

Poorly designed or maintained chimneys and/or vents

Extended operation of unvented fossil fuel-burning devices (range, oven, fireplace, and etc.)

Car idling in an open or closed attached garage, or near a home


General limitations of CO detectors This detector is designed to protect individuals from the acute affects of CO exposure. It will not fully safeguard individuals with specific medical conditions. People with special medical problems should consider using specialized detection devices with less than 30 ppm (parts per million) alarming capabilities. If in doubt, consult a medical practitioner.

If the unit is in trouble or at the end of its life, it may not sense CO and cannot be relied upon to monitor CO levels. For this reason, replace the CO module every six years from the date of manufacture or when the control panel indicates a sensor end-of-life condition, whichever comes first.

A detector installed outside a bedroom may not awaken a sleeper. Normal noise due to stereos, television, etc. may also prevent the detector from being heard if distance or closed or partly closed doors muffle the sounder. This unit is not designed for the hearing impaired.

CO detectors are not a substitute for life safety: Though these detectors will warn against increasing CO levels, we do not warrant or imply in any way that they will protect lives from CO poisoning. They should only be considered as an integral part of a comprehensive safety program.

CO precautions

No detection device can protect life in all situations. Therefore, take the following safeguards to avoid potentially dangerous situations:

Regularly inspect all fuel-burning appliances for proper operation and ventilation.

Clean all chimneys, flues, and vents annually. Keep them free of debris and check for blockage, corrosion, rust, and cracks.

Have all heating equipment checked yearly by a qualified technician.

Ensure that exhaust and ventilation fans and fireplaces do not interfere with the air supply to a furnace.


Installing CO detectors

WARNINGS

Failure to properly install, test, and maintain a CO detector may cause it to fail, potentially resulting in loss of life.

Use only with UL/ULC Listed control panels capable of differentiating between alarm signals (fire, burglary, CO, etc.) and providing distinct identification for each.

The CO detector does not operate without electrical power. As fires frequently cause power interruption, discuss further safeguards with the local fire protection specialist.

The CO detector by itself does not provide smoke or fire protection; use with ionization detectors, photoelectric smoke detectors, or both.

The CO detector does not detect oxygen levels, smoke or flames. Use this device as part of a broad-based life safety program which includes a variety of information sources pertaining to heat and smoke levels, extinguishment systems, visual and audible devices, and other safety measures.

Notes

Each CO detector is calibrated at the factory. The CO sensitivity is set to conform to UL and ULC requirements and cannot be changed by the user. For the UL and ULC requirement settings, see Table 18 on page 40.

To ensure proper operation, store the detector within the recommended ranges. Allow the detector to stabilize to room temperature before applying power.

Install per UL 2075 Standard for Gas and Vapor Detectors and Sensors, NFPA 720 Standard for the Installation of Carbon Monoxide (CO) Detection and Warning Equipment, and applicable codes and the local authority having jurisdiction.

In Canada, install CO detectors per the National Building Code of Canada 6.2.4 and 9.32.3.9, the CAN/CSA 6.19.01 Residential Carbon Monoxide Alarming Devices, CSA C22.1 Canadian Electrical Code, Part 1, applicable codes and the local authority having jurisdiction.

Do not install the CO detectors until after final construction cleanup (unless otherwise specified by the AHJ).

The dust cover (supplied) must remain on the detector during installation. Temporarily remove it for commissioning and replace it until just prior to placing it into service. The dust cover is not a substitute for removing the detector during new construction or heavy remodeling.


In a typical installation, place the junction boxes in the ceiling, and run the wires from the panel to the junction box in conduit. Run the wires from the junction box to a compatible detector base per the installation instructions for the base.

All wiring must conform to the requirements of the NFPA 70 National Electrical Code, CSA C22.1 Canadian Electrical Code, Part 1, the applicable local codes, and the authority having jurisdiction.

Note: Where required, to permanently disable the tamper-resist mechanism prior to placing the detector in difficult to reach locations, break and remove the plastic lever arm from the base.


Door release service When spot-type smoke detectors are installed to detect smoke coming from either side of a doorway in order to release the doors, install smoke detectors according to the figure below.

Table 16: Smoke detector locations for door release service

D = Depth of wall section above door

Ceiling or wall mounted Detectors required

0 to 24 in. (0-610 mm) on both sides of doorway

D

5 ft. max.(1.52 m)

Min. = 12 in.

D = 0 24 in. (0 610 mm)D1 = 4.0 12.0 in. (100 mm 300 mm)

D1

One ceiling-mounted detector on each side or one wall-mounted detector on each side

Over 24 in. (610 mm) on one side only

5 ft. (

Min. = D

max.1.52 m max.)

D1D

D1

24 in. ( 610 mm)D > >24 in. ( 610 mm)

D2 = 4.0 in. 12.0 in. (100 mm 300 mm)

D2

One ceiling-mounted detector on higher side or one wall -mounted detector on each side

Over 24 in. (610 mm) on both sides

DD

5 ft.

Min=D

max.1.52 m max.

5 ft. max.1.52 m

Min=Dmax.

D1

D > >24 in. ( 610 mm)D1 = 4.0 in. 12.0 in. (100 mm 300 mm)

Two detectors required

Over 60 in. (1.52 m) May require additional detectors as indicated by engineering evaluation

= Possible detector location


Sensitivity readings The control system to which these detectors are connected is capable of interrogating each detector to determine its sensitivity. The system can provide a hardcopy of the results of sensitivity testing if a printer is installed. Table 17 below lists the acceptable smoke and heat ranges of sensitivity for SIGA smoke and heat detectors. Table 17 below lists the acceptable smoke, heat, and CO ranges of sensitivity for SIGA2 detectors.

Table 17: Acceptable sensitivity ranges for SIGA detectors as reported by the control panel

Model Detection elements Factory-assigned sensitivity

Adjustable alarm point setting (%obsc./ft.) [1]

SIGA-IS Ionization 1.6% obsc./ft. 0.7, 1.0, 1.2, 1.4, 1.6

SIGA-PS Photoelectric 3.5% obsc./ft. 1.0, 2.0, 2.5, 3.0, 3.5

SIGA-PHS Photoelectric Fixed temperature

3.5% obsc./ft. 135F (57C)

1.0, 2.0, 2.5, 3.0, 3.5

SIGA-IPHS, SIGA-IPHSB

Ionization, photoelectric, Above ambient temperature

3.5% obsc./ft. 65F (35C)

1.0, 2.0, 2.5, 3.0, 3.5

SIGA-HFS Fixed-temperature 135F (57C) N/A

SIGA-HRS Rate-of-rise or Fixed-temperature

15F/minute or 135F (57C)

N/A

[1] Settings listed in the following sequence: most, more, medium, less, least.

Notes

The prealarm points available depend on the panel with which these are used. The prealarm actual % per foot obscuration depends on the settings for the sensitivity level and the prealarm level.

On EST3 and QuickStart panels:

SIGA-IS ranges from 50% to 95% in 5% increments

SIGA-PS ranges from 5% to 95% in 5% increments

Example: On an EST3 control panel, a SIGA-PS set to medium sensitivity and to 60% prealarm, the actual obscuration level required to activate the prealarm is 1.5% per foot. This is 60% of the alarm obscuration, which for medium sensitivity is 2.5%.

On EST2, IRC-3 and FCC panels: No support for prealarm levels

On iO64/500 panels: SIGA-IS and SIGA-PS ranges from 50% to 80% in 5% increments or 90%. (50, 55, 60, 65, 70, 75, 80, and 90 are values that are available)


Table 18: Acceptable sensitivity ranges for SIGA2 detectors as reported by the control panel

Model Detection elements Factory-assigned sensitivity

Adjustable alarm point setting (%obsc./ft.) [1]

SIGA2-COS SIGA2-COS-CA

CO 70 ppm 60 to 240 minutes

N/A

SIGA2-HCOS SIGA2-HCOS -CA

Rate-of-rise or Fixed temperature CO

15F/minute or 135F (57C) 70 ppm 60 to 240 minutes

N/A

SIGA2-HFS Fixed temperature 135F (57C) N/A

SIGA2-HRS Rate-of-rise or Fixed temperature

15F/minute or 135F (57C)

N/A

SIGA2-PCOS SIGA2-PCOS-CA

Photoelectric CO

3.5% obsc./ft. 70 ppm 60 to 240 minutes

1.0, 2.0, 2.5, 3.0, 3.5

SIGA2-PHCOS SIGA2-PHCOS-CA

Photoelectric Fixed temperature CO

3.5% obsc./ft. 135F (57C) 70 ppm 60 to 240 minutes

1.0, 2.0, 2.5, 3.0, 3.5

SIGA2-PHS(B) Photoelectric Fixed temperature

3.5% obsc./ft. 135F (57C)

1.0, 2.0, 2.5, 3.0, 3.5

SIGA2-PS Photoelectric 3.5% obsc./ft. 1.0, 2.0, 2.5, 3.0, 3.5

[1] Settings listed in the following sequence: most, more, medium, less, least.

SIGA2-PCOS, SIGA2-PCOS-CA, SIGA2-PHCOS, and SIGA2-PHCOS-CA settings range from 50% to 95% in 5% increments

SIGA2-PS, SIGA2-PHS, and SIGA2-PHSB settings range from 5% to 95% in 5% increments

Recording detector sensitivity and available compensation Signature Series environmental compensation circuits and the alarm algorithm used in Signature Series detectors guarantee that a detectors sensitivity setting is maintained as long as a detector has compensation headroom. When the detector reaches 80% dirty, the system generates a maintenance alert monitor point indicating the detector needs cleaning in the near future. When the detector reaches 100% dirty, a detector trouble condition is annunciated.

To properly judge the effectiveness of the detector cleaning process, observe the effect cleaning had on the detectors dirtiness level. To do this, see Detector cleaning procedures on page 46.


Testing and routine smoke, heat, and CO detector maintenance procedures To ensure proper operation, plan maintenance in accordance with the requirements of the authority having jurisdiction. Refer to NFPA 72 National Fire Alarm and Signaling Code, CAN/ULC-S536, Standard for the Inspection and Testing of Fire Alarm Systems, and CAN/ULC-S537 Standard for the Verification of Fire Alarm Systems.

Initial installation testing Before testing, notify the proper authorities that the fire alarm system is undergoing maintenance and will be temporarily out of service.

To perform an initial SIGA installation test:

1. Visually inspect each detector and verify it is installed in the correct location. Make sure it will not be adversely affected by factors not apparent on the plans.

2. Remove the detector from its base and verify that the proper detector address, trouble signals, and messages are reported.

3. Activate smoke detectors using a chemical smoke aerosol spray (Smoke Tester by Home Safeguard, Inc. is recommended) or a smoke generator.

4. Activate rate-of-rise heat detectors using a heat gun.

5. Verify that adequate airflow is available for air duct detectors per the installation instructions. Verify that the detector address and message are correct.

6. If wired for Class A operation, verify operation with each data circuit disconnected.

7. Place a ground on the data circuit and verify operation of ground fault detection circuitry.

8. Run a system detector sensitivity report on all detectors and verify that readings fall within acceptable limits.

To perform an initial SIGA2 installation test: 1. Visually inspect each detector and verify it is installed in the correct location.

Make sure it is not be adversely affected by factors not apparent on the plans.

2. Remove the detector from its base and verify that the proper detector address, trouble signals, and messages are reported. Return the detector to the base.


3. If wired for Class A operation, verify that the detector continues to operate first with SLC_IN disconnected, and then with SLC_OUT disconnected. (Refer to the installation sheet for the base.)

4. Place a momentary ground fault on the signaling line circuit (SLC) to verify operation of ground fault detection circuitry.

5. Run a system detector sensitivity report on all detectors and verify that readings fall within acceptable limits.

6. Perform a sensor function test as described in SIGA2 sensor function test procedures on page 45.

Routine maintenance Detectors shall be tested on a routine basis satisfactory with the authority having jurisdiction, typically once every 6 months.

To perform routine SIGA maintenance: 1. Verify detector operation, wiring integrity, and control panel operation

sequences specific to that detector, if any.

2. Activate smoke detectors using a chemical smoke aerosol spray (Smoke Tester by Home Safeguard, Inc. is recommended) or smoke generator.

3. Activate rate-of-rise heat detectors using a heat gun.

4. Run a system detector sensitivity report on all detectors and verify that readings fall within acceptable limits. Clean detectors that are too close to the alarm threshold according to the Detector cleaning procedures on page 46.

To perform routine SIGA2 maintenance:

1. Verify detector operation, wiring integrity, and control panel operation sequences specific to that detector, if any.

2. Perform a sensor function test on each sensor as described in SIGA2 sensor function test procedures on page 45.

3. Run a system detector sensitivity report on all detectors and verify that readings fall within acceptable limits. Clean detectors that are too close to the alarm threshold according to the Detector cleaning procedures on page 46.


Preventative maintenance and test schedule Use Table 19 below and Table 20 on page 44 to determine when to perform testing and preventative maintenance procedures.

Table 19: SIGA recommended preventive maintenance and conventional test schedule

Model Testing interval

Sensor Testing procedure

SIGA-HFS, SIGA-HRS

Semi-annually

Heat 1. Visually inspect the detector. Verify that the green LED is flashing.

2. Put the detector/zone in TEST mode.

3. Hold the heat gun (1200- to 1500-watt commercial hair blow dryer recommended) directed towards the heat entry slots maintaining a 6 in. (152 mm) minimum distance.

Caution: Do not apply excessive heat when using a heat gun. Excessive heat may damage outer cover.

4. Turn the blower on at its highest setting. The detector should alarm within 10 to 15 seconds.

5. Verify that a detector activation indication is on the FACU per the system design.

SIGA-IS SIGA-PS, SIGA-PHS, SIGA-IPHS, SIGA-IPHSB

Annually Smoke 1. Visually inspect the detector. Verify that the green LED is flashing.

2. Put the detector/zone in TEST mode.

3. If a detector function test is required, test the smoke sensor with the Smoke Detector Tester and Model 1490 Adapter/Tube Accessory, manufactured by Home Safeguard, Inc. or SOLO A4 aerosol manufactured by SDi per instructions stated on the can.

4. Verify that a detector activation indication is listed on the printer.

5. Run a detector sensitivity and compensation report.


Table 20: SIGA2 recommended preventive maintenance and conventional test schedule

Model Testing interval Sensor Testing procedure [1]

SIGA2-COS SIGA2-COS-CA SIGA2-HCOS SIGA2-HCOS-CA SIGA2-PCOS SIGA2-PCOS-CA SIGA2-PHCOS SIGA2-PHCOS-CA

Monthly (until January, 2012 when it becomes an annual test)

CO 1. Visually inspect the detector. Verify that the green LED is flashing.

2. Perform a CO sensor function test.

SIGA2-HFS SIGA2-HRS SIGA2-HCOS SIGA2-HCOS-CA SIGA2-PCOS SIGA2-PCOS-CA SIGA2-PHCOS SIGA2-PHCOS-CA

Semi-annually Smoke

Heat

1. Visually inspect the detector. Verify that the green LED is flashing.

2. Perform a smoke sensor function test.

3. Perform a heat sensor function test.


Annually

(Starting January, 2012)

CO 1. Visually inspect the detector. Verify that the green LED is flashing.

2. Perform a CO sensor function test.

SIGA2-PS SIGA2-PHS, SIGA2-PHSB

Annually Smoke

Heat

1. Visually inspect the detector. Verify that the green LED is flashing.

2. Perform a smoke sensor function test.

3. Perform a heat sensor function test


6 years after date of manufacture

CO Replace CO sensor.

[1] Testing procedure as described in SIGA2 sensor function test procedures on page 45


SIGA2 sensor function test procedures Before testing, notify the proper authorities that the fire alarm system is undergoing maintenance and will be temporarily out of service.

Test each sensor in the detector. In the following steps, xxx indicates a variable related only to marketplace.

Caution: Heat damage. Excessive heat may damage the detector outer cover. Do not apply excessive heat when using a hair dryer. When using a Testifire detector tester, you must install a SIGA2 Testifire Adapter Assembly.

Make sure the SIGA2 Testifire Adapter Assembly (model SIGA2-TSTSPACER) is installed in the Testifire detector tester before testing. Refer to the SIGA2 Testifire Adapter Assembly Installation Sheet for further details. Compatible detector testers are Testifire 1000 and Testifire 2000.

To perform a heat sensor function test: 1. If desired, use the fire alarm control panel to put the detector or zone into a

service group for testing. (Refer to the panel technical reference manual for instructions.)

2. Activate the heat sensor using a hair dryer (maintaining a distance of three inches) or using a Testifire detector tester per the manufacturers instructions.

To perform a smoke sensor function test: 1. If desired, use the fire alarm control panel to put the detector or zone into a

service group for testing. (Refer to the panel technical reference manual for instructions.)

2. Activate the smoke sensor using No Climb Products model CHEK02-xxx smoke aerosol spray, a smoke generator, or the Testifire detector tester per the manufacturers instructions.

To perform a CO sensor function test:

1. Use the fire alarm control panel to put the detector into accelerated response mode. (Refer to the panel technical reference manual for instructions.)

2. Activate the CO sensor using SDI LLC model Solo C6-xxx CO aerosol spray without covering the head, or using the Testifire detector tester per manufacturers instructions.

Note: If the CO sensor is programmed as an alarm point, it must comply with the requirements of NFPA 720. To meet ULC requirements, the CO sensor must be programmed as a monitor point


Detector cleaning procedures There are two cleaning procedures:

SIGA detectors require using a conventional vacuum cleaner equipped with the detector cleaning tool from the Signature Series Tool Kit (P/N SIGA-ST). The tool is installed on the end of the suction hose (nominal 1.5 in. or 3.8 cm ID). This creates a high velocity vortex scrubbing action around the detector, removing loose dust and debris which is subsequently drawn into the vacuum.

SIGA2 detectors require opening the detector and cleaning the interior using a vacuum cleaner and a soft brush as instructed below.

Note: In order to avoid false alarms, disable the detector being cleaned before cleaning.

To clean the SIGA detector: 1. Disable the detector to prevent false alarms.

2. Use the conventional vacuum cleaner brush attachment to remove any visible cobwebs etc. from the immediate area of the detector.

3. Connect the detector cleaning tool to the suction hose. See Figure 20 on page 47.

4. Place the detector cleaning tool over the detector head for approximately one minute.

5. After the detector has been cleaned, use the SIGA-PRO Signature Program/Service Tool to change the maintenance date and thereby automatically update the dirtiness level at the control panel.

Without using the SIGA-PRO Signature Program/Service Tool, it is not possible to immediately verify the dirtiness levels after cleaning. In this case, operate the detectors for a minimum of two hours, and then restart the loop controller. If the detectors are cleaned properly, the maintenance indicators return to normal condition.

6. Run the detector sensitivity routine to print a list of detector sensitivity and compensation readings and to verify the effectiveness of the cleaning.


Figure 20: SIGA detector cleaning tool

1

2

3

1. Place detector cleaning tool over detector

2. Detector cleaning tool 3. Connect to vacuum cleaner hose

To clean the SIGA2 detector:

1. Disable the detector or zone to prevent false alarms.

2. Use a conventional vacuum cleaner brush to remove visible cobwebs, etc. from the immediate area of the detector.

3. Remove the detector from the detector base by inserting a small screwdriver into the tamper-resist access slot while rotating the detector counterclockwise.

4. Push the locking tab on the bottom of the detector toward the center, and then twist and pull to remove the cover.

5. Using a soft brush and vacuum, carefully remove any dust or dirt from around the sensor chambers. See Figure 21 on page 48.

6. After the detector has been cleaned, reassemble and restore it to proper operation.

7. Operate the detector for a minimum of two hours, and then restart the loop controller. If the detector is cleaned properly, the maintenance indicators return to normal condition.

8. Check and record the detectors dirty level reading to verify the effectiveness of cleaning.

9. If cleaning is unsuccessful, return the detector to the factory and replace it with a new detector.


Figure 21: SIGA2 smoke detector with CO sensor

1

2

3

4

56

7

8

1. Mounting base 2. Detector base 3. CO sensor module (on CO detectors only) 4. Smoke chamber: to remove see Figure 24

on page 51

5. Detector cover: twist and pull to remove 6. LED indicator 7. Access slot for tamper-resist mechanism 8. Optics box

CO maintenance reports The CO sensor module has a life span of 6 years. After 6 years, the detector sends out an end-of-life trouble message. When this trouble message is transmitted, replace the CO sensor module. For instructions on how to field replace the CO sensor module, see CO sensor module on page 51.

To determine the months until end of life, request a Maintenance Report. See Figure 22 on page 49.


Figure 22: Maintenance report

CO maintenance alert

In addition to displaying a maintenance alert message when the photo element dirtiness is at or above 80%, the loop controller displays a maintenance alert when the CO sensor module is at or below 6 months until end of life. If both elements are at or beyond these thresholds, there is only one maintenance alert. Once the dirtiness threshold is at 100%, a dirty detector trouble message displays for the photo element. Once there are 0 months until end of life, the panel displays the end-of-life trouble. See CO sensor module on page 51.


SIGA2 replacement procedures Smoke chamber The SIGA2 smoke detectors listed in Table 21 below have replaceable smoke chambers. Replace the smoke chamber of these detectors when, after cleaning the detector, the control panel still indicates a dirty detector.

There are two replacement smoke chambers. Replace the smoke chamber as described on its installation sheet.

Table 21: Replaceable smoke chambers

Model Replaces smoke chamber on

2-SPRC1 SIGA2 -PS, SIGA2-PHS, SIGA2-PHSB

2-SPRC2 SIGA2-PCOS, SIGA2-PCOS-CA, SIGA2-PHCOS, SIGA2-PHCOS-CA

To remove the smoke sensor:

1. Remove the detector from the detector base by inserting a small screwdriver into the tamper-resist access slot while rotating the detector counterclockwise. See Figure 21 on page 48.

2. Remove the cover by pushing the releasing tab on the bottom of the detector toward the center, and then twisting and pulling the cover. See Figure 23 on page 51.

3. Remove the inner chamber or smoke chamber by locating the pry indicators, inserting a screwdriver into the pry locations, and then gently prying the chamber up. See Figure 24 on page 51.

Caution: This product contains components that are sensitive to static electricity. Use approved handling precautions to prevent damage from electrostatic discharge.

To replace the smoke sensor:

1. Using ESD precautions, remove the replacement CO sensor module from its packaging and insert it into the detector.

2. Line up the smoke chamber or inner chamber over the CO sensor module. Push the chamber down over the CO sensor module until it seats into position.

3. Align the slots on the cover with the tabs on the detector and press to seat and lock the cover.

4. Connect the detector to the detector base by rotating the detector clockwise until it snaps into the locked position.


5. Verify that the LED indicator flashes green.

6. After replacing the CO module, perform the sensor function tests required for that detector. See SIGA2 sensor function test procedures on page 45.

Figure 23: Releasing tab on bottom of detector

1

1. Push releasing tab to open detector

Figure 24: Smoke chamber pry locator and location point

2

2

1

1

1. Pry locator 2. Pry location point

CO sensor module

2-CORPL is the replacement sensor for the Signature Series CO detectors listed in Table 22 on page 52. Replace the CO sensor module every six years or when the control panel indicates a sensor end-of-life condition, whichever comes first. Refer to installation sheet P/N 3101589.

Note: For proper operation, never replace the CO sensor itself without the PCB as each board has calibration data specific to the CO sensor.


Table 22: Signature Series CO detectors

Models Name

SIGA2-COS, SIGA2-COS-CA CO Detector

SIGA2-HCOS, SIGA2-HCOS-CA Intelligent Fixed-Temperature/Rate-of-Rise Heat Detector with CO Sensor

SIGA2-PCOS, SIGA2-PCOS-CA Intelligent Photoelectric Smoke Detector with CO Sensor

SIGA2-PHCOS, SIGA2-PHCOS-CA Intelligent 3D Multisensor Smoke Detector with CO Sensor

Use Figure 21 through Figure 25 and the instructions below to remove and replace the sensor.

To remove the CO sensor module: 1. Remove the detector from the detector base by inserting a small screwdriver

into the tamper-resist access slot while rotating the detector counterclockwise. See Figure 21 on page 48.

2. Push the releasing tab on the bottom of the detector toward the center, and then twist and pull to remove the cover. See Figure 23.

3. Remove the smoke chamber or inner chamber by locating the pry indicator, inserting a screwdriver into the pry locations and gently prying the chamber up. See Figure 24 on page 51.

4. Lift the existing CO sensor module to remove. Do not pull on the CO sensor. See Figure 25.

Caution: This product contains components that are sensitive to static electricity. Use approved handling precautions to prevent damage from electrostatic discharge.

To replace the CO sensor module: 1. Using ESD precautions, remove the replacement 2-CORPL module from its

packaging and replace the removed module.

2. If applicable, line up the smoke chamber over the CO sensor. Push the smoke chamber down over the CO sensor until it seats into position.

3. Align the cover slots with the tabs on the detector and twist to lock.

4. Connect the detector to the detector base by rotating the detector clockwise until it snaps into the locked position.

5. Verify that the green LED illuminates.

6. After replacing the CO sensor module, perform the CO sensor function test required. See SIGA2 sensor function test procedures on page 45.


Figure 25: Accessing the CO sensor module [1]

1 B

2

4

1A

3

4

A. SIGA2-COS, SIGA2-COS-CA, SIGA2-HCOS, SIGA2-HCOS-CA B. SI

Documents

270145 R5.0 Signature Series Detector Application Bulletin