Honeywell SS4-AS User manual

Installation Guide and Operating Manual
Multi-Spectrum Digital
Electro-Optical Fire Detector
Model SS4-AS/-AS2
For Special Applications
(Optimized for Hydrogen, Silane, Methanol, Ethanol, and Methane)
Stand-Alone Relay Mode or 4-20 mA Output Option

OPERATOR MANUAL // NOTICES AND TRADEMARKS
HONEYWELL 1
Notices and Trademarks
Copyright 2014 by Honeywell International Inc.
While this information is presented in good faith and believed to be accurate,
Honeywell disclaims the implied warranties of merchantability and fitness for a
particular purpose and makes no express warranties except as may be stated in
its written agreement with and for its customers.
In no event is Honeywell liable to anyone for any indirect, special or
consequential damages. The information and specifications in this document are
subject to change without notice.
The detector must be installed only by qualified professional personnel in
accordance with local codes.
The protection provided by the gas detector may be impaired if it is used in a
manner not specified by Honeywell Analytics.
ACCTTL, ALERT-1, ALARM-2, ALERT-1: ALARM 2, ALERT-1: ALARM-2,
ATAG, Clean Room Sentry, COP-i, Complete Optical Path Integrity, CM1, CM1-
A, DartLogic, FireLogic, Fire Signature Analysis, FireBusI, FireBusII, FirePic,
FirePicII, FirePicIII, FirePix, FirePicture, FSC, Fire Sentry Corporation, Fire
Sentry Corp., FSX, All FSX Nomenclature Variations (such as: FS2, FS2X, FS3,
FS3X, FS4, FS4X, FS5, FS5X, FS6, FS6X, FS7, FS7X, FS8, FS8X, FS9, FS9X,
FS10X, FS10X, FS11, FS11X, FS12, FS12X, FS14, FS14X, FS15, FS15X,
FS16, FS16X, FS17, FS17X FS18, FS18X, FS19, FS19X, FS20, FS20X, FS24,
FS24X, FS24XN, FS26, FS26X, FS26XN), FS7-2173-2RP, FS System 7, FS
System 10, FS7-2173, FS7-2173-RP, FS2000, FS System 2000, High Speed
Flame & Surveillance Detector, Multi-Spectrum QuadBand Triple IR, Multi-
Spectrum TriBand, Multi-Spectrum Tri-Band, Near Band Infrared, Near Band IR,
NearBand IR, QuadBand IR, Room Sentry, RS, RS2, SM2, SM3, SS, SS2,
SS2X, SS2-A, SS3, SS3-A, SS3X, SS4, SS4-A, SS4X, SnapShot, SLR-BIT,
SuperBus, SuperSentry, System 2000, Tri-Mode Plot, QuadBand Triple IR Plus,
TriBand, Tri-Band, “FS & FSC triangle logo’s”, WBIR, Wide Band Infrared,
WideBand IR, Wide Band IR
are registered trademarks of Honeywell International Inc.
Other brand or product names are trademarks of their respective owners.
Honeywell Analytics

OPERATOR MANUAL // SYMBOL DEFINITIONS
HONEYWELL 2
Symbol Definitions
The following table lists those symbols used in this document to denote certain
conditions.
Symbol Definition
ATTENTION: Identifies information that requires special
consideration.
TIP: Identifies advice or hints for the user, often in terms of
performing a task.
REFERENCE-EXTERNAL: Identifies an additional source of
information outside of this bookset.
REFERENCE-INTERNAL: Identifies an additional source of
information within this bookset.
Indicates a situation which, if not avoided, may result in
equipment or work (data) on the system being damaged or lost, or
may result in the inability to properly operate the process.
CAUTION: Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. It may also be used
to alert against unsafe practices.
CAUTION:Symbol on the equipment refers the user to the product
manual for additional information. The symbol appears next to
required information in the manual.

OPERATOR MANUAL // TABLE OFCONTENTS
HONEYWELL 3
TABLE OF CONTENTS
APPROVALS ............................................................................................... 5
SECTION 1 TECHNICAL DESCRIPTION ........................................................................ 6
1.1 Features and Specifications..................................................................................6
1.1.1 General Description.................................................................................6
1.1.2 Applications.............................................................................................8
1.1.3 Detector Locations...................................................................................8
1.2 Stand-Alone Operation .........................................................................................9
1.3 FS2000 System Operation....................................................................................9
1.4 Overview.............................................................................................................10
1.4.1 Model SS4-AS/-AS2 Detector...............................................................10
1.4.2 Detection Range and Field-of View.......................................................11
1.5 Configuration Settings.........................................................................................12
1.6 Testing................................................................................................................14
1.6.1 Special Conditions for Testing...............................................................14
1.6.2 Automatic Testing..................................................................................14
1.6.3 Manual Testing......................................................................................14
SECTION 2 INSTALLATION.......................................................................................... 15
2.1 Installation Instructions .......................................................................................15
2.1.1 Installation Precautions .........................................................................15
2.1.2 Conduit Installation................................................................................15
2.1.3 Wiring Recommendations .....................................................................15
2.1.4 Power Supply Considerations ...............................................................16
2.2 Installation Procedure.........................................................................................16
2.2.1 Configuring and Wiring Detectors..........................................................16
2.2.2 Removing Detector From Its Enclosure.................................................16
2.2.3 Configuring the Detector Module...........................................................16
2.2.4 Wiring the Detector Module...................................................................17
2.2.5 Wiring the SS4-AS/-AS2 Detector for 4 or 20 mA Current
Mode Operation (Optional)...................................................................18
2.2.6 Wiring the Detector Relays....................................................................19
2.2.7 Replacing the Detector Module in the Enclosure...................................19
2.3 Enclosure Installation (optional)..........................................................................19
2.3.1 Installing the Detector on the Swivel Mount (SM2) or SS
Extra Duty (SM4) Swivel Mount............................................................19
SECTION 3 TROUBLESHOOTING AND MAINTENANCE............................................. 22
3.1 Model SS4-AS/-AS2 Detector Faults..................................................................22
3.2 Cleaning Windowed Enclosures and Detectors..................................................23
3.3 Personnel Training..............................................................................................23
3.4 Detector Repair...................................................................................................24
SECTION 4 DETECTOR CONNECTIONS & SWITCH OPTIONS................................... 25
Verification Time.................................................................................................26
Latching26
IR-Only Enable....................................................................................................26
Test Cycle...........................................................................................................26
Fire Range..........................................................................................................26
SECTION 5 OPTIONAL ACCESSORIES....................................................................... 26

OPERATOR MANUAL // TABLE OFCONTENTS
HONEYWELL 4
5.1 Air Shield for Applications in Contaminated Environment
(Part No. DASA1-P)............................................................................................27
5.2 PC Software Kit (2029-INTERFACE-KIT)...........................................................27
5.3 4-20 mA Option (MA420-4).................................................................................27
5.4 Detector Mounts (SM2 or SM4)..........................................................................27
5.5 Test Lamp (FT2045 or FT-2145).........................................................................27
SECTION 6 DETECTOR LABEL DRAWINGS ............................................................. 28
INDEX ........................................................................................................ 29
Read and understand this manual before installing or
operating equipment.

OPERATOR MANUAL // APPROVALS
HONEYWELL 5
APPROVALS
The Model SS4-AS/-AS2 Multi-Spectrum Fire Detectors have been manufactured
in compliance with the requirements of the ISO-9002 standard and have been
approved by:
•California State Fire Marshal (CSFM)
•Factory Mutual (FM)
•Canadian Standards (CSA)
•CENELEC approval by FM Approvals Ltd.Certification Service in
compliance with the ATEX Directive.

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 6
SECTION 1
TECHNICAL DESCRIPTION
1.1 Features and Specifications
1.1.1 General Description
The Model SS4-AS/-AS2 Multi-Spectrum Electro-Optical Fire/Flame Detectors are
fast-reacting (within 5 seconds), digital, configurable, microprocessor-based,
“smart” units. This Detector has sensitivity to Type A, B, and C flaming fires. They
are optimized for detection of hydrogen, ethanol, methanol, and methane (natural
gas) fires. Detectors of this design process Ultraviolet (UV), Wide Band Infrared
(IR), and Visible (VIS) spectral ranges from ruggedized Solar-blind UV, “Quantum-
Effect” IR, and Visible (VIS) sensors correspondingly. They are equipped with
SRL-BIT (Built In Test) for optical “through the lens” of both the sensors and lens.
These UV, IR, and VIS Fire Detectors have false alarm immunity, and alarm range
between 15 and 60 feet for a one square foot heptane, gasoline, kerosene, or
isopropyl alcohol pan flame with a 120-degree (±60 degrees from the axis)
conical field of view. Additional optimization for hydrogen assures a less than 5
second response to a 10-inch hydrogen flame at 15 ft.. Their microprocessor-
based algorithms (FirePic, SnapShot, and Tri-Mode Plot) assure time
programmable alarm verification, Fire Signature Analysis, and compatibility with
standard FM Approved or UL Listed fire alarm panels.
The Detector has the flexibility to be re-configured in the field. Its installation is
simple, and operation straightforward due to the built-in self-testing feature.
Therefore, the maintenance consists mainly in keeping the Detector window lens
clean, and performing periodic testing required by the manufacturer of the Fire
Control and Suppression System.

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 7
Other Specifications:
Housing: Explosion-Proof, Copper-free Aluminum (< 0.4%) with powder
coated finish, or Optional 316 Stainless Steel, NEMA type 3 and
type 4, tamper-resistant with integral dual ¾ inch NPT conduit
openings.
Marking: Class I, Div. 1 & 2, Groups B, C, & D
Class II, Div. 1 & 2, Groups E, F, & G
Class III
Class I Zone 1 AEx d IIC
Ex d IIC; Ex tb IIIC
Temperature: Operation: -40 to +85°C (-40 to +185º F)
Storage:-55 to 105°C
Humidity range: 10% to 90% (RH), non-condensing
NOTE: The supply connection wiring shall be rated at least
10°C above the rated service temperature (95°C for T4 applications
and 85°C for T5 applications). See Figures 8 and 9 on Page 17 of this
Insruction Manual.
Weight: Aluminum housing is approximately 3.8 lbs.
Stainless Steel is approximately 8.9 lbs
Dimensions: 4.81 inches diameter by 4.40 inches high
LED Visual Indicators:
Powered Detector: Dual LEDs blink every 10 seconds
Fault Declared: One LED turns ON solid until the fault is cured
Re-calibrate when: Both LEDs flash ON and OFF rapidly
Fire Declared: Both LEDs ON solid (one LED blinks during first
few seconds)

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 8
Electrical Power Requirements:
Connectors: WECO type screw connectors, recommended
Wire: 18 to 24 AWG
Input Voltage range: 24 Volts DC nominal, 20.5 to 32 Volts DC
Normal Operation Current: 68 mA nominal (72 with optional
MA420-4 Module)
Fire Alarm Current: 75 mA nominal (95 with optional MA420-4
Module)
Analog Current Output: 4 or 20 mA with optional MA420-4 Module.
Relay Contact:
Rating: 0.5 Amp at 120 Volt AC or 1 A at 24 V DC
resistive
Fire relay: N.O. and N.C. contacts (Latching/Non-Latching,
switch selected)
Verification relay: N.O. and N.C. contacts (Adjustable time from
0 to 30 seconds)
Fault relay: N.O. and N.C. contacts
1.1.2 Applications
Applications of the Model SS4-AS/-AS2 Detectors include storage warehouses of
Ethanol, Methanol, and Methane (Natural Gas) and Hydrogen gas, among others.
1.1.3 Detector Locations
For unobstructed performance, considering Detector locations in application
areas, avoid sources, other than fire, which may cause false alarms, such as
operations utilizing welding or gas torch equipment, high power sources of EMI
or RFI, or artificial lighting pointed directly at the Detector. Locations experiencing
strong mechanical or acoustical vibrations should also be avoided. For optimum
performance, locate the Detector(s) as close as possible to the potential fire
source, preferably, along the axis of the vision cone. Install enough Detectors to
completely eclipse the fire hazardous area. Assure accessibility for the Detector
lens cleaning, as well as best possible protection and/or cleaning from fog, rain,
ice, dust, hazardous atmospheres, and other adverse elements. If necessary,
utilize the Steel Swivel Mount (Model SM2) or 316 Stainless Steel Swivel Mount
(Model SM4) for greater flexibility in mounting locations (See Figures 4 and 5).

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 9
1.2 Stand-Alone Operation
For Stand-Alone operation, the Detector may be connected to a FM Approved or
UL listed Fire/Security Panel. The Detector operated in the Stand-Alone mode,
uses the Fire, Fault, and Verify (optional) relays or optional 4 to 20 mA current
source (FSC Model MA420-4 Module, refer to Section 4.3) to interface with the
Fire/Security Panels. For Stand-Alone operation, the Detector’s Fault relay is
automatically configured by the on-board microprocessor. The input current of
the Detector is about 15 mA higher in the Stand-Alone mode compared to
FS2000 System operation.
NOTE: The Fault relay is not available when the Detector is wired to
the FS2000 System.
1.3 FS2000 System Operation
For FS2000 System operation, the Model SS4-AS/-AS2 Fire and Fault signals
are sent digitally to the FS2000 System Controller using the four wire FS2000
FireBus. The FireBus provides 24 Volt DC power for the Detector and RS-485
digital communication (Refer to Honeywell Analytics document MN0003:
"FS2000 FIRE EARLY WARNING SYSTEM - INSTALLATION and
OPERATIONS GUIDE"). For special remote alarm applications, users may also
connect directly to the Detector’s Fire alarm relay.
NOTE: When the Model SS4-AS/-AS2 Detector is connected to
the FS2000 System using FireBus communication, the Controller
automatically disables the Detector’s Fault relay.

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 10
1.4 Overview
1.4.1 Model SS4-AS/-AS2 Detector
Version SS4-AS: There are two (2) LEDs on the Model SS4-AS Detector that
indicate the state of the Detector. During normal operation both LEDs will blink
every 10 seconds.
If the Detector alarms to a fire, it energizes the Fire relay and turns on both LEDs
in the following sequence. One LED is turned on immediately and the second
LED will rapidly blink for several seconds indicating that the Detector's FirePic
spectra is being permanently stored in the Detector's solid-state memory (FirePic
is the several seconds of Detector spectral data which precedes an alarm event).
Once the FirePic data is stored, the second LED will remain on. For this version,
the fire alarm LEDs turn on and remain on until power to the unit is cycled (turned
off and on again).
If the Detector has a Fault, it de-energizes the Fault relay and turns one (1) LED
on (the LED will not light if the Fault is a “No Power Fault”). If the Fault condition,
such as a “Low Voltage Fault”, is eliminated the Detector will automatically return
to Normal Operation.
NOTE: Faults caused by excessive input voltage or due to temperatures
outside the operating temperature range require factory re-certification.
Re-certification is required if a Fault is indicated by both LEDs rapidly
blinking (with frequency about 2 Hz.).
Version SS4-AS2: The operation of this unit is identical to the SS4-AS, except
the fire alarm LEDs turn off once the fire threat is eliminated, without power
cycling of the device.

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 11
1.4.2 Detection Range and Field-of View
The SS4-AS detection range is field adjustable between 15 and 60 ft. in 15 ft.
increments to an industry-standard one square foot heptane, gasoline, kerosene,
or isopropyl alcohol pan fire within 5 seconds.
The Detector is also optimized for the following specific type of fuels and will
alarm to the resultant fire within five (5) seconds. Careful attention should be
given to the Detector sensitivity setting for these types of fires.
•Hydrogen: 10” (ten inch) fire height at a distance of 15 ft. with the
Detector sensitivity setting of 15 ft.
•Ethanol: One square foot pan fire at a distance of 15 ft. with the Detector
sensitivity setting of 15 ft.
•Methane (Natural Gas): 30” (Thirty-inch) fire height using a 3/8” orifice
at a distance of 15 ft. with the Detector sensitivity setting of 15 ft.
•Methanol:
One square foot pan fire at a distance of 7.5 ft. with the Detector
sensitivity setting of 15 ft.
One square foot pan fire at a distance of 15 ft. with the Detector
sensitivity setting of 30 ft.
Two square foot pan fire at a distance of 60 ft. with the Detector
sensitivity setting of 60 ft.

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 12
The Detector incorporates a 120-degree conical Field of View. The fire emissions
received by the Detector diminish at extreme range and edges of the field-of-
view. It is recommended that the Detector be pointed at the fire threat area for
the fastest response times to the smallest size fire. When multiple Detectors are
used to cover large areas, the Field-of-Views should overlap to insure complete
coverage of the fire threat area. The Field-of-View is not, however, limited to 120
degrees. Larger fires outside the 120 degree Field-of-View may cause the SS4-
AS/-AS2 to alarm. Based on the Inversed Square Law for radiated energy, a
larger size fire outside the Detection Range and field-of-view may cause the
Detector to alarm. Refer to Figure 1.
120 Degrees
Figure 1: Field of View, Horizontal, and Vertical.
Sensitivity to 1 Sq. Ft. Gasoline Pan Fire
1.5 Configuration Settings
The SS4-AS/-AS2 Detector may be reconfigured in the field and thus optimized
for special applications. The configuration of the Detector is set from a DIP
switches located on the middle circuit board of the Detector Module. The DIP
switch settings for each configuration are listed in Table 2.
These configurable options include:
1. Fire Verify Relay - The Verify Relay may be disabled or enabled with
several Verify Time settings. It also may be set to act as another Fire
Relay. The Verify Time may be set from 5 to 30 seconds in 5
seconds increments. The Factory setting: Verify Relay Disabled.
When the Verify Relay is enabled and Verify Time is set the Verify
Relay will energize and the Fire Relay will de-energize if the fire
conditions are still present at the end of the Verify Time period. In the
opposite case, the Detector will wait for 5 seconds plus another Verify
Time period to test for the fire conditions. This wait and verify cycle
will repeat 10 times or until the presence of the fire is confirmed. This
concludes the verification process. If the presence of the fire is not
established the Fire Relay will remain energized unless Non-Latching
mode is set. In case a subsequent fire is detected the entire
verification process will be repeated. The state of the Fire and Verify

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 13
Relay after the verification process will depend on the choice between
Latching and Non-Latching modes.
NOTE: When the Verify Relay is enabled and Verify Time
is set, the Fire Relay will de-energize when the Verify
Relay is energized.
2. Latching / Non-Latching - The Fire Relay and Verify Relay may be
set in a Latching or Non-Latching mode. The Factory setting for the
SS4-AS is Latching and the SS4-AS2 is Non-Latching.
If the SS4-AS or SS4-AS2 Latching mode is selected, the Fire or
Verify Relay will energize and Red LEDs will remain illuminated until
the Detector power is cycled (power is turned off then on).
If the SS4-AS Non-Latching mode is selected, the Fire or Verify
Relay will de-energize after 10 seconds and the Red LEDs will remain
illuminated until power is cycled.
If the SS4-AS2 Non-Latching mode is selected, the Fire or Verify
Relay will de-energize and the Red LEDs will turn-off after 10
seconds.
3. Test Period - This setting pertains to the Through-the-Lens test
period, which may be set to 6 or to 30 minutes. The 6-minute period
may be required in applications where the lens is frequently obscured.
The Factory setting is 30 minutes.
NOTE: Utilization of the 6-minute period may adversely
affect the source tube service life.
4. IR-Only Enable / Disable
The IR only setting allows the Detector to declare a Fire on events
where UV is not present or is obscured.
In applications where UV absorbing fumes are commonly present in
high concentrations (these fumes are usually toxic and should require
masks or breathing equipment), the Detector will function. The
Factory setting for IR-Only is Disabled.
WARNING:This setting should be used only in special
indoor applications.
5. Fire Detection Range Setting - 15, 30, 45, or 60 ft.. The Factory
setting is 45 ft..This setting should be changed only if the Detector is
located too close to the fire threat area and in the presence of
abnormally high UV.
NOTE: Refer to section 1.4.2. for Detector range
setting details for industry standards and specific fuels.

OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL 14
1.6 Testing
1.6.1 Special Conditions for Testing
The SS4-AS/-AS2 Detector should be tested immediately after installation, after
repair or maintenance involving wiring or model replacement, after periodic
maintenance, or after lens contamination has been identified.
1.6.2 Automatic Testing
Automatic SLR-BIT (Built In Test) “through-the-lens” self-testing is performed,
during Detector operation, for virtually all-internal electronic systems at the
selected Test Period (Section 1.5, 3). One of the Red LEDs will remain
illuminated (Fault) to indicate contamination of the window lens, missing the
protective Self-test grill, or when removing the enclosure cover.
1.6.3 Manual Testing
For manual testing, the SS4-AS/-AS2 Detector may be exposed to an actual
industry standard open flame or to a Test Lamp simulating a fire. It is mandatory
to use the Honeywell Analytics handheld UV/IR Test Lamp Model No. FT-2045 or
FT-2145 with SS4 Fire Detectors. The FT-2045 and FT-2145 Test Lamps are
housed in an Explosion-Proof enclosure, powered by internal rechargeable
batteries, and designed for indoor and outdoor use. For additional information on
the Test Lamp, refer to FSC Specifications SP0242 for the FT-2045 or 1505-
008A for the FT-2145.
NOTE: Other manufacturers UV/IR Test Lamps should not be utilized
to test FSC Detectors; conversely, the Models FT-2045 and FT-2145
Test Lamp should not be utilized for testing other manufacturer’s
Detectors.

OPERATOR MANUAL // SECTION 2
INSTALLATION
HONEYWELL 15
SECTION 2
INSTALLATION
2.1 Installation Instructions
This section describes the installation of the Model SS4-AS/-AS2 Detector for the
Stand-Alone relay mode. It is recommended that junction boxes be used to wire
the Detectors. Determine the configuration settings for the device(s) and the
number of connections to be used (Fire, Fire Verify, Fault, and Power) depending
on the desired Detection Range and the Fire Control Panel type used (refer to
the Fire Control Panel Manual for details).
2.1.1 Installation Precautions
The following precautions should be observed during installation of Model SS4-
AS/-AS2 Detectors.
1. Make sure that the external electrical power is turned OFF before
connecting the Model SS4-AS/-AS2 Detector.
2. Printed circuit board components of the Detector are susceptible to
damage from electrostatic discharge. Do not handle the Detector's
module (and its printed circuit boards) without adequate grounding
and observing all necessary measures to prevent the effect of
electrostatic discharge (ESD).
2.1.2 Conduit Installation
When planning the conduit, follow these recommendations.
1. If only one of the two 3/4 inch NPT conduit openings on the
Model SS4-AS/-AS2 Detector enclosure is used, seal the unused
opening with a threaded plug and approved sealing material.
2. In areas where moisture may accumulate, install an approved conduit
trap or drain.
3. A seal should be installed 6 inches from the enclosure wall for all
applications requiring a Class I, Div. 1 Explosion-Proof rating.
2.1.3 Wiring Recommendations
To prevent intermittent connections, Honeywell Analytics recommends using
junction boxes. Install a junction box near each Detector location. Wire each
Detector to its junction box. Use screw-down terminal strips inside the junction
box to make the connections from the Detector's terminals to an FM Approved or
UL listed Fire Alarm Panel. Also use FM/UL Approved junction boxes and
terminal strips.
NOTE: Avoid wire splices. However, if wire splices are necessary,
all splices should be soldered. Utilization of good wiring practices will simplify
installation, improve reliability, and facilitate maintenance.

OPERATOR MANUAL // SECTION 2
INSTALLATION
HONEYWELL 16
2.1.4 Power Supply Considerations
The Model SS4-AS/-AS2 Detector uses 24 Volts DC at a maximum current of
75 mA (with the 4-20 mA option the maximum supply current is 95 mA). Make
sure the Panel's power supply can withstand the load current of the total number
of Detectors connected to it. For example, if 10 (ten) Model SS4-AS/-AS2
Detectors are connected to a single Panel's power supply (multiplying 75 mA by
10), the power supply must be able to withstand at least 750 mA + 10% (0.75 A +
10%). This load current must also be taken in consideration for calculating the
Panel's 24-hour power backup requirements.
2.2 Installation Procedure
2.2.1 Configuring and Wiring Detectors
To configure and wire a Model SS4-AS/-AS2 Detector, or to replace the
Detector module, the module must be removed from the enclosure. After the
configuration settings and wiring connections have been completed, the module
should soon be re-installed in the enclosure to avoid contamination from the
environment.
NOTE:Avoid touching the Detector sensors at the front of
the Detector module. If touched accidentally, they should be cleaned
per instructions of Section 3.2.
2.2.2 Removing Detector From Its Enclosure.
a. With electrical power off (verify that electrical power is off by making sure
that the Detector's LEDs do not blink for at least 15 seconds), loosen the
Allen-head screw at the base of the metal enclosure top lens cover.
b. Remove the cover and set it aside along with the "O" ring avoiding
contamination.
c. Loosen the three Philips head captive screws located on the top circuit
board.
d. Carefully lift out the module, sliding it along the three metal standoffs.
2.2.3 Configuring the Detector Module.
Set the DIP switches located on the center PC board of the Detector module to
desired settings. Refer to Section 1.5 and Table 2 for DIP switch settings.

OPERATOR MANUAL // SECTION 2
INSTALLATION
HONEYWELL 17
2.2.4 Wiring the Detector Module.
a. Insert the cables into the metal enclosure base through one of the
conduit openings. Refer to Figure 6.
b. Connect the 24 Volt DC power supply wires to pins 1 (-) and 4 (+) of the
J1 or J2 connector, observing the correct polarity. Refer to Figure 2.
Firmly tighten down the two slotted screws with a small screwdriver
taking care not to over-tighten the screws.
Pins 2 and 3 of the J1 and J2 connectors are the RS-485 interface used only for
downloading the FirePic from the Detector’s non-volatile memory, or for viewing
the Tri-Mode Plot. It is recommended to wire pins 2 and 3 to a separate junction
box and properly identify them for future use. A color-coded, multi-connector,
shielded, UL-rated cable with 18 to 24-gauge wire is recommended for
connecting to J1 or J2. The following color-coding is suggested as a guideline:
Pin 1 Pin 2 Pin 3 Pin 4
Black Green or Blue White or Yellow Red
DC Return ( - ) RS-485( - ) RS-485( + ) +24 VDC Power ( + )
*Fault Relay
Verify
Relay
* Fault relay is shown in the energized condition
during normal operation (No Fault).
Figure 2: Model SS4-AS/-AS2 Detector Wiring
(Bottom View of SS4-AS/-AS2 Detector Module)

OPERATOR MANUAL // SECTION 2
INSTALLATION
HONEYWELL 18
2.2.5 Wiring the SS4-AS/-AS2 Detector for 4 or 20 mA Current Mode Operation (Optional)
For applications requiring a 4-20 mA analog output, order the Detector with the
Optional 4-20 mA Module Assembly, P/N MA420-4. The module must be
Factory installed and certified along with the Detector.
The following analog output levels are available from the Detector equipped with
the MA420-4 Module. The module is capable of driving a maximum load
impedance of 283 Ohms:
NORMAL Operation 4 +/-0.6 mA
ALARM 20 +/-0.6 mA
FAULT < 0.6 mA
To use the analog output of an SS4-AS/-AS2, make the following connections:
24 V DC J2, pin-4
24 V DC RTN J2, pin-1
4-20 mA output J5, pin-4 (+)
4-20 mA RTN J1, pin-1 (-)
The fire Alarm and fault relays of the Detector equipped with the MA420-4
Module are not usable. However, the Detector’s Verify Relay may still be used as
a separate Fire Alarm output. Refer to Table 2: “Configuration DIP Switch
Settings” to set DIP switches properly.
NOTE: J1 is a "loop through" connection to J2. The +24 V supply
is connected to J2 pin 4. The red lead connection of the MA420-4 must
stay in J1, pin-4. Also, the 8.66 K Ohm supervising resistor must remain
connected at the Fire Alarm relay contacts J4 pin-4 to J4 pin-1, or a Fault
condition will occur.
Figure 3: SS4 DetectorModule with MA420-4 Installed
(Rear View)

OPERATOR MANUAL // SECTION 2
INSTALLATION
HONEYWELL 19
2.2.6 Wiring the Detector Relays
a. Insert relay cables into the Detector enclosure base through one of the
conduit openings. Refer to Figure 6.
b. Fire Alarm Relay - Connect wires for Fire Alarm to the appropriate J4
terminals of the Detector. For Normally Open relay contacts, install
wires into pins 3 and 4 and firmly tighten down the slotted screws with a
small screwdriver. The Fire Alarm relay is de-energized during normal
operation and will energize when detecting a fire.
c. Fault Relay – Connect wires for Fault to the appropriate terminals of the
J5 connector. For Normally Closed relay contacts, install wires into pins
3 and 4 and firmly tighten down the slotted screws with a small
screwdriver. The fault relay is energized during normal operation and
with no fault detected, as shown in Figure 2. The fault relay will de-
energize when a fault is detected.
2.2.7 Replacing the Detector Module in the Enclosure.
a. Carefully re-install the module over the three metal standoffs and screw it
down with the three captive screws to the standoffs.
b. If necessary, clean the Detector’ sensors and windowed cover per
instructions of Section 3.2.
c. Securely screw down the metal enclosure top windowed cover and
tighten the Allen-head "tamper-proof" screw.
2.3 Enclosure Installation (optional)
2.3.1 Installing the Detector on the Swivel Mount (SM2) or SS Extra Duty (SM4) Swivel Mount
a. Select fasteners for the swivel mounting such that they will secure it to
the type of material at the enclosure location.
b. Mount the swivel-mount to the wall assuring correct orientation.
c. Install the mounting bracket onto the Model SS4-AS/-AS2 Detector
enclosure using the #¼-20 or #6 mm screws and nuts provided. If
oriented correctly, the outside contours of the mounting ears on the
Detector enclosure and the ends of the bracket will match. The large
diameter of the threaded insert should face the enclosure.
d. Screw the enclosure/bracket assembly onto the ball or swivel stud. Turn
the Detector until the stud bottoms against the enclosure. Do not
tighten. While holding the enclosure, tighten the jam nut against the
bracket.
e. While holding the enclosure, loosen the socket head screw on the SM2
swivel-mount or swivel release bolt SM4. Position the enclosure in such
a way that the conduit openings are located horizontally at the bottom.
Point the enclosure in the desired direction and tighten the appropriate
hardware.