System 3 from Siemens Industry, Inc. was
developed as a flexible, wide range fire detection
and control system. System 3 uses a modular
concept: Only those functions desired in each
system are built into that system. Any number of
various input and output circuits may be customassembled in various size enclosures.
This manual contains information regarding
only System 3 equipment and detectors that
are US Coast Guard approved under
Certificate No. 161.002/17/8. The use of any
other equipment in systems required by US
Coast Guard regulations, but not US Coast
Guard approved, should only be considered
when absolutely necessary. Special US Coast
Guard one time approval would be required.
Drawing No. 315-085585 (Coast Guard System 3 Specification) is considered a part of
this manual (See print in Appendix, page 30).
In addition, the typical internal module to
module wiring of two control panels is shown
on pages 2 and 3 in the form of typical Wire
Lists. Either a wiring list of this type or a
complete point to point wiring diagram should
be furnished with every system and should be
kept as on-board documentation for future
reference in system service and maintenance.
NOTE: When designing Fire Control Systems
for various types of vessels, the designer
should be aware of the required vessel type,
domestic and SOLAS regulations applicable
for that vessel.
It is a US Coast Guard requirement that the
fire detection system have two sources of
power. Most large ships have both main
generators and emergency generators;
therefore, they can satisfy this requirement
by arranging to have power supplied to the
fire detection system by both the main and
emergency generators.
A US Coast Guard approved Power
Transfer Relay must be used for the
automatic transfer from main power to
secondary power when the main power
source has 15% to 20% potential variation.
The transfer to secondary power creates a
visual and audible trouble signal on the CP35 Control Panel. The Model PTR-1 Power
Transfer Relay from Siemens Industry, Inc.
has been designed for this purpose and is
US Coast Guard approved.
In cases where there are no emergency
generators, battery backup power to the
system is required. Revised US Coast
Guard regulations have reduced the
required battery operation time to 36 hours
for passenger ships and 18 hours for all
other types of vessels. In cases where it is a
desired option to furnish the fire detection
system with standby battery power, even
when there are main and emergency
generators supplying the system, there is no
specific battery operation time period,
although it would be recommended to be a
minimum of 18 hours.
When the smoke detection system is
furnished with battery backup power, it is
necessary to calculate the system power
requirements to determine the battery
ampere-hour capacity necessary. The
calculations can be done on the Power
Calculation Sheet (page 24) and the Battery
Curves shown on pages 26 and 27. Another
requirement involving battery power is that a
voltmeter and ammeter (MM-35) are
furnished. The voltmeter and ammeter are
not required when the batteries are used as
a third power source.
4
Page 10
1. MODULES
SECTION III
EQUIPMENT DESCRIPTIONS
AND FUNCTIONS
CP-35 MAIN CONTROL UNIT
This control unit contains system power,
alarm and trouble indicating lamps, lamp
test/reset, trouble and subsequent alarm
silence switches, one supervised 1.5A
audible alarm circuit, and two detection
zones not to be used for US Coast Guard
approved systems because these zones do
not have alarm and trouble test switches.
(See Spec Sheet Catalog No. 3060 for
terminal identification.)
PS-35 POWER SUPPLY
This 10A power supply converts the 115
VAC, 60 or 50 Hz and supplies 24 VDC to
all modules in the System 3 Control Panel.
(See Spec Sheet Catalog No. 3061 for
additional details.)
BC-35 BATTERY CHARGER MODULE
This module is required to automatically
transfer power from normal power to battery
power and also to charge the batteries. It
can charge battery sizes up to 25 amperehours, and the charging capacity can be
increased in increments of 25 AH to a limit
of more than 100 AH by use of the BE-35;
see below. (See Spec Sheet Catalog No.
3177.)
BE-35 BATTERY EXTENDER
MODULE
This extender module increases the 25 AH
charging capability of the BC-35 by another
25 AH when larger batteries are required,
based on a 48 hour recharge period, as per
ULI requirements. (See Spec Sheet Catalog
No. 3177.)
MM-35 METER MODULE
This module includes the US Coast Guard
required voltmeter and ammeter to display
battery voltage and charging current when
batteries are used as the second power
source. The meters are not required when
battery power is a third power source. (See
Spec Sheet Catalog No. 3355.)
TC-30U BATTERY TRANSFER
MODULE
This module is required to use separate
ship battery power when available. Ship
battery power would have its own charging
method.
5
Page 11
Section III — Equipment Descriptions and Functions
ZU-35TS ZONE MODULE
This module includes two detection zones
with alarm and trouble LEDs, test switches,
and output terminals to activate other
appropriate modules or remote annunciators. It can accommodate up to thirty
ionization, photoelectric, or flame detectors,
or a combination thereof. The number of
thermal
detectors, manual stations, and other
approved contact devices that can be wired
on a single zone are under practical limitations only. (See Spec Sheet Catalog No.
3107.)
ZS-30 INTRINSICALLY SAFE ZONE
MODULE (See NOTE on page 15.)
This module allows certain ionization
detectors, thermal detectors, and manual
stations of the non-explosionproof type to
be installed in hazardous areas classified
as Class I, Division I, Groups A, B, C, and
D. A diode shunt barrier is required outside
the hazard area to limit the energy in the
event of equipment failure. Only ten Model
DI-3IS Ionization Detectors or five Model
S-121/122 Flame Detectors, and any
number of approved thermal detectors or
manual stations, can be connected to this
single zone module. (See Spec Sheet
Catalog No. 3105.)
Note: Unlike the ZU-35TS, this single
zone module does not have its
own zone alarm and trouble test
switches. Therefore, it is
necessary to use an SM-30 switch
module alongside the ZS-30 to
satisfy this test capability
requirement.
RC-30U CONFIRMATION MODULE
This module is designed to reduce unwanted
alarms from the momentary presence of
products of combustion — low ceiling heights
where smoking is allowed, for example. It
records the first alarm from zones under its
control, but does not put the control panel into
the alarm mode unless the detector response is
repeated within 1 minute (time adjustable) or
less. (See Spec Sheet Catalog No. 3167.)
AE-30U ALARM EXTENDER MODULE
This module is used whenever the total alarm
device power exceeds the supervised 1.5A alarm
circuit that is included in the CP-35, or where
separate alarm circuits are required. Each
AE-30U offers another supervised 1.5A, and
AE-30U modules can be used in whatever
multiples are required. (See Spec Sheet
Catalog No. 3129.)
MC-30 MASTER CODE MODULE
This module is designed to provide a pulse
(120/minute) on the audible and visible signal
devices. It is capable of controlling up to three
audible signal circuit AE-30U modules. (See
Spec Sheet Catalog No. 3163.)
ZN-31U CONTACT MODULE
See SpecSheet Catalog No. 3108.
ZN-34UA, ZN-34US INPUT MODULES
These modules are designed to provide two
circuits for the supervision of sprinkler system
gate valves and ancillary equipment in accordance with NFPA Standard 72. The modules
provide two yellow LED indicators per circuit. The
first illuminates when a supervisory condition
exists and the second when a circuit trouble
condition occurs. The module utilizes an end-ofline resistor in parallel with normally open
switches to provide this supervision. (See Spec
Sheet Catalog No. 3111.)
6
Page 12
2. SUPPLEMENTARY MODULES
Section III — Equipment Descriptions and Functions
SR-30 RELAY MODULE
This module has two SPST relays with 3A
contacts. (See Spec Sheet Catalog No.
3121.)
SR-32 RELAY MODULE
This module has six DPDT relays with 3A
contacts. (See Spec Sheet Catalog No.
3125.)
SR-35 RELAY MODULE
This module has eight SPDT relays with 2A
contacts. (See Spec Sheet Catalog No.
3130.)
TL-30U TIME LIMIT MODULE
This module is designed to provide any
required timing function (time in or time out)
with field adjustment possible between 1
second and 10 minutes. (See Spec Sheet
Catalog No. 3166.)
SM-30 SWITCH MODULE
This module provides two manual on/off
switches that can be used for any desired
purpose. The switches put the system into a
trouble condition and use LED trouble lights
to identify which switches are switched to
off-normal. (See Spec Sheet Catalog No.
3162.)
RM-30U and RM-30RU RELEASE
MODULES
These modules are designed to provide a
supervised 1.5A release circuit for damper
release or similar functions. They both have
a 24 VDC output, but the RM-30RU includes
three series resistors that can adjust for 6, 12,
18, or 24 VDC resistance. (See Spec Sheet
Catalog No. 3162.)
DM-31 DISTRIBUTION MODULE
This module is a terminal strip for use when
multiple enclosures are required on large
systems. (See Drawing 515-021941 in
Appendix.)
AD-30S SUPERVISED ANNUNCIATOR
DRIVER
This module is designed to be installed with
other modules in the System 3 Control Panel.
The AD-30S is a supervised annunciator driver
module which will supervise groups of 8
indicators and the wires going to these
indicators. If you required 1 supervised, 8-zone
annunciator, you would require 1 AD-30S.
However, if you required a 24 zone supervised
annunciator, then 3 AD-30Ss would be needed
to drive the annunciator.
PM-31 and PM-32 PROGRAM
MATRIX MODULES
These two modules are designed to provide
complex supplementary control that would
be difficult to arrange with relays. (See Spec
Sheet Catalog No. 3169.)
7
Page 13
Section III — Equipment Descriptions and Functions
3. ENCLOSURES
EA-32, EA-33, and EA-35 ENCLOSURE
The selection of the required number of modules
for a given system determines the necessary
enclosure size. The enclosure model number
indicates the number of module rows: the EA-32
has two, the EA-33 has three, and the EA-35 has
five. Each module row contains eight module
spaces, but some modules require more than
one space. On large systems it may be desirable
or necessary to use more than one enclosure.
This can be accomplished through the use of the
DM-31 distribution module, which is used as a
terminal strip.
SHOCK MOUNTING FOR ENCLOSURES
All enclosures should be shock mounted and drip
proof with an upper door shroud and Lexan
window lenses. A US Coast Guard approval
nameplate must be affixed to the door. (See Spec
Sheet Catalog No. 3325 for sizes and dimensions
and pages 8-9 for shock-mount and drip-proof
shroud installation.)
ASSEMBLY INSTRUCTIONS FOR COAST
GUARD MOUNTING KIT VIK-1
1. On the Table on page 9 locate the
enclosure model to be installed. Determine
the number of isolators to be used and the
distance between the isolator centers.
2. Mark isolator centers to be used on the
bulkhead and draw perpendicular lines
through each of the centers.
3. Drill 5/16 inch clearance holes into bulk-head.
Mount isolator to bulkhead with 1/4-20x3/4"
cap screw, washer and lockwasher. Tighten
to 13 ft-lbs of torque. Refer to the stud
assembly illustration (Figure 1, page 9) for
the proper hardware sequence.
4. Mount the enclosure to the isolators (Refer to
the Mounting Diagram, Figure 2, page 9) with
1/4-20x1/2" cap screw, washer and
lockwasher. Tighten to 13 ft-lbs of torque.
NOTES: Flexible conduit or cable with a
maximum diameter of 3/4 inch and a
minimum length of 18 inches from a
rigid connection should be used to
house external wiring.
PTR-1 POWER TRANSFER RELAY
The PTR-1 is an automatic power transfer relay
that transfers power from the main generators, at
a 15% to 20% potential reduction, to the backup
generators. This automatic transfer creates an
audible and visual system trouble signal. The
PTR-1 is in its own enclosure. (See Appendix for
PTR-1 Connections, Cover, and Enclosure.)
8
Page 14
Section III — Equipment Descriptions and Functions
#1/4-20 SOCKET HEAD
CAP SCREW 3/4" LONG
#1/4 FLAT WASHER
#1/4 INTERNAL LOCKWASHER
(USE FLAT WASHERS UNDER
HEAD TO MEET MAX 2
THREAD REQUIREMENT)
Note:
The VIK-1 Kit can only be used
on bulkheads with a thickness
of no greater than 5/16 inch.
#1/4-20 SOCKET HEAD CAP
SCREW 1/2" LONG
#1/4 FLAT WASHER
#1/4 INTERNAL LOCKWASHER
ISOLATOR
A
B
Note:
1. Prior to mounting enclosure EA-35, drill four new
5/16 inch diameter holes located vertically at the A
and C dimensions, in addition to redrilling the
existing mounting holes to 1/2 inch.
MOUNTING DIAGRAM FOR EA-32, -33, AND -35 ENCLOSURES
FOR COAST GUARD APPLICATION
Figure 2
C
D
20 7/8”
ERUSOLCNE
EZIS
ABCD
23——— ½024
33—½51—136
533162932501
RETNEC
)SEHCNI(ECNATSID
ROTALOSIFO.ON
DERIUQERSTIK
9
Page 15
Section III — Equipment Descriptions and Functions
INSTALLING THE CGFK-1 FILTER KIT
1. Using the bracket as a template, hold the
bracket up against the upper right-hand side
of the enclosure, close to where the PS-35 is
mounted. (Refer to Figure 3-Mounting.)
2. Mark the location of the four holes in the
bracket on the side of the enclosure.
3. Drill four 0.18" diameter holes in the locations
marked on the side of the enclosure.
4. Mount the bracket assembly using the #8-32
screws, flat washers, lock washers and nuts
as shown in Figure 3-Mounting.
5. Insert the AC line wires into the positions
shown in Figure 3-Wiring.
6. Snap the terminal block covers into place.
7. Connect the filter load wires from the filter
to the PS-35 terminal block as shown in
Figure 3-Wiring.
BROWN
GREEN
HOT
GROUND
AC LINE
FILTER BRACKET
BLUE
FILTER
NEUTRAL
GREEN WIRE (24" LONG)
TO PS-35, TERMINAL 4
LINE
CORCOM
EMI FILTER
P/N 10VR3
LOAD
BROWN
BLUE WIRE (24" LONG)
TO PS-35, TERMINAL 2
BLUE
(MOUNTING)
BROWN WIRE (24" LONG)
TO PS-35, TERMINAL 1
10
(WIRING)
Figure 3
INSTALLING THE CGFK-1 FILTER KIT
Page 16
4. REMOTE ANNUNCIATION
Section III — Equipment Descriptions and Functions
RL REMOTE ALARM LAMPS SERIES
This series of remote alarm lamps was
designed to offer fast and convenient
identification of any detectors that release
alarms within concealed spaces such as
staterooms, store rooms, lockers, etc. The
RL-30 and RL-40 models are used as remote
individual detector alarm lamps on round or
rectangular switch boxes, respectively. The
RL-6 can accommodate up to four detectors
with one common remote indication. (See Spec
Sheet Catalog No. 8011 and No. 8013.)
5. AUDIBLE ALARMS
ALARM LOCATIONS AND
REQUIREMENTS
Ten inch bells are required to sound in the
following locations when any alarm initiating
device is actuated.
1. Alarm bell must always sound on the bridge
regardless of which zone is in alarm.
2. Alarm bells must sound in the engine room,
machinery spaces, and the control room
when the alarm is initiated in any of these
spaces. In case the control room might be
unattended at the time of alarm, bells must
also be installed in the passageways and
lounge areas of the licensed engineer’s
quarters.
RLP REMOTE LAMP PANELS SERIES
The RLP-4, -8, and -12, with 4, 8, and 12
lamps, respectively, serve the same purpose
as the individual remote alarm lamps, except
that they are mounted on a common panel.
(See Spec Sheet Catalog No. 8012.)
NOTE: If it should be necessary to
supplement the 10 inch bell audible output in
high noise background areas with horns,
sirens, strobes, flashing or rotating lights,
the wiring to such supplementary alarm
devices does not have to be supervised.
However, audible alarms other than bells
must always be accompanied by lights or
strobes.
BT-F and BT-SS Bells
The BT-F and BT-SS are vibrating and single
stroke 10-inch bells. (See Spec. Sheet
Catalog No. 2537.)
3. If an alarm is not acknowledged (silenced or
reset) at the control panel within 2 minutes,
the control panel must automatically cause
the General Alarm to sound.
11
Page 17
Section III — Equipment Descriptions and Functions
*When audible alarms other than required bells
are used, they must be accompanied with a
visual fire signal either incorporated in the horn
enclosure or separate strobes.
12
Any combination of the approved notification
devices can be used, but the combination cannot
be greater than the circuit current of 1.5A.
Page 18
6. INITIATING DEVICES—
AUTOMATIC
Section III — Equipment Descriptions and Functions
DI-3
Ion detector— limit of thirty per zone. (See
Spec Sheet Catalog No. 6119.)
Dl-3IS
This ion detector is for intrinsically safe
applications when used with the ZS-30
module with diode shunt barrier. There is a
limit of ten detectors per zone circuit. (See
Spec Sheet Catalog No. 6119.)
DT-C Series
The DT-135CS and DT-200CS thermal
detectors are the rate compensated type
available in 135° F and 200° F settings. The
DT-135CL and the DT-200CL are identical to
CS versions, except that they have an
internal alarm indicating lamp. There is a
practical limit only to the number per zone.
(See Spec Sheet Catalog No. 6131.)
DT-11 Thermal Detector
The DT-11 is a thermal detector for use in
open areas. It uses the DB-11 low profile
surface mounting base or the DB-3S base
with the DB-ADPT adapter. (See Spec
Sheet Catalog No. 6174.)
DT-135/200 WP
DT-140/190 EP
This explosionproof thermal detector has a
rate compensated principle available in
either a 140° F and 190° F setting. It should
be used in hazardous areas requiring
explosionproof devices. The detector
mounts to an approved explosionproof
junction box. (See Spec Sheet Catalog No.
6128.)
PE-11 Photoelectric Detector
The PE-11 is a photoelectric detector that
responds to a wide range of both flaming
and smoldering fire conditions. It uses the
DB-11 low profile surface mounting base,
the DB-3S base with the DB-ADPT adapter,
or the AD-11P/PR air duct housing. (See
Spec Sheet Catalog No. 6173.)
PE-11T Photoelectric Detector with
Heat Sensor
The PE-11T is a photoelectric detector with
heat sensor that responds to a wide range
of both flaming and smoldering fire conditions. It uses the DB-11 low profile surface
mounting base or the DB-3S base with the
DB-ADPT adapter. (See Spec Sheet Catalog No. 6173.)
This weatherproof thermal detector has a
rate compensated principal available in
either a 135° F or 200° F setting. The detector is epoxy coated and mounts to a weatherproof box for approved use in wet or
unsheltered locations. (See Spec Sheet
Catalog No. 6127.)
13
Page 19
Section III — Equipment Descriptions and Functions
6.1 BASE SEAL for DB-3S or DB-11 BASE
Use the DB-Seal with a DB-3S base or the DB-11 Seal with a DB-11 base to prevent moisture from
condensing and collecting on the rear of the detector used. This moisture can occur when units experience different temperatures or humidity conditions.
INSTALLING the DB-SEAL for DB-3S BASE
(See Figure 4)
All wiring must comply with national and local
codes.
1. Install and wire the DB-3S base by following
the DB-3S Installation Instructions
(P/N 315-083225). Make sure that all wires
are dressed flush to the bottom of the base.
2. Position the tabs on the seal over the slots in
the inner rim of the base and press the seal in
place.
3. Check that the four openings for the spring
contacts clear the springs and the plastic
terminal supports.
4. With the seal in place, install the detector.
5. Follow the checkout procedure in the detector
installation instructions.
INSTALLING the DB-11 SEAL for DB-11 BASE
(See Figure 5)
All wiring must comply with national and
local codes.
1. Install and wire the DB-11 base by following
the DB-11 Installation Instructions
(P/N 315-094193). Make sure that all wires
are dressed flush to the bottom of the base.
2. Place the base seal (1/4" white foam) firmly
into the bottom of the base. Do not cover the
contact springs (See Figure 5.)
3. Rotate the detector counterclockwise while
pressing on it until the detector drops into the
base.
4. Rotate the detector clockwise until it stops
and locks in place.
14
Figure 4
Installing the DB-Seal
Figure 5
Installing the DB-11 Seal
Page 20
7. INITIATING DEVICES — MANUAL
Section III — Equipment Descriptions and Functions
MS-51/501
Manual fire alarm station. Manual stations are
recommended for use with automatic fire
detectors. If a fire is observed before automatic
detector response, the manual activation of the
station results in the same system response as
automatic detection. Manual stations should be
installed throughout the accommodation spaces,
the service spaces, and the control stations.
One manual station should be located at each
exit. The stations should be readily accessible
in the corridors of each deck so that no part of
the corridor is more than 60 feet (20 meters)
from another manual station. (See Spec Sheet
Catalog No. 6183.)
MSM Series
The MSM Series manual stations feature a
rugged diecast metal housing that satisfies
both architectural and code requirements
for manual fire alarm box initiation devices.
The MSM-Series box features keyed reset
using the same key as the control panels.
The MSM Series models are low-profile
with all surfaces either painted or plated to
inhibit corrosion. These boxes have raised
lettering and are shipped with two reset
keys and a break glass rod (use of rod is
optional.) Options include: double action,
institutional, weatherproof, and explosionproof. (See Spec Sheet Catalog No. 6184.)
15
Page 21
SECTION IV
CONTROL PANEL CONFIGURATION
After the type and quantity of modules
required to satisfy a given system are
determined, the arrangement of the modules in the enclosure(s) should be planned.
For consistency, the CP-35 control unit
must always be located in the left side of
the top row, with the PS-35 on the right
side of the row to fill the entire top row.
If the system does not require battery
backup, the remaining modules can be
located as desired, except for the RC-30U,
as the others are not placement sensitive. If
battery backup is to be included, the BC-35
battery charger module must always be
placed to the right side of the second row.
Should one or more BE-35 battery extender
modules be required, they must be placed
to the left of the BC-35. The BE-35 extends
the 25 AH charging capability of the BC-35
by another 25 AH up to a final capability of
more than 100 AH. The MM-35 meter
module should then be placed to the left of
the BC-35 or next to the last BE-35. The
remaining modules can be placed as
desired.
16
Page 22
DETECTOR APPLICATION AND SP ACING
1. SMOKE DETECTORS
SECTION V
1.1 DESCRIPTION AND FUNCTION
Smoke detector is the generic name given
to either ionization type or photoelectric type
detectors. The ionization type responds to
both visible and invisible products of combustion, while the photoelectric type depends on sensing visible smoke.
1.2 SPACING
For average areas with smooth ceilings and
normal air movement, the maximum recommended spacing is 900 square feet or no
more than 30 feet between centers and 15
feet from a sidewall. In areas with higher air
movement, the detector spacing should be
reduced accordingly.
2. THERMAL DETECTORS
2.1 DESCRIPTION AND FUNCTION
All thermal detectors respond only to excessive heat, which is assumed to be generated
from a flaming fire. The detectors are designed with different operating principles as
described below.
1.3 APPLICATION LIMITATIONS
1.3.1 On ceiling heights below 8 feet, the
possibility of unintentional alarms from
tobacco smoke does exist, especially in
areas where people might congregate. It is
recommended that smoke detectors in such
areas have their zones wired through the
RC-30U alarm confirmation module.
1.3.2 Smoke detectors should not be used
in areas where they could be subjected to
steam or moisture condensation such as in
galleys, laundries, etc. Thermal detectors
should be used in such areas.
2.2 SPACING
Maximum approved spacing of thermal detectors
is as follows:
Maximum
Area ProtectedDistance from
Type(Square Feet)Sidewalls (Feet)
2.1.1 Fixed Temperature
The air temperature has to exceed the set
ratings of the devices in order to activate it.
The settings are 135° F, 190° F, and higher
(on special order).
2.1.2 Rate Compensated
This type of thermal detector is similar to the
fixed temperature detector in operation, but is
compensated to eliminate the expected
thermal lag and, therefore, responds faster.
Fixed Temperature (DT-11)625 (25 X 25)12.5
Fixed and
Rate of Rise2500 (50 X 50)25
DT-135 CS, CL, and WP
Rate Compensated2500 (50 X 50)25
DT-200 CS, CL and WP
Rate Compensated2500 (50 X 50)12.5
17
Page 23
Section V — Detector Application and Spacing
3. PLANNING A FIRE DETECTION SYSTEM
When planning a fire detection system, make
a choice of detector based on the kinds of
fires expected. The type and quantity of fuel,
possible ignition sources, ranges of ambient
conditions, and the value of the property to be
protected should all be considered.
In general, heat detectors have the lowest
cost and false alarm rate, but are the slowest
to respond. Since the heat generated by small
fires tends to dissipate fairly rapidly, heat
detectors are best used to protect confined
spaces, or directly over hazards where flaming fires can be expected. They are usually
installed on a grid pattern at their recommended spacing distances or at reduced
spacing for faster response. The operating
temperature of a heat detector should be at
least 25° F above the maximum expected
ambient temperature in the area protected.
Smoke detectors cost more than heat detectors, but respond faster to fires. They are
better suited to protect large open spaces
than heat detectors because smoke does not
dissipate as rapidly as heat does in the same
size space. Smoke detectors are either
installed according to prevailing air current
conditions or on a grid layout.
Photoelectric smoke detectors are best
used in places where wire insulation or
other smoldering fires may be expected.
Ionization smoke detectors are useful
where fire would be expected to develop
into a small flaming condition soon after
pyrolysis.
Flame detectors offer extremely fast response, but warn of any source of radiation
in their sensitivity range. False alarm rates
can be high if this kind of detector is improperly applied. Because flame detectors
are “line of sight” devices, care must be
taken to ensure that they can see the entire
protected area and that they will not be
accidentally blocked by stacked material or
equipment. Their sensitivity is a function of
flame size and distance from the detector.
Although fairly expensive, they are wellsuited to protect areas where explosive or
flammable vapors or dusts are encountered
because they are usually available in
explosionproof housings or have intrinsically safe ratings.
NFPA 72 Annex A (2002 Edition) has more
specific information on the installation of the
various types of detectors.
18
Page 24
Section V — Detector Application and Spacing
3.1 DETECTOR APPLICATION
In view of the problems that can be expected with the misapplication and location of detection devices
aboard ship, the guidelines below should be followed when designing systems.
These tables list situations where the use of smoke detectors, ionization and photoelectric should be
avoided.
MOISTURE
Salt water sprayHeat treating
Corrosive atmospheresDust or lint
Water spraySawing, drilling and grinding
Live steamPneumatic transport
Steam tables
Showers
Humidifiers
Slop sinks
Humid outside air
Excessive tobacco smoke
COMBUSTION PRODUCTS AND FUMES
Cooking equipmentEngine exhaust
OvensGasoline forklift trucks
DryersDiesel trucks and locomotives
Exhaust hoodsEngines not vented to the outside
Metal cuttingWelding and brazing
MachiningHeating element, abnormal
Paint sprayDust accumulation
CuringImproper exhaust systems
Chemical fumesIncomplete combustion
Cleaning fluids
Conventional photoelectric/ionization detectors shall not be installed in cargo holds and
RO/RO spaces.
NOTE: Conventional weatherproof thermal detectors DT-135WP/DT-200WP must be
used in cargo holds and RO/RO spaces.
19
Page 25
Section V — Detector Application and Spacing
Areas to be ProtectedMonitoring Machinery Spaces
— ACCOMMODATION SPACES (ION,
PHOTO)
Halls, dining rooms, lounges, and other
areas of this type with permanent walls,
corridors, sanitation facilities, cabins,
offices, infirmaries, and leisure rooms not
containing cooking appliances.
— SERVICE AREAS (ION, PHOTO,TEMP)
Service cabinets, radio rooms,
strongrooms, stores, workshops other
than machinery spaces, and similar
areas, including shafts going to them,
as well as life-vest storage areas.
— SPECIAL AREAS (ION, PHOTO, TEMP)
Closed areas for transport of special
materials.
— SAFETY STATIONS (ION, PHOTO,
TEMP)
Areas housing the radio equipment, major
navigation equipment, standby
generator and central installations.
— MACHINERY SPACES (ION, PHOTO,
TEMP)
Areas housing the propulsion unit,
boilers, liquid-fuel handling units,
stabilization equipment, ventilation and
air conditioning equipment, and similar
areas, including the shafts running to them.
Because of the irregular shape of most
machinery spaces and the strong air
currents present, the number and type of
detectors used cannot be based on the
area protected, as is in the common
practice on land-based installations and
ship accommodation spaces. The best
design approach is to pick out all potential
fire outbreak areas and place a fire detector
above each of them at deck level. Areas of
potential fire risk include the following:
—Auxiliary boiler front
—Main boiler front
—Fuel oil pressure pumps
—Auxiliary generator sets
—Main diesel engine fuel oil pumps
and injectors
—Fuel oil purifiers
—Lubricating oil purifiers
—Fuel oil transfer pumps
—Workshops
—Electrical switchboards
—Storerooms
Locate additional detectors with fairly wide
spacing to give general cover to areas not
containing special risk.
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4. DETECTOR INSTALLATION
Section V — Detector Application and Spacing
After the most suitable detector for the job
is selected, the location of the detector
within the space to be protected should be
considered.
Spot type detectors are usually located on
the ceiling or side wall with the edge of the
detector located no closer than 4 inches
from the wall or ceiling. When heat detectors are installed at their listed spacing,
detection times are approximately equivalent to the operating time of standard 165° F
link-and-lever sprinklers. If faster response
is desired, reduce detector spacing. Also,
where ceiling heights exceed 16 feet, or
where ceiling construction is not smooth,
reduce spacings accordingly. Specific
information on the treatment of joisted,
beamed, and sloped ceilings can be found
in Annex A of NFPA 72 (2002 Edition).
When installing any type of heat detector,
consideration should be given to sources
of heat within the protected space which
might cause false alarms. For example,
locate heat detectors away from unit
heaters and ovens where surges of hot air
might be expected.
The installation of smoke detectors is more
critical than for heat detectors because
smoke transport is strongly influenced by
the convective air flow patterns within the
protected area. For this reason, smoke
detectors are not assigned a listed spacing
by the testing laboratories other than a
maximum area coverage of 900 square feet
per detector. Although a grid pattern can be
used as a starting point, care must be taken
to appropriately locate the heating supply
registers and return air registers. Smoke
detectors should be located away from
turbulence caused by hot air outlets. The
location of the smoke detectors should favor
return air because the return air draws
smoke toward the detector and because air
velocity at the return tends to be lower.
Smoke stratification also should be considered when smoke detectors are installed.
Smoke may stratify below a ceiling due to
temperature gradients or air flow along the
ceiling. When stratification is a possibility,
smoke detectors can be installed with alternate detectors at different levels.
The installation of ionization type detectors is
similar to that of smoke detectors since fire
gases tend to flow with smoke and are
similarly affected by convected flows within
the protected space. They also must be
located away from sources of oxidizable
gases or vapors; for example, away from
substances like aerosol sprays or hydrocarbon solvents, as these substances could
cause false alarms.
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Section V — Detector Application and Spacing
5. SYSTEM MAINTENANCE AND TESTING
All fire detection systems should be
periodically tested in a manner that ensures
at least one annual check of all associated
detectors and devices. The most effective
way to perform this system test is to check
one-twelfth of the number of initiating
devices monthly. This results in an automatic monthly test of the control panel,
alarm devices, and other associated
equipment.
More than just testing detectors for alarm
release, ionization and photoelectric-type
detectors should have their sensitivity
settings measured to assure a proper
range. All types of detectors should be
cleaned whenever there is evidence of dirt
or other contamination.
The System 3 Control Panel from Siemens
Industry, Inc. incorporates automatic
supervision of any open circuit or ground
fault in all external wiring. Either condition
results in a system audible and visual
trouble signal. Open circuits are further
identified by the LED on either the zone or
the audible alarm module in which they
exist. A ground fault, in addition to initiating
a system trouble, identifies itself with its own
indicating LED. To locate and correct the
ground fault, each external circuit is systematically opened until the fault signal is
cleared. The ground is then found in that
particular circuit.
System 3 zone modules (ZU-35TSs) include
manual momentary contact zone alarm and
zone trouble test switches that simulate an
alarm or trouble condition when actuated.
However, this type of testing does not
assure proper detector performances and
does not serve that purpose.
For more detailed troubleshooting and
maintenance information, refer to the
System 3 Installation and Maintenance
Manual, P/N 315-085063. For service
assistance, call the Siemens Industry, Inc.
offices or Authorized Distributor listings
found in the Yellow Pages.
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SECTION VI
POWER CALCULATIONS
1. POWER CALCULATION SHEET
The Power Calculation Sheet on the following page lists the
supervisory and alarm current requirements of the System 3
equipment and modules and can be used to determine the
power needs of a specific system configuration.
1 — Includes the CP-35 audible circuit.
2 — Use the highest number of relays that will be operated when either a) any three zones, or b) 10%
of the total zones are in alarm.
3 — Only when switch is operated.
4 — All zones must have supervisory current calculated.
5 — Minimum of three zones or 10% of total zones must be calculated.
In zones with shorting devices (thermals, MSs, etc.), add 120mA.
7 — Notification appliance alarm current draw.
8 — Total alarm current cannot exceed 10A when using the PS-35.
8
6
7
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Page 30
2. DETERMINING CURRENT REQUIREMENTS FOR A
GIVEN SYSTEM CONFIGURATION
Section VI — Power Calculations
a. Following the format of the Power
Calculation Sheet above, list the
correct quantity for each type of
equipment included.
b. Multiply the supervisory and alarm
currents shown for each item by the
number of modules included, and list
the total module alarm currents in the
appropriate columns.
c. Add the two columns and record the
subtotals where indicated (a and b).
3. BATTERY BACKUP POWER
d. The current requirements of the
audible devices must also be calculated, based on number and type used.
Fill Blank c in with the amount of
current needed for the audible
devices included.
e. Add the current subtotals (a and b) to
the audible devices current requirements (c) to obtain the TOTAL current
necessary for the system. Enter that
amount opposite TOTAL.
The US Coast Guard requires that two
sources of power be available to the smoke
detection system. Usually this will be the main
and standby generators. Present requirements
for battery power as a second source call
for 36 hours for passenger ships and 18 hours
for all other ships. When battery backup is
optionally used in addition to main and
standby generators, there is no operation
time requirement, but 18 hours would be
recommended.
System 3 equipment includes two compatible
battery modules:
Batteries of 28 AH are also compatible with
System 3 systems, Model No. BTX-1. (See
Spec Sheet Catalog No. 3361.)
The following battery load curves show
alarm and supervisory current available
from 5 AH, 10 AH, and 28 AH batteries for
24 hour supervisory current and 5 minute
alarm current capabilities. The supervisory
current is represented on the vertical axis in
milliamps, and the alarm current, on the
horizontal axis in amps.
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Page 31
Section VI — Power Calculations
Supervisory Current (mA)
CHART A
5 AH Rated Capacity at 20 Hour Rate
Allowable Supervisory and Alarm Currents
For Standby Periods of 18 Hours and 36 Hours
Alarm Duration 5 Minutes
10 AH Rated Capacity at 20 Hour Rate
Supervisory Current (mA)
Alarm Current (Amps)
CHART B
Allowable Supervisory and Alarm Currents
For Standby Periods of 18 Hours and 36 Hours
Alarm Duration 5 Minutes
26
Alarm Current (Amps)
Page 32
Section VI — Power Calculations
CHART C
28 AH Rated Capacity at 20 Hour Rate
Allowable Supervisory and Alarm Currents
For Standby Periods of 18 Hours and 36 Hours
Alarm Duration 5 Minutes
Supervisory Current (mA)
Alarm Current (Amps)
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Page 33
Section VI — Power Calculations
4. DETERMINING BATTERY SIZE NECESSARY
FOR BACKUP POWER
a. Select the graph on Charts A, B, or C
that seems most appropriate for the
system configuration. Select the
correct battery curve, depending upon
whether the battery is needed for a
passenger ship (36 hours of battery
operation) or any other type of ship (18
hours).
b. Mark the needed supervisory current on
the Y- axis and draw a straight line
parallel to the X-axis between the point
marked and the appropriate curve of
the battery being considered.
c. Mark the needed alarm current on the X-axis
and draw a line parallel to the Y-axis between
that point and the appropriate curve of the
battery being considered.
d. If the intersection of these two lines falls
within the battery curve, that battery capacity
is sufficient to handle the system.
e. If the intersection point falls above the curve
or near the center of the curve, repeat the
calculations on the curve of either a larger or
smaller battery, as necessary, until the
necessary battery capacity is found.
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Page 34
APPENDIX
A.COAST GUARD SYSTEM 3 TYPICAL DRAWINGDrawing No. 315-085585
NOTE: When designing Fire Control Systems for various types of vessels, the designer should be
aware of the required vessel type, domestic and SOLAS regulations applicable for that vessel.
Typical Large System 3™ Control Panel
System Configurations
A. Compliance with Safety of Life at Sea (SOLAS) using USCG Approved Equipment.
POWER – Although the required two sources of power are available from the main and standby
B.
generators, optional short term battery backup is also acceptable. The BC-35 Battery Charger
Module, the MM-35 Meter Module, and the BK-33 9 AH Battery Module serve this purpose.
ZONES – Fourteen smoke detection zones with manual stations included. The seven ZU-35TS modules
C.
satisfy this requirement. One intrinsically safe zone requires ion detectors, supervised automatic damper release, along with its own distinctive audible signal immediately outside the
area. The ZS-30 intrinsically safe zone module, the RM-30U release module, and the AE-30U
(no. 2) alarm extender module serve this purpose.
AUDIBLE ALARMS –
D.
1.It is specified that bells are pulsed in order to distinguish fire signals from steady bells of the
emergency alarms. The MC-30 Master Code Module does this.
2.The SOLAS requirement of sounding bells in the crews spaces if the alarm signals at the
control panel have not received attention within 2 minutes is satisfied by the TL-30U Time
Limit Module and the AE-30U (no. 1) Alarm Extender Module.
SUPPLEMENTARY CONTROL –
E.
Each of the fourteen zones has its separate AC unit which is to be shutdown upon alarm. The
three SR-32 modules serve this purpose. The SR-30 or SR-35 Relay Modules can also be used
for similar control functions.
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Page 41
Typical Small System 3™ Control Panel
System Configurations
This small cruise ship requires six zones to cover the accommodation spaces. The low deck heights of 7 feet 3
inches increases the possibility of smoke detectors alarming to tobacco smoke. The use of the RC-30U
confirmation module will tend to eliminate this concern by not reporting, but recording first alarm and
requiring the device to alarm a second time within a time frame adjustable to 1 minute, as this alarm confirmation results in an alarm delay. In the event of a true fire, it would be undesireable to have manual station
activation so delayed. Therefore, the manual stations are connected to their own ZU-35TS Zone Modules not
under the influence of the RC-30U.
* These maximum recommended spacings are based on smooth ceilings and moderate air flow. In other cases
detector spacing should be shortened accordingly. Refer to NFPA 72 Annex A (2002 Edition) for guidance.
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Maximum Number of Devices per Circuit
Ion detectors — 30 in any combination, plus any number of heat or manual stations, except for intrinsically
safe circuits (see Note on page 30 for intrinsically safe zone module regarding the number of DI-3IS detectors
allowed per zone).
Heat and manual station — only practical limitations.
Alarm circuits limited to 1.5A
NOTES:
1. These Typical control panels show external wiring connections only for customized module wiring. Refer to the respective
wire list and the appropriate specification sheets as shown in the Marine Fire Detection System Manual.
2. For proper wiring connections to the various approved detectors and notification appliances refer to the Marine Manual.
3. Refer to the Marine Manual for additional details.
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Page 42
7. Previously Listed Equipment
Model No. Part No.DescriptionCatalog No.
ZB-35500-890065Linear beam Module3110
EL-32500-621297EOL Device ---
BACW-6500-688442Polarized Bell 6" 120 VAC2515
BACW-10500-688443Polarized Bell 10" 120 VAC2515
MBDC-6500-6884486" 24 VDC Motor Bell2513
MBDC-10500-68844910" 24 VDC Motor Bell2513
MT500-693130Multitone Signal2521
MT4500-693131Multitone Signal2521
(4" Sq. Electrical Box)
MTS15/75500-69313415/75CD Non Sleeping, Clg & Wall2521
MTS4-15/75500-69313515/75CD Non Sleeping, Clg & Wall2521