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Transcript of Fire Alarm Installers Manual
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Fire Alarm Installer’s
Installation Guide
For consistent, reliable installations
c 2008 Daniel Larson
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Table of Contents
Section 1:
Wall Mounted Back Boxes for; - Flush mounted devices
Manual Pull StationsHorns and StrobesSpeakers and Strobes
ModulesDuct Detector Test/Reset Switches or Alarm LED
Annunciators
Section 2:
Back box conduit stub-ups for; - Flush mounted devices
Horns, Horn/Strobes, Speakers, Speaker/Strobes
Manual Pull Stations
Section 3:
Wall penetrations
Sheet rock extended to the hard deckSheet rock to just above ceiling
Fire rated walls
Sleeves
Section 4:
Fastening to steel
Steel beams, trusses, and columns
Section 5:
Ceiling Mounted Device Back Boxes
T-Bar mounted back boxes
Hard lid mounted back boxes
Section 6:
Fire Sprinkler Riser and OS&Y
Riser and OS&Y
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Section 7:
Cut-in Boxes
Sheet rock extend to just above ceiling
Sheet rock extends to deck
Section 8:
Wiring Methods (Securing to steel)
Horizontal wire run on split trussPerpendicular wire run to mounted box
90 degrees to horizontal wire run
Securing to steel shelf or lip
Section 9:
Wiring Methods (Securing to wood)Horizontal wire runs
Section 10:
Wire protection
Basic wire protection in metal raceway
Section 11:
Labeling circuits and terminations
Section 12:
Fire panel lay-outs
Large systems w/voice
Large systems Medium systems
Smaller systems
Section 13:
Do’s and Don’ts
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SECTION 1
Wall Mounted Back Boxes for; Flush mounted devices
Manual Pull Stations
Specifications:
Standard 4” X 4” - Steel Junction Box or 4” X 4” – Steel Junction Box w/ Bracket¾” knock-outs on boxesMount 48” to center A.F.F.
Single Gang Mud Ring – extension varies
Figure 1A - Illustrates the proper hardware for mounting the back boxes to either steel or wood
studs.
Figure 1A
Figure 1B: Illustrates the proper positioning and mounting of the back boxes to the 2”X 4” studs.
The actual mounting height is 48” AFF to the center of the device, or the center of the
mechanism.
Figure 1B: CAD Symbols;
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Horns and Strobes
Specifications:Standard 4” X 4” - Steel Junction Box or 4” X 4” – Steel Junction Box w/ Bracket
¾” knock-outs on boxes
Mount 84” to center A.F.FDouble Gang Mud Ring – extension varies
Figure 1C - Illustrates the recommended hardware used to mount the Horns and Horn/Strobes.Both the Gentex and System Sensor products can also be mounted to 4” X 4” extension rings and
single gang mud rings however; the double gang mud ring is our standard.
Figure 1C:
. Figure 1D - Illustrates the proper positioning and mounting of the back boxes to the 2”X 4”studs. The mounting height is 84” AFF to the center of the device. NFPA allows for some
variances depending on the notification appliance, for consistency we use 84” AFF as our
standard
Mount84” AFF Mount84” AFF
Figure 1D:CAD Symbols; H/S H S
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Speakers and Strobes
Specifications:
Standard 4” X 4” - Steel Junction Box or 4” X 4” – Steel Junction Box w/ Bracket
¾” knock-outs on boxesMount 84” to center A.F.F
Extension Ring – 1 ½ ”or 2 ½” extension
Figure 1E - Illustrates the hardware used to mount Speakers and Speaker/Strobes. The back of
the speakers on both; the Gentex and System Sensor product, have a portion of the speaker that
protrudes into the back box.
Figure 1E
Figure 1F - Illustrates the proper positioning and mounting of the back boxes to the 2”X 4” studs.
The mounting height is 84” AFF to the center of the device. NFPA allows for some variances
depending on the notification appliance, for consistency we use 84” AFF as our standard
Figure 1F CAD Symbols; SP/S SPS S
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Modules
Specifications:
Standard 4” X 4” - Steel Junction Box or 4” X 4” – Steel Junction Box w/ Bracket¾” knock-outs on boxes
Mount 48” to center A.F.F (May vary – refer to plans)Extension Ring – 1 ½ ”or 2 ½” extension
Figure 1G - Illustrates the proper hardware for mounting the back boxes to either steel or wood
studs.
Figure 1G
Figure 1H - Illustrates the proper positioning and mounting of the back boxes to the 2”X 4”
studs. The actual mounting height is 48” AFF to the center of the device, this may vary, check
plans.
Figure 1H CAD Symbols; AIM ARMM C
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Duct Detector Test/Reset Switches or Alarm LED
Specifications:
Standard 4” X 4” - Steel Junction Box or 4” X 4” – Steel Junction Box w/ Bracket¾” knock-outs on boxes
Mount 48” to center A.F.F.Single Gang Mud Ring – extension varies
Figure 1J - Illustrates the proper hardware for mounting the back boxes to either steel or wood
studs.
Figure 1J
Figure 1K - Illustrates the proper positioning and mounting of the back boxes to the 2”X 4”
studs. The actual mounting height is 48” AFF to the center of the device, this may vary, check
plans.
Figure 1K CAD Symbols; DT DLDuct Test Duct LED
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Annunciators Specifications:
Standard 4” X 4” - Steel Junction Box or 4” X 4” – Steel Junction Box w/ Bracket
¾” knock-outs on boxesMount 50” to center A.F.F.
Single Gang Mud Ring – extension varies(Note: The annuciators’ back box is supplied by the manufacture and can be flush or surfacemounted, using the manufactures trim-ring we surface mount to the flush assembly specified
below.)
Figure 1L - Illustrates the proper hardware for mounting the back boxes to either steel or woodstuds.
Figure 1L
Figure 1M - Illustrates the proper positioning and mounting of the back boxes to the 2”X 4”
studs. The actual mounting height is 50” AFF to the center of the device; this may vary, and
check plans for special ADA regulations.
Figure 1M CAD Symbols; FAA Annunciator
50
50
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SECTION 2
Back box conduit stub-up assemblies
Back boxes mounted at 84” AFF
Specifications: Non- Fire Rated Walls, dropped ceiling (sheet rock does not extend to deck)Back box assemblies mounted at 84” AFF
¾” insulated box connectors
¾” EMT stubbed up no less than 4” above top of sheet rock¾” EMT bushing on end of stub-up
Types of devices; Horns, Horn/Strobes, Strobes, Speakers, and Speaker/Strobes
(Note: In some cases additional brackets may be required to secure the conduit.)
Figure 2A – Illustrates the EMT stub-up assembly from the mounted device box to above the
ceiling line. We established this standard for three main reasons; to protect our conductors and
prevent ground faults caused by careless sheet-rockers, ease of replacing or adding conductors,we can still install our conductors after the sheetrock is in place.
Above Ceiling
EMT Bushing
84” To Center AFF
3/4” EMT Conduit
3/4” EMT Insulated Connector 3/4” EMT Insulated Connector
secure w/ 3/4” single screw strapBracket mounted 1’ above JBox
Finished Floor
secure w/ 3/4” single screw strapBracket mounted 1’ above JBox
3/4” EMT Conduit
EMT Bushing
Figure 2A
(The type of mud rings will vary for the type of device being installed; a double gang is used in
this illustration.)
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Back boxes mounted at 48” AFF
Specifications: Non- Fire Rated Walls, dropped ceiling (sheet rock does not extend to deck)
Back box assemblies mounted at 48” AFF¾” insulated box connectors¾” EMT stubbed up no less than 4” above top of sheet rock
¾” EMT bushing on end of stub-up
Types of devices; Manual Pull Stations, Modules, and Duct Test Switches
(Note: In some cases additional brackets may be required to secure the conduit.)
Figure 2B – Illustrates the EMT stub-up assembly from the mounted device box to above the
ceiling line. Again we established this standard for three main reasons; to protect our conductorsand prevent ground faults caused by careless sheet-rockers, ease of replacing or adding
conductors, we can still install our conductors after the sheetrock is in place.
Above Ceiling
EMT Bushing
48” To Center AFF
3/4” EMT Conduit
3/4” EMT Insulated Connector 3/4” EMT Insulated Connector
secure w/ 3/4” single screw strapBracket mounted 1’ above JBox
Finished Floor
secure w/ 3/4” single screw strapBracket mounted 1’ above JBox
3/4” EMT Conduit
EMT Bushing
Figure 2B
(The type of mud rings will vary for the type of device being installed; a double gang is used inthis illustration.)
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Perimeter Door Back boxes mounted at 48”and 84” AFF
Specifications:
Non- Fire Rated Walls, dropped ceiling (sheet rock does not extend to deck)Back box assemblies mounted at 48” and 84” AFF
¾” insulated box connectors¾” EMT stubbed up no less than 4” above top of sheet rock¾” EMT bushing on end of stub-up
Types of devices; Manual Pull Stations, and Notification devices
Figure 2C – Illustrates the EMT stub-up assembly from the mounted device box to above theceiling line. This configuration is usually used at perimeter door locations, where we have a
Notification appliance mounted above a Manual Pull Station.
Above Ceiling
48” To Center AFF
Finished Floor
84” To Center AFF
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SECTION 3
Wall Penetrations
Sheet rocked to deck:
Drawing 99A
5/8 ” Sheetrock
Penetration
In this illustration the sheet rock extends to the deck or roof, the penetration will be just abovethe ceiling. A 90 degree bend in the conduit will penetrate the sheet rock just above the ceiling.A conduit cap is place on the end of the conduit to protect the wire.
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Sheet rocked to just above ceiling:
Drawing 99B
5/8” Sheet rock
In this illustration the sheet rock extends to just above the ceiling, the conduit will extend to just
above the sheet rock. A conduit cap is placed on the end of the conduit to protect the wire.
Always check the plans or check with the GC to make certain that the sheet rock will not extendto the deck.
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2 hr. rated fire wall- sheet rock to deck:
2X 5/8” Sheet rock
5/8” Sheet rock
Drawing 99C
In this illustration one side of the wall is a 2 hr. rated fire wall, the sheet rock is 1 ¼” thick which
extents to the deck. It also has a hard lid drop ceiling. The other side of the wall has 5/8” sheet
rock to the deck, and has a T-bar drop ceiling. You will want to have the conduit penetrate on the
T-bar ceiling side of the wall. This allow to easy access for the wire run.
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Horizontal wall penetrations:
Drawing 99D
This illustration shows a couple of different wall penetrations, always use a sleeve. A sleeve is a
short piece of conduit.
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SECTION 4
Securing Back Boxes to Steel
Fastening to steel
Split Truss - Use 4” X 1/4”
or #20 Toggle BoltsSteel Beams - Use Appropriate
Beam Clamps
“I” Column Round ColumnSecure channel-strut to column, secure boxes to channel-strut.
These illustrations show different ways to secure your boxes to steel columns, trusses, and
beams.
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SECTION 5
Ceiling Mounted Back Boxes
Horn/strobes, smoke and heat detectors, duct detector indicator LEDs.
12 ga. support wire
T-Bar Grid
T-Bar Bracket
4” X 4” Jbox
3” O Mud ring
4” X 4” Jbox3” O Mud ring
2” X 4”Steel Studs
24” Adjustable Bracket
Drawing 112
Note: This procedure is the same for wood studs.
These illustrations show how to secure your boxes to either T-bar or studs for the appropriateceiling type. As noted the studs can be either steel or wood.
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SECTION 6
Fire Sprinkler Device Boxes
Drawing 130
Fire Sprinkler Riser
Outside Stem and Yolk
Weatherproof doublegang box
Liquid tight 3/4”flex conduit
Butterfly Valve
Single gang box Aluminum flex
Water flow switch
3/4” EMT
Box Offset
Box Offset
Note: If the Fire sprinkler riser is outside, use weatherproof boxes and flex.
These illustration show the basic raceway configurations for monitoring the fire sprinklersystem. Always make sure you flex to the device is positioned at the bottom of your box.
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SECTION 7
Cut-in boxesSheet rock to just above ceiling:
Drawing 200
In many cases it will be necessary to install a device in a finished wall; in this situation we willuse a “cut-in” box or “old work” box. We will use aluminum flex for our raceway. In the
illustration above the sheet rock only extends above the ceiling line, making it easy to secure theflex to an adjustable bracket.
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Drawing 201
When the box is installed and secured in the wall we will trim and secure the flex to theadjustable bracket above the ceiling as shown in this illustration.
Sheet rock up to deck:
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Drawing 202
In many cases the sheet rock will extend to the hard deck or ceiling, in this case we will need to
use two cut-in boxes. The tricky part here is that we do not want to leave a large loop of flex in
the wall. This means when we trim the flex for the second box we will be working very close tothe wall. Ideally we should not leave more than a 4” to 6” loop in the wall. The excess flex in the
wall makes it tricky to pull the wire, but it can be done.
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Drawing 203
In this illustration we have trimmed our flex and installed our cut-in boxes in the wall.
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SECTION 8
Wiring Methods (Securing to Steel)
This section illustrates how to use tie wraps to secure your wire. These methods will eliminate
ground faults caused by the insulation being worn or damaged on the metal beams, trusses, andcross members.
In this illustration the fire cable is tie-wrapped to the tie-wrap going around the beam.
Drawing 182
Truss Tie Wrap
Split Steel Truss
Fire CableTie Wrap
Never tie wrap the cable directly to any metal object, metal expand and constricts with the
changes in temperature, this will eventually wear through the jacket of you cable creating groundfaults.
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The illustration below shows the wire run being directed down through the split truss where adevice box will be mounted. The wire is tied in such a manner as to be up off the metal edge.
Drawing 183
Ground faults are very labor intensive and can be very costly, secure your wire runs properly.
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This illustration show how to create a 90 degree turn in your wire run. Notice that the wire doesnot touch the metal edge of the split beam.
Fire Cable
90 degree
Beam Tie Wraps
Cable Tie Wraps
Drawing 184
The simple procedures shown in this section for tie wrapping your wire runs will save you time
and ensure a quality installation.
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In this illustration we have a metal tray usually found in a building to support the walls and a perfect place to run your wire. Here we a showing how to secure your wire with clips, notice that
we use two tie wraps, one around the clip and then one around the wire. The wire is not tied
directly to the metal.
Drawing 187
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SECTION 9
Wiring Methods (Securing to Wood)
Large, Insulated
Romex Staple
J-Hook
These illustrations show two acceptable ways of securing you wire runs to wood.
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SECTION 10
Wire Protection
Knock-out Bushing
Knock-out Bushing
Insulated Connector
EMT Cap
Connector Cap
Non-insulated Connector
Drawing 300
It is always important to protect you wire from sharp edges, in these example we are protectingour wire from our raceway. Each of the devices shown are inexpensive, easy to install, and will
always be used.
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SECTION 11
Labeling Circuits and TerminationsShrink wrapped labels
Shrink-wrap
In this illustration we are labeling the circuits. See table on page 32 for labeling codes.
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Nylon Labels
Nylon Label
O - S
L C
- 1
- 2
In this illustration we are labeling the circuits. See table on page 32 for labeling codes.
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These tables are to establish consistency.
Label Identification Codes:
Code Code Code
PNL Panel IDC Indicating Circuit H/S Horn and Strobe CombinationPS Power Booster SBS S Bus S Strobe Only
VIP Voice Amplifier VBS Voice Bus SP/S Speaker and Strobe Combination
NAC Notification Circuit XPNL Expander Panel SP Speaker Only
SLC Signal Line Circuit Node Networked Panel ANN Annunciator
I IN O Out
Device Labeling
Sample: Device Label
Circuit Device No.
PS1-1-1 PS 1 1 1
The sample above indicates a notification device on "Power Booster 1", "Circuit 1", and it is "Device 1".
Sample: Device Label Circuit Device No.
SLC-1-1 SLC 1 1
The sample above indicates "Single Line Circuit 1", "Device 1". The Circuit ID. Is not used.
Circuit Labeling
Sample: Circuit Label
Source Code Circuit
I-NAC-1-PNL NAC 1
O-NAC-1-2 NAC 1
The sample above indicates the in and out circuits at a notification device. The "In" pair is from the Panel, Notification Circuit 1. The "Out" pair goes
to Device 2.
"I" In
"O" Out
In-Orgin / Out-Destination
PNL
2
Output Orgin
Output Orgin
Description
Input or Output
Description
Description Description Description
BLACK BROWN DK. BLUE DK.PURPLE RED ORANGE LT. BLUE LT. PURPLE YELLOW WHITE
The darker wire ina pair is the "Negative" ( - ), The lighter wire ina pair is the "Positive" ( + )
Example: In a normal cable pair wehave a Black conductor ( - ) and a Red conductor ( + )
DARK---------------------------------------------------------------------------------------------------------------------------------------------------------------------------LIGHT
( - ) ( + )
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SECTION 12
Fire Alarm Panel Layouts
Fire Alarm w/ Voice Evacuation
Foot print - 8’ h X 6-1/2’w
Gutter- 24” X 4” X 4”
Drawing 80
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Large Fire Alarm System
Foot print - 8’ h X 4-1/2’w
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Medium Fire Alarm System
Foot print- 8’ h X 4-1/2”w
Drawing 82
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Drawing 83
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SECTION 13
Don’ts
1. Never secure our wire runs to other trades hanging supports or conduit.
2. Never penetrate a wall with out a sleeve.
3.
Never mount a device without a back box.4. Never secure your wire runs directly to metal.5. Never pull your wire into a box without the appropriate protection.
6. Never splice your wire runs in the field.
7. Never pull your wire runs on a diagonal.
Do’s
1. For surface mounted devices, always run your conduit stub-up to above the ceiling or to
the height of you horizontal run.
2.
Always check the plans or with the GC for the thickness of the sheet rock being used.3. Always use the appropriate mud rings on your boxes.
4. Always refer to the Fire plans before starting your project.