1500 Central Park Commons Dr - Hy-Vee Grease Duct Manual Non-Welded Double Wall Grease Duct/Type HT Chimney Systems
Installation, Operation, and Maintenance Manual
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SAFETY I
TWO ,MAJOR--CAUSES flF_GREASE DUCT RELATED FIRES :(I} FAILUREi-, MAINTAINREQUIRED'
;CLEARANCE:{AIR SPACE]-0 COMBUSTIBLE MATERIALS AND(2}EAILt RE TO CLEAN GREASE:LADEN.,,",
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DUCTS IT 1S :O,F UTMOST IMPORTANCE-THAT;.THIS GREASE DUCT.BE II�ISTALLEfI"ONLY;IN
ACCORDANCE WITH THESE INSTRUCTIONS: -DO NOT INSTALL_GREASE I3UCT 11YITHOI,T FIRST
{READING THESE INSTRUCTIONS VERY CAREFULLY -
A MAJOR CAISE OF CHIMNEY RELATED--F RE S FAILURE 1 Q MAIN"CA{N IZIQUiRED CLEARANCES-,
(AIR SPACES 7O COMBUSTIBLE MATERIALS Ii.IS OE UTMOST 1'MPOR't'ANCIi:'fHAf THIS CHIMNEY-BE
ANSTALLED;QNLY IN ACCORDANCE WITH THESE INSTRUj:-t = -
ThES.grease duc#js_ETL Its#edto s tandards UL 197 t-LIL2?_2 IASTM E2336 and`AC101, grease
duct:installed per these instructions meets#hie requirements of NAPA 96.
Factory bn�It°ch�rnney is LJL I�stei to standards [1L1€f3 8�UL103 HT and.Ind�cates,conforcnance
to tlie;Ganadian Standards GANtULC=SI29-M87& ULCIORD-0959-1993
Grease duct4& Chi>nney systemsnstaliedn accordance wi#h #fese installation in
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wd1 compty rnri th national safety standards ancl_bullding cones = __
A0018672
March 2015 Rev.13
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TABLE OF CONTENTS
WARRANTY.................................................................................................................................................3
LISTINGS.....................................................................................................................................................4
CLASSIFICATIONS......................................................................................................................................4
APPLICATION..............................................................................................................................................4
CLEARANCES.............................................................................................................................................6
MECHANICAL.............................................................................................................................................7
JointSealant............................................................................................................................................8
SealantFeatures..................................................................................................................................8
Table2—Sealant Usage Chart.............................................................................................................8
GreaseDuct& Chimney Joint Assembly...................................................................................................9
Adjustable Duct, Chimney&Transition Connection ................................................................................ 10
Adjustable Duct, Chimney Standard Installation...................................................................................... 11
Risers— Factory& Field (Bolted) Risers .................................................................................................13
DuctDrains............................................................................................................................................ 14
ManifoldTee .......................................................................................................................................... 14
AccessDoor(Tee Cap)Assembly.......................................................................................................... 15
FanAdapter Plate .................................................................................................................................. 16
ChimneyAdapter Plate........................................................................................................................... 16
Prevention of Grease Accumulation in Horizontal Grease Duct............................................................... 16
Alignment & Bracing of Grease Duct....................................................................................................... 17
Horizontal Support& Support Spacing................................................................................................ 17
Vertical Support&Vertical Support Spacing....................................................................................... 19
Through Penetration & Fire Stops...........................................................................................................27
AnnularDistance—Fire Stop..............................................................................................................27
Annular Distance-2R Type HT Clearance.........................................................................................28
Floor& Ceiling Fire Stop Installation...................................................................................................29
WallFire Stop Installation...................................................................................................................30
Grease Duct Assembly Examples...........................................................................................................31
METHODS USED TO TEST DUCT AFTER ASSEMBLY............................................................................36
Method 1 —Light Test per IMC 506.3.3.1 ................................................................................................36
Method2—Smoke Test..........................................................................................................................36
GENERALDUCT WEIGHTS......................................................................................................................36
Weight—DW-2R....................................................................................................................................36
Weight—DW-3R....................................................................................................................................36
Weight—DW-3Z.....................................................................................................................................36
Weight—Example..................................................................................................................................36
CLEANING & MAINTENANCE RECORD ...................................................................................................40
2
s WARRANTY
This ductwork& chimney systems are warranted to be free from defects in material and workmanship, under
normal use and service,for a period of 12 months from the date of shipment. This warranty shall not apply if:
1. The equipment is not installed by a qualified installer per the MANUFACTURER'S installation
instructions shipped with this product (this guide should be kept.with the equipment once installation
is complete),
2. The equipment is not installed in accordance with federal, state and local codes and regulations.
3. The equipment is misused or neglected.
4. The equipment is not operated within its published capacity.
5. The invoice is not paid within the terms of the sales agreement.
The MANUFACTURER shall not be liable for incidental and consequential losses and damages potentially
attributable to malfunctioning equipment. Should any part of the equipment prove to be defective in material
or workmanship within the 12-month warranty period, upon examination by the MANUFACTURER, such
parts will be repaired or replaced by the MANUFACTURER at no charge. The BUYER shall pay all labor
costs incurred in connection with such repair or replacement. Equipment shall not be returned without
MANUFACTURER'S prior authorization and all returned equipment shall be shipped by the BUYER, freight
prepaid to a destination determined by the MANUFACTURER.
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LISTINGS
This grease duct has been tested and is listed to UL1978 and UL2221 and testing has been extended to
recognize ASTM E2336 and AC101 due to similar testing criteria. Models 2R, 3R and 3Z are used for
grease duct applications when installed in accordance with these instructions and National Fire Protection
Association "NFPA 96"; Standard for Ventilation Control and Fire Protection of Commercial Cooking
Operations.
This factory built chimney has been tested and is listed to UL103 and UL103HT and testing has been
extended to recognize CAN/ULC-S629-M87 & ULC/ORD-C959-1993. Model 2R is intended for installation
within commercial / industrial applications. Model 2R is not intended for use in family dwellings. When
installed in accordance with these instructions and National Fire Protection Association "NFPA 211";
Standard for chimneys.
CLASSIFICATIONS
UL 2221: Standard for Fire Resistive Grease Duct Enclosure Assemblies. Chapter 7 of this standard
references a test labeled Internal Fire Test. Section 7.1.1 references two installation conditions, Condition A
and Condition B. Condition A represents all installation conditions except for installation within non-ventilated
combustible enclosures. Condition B represents installation within a non-ventilated combustible enclosure.
UL 103: Standard for Factory Built Chimneys for Residential Type and Building Heating Appliances.
Model 3Z is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies)as an alternate to 2-
Hr. fire resistive shaft enclosures with a minimum zero clearance to combustibles (sizes 8" to 24" diameter).
Model 3Z is listed in accordance with the requirements for duct enclosure Condition A and B.
Model 3R is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies)as an alternate to 2-
Hr. fire resistive shaft enclosures with a reduced clearance to combustibles (sizes 8"to 24" diameter). Model
3R is listed in accordance with the requirements for duct enclosure Condition B.
Model 2R is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies)as an alternate to 2-
Hr. fire resistive shaft enclosures with a reduced clearance to combustibles (sizes 8"to 16" diameter). Model
2R is listed in accordance with the requirements for duct enclosure Condition B.
Model 2R Type HT is classified under UL103 (Factory Built Chimneys for Residential Type and Building
Heating Appliances). Insulated double wall building heating appliance Chimney / Type HT Factory Built
Chimney intended for commercial and industrial applications in sizes 8 through 16 inch ID.
APPLICATION
Double wall grease ducts are listed for a continuous internal temperature of 500`F and intermittent
temperatures of 20007. Double wall grease duct is ideally suited for use in commercial cooking installations
for the removal of smoke and grease laden vapors. Grease duct system size and capacity information may
be obtained from the ASHRAE Handbook— Fundamentals or from the Air Pollution Engineering Manual of
the US Environmental Protection Agency. Grease duct installations require provisions for cleaning the interior
of the duct. NFPA 96 cleanout requirements are as follows:
1. A cleanout must be provided at each change of direction, except where the entire length of duct can
be inspected and cleaned from either the hood or the discharge end.
2. On horizontal duct runs, at least one (1)20" diameter opening must be provided. Where the opening
is smaller than 20" diameter, openings large enough to permit cleaning must be provided at intervals
of no more than 12'.
3. Openings must be at the side or the top, whichever is more accessible. When the opening is on the
side of the duct, the lower edge of the opening must be at least 1 '/2" above the bottom of the duct.
For the listed grease duct, this is accomplished by the use of the grease manifold tee and cleanout
cap.
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4. On vertical duct runs where personnel entry is possible, access must be from the top of the riser.
Where entry is not possible, access must be provided at each floor.
NOTE: ACCESS REQUIREMENTS ARE SUBJECT TO CHANGE IN ACCORDANCE WITH LOCAL CODE. LOCAL
AUTHORITIES SHOULD BE CONSULTED FOR EXACT REQUIREMENTS. GREASE DUCT MAY BE CONNECTED
ONLY TO HOODS IN A SINGLE FIRE ZONE ON ONE FLOOR. DO NOT CONNECT GREASE DUCTS TO ANY
OTHER PART OF THE BUILDING VENTILATION OR EXHAUST SYSTEM.
When grease duct or chimney is installed in accordance with these installation instructions and the joints are
sealed properly with the recommended sealant, the system will contain a fire within the duct or chimney. A
fire can burn at extremely high temperatures. The system should be dismantled and inspected after any
exposure to a fire. Any section that is distorted or discolored should be replaced. All joints in the system
should be examined. The sealant expands to ensure a positive seal in the case of a fire, and any sealant
that has been exposed to high temperature must be replaced. This will ensure that the system maintains its
integrity against fire conditions in the future. The manufacturer of this grease duct or chimney cannot be
responsible for grease duct or chimney systems that are not properly maintained or have been subjected to
one or more fire.
Factory Built Chimney model 2R Type HT is listed for continuous internal temperatures of 1000'F US &
600'F Canada, intermittent temperatures of 2100`F. Factory Built Chimney model 2R Type HT is ideally
suited for commercial and industrial application for the removal of smoke and heat. Chimney system size
and capacity information may be obtained from the ASHRAE Handbook — Fundamentals or from the Air
Pollution Engineering Manual of the US Environmental Protection Agency. Note: Model 2R Type HT
chimney does not require joints to be sealed with the recommended sealant per the listing report.
When wood is burned slowly, it produces tar and other organic vapors, which combine with expelled moisture
to form creosote. The creosote vapors condense in a relatively cool chimney flue of a slow burning fire. As a
result, creosote residue accumulates on the flu lining. When ignited this creosote makes an extremely hot
fire.
Chimney installations require provisions for cleaning the interior of the chimney. Creosote and Soot
formations need to be removed. The chimney should be inspected once every two months during the
heating season to determine if creosote or soot buildup has occurred. If creosote or soot has accumulated, it
should be removed to reduce the risk of fire. Cleanout requirements are as follows:
1. A cleanout must be provided at each change of direction, except where the entire length of chimney
can be inspected and cleaned from either the equipment or the chimney cap.
2. Openings must be at the side or the top, whichever is more accessible.
3. The chimney inspection should be done every two months during the heating season.
4. If creosote or soot has accumulated it should be removed to reduce the risk of fire.
5. Insert the chimney cleaning brush and brush in a downward motion, be sure to scrub all sides of the
chimney thoroughly and remove all debris.
6. Contact local building or fire officials about restriction and inspection in your area.
NOTE: CHIMNEY/TYPE MODEL 211 TYPE HT FACTORY BUILT CHIMNEY IS INTENDED FOR COMMERCIAL AND
INDUSTRIAL APPLICATIONS. FACTORY BUILT MODEL 2R TYPE HT CHIMNEY IS NOT INTENDED FOR FAMILY
DWELLINGS. CHIMNEY SHOULD BE SIZED IN ACCORDANCE WITH THE "APPLIANCE MANUFACTURE'S
INSTRUCTIONS".
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CLEARANCES
In all buildings more than one story in height and in buildings where the roof-ceiling assembly is required to
have a fire resistance rating, the duct must be enclosed in a continuous enclosure from the lowest fire-rated
ceiling or floor above the hood, through any concealed spaces, to or through the roof to maintain the integrity
of the fire separations required by the applicable building code provisions. If the building is less than 4
stories in height, the enclosure shall have a fire resistance rating of not less than 1 hour. If the building is 4
stories or more in height, the enclosure shall have a fire resistance rating of not less than 2 hours. Single
wall grease duct is primarily intended for use in non-combustible surroundings. When installed in an open
room where enclosure is not required, double wall grease duct or chimney may be located at clearance to
combustibles in accordance with Table 1.
Table 1 — Grease Duct Clearances
DUCT MODEL INNER DIAMETER OUTSIDE CLEARANCE TO CLEARANCE TO NON-
ID) DIAMETER COMBUSTIBLES COMBUSTIBLES
DW 8"-24" = ID 18" 0"
DW-2 R 8"- 16" ID +4 3/4" 0"
DW-2R TYPE HT 8"— 16" ID +4 2"** 0"
DW.3R 8"-24" ID + 6 3/4"*** 0"
DW-3Z 8"-24" ID + 6 0" 0"
The above figures represent air space, in inches, to surrounding.
NOTE:See NFPA 96, 2004 EDITION, Chapter 3, Definition of Combustible, Limited Combustible and Non-Combustible.
*DW—2R: 3/" clearance to combustibles from the surface of the duct outer shell; zero inch clearance from
combustibles from the tip of the outer V Band.
**DW—2R TYPE HT: 2"clearance to combustibles from the surface of the duct outer shell.
***DW—3R: 3/" clearance to combustibles from the surface of the duct outer shell; zero inch clearance from
combustibles from the tip of the outer V Band.
NOTE: Double wall duct systems with reduced clearance"R" have been tested using Condition B—installed
within non-ventilated combustible enclosure. See Fig. 1 below for representation of reduced clearance note,
the V Band may be in contact with a combustible surface. DW-2R TYPE HT must maintain 2 inch clearance
to combustibles.
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y Fig.1 — Duct Reduced Clearance
I' 39"REDUCED
"1 f CLEARANCE.
COMBUSTIBLE
SURFACE.
DOUBLE
V BAND.
DUCT.
Fig. 1 a— 2R TYPE HT Chimney Reduced Clearance
2"REDUCED
CLEARANCE.
CONABUSTIBLE
SURFACE.
.I 2R SHELL I•
O.D.
FIRES T OP 1 I
PLATES. 2"REDUCED
CLEARANCE.
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MECHANICAL
Joint Sealant
The joint sealant used to seal all joint assemblies is a 3M product. 3M Fire Barrier 2000+ Silicone Sealant is
a ready-to-use, gun-grade, one-component silicone elastomer that cures upon exposure to atmospheric
humidity to form a flexible seal. 3M Fire Barrier 2000+ Silicone Sealant, when installed properly, will control
the spread of fire before, during and after exposure to open flames. It will stop the spread of noxious gas,
smoke and water, and maintain the integrity of fire rated assemblies and construction. All grease ducts must
be liquid tight per NFPA 96. The following steps are to be used to ensure that this requirement is met. Model
2R Type HT chimney does not require joints to be sealed with the 3M Fire Barrier 2000+ Silicone Sealant per
the listing report.
NO SEALANT SUBSTITUTES MAY BE USED.
Sealant Features
1. Superior adhesion.
2. Capable of withstanding 2000'F +temperatures.
3. Class 25 sealant, per ASTM 920.
4. Re-enterable/repairable.
5. Provides up to 4-hours fire-rating.
6. Cures upon exposure to atmospheric humidity.
7. Working time 30 minutes.
8. Cure time 14 to 21 days.
9. Applied with a standard caulk gun.
Table 2 — Sealant Usage Chart
3M FIRE BARRIER 2000 PLUS USAGE
DIAMETER DUCT PERIMETER FT AVERAGE FEET NUMBER OF
PER TUBE JOINTS PER TUBE
8" 2.16 30 7
10" 2.68 30 6
12" 3.21 30 5
14" 3.73 30 4
16" 4.25 30 3.5
18" 4.78 30 3
20" 5.30 30 .3
24" 6.35 30 2.5
8
Grease Duct & Chimney Joint Assembly
All grease ducts are to be liquid tight per NFPA 96. The following steps are to be used to ensure that this
requirement is met. Model 2R Type HT chimney does not require joints to be sealed with the 3M Fire Barrier
2000+ Silicone Sealant per the listing report.
1. Fill the V band used with inner ductwork with 3M Fire Barrier 2000+ Silicone. The bead should be
continuous. See Table 2, for the number of joints per tube.
2. Place the loose V band over the duct flange. Apply a continuous bead of 2000+ Silicone 1/4"wide to
the flange that will be joined.
3. Join the two flanged ends of the inner duct sections together and rotate slightly to ensure complete
coverage of sealant on flanges.
4. For horizontal duct runs,the"V"clamp hardware should be located on the top side of the duct and be
orientated between the 3 and 9 o'clock position on the duct.
5. NEVER install the "V" clamp with the hardware orientated on the bottom side of the duct on
horizontal runs.
6. Install the V band around the duct flanges making sure the flanges are located within the V band.
Tap the outside of the V band while tightening V band hardware to make sure the flanges are aligned
and have been pulled together. Secure the'/-20 hardware to 85 in-Ibs.
7. Insulation must be minimum of 4'/2"wide, and the same type and number of layers as the base duct.
Tightly pack and completely fill all voids between the inner duct and the outer shell.
8. Install the double V band ensuring the outer shell flanges are positively engaged in the V bands
before tightening the '/-20 hardware to 85 in-Ibs. The double V band can be sealed using 3M Fire
Barrier 2000+Silicone when being installed outside.
Fig. 2 — Duct & Chimney Joint Assembly
STEP 1 STEP 2 STEP 3
DETAIL A
Y
r
STEP 4 'STEP 5
STEP B
rte.
IMPORTANT: THE HARDWARE USED TO ASSEMBLE THIS DUCTWORK IS SPECIFICALLY
DESIGNED FOR THIS APPLICATION. NO SUBSTITUTE HARDWARE IS ALLOWED. ALL
REPLACEMENT HARDWARE MUST BE PURCHASED FROM THE FACTORY.
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i Adjustable Duct, Chimney & Transition Connection
Adjustable duct sections may be used in conjunction with transition plates when they terminate at the fan.
The adjustable duct section is fully welded to the transition plate, and then connected to the standard duct
length using non-welded connections. Double wall adjustable duct sections are assembled in the field, as
the exact length needed for the application is not known. Components for outer shell and insulation ship
loose. Once fully assembled, the transition plate is secured to the curb using the method referenced in Fig.
8 — Fan Adapter Plate. Model 2R Type HT chimney does not require joints to be sealed with the 3M Fire
Barrier 2000+ Silicone Sealant per the listing report, however, all other steps must be followed.
1. The standard duct section in the adjustable assembly is installed using the standard connection
method, (see Fig. 2). Note:this is the piece with two flanges and the outer shell collar already
attached 1 '/"from the duct flange.
2. Adjustable duct assemblies that are used with transition plates only have one inner duct flange
protruding from the outer duct shell. This is the side that connects to the standard length duct.
3. The adjustable collar is slipped on to the adjustable duct section. Make sure the adjustable collar
flanges are opposite the adjustable duct section flange.
4. The adjustable section is pushed inside the standard duct section. Make sure the minimum overlap is
set correctly; see Table 3.
5. Once the overlap is set correctly, silicone the flanges of the bottom duct section and the adjustable
collar using connection method referenced in Fig. 2—Joint Assembly step 1 through step 3.
6. Adjustable collars are sealed to the adjustable duct using 3M Fire Barrier 2000+ Silicone. Once the V
band has been installed, tighten the adjustable collar hardware to 85 in-lbs.
7. The insulation provided is used to wrap the adjustable assembly. Ensure all voids are adequately
filled.
8. Cut the outer shell cover to the length and then install using the provided sheet metal screws. Make
sure the shell cover overlaps and are secured to the shell collars. Use only hardware provided as
longer screws may penetrate inner duct.
} 9. 3M Fire Barrier 2000+ Silicone may be used to seal the outer shell.
Fig. 3 —Adjustable Duct, Chimney & Transition Plate
STEP 1 TRANSITION STEP 2
STEP 3
PLATE.
UTER SHELL TIGHTEN
C OLLAR,
3M FIRE BARRIER 851N-LBS. -
2000
ADJUSTABLE -
�, DUCT,
- ADJUSTABLE _
COLLAR.
=- --- TIGHTEN =. ,...- ...
SS IN.LBS. -
3M FIRE BARRIER
.,. 2000 PLUS,
V BAND.
TANDARD 3M FIRE BARRIER OUTER SHELL
DUCT, 2000 PLUS. COLLAR.
STEP �PLATEITION STEPS STEP6
CUM-
INSULATION.
t
_ UTER SHELL
INSULATION.- SHEET METAL COVER. "
SCREWS,
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Adjustable Duct, Chimney Standard Installation
Adjustable duct lengths are used to make up variable lengths in the duct system(s). Adjustable sections
should always be installed with the overlap to the inside of the standard duct section. Overlap should
always be opposite the direction of airflow. This will allow grease/water to run back to the hood when the
system is shut down. If the inner adjustable section is too long to fit into the adjacent section of duct
without interfering with the flow path it should be trimmed to the desired flange to flange length. Flange to
flange length of adjustment can range from 4" to 26". Model 2R Type HT chimney does not require joints
to be sealed with the 3M Fire Barrier 2000+ Silicone Sealant per the listing report.
1. The standard duct section in the adjustable assembly is installed using the standard connection method,
(see Fig. 2). Note:this is the piece with two flanges and the outer shell collar already attached 1 '/2"from
the duct flange.
2. The adjustable collar is slipped on to the adjustable duct section. Make sure the adjustable collar flanges
are opposite the adjustable duct section flange.
3. The adjustable section is pushed inside the standard duct section. Make sure the minimum overlap is
set correctly see Table 3.
4. Once the overlap is set correctly, silicone the flanges of the bottom duct section and the adjustable collar
using connection method referenced in Fig. 2—Joint Assembly step 1 through step 3.
5. Adjustable collars are sealed to the adjustable duct using 3M Fire Barrier 2000+ Silicone. Once the V =
band has been installed, tighten the adjustable collar hardware to 85 in-lbs.
6. The insulation provided is used to wrap the adjustable assembly. Ensure all voids are adequately filled.
7. Cut the outer shell cover to the length and then install using the provided sheet metal screws. Make sure
the shell cover overlaps and are secured to the shell collars. Use only hardware provided as longer
screws may penetrate inner duct.
8. 3M Fire Barrier 2000+Silicone may be used to seal the outer shell.
Table 3 — Minimum Overlap
MIN OVERLAP FOR
DIAMETER ADJUSTABLE
DUCT & CHIMNEY
8,1 '
10.. 5„
12" 6"
14" 6"
16" 6"
18" 6'$
20" 6"
24" 6"
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Fig. 3a —Adjustable Duct & Chimney Overlap
INSTALLED LENGTH
MIN.SEE TABLE a. AIRFLOW DIRECTION
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OUTER SHELL ADJUSTABLE
COLLAR. V BAND. SECTION.
DUCT SECTION. ADJUSTABLE
COLLAR.
Fig. 3b — Collar & Adjustable Duct, Chimney Installation
STEP 1 STEP 2 STEP 3
3M FIRE BARRIER
2000 PLUS. ADJUSTABLE �"Y 2 FIRE B R.RIER
DUCT,
ADJUSTABIE
COLLAR.
TIGHTEN `
851N-LBS.
STANDARD TIGHTEN
" . DUCT. : 851N LBS.
STEP 4 STEP 5
INSULATION.
—OUTER SHELL
SHEET M ETAL
tee' q COVER.
SCP.EUUS,
INSULATION.
4
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Risers — Factory & Field (Bolted) Risers
There are two options for the riser (connection to the hood plenum); factory welded and field bolted. Factory
installed risers are welded to the plenum per instructions that detail riser size and location. The instruction
below covers field installed (bolted) riser(s). When field installed riser(s) are requested, they ship loose
allowing the installer to decide on the location. Field installed riser(s) are preferred when the exact location is
not known or when adjustments need to be made for misalignment in duct systems.
1. Locate the specific position at which the riser needs to be installed.
2. Use the riser as a guide when marking the hood. Note: Make sure the hole location is inside the
plenum area before cutting any holes.
3. Since the riser is going to be bolted to the plenum, a bolt hole circle will need to be cut. Use the
bottom or loose retaining ring as a template. Align the inner circles of the hole in the plenum with the
retaining ring and mark the bolt hole circle. Make sure the bolt hole circle is inside the plenum area
before cutting.
4. Use the 3M Fire Barrier 2000+ Silicone to seal around the riser hole. Apply sealant to the top and
bottom of the hole. Make sure the silicone bead is a minimum of/"thick and is continuous inside
and outside of the bolt hole circle.
5. Center the riser over the hole in the plenum and push down. Make sure the riser flange is positively
sealed. Also, make sure the captured retaining ring on the riser is pushed down into the sealant.
Sealant should come through the holes on the ring.
6. Align the loose retaining ring with the hole on the inside of the plenum. Push the ring up into the
sealant. Align the holes in the bottom and top retaining rings and secure using '/-20 hardware.
7. Place the loose duct flange ring over the riser before installing the connecting duct section using
connection method (see Fig. 2—Joint Assembly, step 1 through step 3).
8. Once the riser and connecting duct section(s) have been connected, install the insulation provided.
Make sure all voids are filled.
9. Install the riser covers by pushing the two halves together around the duct flange ring and securing it
using sheet metal screws provided. Use only hardware provided, as longer screws may penetrate
the inner duct.
10. See Fig. 2—Joint Assembly, step 1 through step 3, to install standard duct sections to factory
installed or welded risers.
11. The slots in the riser covers provide an opening for the installation of duct sensors if required.
Fig. 4 — Field Installed Riser— Bolted
STEP 1 STEP.2
3M FIRE BARRIER RISER.
2000 PLUS. DOUBLE WALL
DUCT.: emu„
V BAND.
DUCT FLANGE
RING.
HOOD TOP.
RETAINING
,RINGS.
1!420 HARDWARE.
V BAND. STEP 4
RISER COVER:. STEPS
HOLE FOR
_ DUCT STAT
INSTALLED
HERE:
'INSULATION.
i. SHEET METAL
ISER..COVER: SCREWS,
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Fig. 5 — Duct Drain
Duct Drains
Drains are used to provide a point at which low points DUCT secTloN.
in the duct system can be drained. Condensation DOUBLE v TEE.
and low lying water left over from duct cleaning can BAND.
be drained easily with the installation of the ball valve
drain. Drains are designed to aid in duct cleaning - ADAPTER.
and can be used to drain grease into an approved _
grease collection reservoir. Drains can be hard piped
to an approved grease collection reservoir, remove
the cap and connect to the 1-1/2" NPT threads (see
Fig. 5.for details).
ADAPTER.
Manifold Tee DRAIN.
The manifold tee is used to provide access for
cleanout to comply with NFPA 96 requirements. It is equipped with an internal blank that acts as a grease
dam and gasket. The access port is then closed with a cleanout cap or tee cap.The tee cap is then covered
with layers of insulation that is covered in an outer shell called the access door collar. The location of the
access port in the tee is dependent on the orientation of the tee in the final installation. The access port
location in the manifold tee can be orientated as required (see Fig. 6). Access ports should never be located
where grease can build up and fall out once the cleanout cap is removed or where the access door collar
cannot be removed to gain access to the inner duct.
Fig. 6 - Manifold Tee Position
OUTER DUCT INNER DUCT
SHELL SHELL
igW
_ r
ACCESS DOOR
ACCESS DOOR
RIGHT—
LEFT
ACCESS DOOR
TOR t-----INSULATION
& CASKET
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Access Door (Tee Cap) Assembly
Access doors (tee caps)are available in diameters from 8"to 24". They work in conjunction with the manifold
tee as previously shown in Fig. 6. The tee joint connection is shown in Fig. 2 — JOINT ASSEMBLY;
however, the installation of the access door is slightly different so read the following instructions very
carefully. Consult NFPA 96, Chapter 7, Section 7.3.1 "Openings shall be provided at the sides or at the top
of the duct, whichever is more accessible, and at change of directions."
1. Select the location and the position of the access door.
2. All tee joints will be connected as shown in Fig. 2—JOINT ASSEMBLY except for the access door.
3. Apply the proper sealant to the flange of the tee that will be used for access to the duct system.
4. Apply a '/" continuous bead around the flange.
5. Center the inside blank (grease dam) over the opening of the tee and apply pressure. Pushing the
inside blank down onto the tee flange sealant, securing the inside blank to the tee flange.
6. Apply enough pressure to create a positive bond between the tee flange and the inside blank.
Remove excess sealant after making parts concentric(centered).
7. Apply a '/" continuous bead around the inside blank 1"from the outside edge.
8. Center the listed gasket over the inside blank and push the gasket down into the sealant securing the
gasket to the inside blank.
9. Sealant will begin to cure upon exposure to atmospheric humidity. It will form a flexible seal.
10. Once the sealant is dry attach the access door using a W" clamp. Ensure flanges are in the W"
before tightening '/4-20 hardware to 80 in-lbs.
11. Once the inner access door assembly is complete install the outer access door or access door shell.
12. The outer access door shell is used to seal the inner access door with insulation, (see Fig. 7 below).
Fig. 7 — Access Door Assembly
GASKET-1
INNER DUCT INr1E?
A
Icy
DAM DOOR f—CCES
S
INSULATION DA �
1
OUTER DUCT
SHELL
j F
= OUTER
V SAND
IN HER
V BW'ID
OUTER
' ACCESS
DOOR
f"t
3 LAY=RS
ACCESS DGOR
INISULAII
CUTER
SHELL
15
Fan Adapter Plate Fig. 8 — Fan Adapter Plate
j The fan adapter plate (Transition Plate) is designed to connect
to a roof curb. The duct section is welded to the underside of
the adapter plate. The adapter plate is formed to provide a EXHAUST FAN.
slope to allow grease deposits to flow back towards the duct.
When connected (see Fig. 8), the plate mounts on top of the fan TRANSITION
curb that supports the fan housing. The plate may be positioned CERAMIC
off center within the curb provided that the minimum distance to VENTED GASKET.
combustibles is maintained. In the event that the plate is CURB.
positioned off center, trim off excess plate material to allow for
fan placement. Secure the plate to the curb using a minimum of
three fasteners per side. A suitably sized fastener provided by VERTICAL
others is used. The fan adapter plate can be used to maintain ADJUSTABLE SUPPORT.
distance to combustibles and also for vertical support. See Fig. DUCT SECTION.
3 for adjustable duct section assembly. The top collar is
installed upside down to seal the insulation at the fan
termination/transition plate.
Fig. 8a — Chimney Adapter Plate
Chimney Adapter Plate
The Chimney adapter plate (Transition Plate) is designed to
connect to a roof curb. The Chimney section is welded to the CHIMNEY CAP.
underside of the adapter plate. When connected (see Fig. 8a), the TRANSITION
plate mounts on top of the curb that supports the chimney cap. The
PLAT. .
plate may be positioned off center within the curb provided that the
CERAMIC
minimum distance to combustibles is maintained. In the event that v VENTED GASKET.G2KET.
the plate is positioned off-center, trim off excess plate material to CURB
allow for chimney cap placement. Secure the plate to the curb
using a minimum of three fasteners per side. A suitably sized
fastener provided by others is used. The chimney adapter plate FIRE
can be used to maintain distance to combustibles and also for STOP. CHIMNEY
vertical support. Ceramic gasket is used to seal the adapter plate I ,_
to the underside of the chimney cap. WARNING, clearance (air e�
space)to combustibles will be free from any type of insulation. VERTICAL
SUPPORT.---'
Prevention of Grease Accumulation in Horizontal Grease Duct
In some areas the local code authority may insist on inclusion of/" per foot slope. In such cases, a short
"Slope Transition" section is available from the factory. For correct installation, two slope transitions are
generally required - one at the beginning and end of the horizontal duct run. For installations with horizontal
runs greater than 75 feet, some local codes demand a 1" per foot slope. Consult with local code authorities if
unsure about local requirements. Offset collars have been designed to meet the above specification. The
collar is used in conjunction with other accessories such as tee's and elbows to maintain the above listed
slope in horizontal duct runs. The W" clamp hardware should be located on the top side of the duct and be
orientated between the 3 and 9 o'clock position on the duct. Never install the W" clamp with the hardware
orientated on the bottom side of the duct on horizontal runs.
16
I
Alignment & Bracing of Grease Duct
Grease duct has the characteristics of a continuous stainless steel pipe and it will expand and contract along
its entire length with changes in temperature. For this reason, conventional methods of attaching guides and
braces to the outer wall of the grease duct cannot be used. Correctly installed support rings, saddles and
wall guide assemblies will serve to keep the duct aligned, provide for adequate resistance to lateral loads
and allow the free axial expansion and contraction movement. A simplified rule for duct expansion is that the
axial growth will be approximately 1 inch per 100 feet of pipe length for each 100 degrees Fahrenheit the
exhaust vapor temperature is above the surrounding air temperature.
Horizontal Support & Support Spacing Table 4— Horizontal Support Spacing
Horizontal duct runs are supported using 2 X 2 X 1/8"angle,
Uni-strut and or Uni-strut/saddle combination. Horizontal DIAMETER HORIZONTAL
support spacing is shown in Table 4. When cutting the angle or
Uni-strut to length, there must be a minimum of 2"on either side SUPPORT SPACING
of the duct shell to allow for rod attachment. Once the angle (FEET)
has been cut to length it is suspended using 1/2"threaded rod 8" 7'
(minimum). Appropriate sized holes are drilled/ punched in 10" 7'
either end of the angle. The 1/2"threaded rod is secured to the
angle or Uni-strut using 1/2"grade 5 hex nuts and 1/2" hardened 12 7
washers, see Fig. 9. Note: double hex nuts are used as locking 14" 7'
nuts to make sure hardware does not come loose overtime. 16" 7'
18" 5'
20" 5'
24" 5'
1
17
r
Fig. 9 — Horizontal Support Details
1
IMPORTANT: VERTICAL & HORIZONTAL SUPPORTS SHOWN IN THIS MANUAL ARE
RECOMMENDED. SUPPORTS BY OTHERS MUST BE APPROVED BY THE MANUFACTURER AND
AHJ. SUPPORT SPACING MUST BE AS STATED IN THIS MANUAL.
1/2"THREADED DUCT SECTION.
RODS,
CENTER DOUBLE V BAND.
DUCT
_ DP USDIA. UNI STRUT. SEE TABLE 4 ►-�
CENTER
DUCT
W"THREADED 1/2"THREADED
RODS. RODS.
112'HARDENED
UNI STRUT. WASHERS 2 PLC'S.
SADDLE.
10 HEX NUTS
GRADE 5,4 PLC'S.
UNI STRUT.
I DUCT DIA.�
fff��� PLUS 4'
UNI STRUT-BOTTOM CONNECTION
1/2"THREADED 1/2"HEX NUTS RO THREADED
RODS. GRADE 5,2 PLC'S. RODS. SADDLE.
(BOTTOM)
112"HARDENED
WASHERS 2 PLC'S.
1/2"HARDENED
SADDLE. WASHERS 2 PLC'S.
(TOP)
UNISTRUT.
/-112"HEX NUTS
GRADE 5,4 PLC'S.
SADDLE-TOP CONNECTION SADDLE-BOTTOM CONNECTION
I
18
Vertical Support &Vertical Support Spacing
% Duct and chimney system(s) require supports along vertical runs. There are multiple vertical supports used
for duct and chimney system(s). Each support assembly is designed for a specific type of installation.
Review installation site before selecting supports. There are three different types of hardware supplied
depending on the type of wall that the duct or chimney is being supported on. There are three types of wall
construction listed below; gypsum with wooden studs, gypsum with 25 gauge steel studs and
concrete/masonry. Each wall construction type requires different hardware to be used when installing the
support assembly. Maximum vertical support spacing is shown in Table 5. Do not exceed this listed vertical
spacing.
Table 5—Vertical Support Spacing
DIAMETER DUCT VERTICAL 2R Type HT CHIMNEY
SUPPORT VERTICAL SUPPORT
SPACING (FEET) SPACING (FEET)
8" 10' 20'
10" 10' 20'
1211 10' 20'
14" 10' 20'
16" 10' 20'
18" 10' N/A
20" 10' N/A
24" 10' N/A
19
Fig. 10 —Vertical Wall Support Kit
IMPORTANT: VERTICAL & HORIZONTAL SUPPORTS SHOWN IN THIS MANUAL
ARE RECOMMENDED. SUPPORTS BY OTHERS MUST BE APPROVED BY THE
MANUFACTURER AND AHJ. SUPPORT SPACING MUST BE AS STATED IN THIS
MANUAL.
WALL SUPPORT PLATE.
FLAT SUPPORT PLATE.
5116-18 WHIZ NUTS&BOLTS
USED TO SECURE TO TOP
PLATE TO THE SIDE PLATE,
-;t}•rt �-"" .
5116-18 X I'SELF DRILLING
4 SCREWS USED TO SECURE
�..� DOUBLE WALL DUCT SHELL
T
- = SIDE SUPPORT PLATE.
WALLSUPPORT PLATE.
Fig. 10a —Vertical Support Duct Details
DUCT
_. SYSTEM,
4 DUCT VERTICAL SUPPORTS f/—DOUBLE WALL MATERIAL
HAVE SPECIFIC INSTALLATION V BAND SEE INSTALLATION
INSTRUCTIONS PER THE 51 PE INSTRUCTIONS PER
OF WALL CONSTRUCTION,SEE CONSTRUCTION TYPE,
SPECIFIC DETAIL BELOW. DOUBLE
TYPES OF WALL VERTICAL V BAND.—
CONSTRUCTION: SUPPORT:
2X4WOODEN STUDS.
2X4(25)GAUGE STUDS.
CON CRETE E MASONRY. DUCT SYSTEM.
SEE TABLE 5
D UC T SYSTEM.
V BAND INSTALLED
ABOVE THE
TOP PLATE.
- HORIZONTAL
SUPPORT.
CEILING. VERTICAL --
` SUPPORT.
'• VERTICAL
o• SUPPORT.
$!1818 X 1"
SELF DRILLING 116 WHIZ NUTS
SCREWS. 2 BOLTS USED TO
SECURE TOP PLATE.
SEE TABLE4--
20
Fig. 10b —Vertical Floor Support Kit for 2R Type HT Chimney
2R SHECL INSIDE Q 11 MNEY.
SUPPORT FLATE.
VE ICAL f
5UPPOR.RING. / CO+ABl:SD3LE
I�SURFACE.
1142J W.H7 NUTS&BOLTS �5/1 TEX I-°ELFC:{i'*LING
USED TO SECURE THE SCR.°WS USED TO SECURE
SU"^FLT F.IhG. / CHIbANE.'2R SHEEL.
Fig. 10c —Vertical Support Chimney Details
VERTICAL FLOOR SUPPORT. BASE MOUNT CAP. BASE CAP.
VERTICAL TRANSITION CHININEY
SUPPORT PLATE. PLATE.—, BASE CAP.
FIRE STOP.
VERTICAL SEE TABLE S.
VENTED CERAMIC
SUPPORT PING,
CUP,B.-- GASKET,
VERTICAL
l
—FLOOR. FIRE SUPPORT._
� STOP.
5/16-18X I"SELF DRILUNG CHIMNEY
SCREWS USED TO SECURE
CHININEY 2P,SHELL.
L i
VERTICAL SEE TABLE S.
1/4-20 WHIZ NUTS R BOLTS SUPPORT,
USED TO SECURE THE
SUPPORT RING.
MAXIMUM ANGLE NOT TO EXCEED
FIRE STOP 2"CLEARANCE. 30°=US
45°=CANADA
INSIDE DOUBLE"V"BAND
FLOOR, CHIMNEY. I/2 THREADED ABOVE SUPPORT
ROD. PLATES.
.-2R SHELL. VERTICAL WALL
VERTICAL FLOOR
a_ SUPPORT WITH SUPPORT.
THREADED ROD
SEE FIG 9.&HG IOG,� --WALL.
FIRE PLATE 1. I
TABLE 6. —FIRE PLATE 2.
HARDWARE. I 8'MAXIMUM
STRAIGHT LENGTH
30 DEGREES=US /
45 DEGREES=CANADA
t
21
Vertical Support for Wooden Wall Construction
1. Wall must be constructed of 2 x 4 wooden studs with a max spacing of 24 inches on center and
covered with 5/8 inch gypsum.
2. Install the top wall support plate so that the flat supports plates, when installed, will be under the duct
v-band. See Fig 10a for details.
3. The wall support plate has specific holes that locate the side plates so that when installed, they
match the duct outer shell diameter. Measure the duct diameter and then measure from the wall
plate center holes the radius to locate the first side plate. Example: if the duct being installed has a
30 inch outside shell, measure from the center of the wall plate 15 inches. This will locate the inside
of the side plate on the wall plate. Side support plate mounting holes should be on the outside.
4. Once the first wall support plate is located, secure to the wall using the 5/16 x 4 inch toggle bolts and
washers. Use the 7/8 inch holes that are 24 inches on center from the side plate mounting holes. In
some cases, mounting holes may have to be drilled to align with studs.
5. Follow the instructions above and mount the second wall support plate. Measurement will be 44
inches from the top of the first wall support to the bottom of the second wall support.
6. Install the side support plates. Measure from center and locate the first plate. One of the side plates
must be installed using 5/16 x 3 1/2 inch lag bolts and washers directly into the 2 x 4 wooden stud. Fill
all holes using the lag bolts and washer that line up with the stud. Lag bolts will secure the wall
plates and side plates to the studs.
7. Measure 24 inches from the first stud that the side plate is secured to and install 5/16 x 3 1/2 inch lag
bolts and washers. This will secure the wall support plate to the stud 24 inches on center.
8. Measure from center and install the second side plate. This plate may fall between studs and if so,
secure using the 5/16 x 4 inch toggle bolts and washers.
9. Repeat the above process so that both wall supports and side plates are installed and secure.
10. Install the rear flat support plate using 5/16 nuts and bolts. Mount the duct so the v band is above
the flat support plate and secure by installing the front flat support plate.
11. The v band W"should be sitting on top of the flat plate. A cut out is provided in the flat plate, align
the v band bracket with the cutout so it doesn't interfere with the top of the plate.
12. Secure the side support left and right plates to the outer duct shell using the 5/16-18 x 1 inch self-
drilling screws. Use the guide holes to locate the shell center and fill all holes center, center left and
center right. A minimum of 18 screws must be used on each side of the duct.
Figure 10d —Wooden Stud Wall Vertical Support
WGYPSUM.
2 X 4 WOODED
24.000 STUDS.
ALL SUPPORT PLATE.
116-18 X 1"WHIZ ALL SUPPORT PLATE.
UTS&BOLTS.
JJJ FLAT SUPPORT
PLATE. FLAT SUPPORT PLATE
SIDE SUPPORT PLATE.
SIDE SUPPORT PLATE MUST BE INSTALLED
USING 5h 6 X 4"TOGGLE BOLTS&WASHERS
44.000 WHEN INSTALLED OVER OPEN CAVITIES.
SIDE SUPPORT PLATE-MIMIMUM OF ONE
SIDE PLATE MUST BE INSTALLED DIRECTLY
\� INTO ASTUD USING LAG BOLTS&WASHERS.
, --WALL SUPPORT PLATE-MUST BE INSTALLED
USING 5A 6 X 31 Z LAG BOLTS&WASHERS
DIRECTLYINTO THE 2X 4 STUDS.
5A 6-18 X 1'SELF
DRILLING SCREWS.
5116 X 4"TOGGLE
BOLTS&WASHERS..
571648 X 3112"LAG BOLTS
&WASHERS INSTALLED DIRECTLY
INTO THE 2 X 4 STUDS.
22
I
Vertical Support for 25 Gauge Steel Stud Wall Construction
1. Wall must be constructed of 2 x 4 25 gauge (minimum)steel studs with a max spacing of 24 inches
on center and covered with 5/8 inch gypsum.
2. Install the top wall support plate so that the flat supports plates, when installed, will be under the duct
v-band. See Fig 10a for details.
3. The wall support plate has specific holes that locate the side plates so that when installed, they
match the duct outer shell diameter. Measure the duct diameter and then measure from the wall
plate center holes the radius to locate the first side plate. Example: if the duct being installed has a
30 inch outside shell, measure from the center of the wall plate 15 inches. This will locate the inside
of the side plate on the wall plate. Side support plate mounting holes should be on the outside.
4. Once the first wall support plate is located, secure to the wall using the 5/16 x 4 inch toggle bolts and
washers. Use the 7/8 inch holes that are 24 inches on center from the side plate mounting holes. In
some cases, mounting holes may have to be drilled to align with studs.
5. Follow the instructions above and mount the second wall support plate. Measurement will be 44
inches from the top of the first wall support to the bottom of the second wall support.
6. Install the side support plates. Measure from center and locate the first plate. One of the side plates
must be installed using 5/16 x 1 'h self-drilling screws and washers directly into the 2 x 4 metal studs.
Fill all holes using the self-drilling screws and washer that line up with the stud. Self-drilling screws
will secure the wall plates and side plates to the studs.
7. Measure 24 inches from the first stud that the side plate is secured to and install 5/16 x 1 1/Z inch self-
drilling screws and washers. This will secure the wall support plate to the stud 24 inches on center.
8. Measure from center and install the second side plate. This plate may fall between studs and if so,
secure using the 5/16 x 4 inch toggle bolts and washers.
9. Repeat the above process so that both wall supports and side plates are installed and secure.
10. Install the rear flat support plate using 5/16 nuts and bolts. Mount the duct so the v band is above
the flat support plate and secure by installing the front flat support plate.
11. The v band W"should be sifting on top of the flat plate.A cut out is provided in the flat plate, align
the v band bracket with the cutout so it doesn't interfere with the top of the plate.
12. Secure the side support left and right plates to the outer duct shell using the 5/16-18 x 1 inch self-
drilling screws. Use the guide holes to locate the shell center and fill all holes center, center left and
center right. A minimum of 18 screws must be used on each side of the duct.
Figure 10e —Steel Stud Wall Vertical Support
5.B'GYP SLM.
X4-6 GAUGE
24.0)0
STEEL STUDS,
ALL SUPPORT PLATE
W=LL SUPPORT PLATE
FLAT SUPPORT
PLATE _
FLAT SUPPORT PLATE
S/18.18 X i"WHE
NUTS&BOLTS. - _-.
44.000 - SIDE SUPPORT PLATE,
=-" - SIDESUPPORT PLATE-MUST BEINSTPLLED
USINGS/IOX 4"TO OGLE BOLTS&WASHERS
WHEN INSTALLED OVER OPEN CAVITIES OR
25 GAUGE STEEL STUDS,
SIDE SUPPORT PLATE-MivlMlRrf Of ONE
L..�`Ni.° SIDE PLATE MUST BE INSTALLED DIRECTLY
_................. + -- - INTO A STUD WING SELF DRILLING SCREWS
&WASHERS.
SIDE SUPPORT
PLATE WALL SUPPORT PLATE-MUST BE INSTALLED
USING 5116 X 1 V!2"SELF DRILLING SCREAi$
&VM HERS DIRECTLY INTO THE 2 X 4(25)
AS-18 X I"SELF GAUGE STEEL STUDS.
DRILLING SCREWS.
/IB X 4"TOGGLE
BOLTS&WASHERS_
5118 X I ill"SELF DRILLING SCREWS
&WASHERS INSTALLED DIRECTLY
INTO THE X 4(25)GAUGE STEEL STUDS.
23
Vertical Support for Concrete/Masonry Wall Construction
1. These steps describe the method to attach the vertical support to a concrete and (or) masonry wall.
2. Install the top wall support plate so that the flat supports plates, when installed, will be under the duct
v-band. See Fig 10a for details.
3. The wall support plate has specific holes that locate the side plates so that when installed, they
match the duct outer shell diameter. Measure the duct diameter and then measure from the wall
plate center holes the radius to locate the first side plate. Example: if the duct being installed has a
30 inch outside shell, measure from the center of the wall plate 15 inches. This will locate the inside
of the side plate on the wall plate. Side support plate mounting holes should be on the outside.
4. Once the first wall support plate is located, secure to the wall using the 5/16 x 2 1/4 inch
concrete/masonry screws and washers. Use the 7/8 inch holes that are 24 inches on center from the
side plate mounting holes. Install 5/16 x 2 1/4 inch concrete/masonry screws in each end of the wall
support plate. In some cases, mounting holes may need to be drilled.
5. Follow the instructions above and mount the second wall support plate. Measurement will be 44
inches from the top of the first wall support to the bottom of the second wall support.
6. Install the side support plates. Measure from center and locate the first plate. Fill all holes using the
5/16 x 2 1/4 inch concrete/masonry screws and washer. Concrete/masonry screws will secure the
wall plates and side plates to the wall.
7. Measure 24 inches from the first set of holes in the side plate that is secured to the wall and install
5/16 x 2 1/inch concrete/masonry screws and washers. This will secure the wall support plate to the
wall.
8. Measure from center and install the second side plate using 5/16 x 2 1/inch concrete/masonry
screws and washers.
9. Repeat the above process so that both wall supports and side plates are installed and secure.
10. Install the rear flat support plate using 5/16 nuts and bolts. Mount the duct so the v band is above
the flat support plate and secure by installing the front flat support plate.
11. The v band W"should be sifting on top of the flat plate. A cut out is provided in the flat plate, align
the v band bracket with the cutout so it doesn't interfere with the top of the plate.
12. Secure the side support left and right plates to the outer duct shell using the 5/16-18 x 1 inch self-
drilling screws. Use the guide holes to locate the shell center and fill all holes center, center left and
center right. A minimum of 18 screws must be used on each side of the duct.
Figure 1 Of— Concrete/Masonry Wall Vertical Support
WALLSUPPORT 24.000 CONCRETEIMASONRY.
PLATE.
f LATSUPPORT- WALL SUPPORT
PLATE. - PLATE.
5H8-18X1`WHI I�i JIIII I PLAT SU PPORT
NUTS BOLTS, I� Illpp PLATE.
SIDESUPPORT
� PLATE.
a 44.000
, {tr - SIDE SUPPORT PLATE-MUST BE INSTALLED
: - USING 8118 X 2119'CON CRETE IMASONRY
- = x SCREWS&WASHERS DIRECTLY
IN TO THE WALL
WALL SU PPOR T PLATE-MU ST BE INSTALLED
USING 8118X2 114'CONCRETE 7 MASONRY
SIDE SUPPORT SCREWS&WASHERS DIRECTLY
PLATE. INTO THE WALL
18-18 X 1"SELF
DRILLING SCREWS.
WALL&SIDE SUPPORT PLATE-MUST BE
INSTALLED USING U18 X2 1/4"CONCRETEI
MASONRY SCREWS&WASHERS DIRECTLY
INTO THE WALL.
I
24
t
Vertical Floor Support for Wooden Floor Construction
1. The vertical floor support is used when the wall support cannot be used or installed directly under a
connecting "W band. The vertical support assembly consists of two floor plates with attached
support bands.
2. Floor must be constructed of 2"x 8"wooden Joists, 16" on center and covered with 3/4" plywood.
3. The opening in the floor is sized per the outer diameter of the chimney shell and 2" clearance to
combustibles per Table 6.
4. Opening example: 16" -2R chimney outer shell diameter is 20". The opening in the floor will be 24-
1/4"which allows for 2" minimum clearance to combustibles and clearance to install fire stop plates
when required.
5. Once the opening has been framed, insert the chimney into the opening.
6. Mount the floor support plates onto the floor joist and bolt together using 1/4-20 nuts and bolts.
7. Rotate the floor plates so the sides are aligned with outer edge of the floor joists.
8. Secure the floor plates to the floor using zinc plated #14 x 2" Phillips Head Wood Screws with
washers.
9. Slide the chimney up and down until it's in the desired position and secure using 5/16-18 x V zinc
plated self-drilling screws. Use a minimum of three screws per opening in the band, see below for
details.
10. WARNING, clearance (air space)to combustibles will be free from any type of insulation.
Figure 10g —Vertical Floor Support -Wooden Floor Construction
t
#14x 2'PHILLIPS HEAD
WOOD SCREWS&WASHERS
INSIDE CHIMNEY. ZINC PLATE.
2R SHELL
VERTICAL
SUPPORI RING. `-COMBUSTIBLE
SURFACE.
I
y VERTICAL
SUPPORT PLATE_
h� rf
"'. S/16-18 X I"SELF DRILLING
1/4-20 WHIZ NUTS&BOLTS '
USED TO SECURE THE SCREJJS USED TO SECURE
r' CHIMNEY 2R SHEEL.
SUPPORT RING. '
}
25
i
Vertical Floor Support for Concrete Floor Construction
1. The steps listed below detail the vertical floor support for concrete floors. The vertical floor support is
used when the wall support cannot be used or installed directly under a connecting W" band.
2. The vertical support assembly consists of two floor plates with attached support bands.
3. The opening in the floor is sized per the outer diameter of the chimney shell and 2"clearance for
combustibles per Table 6.
4. There is no need to account for the 2"clearance for combustibles since the floor is concrete,
however, all support plate are sized per the opening example below.
5. Opening example: 16"-2R chimney outer shell diameter is 20". The opening in the floor will be 24-
1/4"which allows for a 2" clearance to combustibles and clearance to install fire stop plates when
required.
6. Once the opening has been cut, insert the chimney into the opening.
7. Mount the floor support plates onto the concrete floor and bolt together using 1/4-20 nuts and bolts.
8. Rotate the floor plates so the sides are aligned with the opening.
9. Secure the floor plates to the floor using 5/16-18 x 2 '/" concrete/masonry screws and washers.
10. Slide the chimney up and down until it's in the desired position and secure using 5/16-18 x 1"zinc
plated self-drilling screws. Use a minimum of three screws per opening in the band, see below for
details.
Figure 10h —Vertical Floor Support - Concrete Floor Construction
CONCREE
SURFACE.—,.
/–INSIDE CHIMNEY. -
2R SHELL.—
VERTICAL
SUPPORT PLATE.------
CONCRETE
SURFACE.
VERTICAL
SUPPORT RING.
511 6-18 X 2 1/4"CONCRETE
SCREWS&WASHERS.
1/4-20 WHIZ NUTS&BOLTS 5J16-16 x I"SELF DRILLING
USED TO SECURE THE SCRE4'JS USED TO SECURE
SUPPORT RING. CHIMNEY 2R SHELL.
f
26
r
I
Through Penetration & Fire Stops
Through floor fire stop support assemblies are used to support duct sections that penetrate a fire resistant
floor(s). The full support ring is installed under the double V band; the struts are connected to the support
ring with supplied 5/16-18 hardware. Once the struts have been connected they are secured to the floor
using appropriate type and size fasteners supplied by others. The fire stop support is designed to support the
penetrating duct section and maintain annular distance, see Fig. 10a above for details.
When duct/chimney systems penetrate a fire resistance rated floor, ceiling and/or a wall, a fire stop kit is
used to retain the fire resistance rating on the floor and/or wall. The double wall grease duct and chimney
(2R, 2R Type HT, 3R and 3Z)and the fire stop assemblies detailed below have achieved 2-hour ratings for
integrity, insulation and stability. Testing was conducted in accordance with the applicable requirements UL
2221, Test of Fire Resistive Grease Duct Enclosure Assemblies. Testing was conducted in accordance with
the applicable requirements UL 103, Factory-Built Chimneys, intended for Commercial and Industrial
Applications.
Table 6 — Opening Size through Penetrations
DUCT CHIMNEY INNER OUTER SQUARE/ ROUND SQUARE
MODEL DIAMETER DIAMETER OPENING MIN/MAX OPENING 2R Type
HT ONLY
DW -2R/2R Type HT 8" 12" 14" - 15" 16-1/2"
DW -2R/2R Type HT 10" 14" 16"- 17" 18-1/2"
DW -2R/2R Type HT 12" 16" 18"- 19" 20-1/2"
DW -2R/2R Type HT 14" 18" 20"-21" 22-1/2"
DW-2R/2R Type HT 16" 20" 22"-23" 24-1/2"
DW-3R/3Z 8" 14" 16"- 17" N/A
DW - 3R/3Z 10" 16" 18" - 19" N/A
DW - 3R/3Z 12" 18" 20" -21" N/A
DW-3R/3Z 14" 20" 22" -23" N/A
DW - 3R/3Z 16" 22" 24" -25" N/A
DW-3R/3Z 18" 24" 26" -27" N/A
DW-3R/3Z 20" 26" 28"-29" N/A
DW-3R/3Z 24" 30" 32"- 33" N/A
Annular Distance — Fire Stop Fig. 11 —Annular Distance
Grease duct / chimney are to be installed eccentrically or
concentrically within the fire stop system. The annular space between O.D.PLUS 3"MAX.
the grease duct/ chimney and the periphery of the opening shall be a _.._
minimum of 1" to a maximum of 2"for 1 and 2 hour fire rated floor and MIS.
wall assemblies. Grease duct / chimney will be rigidly supported on Z MAX.
both sides of the floor and or wall assembly. The F and T rating for the
fire stop systems shown below are rated for 2 hours. The fire stop
ratings are applicable only when Specified Technologies Series SSS F LOO RICE ILING.
Latex Intumescent (STI Triple S) Sealant is used. Annular distance is
measured perpendicular from the outside of the grease duct/chimney DUCT 0.D.
to the periphery of the opening (see Fig. 11 for details). 2R Type HT DUCT.
chimney requires 2 inch minimum annular distances all around.
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27
Annular Distance - 2R Type HT Clearance Fig. 12 — Fire Stop Plate
Chimney fire stop plates are used to maintain clearance 7-REDUCED HARD4VnPE
to combustibles for 2R Type HT listed chimneys. These CLEARANCE. /—
fire stop plates are not a substitute for through
penetration and fire stop plates referenced above and L S of e E�sLE
shown in Fig. 13 & 14. Chimney plates are designed to 1
center the chimney in the recommend opening and ! 2R SHELL
maintain 2" clearance to combustibles as shown in C.D•
Table 6 above. Chimney fire stop plates consist of two PvESTO \. 2'REDUCED
half plates; the plates are designed so they are inserted
into the opening. They are installed on the bottom side
of the floor. Frame or cut the opening in the floor, see
Table 6. Insert the chimney into the opening, and then 2R SHELL+41
insert one half of the fire plate. Secure the half plate
using appropriate hardware for wood or concrete construction per Fig. 10g & Fig 10h. Insert the second half
plate and secure. Once both plates are secure, the chimney will be centered in the opening with a 2"
clearance to combustibles. WARNING, clearance (air space) to combustibles will be free from any type of
insulation.
Fig. 12a — Chimney Fire Stop Plates
INSIDE CHIMNEY.
2R SHELL FLOOR.
T 4 1/2' 2R SHELL.
OPENING
2R SHELLr' -
JOIST. FLOOR.
TABLE b.
\—FIRE PLATE 1.
+
FIRE PLATE. FIRE PLATE 2.
HARDWARE.
HARDWARE.
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28
Floor & Ceiling Fire Stop Installation
1. Cut an opening in the floor/ceiling that is a minimum of 2" and maximum of 3" larger than the outside
diameter of the duct being installed (see Table 6).
2. The grease duct can be installed eccentrically or concentrically within the opening. The distance from
the outside of the grease duct to the periphery of the opening cannot exceed 2". 2" is the maximum
annular distance allowed (see Fig. 12).
3. Apply a continuous 1/2" bead of STI Triple S intumescent around the fire plates. The fire plates are
designed to fit around the duct and overlap by 1".
4. The fire plates are installed on the bottom side of the floor/ceiling. Push the plates up to the
floor/ceiling so the intumescent seals the plates against the floor/ceiling. Then secure using '/-20 x 1
'/2" long concrete fasteners where the plates overlap, secure using '/-20 x 1"sheet metal screws.
5. Seal the topside using the intumescent seal around the duct and fire plates. Seal the edge of the
opening to the fire plates.
6. Fill the cavity using (4) layers of insulation, make sure that all voids are filled. The insulation is fully
compressed into the opening until it is 3/4"from the top of the opening.
7. Cover the compressed insulation with intumescent. Continue until the intumescent is level with the
top of the opening. The intumescent should overlap on to the floor/ceiling, ensuring there are no
gaps between the edges of the opening or the duct outer shell.
8. Wrap one layer of 1"x 12" provided insulation around the base of the duct and enclose with the half
enclosure bands. The insulation and bands should be touching the intumescent, do not disturb or
compromise the intumesent when installing. The enclosure bands are assembled using '/4-20 x /"
hardware.
9. Install the vertical fire stop support; ensuring the full support ring is installed under the double V
band. Once in place, the legs are secured to the floor/ceiling using appropriate type and size
fasteners (see Fig. 12 for details).
Fig. 13 — Floor & Ceiling Fire Stop Installation
STEP 1 STEP 2
DUCT SECTION.
DUCT SECTION.
TOP SIDE.
SEE TABLE 6. TOP SIDE.
INTUMESCENT
SEALANT. FIRE PLATES INTUMESCENT
FIRE PLATES. CONCRETE SECURED. SEALANT,
SCREWS,
STEP 3 STEP 4
DUCT SECTION. DUCT SECTION.
DOUBLE V BAND.
TOP SIDE,
INSULATION.
INTUMESCENT- \ CONCRETE VERTICAL SUPPORT.
SEALANT. ANCHORS,
HALF CLOSURE HALF CLOSURE
BANDS, BANDS SECURED.
29
I
Wall Fire Stop Installation
1. Cut an opening in the wall that is a minimum of 2" and maximum of 3" larger than the outside
diameter of the duct being installed. See Table 6.
2. The grease duct can be installed eccentrically or concentrically within the opening. The distance from
the outside of the grease duct to the periphery of the opening cannot exceed 2". 2" is the maximum
annular distance allowed; see Fig. 12.
3. Apply a continuous 1/2" bead of STI Triple S intumescent around the closure plates; the fire plates are
designed to fit around the duct and overlap by V.
4. The fire plates are installed on the backside of the wall. Push the plates up to the wall so the
intumescent seals the plates against the wall. Then secure using '/-20 x 1 '/2" long concrete
fasteners where the plates overlap secure using '/4-20 x 1" sheet metal screws.
5. Apply a 3/" covering of intumescent sealant to the inside of the fire plates installed on the backside of
the wall. The sealant should be smooth and without any gaps on the edges of the opening or outside
of duct.
6. Fill the cavity using the insulation provided, ensuring that all voids are filled. The insulation is fully
compressed into the opening until it is 3/"from the edge of the opening in the wall.
7. Cover the compressed insulation with intumescent. Continue until the intumescent is flush with the
edge of the wall opening. The intumescent should overlap on to the wall, ensuring there are no gaps
between the edges of the opening or the duct outer shell.
8. Install the fire plates on the front side of the wall. Push the plates up to the wall so the intumescent
seals the plates against the wall. Then secure using '/-20 x 1 '/2" long concrete fasteners where the
plates overlap secure using '/-20 x 1" sheet metal screws.
9. Wrap one layer of 1"x 12" provided insulation around the base of the duct and enclose with the half
enclosure bands. The insulation and bands should be touching the intumescent. The enclosure
bands are assembled using '/-20 x 1" hardware. This is done on the front and back of the wall.
10. Horizontal supports are used to support the duct on either side of the wall. See Fig. 9 for details.
Fig. 14—Wall Fire Stop Installation
STEP 1 STEP 2
WALL.
FIRE PLATES. /--INSULATION. HALF CLOSURE
BANDS.
INSULATION.
DUCT SECTION.
CONCRETE , FIRE PLATES. I
-INTUMESCENT. 114-20 HARDWARE,
WALL.
FIRE PLATES. HORIZONTAL SUPPORT
EITHER,SIDE OF OPENING.
INTUMESCENT. ->' HALF CLOSURE
x
BANDS.
CONCRETE
SCREWS.
INSULATION. y DUCT SECTION.
114.20 HARDWARE.
DETAIL
30
Grease Duct lnstallat�ort ,
Grease Duct Assembly Examples
The illustration shown provides useful
Fig. 15 - Grease Duct Installation Guide information on =the instattation of grease ituct
systetns.: Each-=instalIatlon:ls specific to fhe:
application and the joh: site.if you encounter"a.
Adjustable duct and standard ducts are -sifuatibmhot'covered,6y this illustration, refer to
used to terminate at the transition plate. the guide or cor sultthi factory 7lie grease;duct._;
The duct section is fully welded to the systems illustrated in`thas1r►anual::have_"been,
transition plate at the factory. tested to and:cornply-with 0 2221,'lests of Fire
Resistive Grease Duct Enclosure Assernblles.-
EXHAUSTFAN,
VENTED CURB.
ROOF.
VERTICAL SUPPORT
INSTALLED UNDER —ADJUSTABLE DUCT.
THE DOUBLE V BAND.
DOUBLE V D D.
STANDARD D D U UCT LENGTH.
SEE TAB LE 5. IN SU LATE D ACC ESS
DOOR COVER ITEE.
y_
a' + STANDARD DUCT LENGTH.
t. r
DOUBLE V BAND.
STANDARD DUCT LENGTH.
FIRSTVERTICAL SUPPORT
45 DEGREE ELBOW, /� AT J OIN T#I AFTER CHAN 0 E
/ IN DIRECTION INSTALLED UNDER
ADJUSTABLE DUCT. L a THE DOUBLE V BAND.
INSULATED ACCESS
DOOR COVER/TEE. 112"THREADED ROD
MINIMUM.
/—ACCESS DOOR PROVIDED
-, —ACCESS
IN DIRECTION_
RISER COVERS, —
u
qq STANDARD DUCT LENGTH.
EXHAUST HOOD. ��N --SEE TABLE 4.
DUCT SENSOR.
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31
Fig. 16 - Grease Duct Installation Guide Grease Quct [nsta[[at[on
The ill,U§tfatlon shown provides,_ usefa[,'
Adjustable duct and standard ducts are information on the ins#allation ;of. grease;iuct
used to terminate at the transition plate. systems;° Eachnstaliation ,is specific to the
The duct section is fully welded to the application and the fob sate,' vou`,encounter a':,
transition plate at the factory. situation not covered-b this illustration, refer to:
St, guide or consult ttie factory ,The grease:duc#''
systems illustrated in=this rrianual `have..been
tes#ed,#a acid coinpiy with UL 2221.r Tests=of:Fire-
Resistive°Grease Duct EnciosuCe Assetn}alies;
EXHAUST FAN. VENTED CURB.
r
s ROOF.
` ADJUSTABLE DUCT.
VERTICALSUPPORT
INSTALLED UNDER
THE DOUBLE V BAND. _ _
-»»- �—DOUBLE V BAND_
TEE-ACCESS DOORS �- ~ STANDARD DUCT LENGTH.
CLEA N 0 UT P 01 NTS AFTER
CHANGE IN DIRECTION,
INSULATED ACCESS
FIRST VERTICAL SUPPORT DOOR COYER f TEE.
AT JOINT#9 AFTER CHANGE
IN DIRECTION INSTALLED UNDER
THE DOUBLE V BAND, SEE TABLE 5.
RISER COVERS.
HORIZONTAL SUPPORT,
SEE TABLE 4. EXHAUST HOOD HEIGHT
HOOD
Haoo
WIDTH
+cea WNG
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32
Fig. 17 - Grease Duct Installation Guide _ Grease Duct InstaI145q0
The illustration shown pr()v des, , useful?
Adjustable duct and standard ducts are mforrttatlon on the iris#atlaibn,;of`grease :duct `
used to terminate at the transition plate. systerns Eac>a "rnstaliat�on",is;s#secrf;c -to�'_the
The duct section is fully welded to the app lrcafon and the job s1te: if you encounter a
transition plate at the factory. situation not ctivered. Y iis Mustratiion, refdr to`-
the gurde or cgnsutt the facto +-The grease ducE
sys#erns alt Usti a#ed in this"-tnariva!;have`been'"
fes#eri t#and comply"wr#h t11-2221, Tests,o€-Frre"''
Res�sil�e Grease Duct Erictosure Assembtles ,
EXHAUST FAN. =�
ADJUSTABLE SECTION
VENTED CURB. TERMINATES AT THE
VENTED CURB. _ TRANSITION PLATE.
• ROOF. \\\
ADJUSTABLE
DUCT COLLAR.
ADJUSTABLE INSTALLED UNDE RT
1 DUCT SECTION. - IN SULATION THE DOUBLE V BAND
OUTER SHELL t }
REMOVED FOR
CLARITY,
STANDARD DUCT LENGTH. DOUBLE V BAND, STANDARD DUCT LENGTH.
DUCT SENSOR. DOUBLE V BAND. RISER COVERS,
DUCTSENSOR.
EXHAUST EXHAUST
HOOD HOOD
33
Chimney lnsmallatlon-
Fig. 18 - Chimney Installation Guide
The r11 tratian sown -provides useful
In ormatton on'.fhe. irsstalla#ion of=a chiit)rsey
system .',Each mstaliatrcin: .is specife to_'tfae
application anti the job slte. .lf you encounter a
situation not covered by this ilustra#ion, refer to
the guItle or cgnsult he facfory -Tle chimney;,,
systems:,illus#rated rn_;this .inanua{'_have been
tested to and ,cotnpty`with `.UL :1a3< Type Ti H
Eac#ory Built Ghimneys for.'Bonding Heating
Ajapliances
UL I43 t r
CAP. CAP.
TOP RISER MAX 8'-ROOF
COVER& SUPPORT ASSEMBLY } AIR SHAH'.
Y'BAND.— WITHOUTSUPPORT
uEr•e7ED MIN 2'
CURB. FROM ROOF FLty IGE RING.
TO P RISER
END CAP.
CON N CTION.
2R—I43 —--SINGLE'Y'BAND
CHIMhlEY.�
USED TO CONNECT
RRE STOP PL E - SEE TABLE 5. CAP TO CHIMNEY.
AT
USED FOR 2` TO?RISER
CLEARANlCE T O
COM USTABLES.° COVER& TOP RISER
Y'B r D. CONNECTION.
ir.RNSTROt
WALL
PLATE.—
VERTICAL COMBUSTIBLE
WALL SUPPOT.—\ SURF"ACE.
SEE TABLE 5.
FIRE STOP PLATE
USED FOR 2"
CLEARANCE TO
COMBUSTABLES.
2R 343
CHIMNEY.
caN1NECnar1 TO ,
EQUIPMENT EfIHER
WELDED OR BOLTED
FIELD MTALL4TION1.
EQUIPMENT.
t
34
i
Chimney Installation--
Fig. 19 - Chimney Installation Guide
Tile tliustratian shown- "provides useful
information on"the ii5stailatian of "a Chirrrney"
:system ;Each ,instaliatton ts=specific to "=the
application and the"Job site tf:you encounter a
situation,not covered iby this illustratirn, refer to.,-
ti►e guide or consult the factory The chimney'.
systems ;tllus#rated in,thfs tianual 'have,.been;
tested to and comply-with U _ G3 Type.)iT,:
FO or Ghtmneys for ,;Budding Heating
;.Appliances
VERTICAL FLOOR SUPPORT. BASE MOUNT CAP. BASE CAP— _r
/—VERTICAL TRANSITION CHIMNEY
SUPPORT PLATE. PLATE-� BASE CAP.
FIRE STOP.-
-VERTICAL VELD SEE TABLE 5.
SUPPORT RING. GASKET.
CURB.–_ GASKET.
VERTICAL
FLOOR. FIRE / SUPPORT.
STOPr -" I
5116-18X 1"SELF DRILLING '--CHIIv1NEY -
SCRMS USED TO SECURE
CHIA4NEY 2R SHELL.
1/4-20 WHIZ NUTS&BOLTS VERTICAL SEE TABLE 5.
SUPPORT.
USED TO SECURE THE
I SUPPORT RING.
MAXIMUM ANGLE NOT TO EXCEED
FIRE STOP 2"CLEARANCE. 30°=US
45'=CANADA
INS DE DOUBLE"V'BAND
FLOOR. �CHININEY. 1(2 THP ABOVE.SUPPORT
PLATES.
�---2R SHELL. ROD..
VERTICAL FLOOR "—V�P,TICAL WALL
SUPPORT WITH SUPPORT.
THREADED ROD
SEE FIG 9.B,FIG IOG.— WALL
t
--FIRE PLATE 1.
FIRE PLATE 2
TABLE b. 8'MAXIMUM
-HARDWARE. STRAIGHT LENGTH
30 DEGREES=US j
45 DEGREES=CANADA
i
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35
METHODS USED TO TEST DUCT AFTER ASSEMBLY
Prior to the concealment of any portion of a grease duct system, a leakage test shall be performed in the
presence of the code official. Duct shall be considered to be concealed when installed in shafts, or covered
by coatings or wraps that prevent the ductwork from being visually inspected on all sides. A light test or
approved equivalent test method (smoke test) shall be performed to determine that all joints are liquid tight.
The smoke test is used for longer duct runs while the light test is used for short duct runs; both methods are
approved for use.
Method 1 — Light Test per IMC 506.3.3.1
A light test shall be performed by passing a lamp having a power rating of not less than 100 watts through
the entire section of ductwork to be tested. The lamp shall be open so as to emit light equally in all directions
perpendicular to the duct walls. The test shall be performed for the entire duct system, including the hood-to-
duct connection. The ductwork shall be permitted to be tested in sections, provided that every joint is tested.
Method 2 — Smoke Test
After the ductwork has been installed allow the listed sealant to cure for a minimum of 24 hours. Smoke
bombs are lit and placed at the bottom of the duct system; natural upwards drafts will pull the smoke to the
top of the duct system. Various length duct runs may require multiple smoke bombs. Once the smoke has
reached the top of the duct run, cap the duct securely. Inspect all joints for leakage.
GENERAL DUCT WEIGHTS
The average weight of the duct, per foot of length, can be calculated using the following formulas below.
Duct design should provide adequate support to ensure duct components are not overloaded.
Weight — DW-2R
r The following formula can be used to approximate the weight of total length of DW-2R double wall duct.
Inner Shell + Outer Shell + Insulation or(.0327*L*D) + [.0218*L*(D+4)] + [.0364*L*(D+2)].
Weight — DW-3R
The following formula can be used to approximate the weight of total lengths of DW-3R double wall duct.
Inner Shell + Outer Shell + Insulation or(.0327*L*D) + [.0218*L*(D+6)] + [.0436*L*(D+3)].
Weight — DW-3Z
The following formula can be used to approximate the weight of total lengths of DW-3Z double wall duct.
Inner Shell + Outer Shell + Insulation or(.0327*L*D) + [.0218*L*(D+6)] + [.0491*L*(D+3)].
a
Weight — Example
The"D"value in the formulas above represents the inner duct diameter in inches. The"L"value in the
formulas above represents the total length in inches. Duct system: DW-3Z, 12" inner duct, 100 FT long.
Using the DW-3Z formula above, (.0327*1200*12) + (.0218*1200*18) + (.0491*1200*15) = 1825 lbs.
36
CLEANING & MAINTENANCE RECORD
Date Service Performed
Factory Service Department
Phone: 1-866-784-6900
Fax: 1-919-554-9374
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