DuraVent DVR Manuale utente

MODEL DVR (ROUND) TYPE-B

GAS VENT INSTALLATION

INSTRUCTIONS

Readthroughalloftheseinstructionsbeforebeginningyourinstallation.

Failuretoinstallasdescribedintheseinstructionswillvoidthemanufacturer’s

warrantyandmayhaveaneffectonyourhomeowner’sinsuranceandUL

listingstatus. Keeptheseinstructionsforfuturereference.

REFERENCES

(1)NationalFuelGasCode,alsoreferredtoasNFPA54andANSIZ223.1

(2)SimpsonDura-Vent'sSizingHandbook,availablefromSimpsonDura-

Vent CONTENTS

REFERENCES .......................................................................................... 1

GENERAL INFORMATION.................................................................. 1

PLANNING ............................................................................................... 2

STEPS FOR TYPICAL INSTALLATION ........................................... 4

BUCKET SUPPORT................................................................................ 9

COMBINATION TOP........................................................................... 10

ADJUSTABLE ELBOWS...................................................................... 11

MALE AND FEMALE ADAPTORS .................................................. 12

RELINING MASONRY CHIMNEYS.................................................. 13

MAINTENANCE .................................................................................... 19

GENERAL INFORMATION

Type B Gas Vents are for venting listed Natural Gas or Liquid Propane

CategoryIappliancesonly. Theapplianceslistedbelowtypically(butnotalways)

useTypeBventsystems.

Boilers Furnaces

WaterHeaters UnitHeaters

RoomHeaters DuctFurnaces

FloorFurnaces DecorativeGasAppliances

SimpsonDura-VentTypeBVentSystemsmaybeusedonothergas-burning

appliances,providedthemanufactureroftheappliancestatesintheirinstallation

instructionsthatTypeB-ventisacceptable. DonotuseTypeB VentsforCategory

MH6357

FLASHING

HIGH WIND TOP

DuraCap TOP

SEE TABLE 2

1 INCH MINIMUM

CLEARANCE

(ALL SIDES)

B-VENT

1 INCH MINIMUM

CLEARANCE

(ALL SIDES)

FIRESTOP

SPACER

DOTTED LINES

SHOW POSSIBLE

OFFSET IN ATTIC

SPACE

Fig 1

ENCLOSURE

CEILING SUPPORT

/FIRESTOP

VENT CONNECTS

TO APPLIANCE

STORM

COLLAR

II,III,orIVgasappliances. TypeBVentshallnotbeusedtovent flueproducts

fromincinerators,combinationgas/oilappliances,oil-fired,orwood-burning

appliances. If there is a question about the use of Type B Vents, contact the

appliancemanufacturerorSimpsonDura-Vent'sEngineeringDepartmentfor

furtherinformation. PLANNING

1.Appliances. Carefullyreviewtheappliancemanufacturer'sinstallation

instructionsforpositioningtheunit,anyspecialventingorconnectorrequire-

ments,andverifythatitisaCategoryIapplianceoranappliancethatrequires

the use of Type B gas vent.

2. Placement. The place-

mentoftheventandfittingsmust

be in accordance with Local

Codes, as well as accepted vent-

ing practices. If more than one

appliance is to be connected to

oneventingsystem,thecommon

ventmustbecorrectlysized. Itis

agoodideatomakeasketchofthe

proposed installation, labelling

the components you will need.

Adjustable Pipe Lengths are

availabletomakeupodd lengths.

Minimizethenumberofturnsand

lateral runs, as the National Fuel

Gas Code places limitations on

these. A45°turnispreferableto

a 90° turn. The appliance refer-

encematerialshouldbeconsulted

atthis time,as wellas any Local

Authorityhavingjurisdiction. In

most localities, building permits

are required for any new appli-

ances, or modifications to exist-

ingventingsystems.

3. Figures 1, 2, & 3

show examples of some

typical residential in-

stallations.

4. Clearance to

Combustibles. A1-inch

clearance(airspace)to

combustible materials

must be maintained,

when using Simpson

Dura-Vent Round B-

Vent,regardlessofthe

pipediameter.

5.CombustionAir.

Refertoapplianceinstal-

lationinstructionsandlo-

calbuildingcodestoen-

surecompliancewithre-

quired volume of com-

bustion air for each ap-

pliance installed .

6. Slope. Ifthevent-

ingsystem containslateral (horizontal)components, theyshall bepositioned

so they have an upwards slope away from the appliance of not less than 1/4-

inch rise per foot of run. (Horizontal vent installed in attics, unconditioned

area, or between floors have further restrictions, please consult your local

building codes for specific limitations.)

7.TerminationArea. Examinetheareawheretheventsystemwillterminate.

Theheightoftheterminationabovetheroofisdeterminedbythe roofpitch,and

alsoit'sproximitytoadjacentwallsorobstructions. ConsultTable2 onpage 9

for proper termination height requirements. Vent pipe with 3"-12" diameter

must terminate at least 2 feet higher than an adjacent wall or obstruction, if it

WATER HEATER

WITH DRAFT HOOD

LATERAL

FURNACE

CONNECTOR RISE

CEILING SUPPORT /

FIRESTOP

90° ADJUSTABLE

ELBOW

INCREASER

TOTAL

VENT

HEIGHT

B-VENT

PIPE

B-VENT TEE

WATER HEATER

CONNECTOR RISE

FAN ASSISTED

FURNACE

Fig 2

iswithin8 feet. Ventpipewith 14"or largerdiameter mustterminateat least

2 feet higher than an adjacent wall or obstruction, if it is within 10 feet.

8. Connector Rise. Plan a minimum of one foot vertical connector rise

comingout of eachappliance.

STEPS FOR TYPICAL INSTALLATION

1. Location. BuildingCoderequirestheappliance(s)tobelocatedasclose

totheventaspossible. Afterconsultingthelocalcodes,applianceinstallation

instructionsandanyotherapplicablereferencematerialdeterminetheoptimum

location for the appliance(s).

2. PenetrationPoint. Locateandmarkthecenterofthepenetrationpoint

through the ceiling or the wall. Refer to Step 3 or 4, as appropriate.

3. Ceiling Support. For a ceiling supported system, install the Square

Firestop/SupportasshowninFigures6,7,and8. TheFirestopSupportmust

beframed inand thedimensions are shownin Table1 andshown in Figure 4.

Dura-Connectinstallation

procedures are contained in a

separateinstruction,obtainable

fromyourDura-VentDealer,or

fromSimpsonDura-Vent. The

clearance to combustibles for

Dura-Connect is one inch. It

maynotbeusedtopassthrough

wallsor ceilings,nor mayit be

placedinatticsorcrawlspaces.

Itmaybeusedwhereversingle

wall connector pipe is used.

1 INCH MINIMUM

CLEARANCE

(ALL SIDES)

FURNACE

CONNECTOR RISE

B-VENT USED AS

CONNECTOR

45°/60°

ADJUSTABLE

ELBOW

DURA-CONNECT

FLEXIBLE SINGLE

WALL CONNECTOR

WATER HEATER

CONNECTOR RISE

LATERAL

TOTAL

VENT

HEIGHT

FAN

ASSISTED

FURNACE

WATER HEATER

WITH

DRAFT HOOD

Fig 3

B-VENT WYE

Firestop Supports are

currently manufactured for

pipe sizes of 3" through 12"

only. Larger sizes may be

locallyfabricatedfromsheet

metal, provided that the

mandatory 1-inch clearance

is maintained, the pipe is

adequatelysupported,andthe

installation is acceptable to

Local Authorities. In

multistory buildings, a Firestop/

Spacer must be provided at every

floor /ceiling level other than the

firstfloorwhichrequiresasupport.

4.WallThimble. Forathrough-

the-wall system, install the Wall

Thimble,asshowninFigure5. The

Wall Thimble is designed to ac-

commodate walls up to 6 inches

thick. If you have thicker walls, a

sleeve extension should be fabri-

cated and attached to the existing

sleeve . Do not fill the air space

between the B-vent Pipe Section

andtheWallThimblewithinsula-

tion,althoughanRTV-typesealant

may be applied around the flange

and nail heads if desired.

5.PipeAssembly. Sectionsof

SimpsonDura-Ventroundpipeare

joinedtogetherbyliningup the fe-

maleendofthelockinglugwiththe

maleendslot,pushingthemtogether,

andturningclockwisetotwistlock.

Refer to Figure 9. Sheet metal

screwsarenotneededfor3"through

PIPE SIZE STOCK NUMBER OF

CEILING SUPPORT FRAMED INSIDE

DIMENSIONS (X & Y)

FIG 4

3 INCH 1440 7-3/8" X 7-3/8"

4 INCH 1441 7-3/8" X 7-3/8"

5 INCH 1442 9-1/8" X 9-1/8"

6 INCH 1443 9-1/8" X 9-1/8"

7 INCH 1444 11-1/8" X 11-1/8"

8 INCH 1445 11-1/8" X 11-1/8"

10 INCH 1446 13-1/8" X 13-1/8"

12 INCH 1447 13-1/8" X 13-1/8"

Table1

EXISTING

SHEET ROCK

FRAMINGMEMBERS

REQUIRED FOR

SUPPORT

EXISTING

JOISTS

Fig 4

Fig 5

8" diameter pipe. However, if desired, use 1/

4-inchlongsheetmetalscrewsfor3"through8"

diameter pipe. Never penetrate the inner liner

withscrews. For10"through16"diameterpipe,

SimpsonDura-Vent recommendsusingamini-

mumof(4)3/8"sheetmetalscrewsperjoint,and

a minimum of (6) 3/8" sheet metal screws per

joint for 18" and larger diameters. Each Pipe

Section is labelled, and an arrow shows the

direction of the exhaust flow. For ceiling sup-

ported installations, place a Pipe Section, or

assembledPipeSections,throughtheholeinthe

SquareFirestopSupport,andtightentheClamp. TheClampwillrestinside

theCeilingSupport,andpreventthePipeSectionsfromdroppingdown. The

PipeSection(s)shouldprotrudeaminimumofoneinchbelowtheceiling. An

optional Pipe Collar is available for decorative purposes.

6. Connectors. Only Simpson Dura-Vent connectors should be used

betweentheappliancesandtheventingsystem. SomeappliancesrequireTypeB-

Ventasacompletededicatedsystemfromthefluecollaroftheappliancetothe

terminationofthevent totheoutsideatmosphere. SimpsonDura-Vent’slisted

flexible,single-wallcorrugatedaluminumconnector,called“Dura-Connect”can

HANGER

STRAPS

Fig 7

NAILS

(4 REQ)

B-VENT

PIPE

SECTION

PIPE COLLAR

(OPTIONAL)

CLAMP

Fig 8

CLAMP AND

HARDWARE

HANGER

STRAPS

CEILNG

SUPPORT

Fig 6

be used in many applications when a

B-Ventconnector is not required.

7. Elbows. When Elbows are re-

quired,strapthePipeSectionsand/or

Elbows in place using Wall Straps.

Supporttheoffsetsothattheweightof

theoffsettingpipeisnotbearingdownon

theelbows,asshowninFigure10.

8.TeesandWyes.TeesandWyes

areusedtocombineconnectorsfrom2

ormoreappliancesintoacommonvent

as shown in Figures 2 and 3. A Tee

should be used in a through-the-wall

application, (Figure 11), as they have a removable Tee Cap (available as a

separateitem)attachedtothebottom.ThisTeeCapmayberemovedinorder

to inspect the system, or to clean out debris or collected condensate from the

commonvent. WallStrapsshouldbepositionedeveryfourfeet tosupportthe

verticalcommonvent.

9.Enclosures. Anyportionoftheventwhichpassesthroughanoccupied

areamust be enclosed,to prevent accidental damage to the system,as well as

burns. Figure 1 (page 2) shows a

systemwhichpassesthroughanoccu-

pied second floor. Simpson Dura-

Vent doesnotrecommendinstallation

ofB-Vent Pipe onthe outsidewall of

a building, particularly in cold cli-

mates. If it is necessary to do this,

enclosetheoutsideportionofthesys-

teminachase,asshowninFigure11.

It would be wise to consult the Local

Authoritypriortoconstruction. Note

that the enclosure requires an access

door for inspection and maintenance

purposes.

10.Terminations.WherethePipe

Sectionspassthroughtheroof,ahole

must be cut to provide a minimum

STEP 1

STEP 2 STEP3

Fig 9

Fig 10

WALL

STRAPS

EXISTING

STRUCTURE

ELBOW GORES

WALL

STRAP

1 INCH

MINIMUM

CLEARANCE TO

COMBUSTIBLES

AT ALL POINTS

45/60°

ELBOW

CEILING SUPPORT

clearance (air space) of 1 inch

betweenthePipeandconstruc-

tionmaterials. Straightlengths

of pipe are run up above the

roof.(seetable2)ARoofFlash-

ing is placed down over the

pipe, and adjusted so it fits

tightlyagainsttheroof,withthe

PipeSectionheld in a position

maintainingthe1inchminimum

clearance from combustibles.

The Flashing is then nailed to

the roof. The roofing material

(shingles, asphalt paper, etc.)

shouldoverlapthetopedge(up-

hill side) of the Flashing. A

non-hardeningsealantshouldbe

used around the edges of the

flashingbasewhereitmeetsthe

roof, as shown in Figure 12.

Non-hardeningsealantisplaced

around the joint between the

Flashing and the vertical Pipe

SectionandtheStormCollaris

then placed over this joint, to

make a watertight seal. Add

sufficient Pipe Sections to at-

taintheheightspecifiedinTable

2. To connect the Top to the

pipe, hold Top by its collar,

slidecollaroverlockinglugsof

pipe, and twist-lock clockwise.

Tops of diameters greater than

16 inches do not twist-lock, but

are affixed with sheet metal

screws.

11. Inspection. This com-

Fig 11

1 INCH

MINIMUM

CLEARANCE

(ALL SIDES)

WALL STRAP FRAMED

ENCLOSURE

WALL

THIMBLE

WALL STRAP

REMOVABLE

ACCESS DOOR/PANEL

FOR CLEANNG AND

INSPECTION

TEE

TEE CAP

GAS

APPLIANCE

TOPS ARE

INTERCHANGEABLE

Fig 12

STORM

COLLAR

1 INCH

MINIMUM

CLEARANCE

1 INCH

MINIMUM

CLEARANCE

SEE

TABLE 2

SEALANT

DuraCap

TOP

HIGH

WIND

TOP

FLASHING

pletes the installation steps.

Conductafinalinspectionto

insure that all joints are se-

cure, the system is properly

supported, and is mechani-

callysound. Especiallyverify

that the one-inch clearance

tocombustiblesrequirement

has been met, and that ad-

equatecombustionairwillbe

furnishedto theappliance.

BUCKET SUPPORT

1. Description. The

BucketSupport(showninFigure13)is

for properly supporting the B-vent be-

tween 16 or 24-inch O.C. joists or

rafters, or for providing a transition fit-

ting

be-

tween

Dura-

Con-

nect

SingleWallConnectorandtheB-ventPipe

Sections. Amaximumof20feetofTypeB

Gas Vent may be supported. Note that the

BucketSupportmustbeinstalledpriortothe

sheetrock.

2. Assembly. After you have deter-

minedwheretheB-ventshouldbelocated,

assemble theBucketSupportandBrack-

ets. Nailtheassemblytothebottomsideof

the joist material as shown in Figure 14.

AftertheSupportBucketisinplace,scribe

and cut out a hole in the sheet rock 1/8"

largerthanthediameteroftheBucket,and



GAS VENT SYSTEMS USING VENT CAPS LISTED BY UNDERWRITER’S

LABORATORIES MAY TERMINATE IN ACCORDANCE WITHTHIS VENT

TERMINATION TABLE

ROOF PITCH MINIMUM HEIGHT

FEET METERS

FLAT TO 7/12 1 0.3

OVER 7/12 TO 8/12 1.5 0.46

OVER 8/12 TO 9/12 2 0.61

OVER 9/12 TO 10/12 2.5 0.76

OVER 10/12 TO 11/12 3.25 0.99

OVER 11/12 TO 12/12 4 1.22

OVER 12/12 TO 14/12 5 1.52

OVER 14/12 TO 16/12 6 1.83

OVER 16/12 TO 18/12 7 2.13

OVER 18/12 TO 20/12 7.5 2.29

OVER 20/12 TO 21/12 8 2.44

Table 2

Fig 13

Fig 14

CONTINUATION

OF B-VENT SYSTEM

B-VENT

BUCKET SUPPORT

RAFTER 16 OR

24 INCHES O.C.

NAIL

HERE

CEILING

SINGLE-WALL

CONNECTOR

(DURA-CONNECT)

nailintoplace. RunthePipeSectionsthroughtheholeintheBucketSupport,

connecttheDura-ConnectSingleWallConnector,andattachtheClampso

thatitrestsinsidetheBucket,andwill

supportthePipe. AdjustthePipetothe

desiredheightand tightentheClamp.

This will provide a complete engi-

neeredsupportsystem.

COMBINATION TOP

1.Description. TheCombination

Top,provides aneasily installed, safe

andefficientB-VentTopandFlashing,

asonelightweightunit. Thetwobasic

componentsandtheassembledunitare

showninFigure15. TheCombination

Topis designed to accommodate roof

pitches from flat to 6/12, and is avail-

ablefor3"through6"diameterB-Vent

pipe.

2.Location. Locatethepointinthe

underside of the roof where the system

is to penetrate, using a plumb bob or

level.

3.Hole.Removesufficientroofing

material to cut a hole in the roof which

will allow a minimum of 1 inch air

space between the B-Vent and com-

bustible roofing materials.

4. Flashing. Position the Flash-

ingsotheholeisdirectlyovertheend

of the pipe, as shown in Figure 16.

RunthetopedgeoftheFlashingunder

the roof covering, nail as required,

Fig 15

1" MINIMUM

Fig 16

Fig 17

APPLY SEALANT

ALONG TOP, LEFT,

AND RIGHT EDGES,

AND ON NAIL

HEADS

RUN TABS ON

FLASHING UP

THRU RAISED

SLOTS ON CONE

Fig 18

AND THEN

FOLD THEM

OVER TO

HOLD CONE

TO FLASHING

1-1/2 TO 3

INCHES

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