Harman XXV-TC Pellet Stove Installation guide

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2313-90-00680I

Installation Manual

Installation and Appliance Setup

INSTALLER: Leave this manual with party responsible for use and operation.

OWNER: Retain this manual for future reference.

Tested and approved for wood pellet fuel only. Burning of

any other type of fuel voids your warranty.

CAUTION

Hot glass will cause burns.

• Do not touch glass until it is cooled.

• NEVER allow children to touch glass.

• Keep children away.

• CAREFULLY SUPERVISE children in same room as

stove.

• Alert children and adults to hazards of high temperatures.

High temperatures may ignite clothing or other

ammable materials.

• Keepclothing,furniture,draperiesandotherammable

materials away.

HOT SURFACES!

Glass and other surfaces are hot

during operation AND cool down.

WARNING

Please read this entire manual before

installation and use of this pellet fuel-

burning room heater.

Failure to follow these instructions could

result in property damage, bodily injury

or even death.

• Donotstoreorusegasolineorotherammablevapors

and liquids in the vicinity of this or any other appliance.

• Donotoverre-Ifanyexternalpartstartstoglow,you

areoverring.Reducefeedrate.Overringwillvoid

your warranty.

• Complywithallminimumclearancestocombustibles

asspecied.Failuretocomplymaycausehousere.

WARNING

NOTE

To obtain a Frenchtranslation of this manual, please

contact your dealer or visit www.harmanstoves.com.

Pourobtenirunetraductionfrançaisedecemanuel,s’il

vous plaît contacter votre revendeur ou visitez www.

harmanstoves.com

Checkbuildingcodespriortoinstallation.

• Installation MUST comply with local, regional, state and

national codes and regulations.

• Contactlocalbuildingorreocialsaboutrestrictions

and installation inspection requirements in your area.

CAUTION

Model(s):

XXV-TC Freestanding Pellet Stove

NOTICE: SAVE THESE INSTRUCTIONS

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2323-90-00680I

TABLE OF CONTENTS

Installation Standard Work Checklist ............... 3

1 Product Specic and Important Safety Information

A.ApplianceCertication .......................4

B.GlassSpecications .........................4

C.MobileHomeApprovals ......................4

D.BTUSpecications ..........................4

E. Electrical Codes ............................4

F. California Safety Information ..................4

2 Getting Started

A. Design and Installation Considerations ..........5

B. Tools and Supplies Needed ...................6

C. Inspect Appliance and Components .............6

3 Framing and Clearances

A. Appliance Dimension Diagram .................7

B.Non-CombustibleMaterialsSpecication .........8

C.CombustibleMaterialsSpecication .............8

D.ClearancestoCombustibles ...................8

E. Floor Protection ............................9

F. MobileHomeInstallation .....................9

4 Termination Location and Vent Information

A. Vent Termination Minimum Clearances .........10

B. Chimney Diagram ..........................15

C.Venting&UseofElbows ....................16

D.OutsideAir ...............................18

E. Locating Your Appliance and Chimney ..........19

F. Draft ....................................19

G. Negative Pressure .........................19

H.AvoidingSmoke&Odors ....................20

I. Fire Safety ...............................21

J. Inspect Appliance & Components .............. 21

5 Appliance Setup

A. Unpacking ................................ 22

B.FireboxDraftandCombustionFanRPM ........22

C. Wireless Room Sensor ......................23

D. Flame Guide ..............................23

6 Reference Materials

A. Safety Reminders ..........................24

B. Wiring Diagram ............................25

Safety Alert Key:

• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.

• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.

• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

• NOTICE: Indicates practices which could cause damage to the stove or to property.

= Contains updated information



Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2333-90-00680I

Installation Standard Work Checklist

ATTENTION INSTALLER:

Follow this Standard Work Checklist

Thisstandardworkchecklististobeusedbytheinstallerinconjunctionwith,notinsteadof,theinstructionscontainedin

this installation manual.

Customer: ________________________________ Date Installed: __________________________

Lot/Address: ________________________________ Location of Stove: __________________________

________________________________ Installer: __________________________

Model: ________________________________ Dealer/Distributer Ph # __________________________

Serial Number: __________________________

WARNING! Risk of Fire or Explosion! Failure to install appliance to these instructions can lead to a  re

or explosion.

Appliance Install

Section 3 YES IF NO, WHY?

Requirednon-combustibleoorprotection     ________________________________

Veriedclearancestocombustible.      ________________________________

UnitisLeveledandsecured.       ________________________________

Venting/Chimney Section 4

VentingCongurationcompliestoventdiagrams.    ________________________________

Ventinginstalled,sealedandsecuredinplacewithproperclearances.  ________________________________

Exteriorwall/roofashinginstalledandsealed     ________________________________

Terminationsinstalledandsealed.      ________________________________

Electrical Section 1

120VACunswitchedpowerprovidedtotheappliance.    ________________________________

Checkoutletwithmulti-meterforpropervoltage.(115-120VAC)   ________________________________

 Recordvoltagereading:___________

Appliance Setup Section 5

Allpackagingandprotectivematerialsareremoved    ________________________________

Accessoriesinstalledproperly       ________________________________

Manualbagandallit’scontentsareremovedfrominsidetheappliance

andgiventopartyresponsibleforuseandoperation    ________________________________

Startedapplianceandveriedthatallmotorsandblowersoperate

astheyshould.         ________________________________

CheckeddraftusingaManometer.Recordreadings:__________  ________________________________

Duringoperation,verifythatthehopperlidswitch(Ifapplicable)

andpressureswitchareworkingproperlybybrieyopeningthehopper

lidandmaindoorandverifyingthatthefeedmotorisinterrupted.  ________________________________

HearthandHomeTechnologiesrecommendsthefollowing:

Photographingtheinstallationandcopyingthischecklistforyourle.

Thischecklistremainvisibleatalltimesontheapplianceuntiltheinstallationiscomplete.

Comments:Furtherdescriptionoftheissues,whoisresponsible(Installer/Builder/OtherTrades,etc.)andcorrectiveaction

needed__________________________________________________________________________________________

_________________________________________________________________________________________________

Commentscommunicatedtopartyresponsible____________________by________________________on__________

     (Builder/GenContractor)(Installer)   (Date)

04/23

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2343-90-00680I

A. Appliance Certication

B. Glass Specications

This appliance is equipped with 5mm mirrored ceramic

glass. Replace glass only with 5mm mirrored ceramic glass.

Please contact your dealer for replacement glass.

C. Mobile Home Approved

This appliance is approved for mobile home installations

when not installed in a sleeping room and when an outside

combustionairinletisprovided.

Thestructuralintegrityofthemobilehomeoor,ceiling,and

wallsmustbemaintained.Theappliancemustbeproperly

groundedtotheframeofthemobilehomeanduseonlylisted

pellet vent, Class “PL” connector pipe.

A Harman® Outside Air Kit must be installed in a mobile

home installation.

Note: This installation must conform with local codes.

Intheabsenceoflocalcodesyoumustcomplywiththe

ASTM E1509-2012, ULC S628-93, (UM) 84-HUD

* Weighted average LHV eciency using data collected

during EPA emissions test.

**Weighted average HHV eciency using data collected

during EPA emissions test.

***ArangeofBTUoutputsbasedonEPADefaultEciency

andtheburnratesfromthelowandhighEPAtests.

****Basedonthemaximumfeedrateperhourmultipliedby

approximately8600BTU’swhichistheaverageBTU’sfrom

a pound of pellets.

E. Electrical Codes

115VAC,60Hz,Start3.5AMPS,Run2.5AMPS

D. BTU & Eciency Specications

Note: Hearth&HomeTechnologies,manufacturerofthis

appliance, reserves the right to alter its products, their

specicationsand/orpricewithoutnotice.

1 1 Product Specic and Important Safety Information

THE STRUCTURAL INTEGRITY OF THE MANUFACTURED

HOME FLOOR, WALL, AND CEILING/ROOF MUST BE

MAINTAINED.

DO NOT INSTALL IN SLEEPING ROOM.

WARNING

Note: Somegeneratororbatteryback-upsystemsmay

not be compatible with the micro-processor electronics

on this appliance. Please consult the power supply

manufacturerforcompatiblesystems.

EPA Certication Number: 55-16

EPA Certied Emissions: 1.75g/hr

*LHV Tested Eciency: 77.5%

**HHV Tested Eciency: 72.5%

***EPA BTU Output: 7,100-35,300

****BTU Input 11,000-48,000

Vent Size: 3 Inch

Hopper Capacity: 65lbs

Fuel: Wood Pellet

MODEL: XXV-TCPelletStove

LABORATORY: OMNITestLaboratories,Inc

REPORT NO. 0135PS014S & 0135PS033E

TYPE: PelletFueled/SupplementaryFor

Residential Use

STANDARD(s): ASTME2779-10,ASTEME2515-

11,ASTME1509-04,ULC-S627-00

ELECTRICAL

RATING

115 VAC, 60 Hz, Start 4.2 Amps,

Run 2.8 Amps

GLASS

SPECIFICATIONS 5mm mirrored ceramic glass

Harman® is a registered trademark of Hearth & Home

Technologies.

F. California Safety Information

The XXV-TCisCertiedtocomplywith2020

particulate emission standards.

This product and the fuels used to operate this product

(wood), and the products of combustion of such fuels,

can expose you to chemicals including lead and carbon

black, which is known to the State of California to cause

cancer,andcarbonmonoxide,whichisknowtotheStateof

Californiatocausebirthdefectsorotherreproductiveharm.

For more information go to: www.P65Warnings.ca.gov

WARNING

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2353-90-00680I

Design and Installation Considerations

1. Appliance Location

Marginal Location:

• Below peak

Location NOT recommended:

• Not the highest point of the roof

• Wind loading possible

Multi-level Roofs

Windward

Leeward

Recommended:

Outside Air Intake

on windward side

NOT recommended:

Outside Air Intake

on leeward side

Recommended Location:

• Above peak

Recommended:

• Insulated exterior chase

in cooler climates

Recommended Location:

• Above peak

• Inside heated space

Location NOT recommended:

• Too close to tree

• Below adjacent structure

• Lower roof line

• Avoid outside wall

Marginal Location:

• Wind loading possible

Figure 2.1

2 2 Getting Started

Sincepelletexhaustcancontainash,sootorsparks,you

must consider the location of:

• Windows

• Air Intakes

• Air Conditioner

• Overhang,sots,porchroofs,adjacentwalls

• Landscaping, vegetation

When locating vent and venting termination, vent above

rooflinewhenpossible.

• Installation MUST comply with local, regional, state and

national codes and regulations.

• Consult insurance carrier, local building inspector, re

ocialsorauthoritieshavingjurisdictionoverrestrictions,

installation inspection and permits.

Itisagoodideatoplanyourinstallationonpaper,usingexact

measurementsfor clearances andoor protection, before

actuallybeginningtheinstallation.

Considerationmustbegivento:

• Safety,convenienceandtracow.

• Placement of the chimney and chimney connector.

• If you are not using an existing chimney, place the

appliance where there will be a clear passage for a

factory-builtlistedchimneythroughtheceilingandroof.

• Installing an optional outside air kit would aect the

location of the vent termination.

NOTE: Check building codes prior to installation.

NOTE: Locating the appliance in a location of considerable

air movement can cause intermittent smoke spillage from

appliance. Do not locate appliance near:

• Frequently open doors

• Central heat outlets or returns

WARNING

Risk of Fire!

Damaged parts could impair safe operation.

Do NOT install damaged, incomplete or

substitute components.

Installation and service of this

appliance should be performed by

quali ed personnel. Hearth & Home

Technologies recommends HHT

Factory Trained or NFI certified

professionals.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2363-90-00680I

• Reciprocating Saw

•Hammer

• Phillips Screwdriver

• Tape Measure

• Level

•Non-CombustibleSealant

• Gloves

• Safety Glasses

• Electric Drill & Bits

May also need:

• Vent Support Straps

• Venting Paint

B. Tools And Supplies Needed

Tools and building supplies normally required for

installation, unless installing into an existing masonry

replace:

C. Inspect Appliance and Components

• Carefully remove the appliance and components from the

packaging.

• Report to your dealer any parts damaged in shipment,

particularly the condition of the glass.

• Read all of the instructions before starting the

installation. Follow these instructions carefully during

the installation to ensure maximum safety and benet.

DO NOT:

• Install or operate a damaged appliance.

• Modify appliance.

• Install other than as instructed by Hearth & Home

Technologies.

• Operate the appliance without fully assembling all

components.

 • Overre.

• Install any component not approved by Hearth &

Home Technologies.

• Install parts or components not Listed or approved.

• Disable safety switches.

Improper installation, adjustment, alteration, service or

maintenance can cause injury or property damage.

Forassistanceoradditionalinformation,consultaqualied

installer, service agency or your dealer.

Hearth&HomeTechnologiesdisclaimsanyresponsibility

for,andthewarrantywillbevoidedbythefollowingactions:

• Installation and use of any damaged appliance or vent

system component.

• Modicationoftheapplianceorventsystem.

• InstallationotherthanasinstructedbyHearth&Home

Technologies.

• Installation and/or use of any component part not

approvedbyHearth&HomeTechnologies.

Any such action may cause a re hazard.

WARNING

Risk of Fire, Explosion or Electric Shock! DO NOT use

this appliance if any part has been under water. Call a

qualied service technician to inspect the appliance

and to replace any part of the control system which

has been under water.

WARNING

RISK OF FIRE OR EXPLOSION!

DAMAGED PARTS COULD IMPAIR SAFE

OPERATION. DO NOT install damaged,

incomplete or substitute components.

Keep appliance dry.

Thiswoodheaterhasamanufacturer-setminimumlowburn

ratethatmustnotbealtered.Itisagainstfederalregulations

to alter this setting or otherwise operate this wood heater

in a manner inconsistent with operating instructions in this

manual.

This wood heater needs periodic inspection and repair for

proper operation. It is against federal regulations to operate

this wood heater in a manner inconsistent with operating

instructions in this manual.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2373-90-00680I

3 3 Clearances

Figure 3.1

A. Appliance Dimension Diagram

Dimensions are actual appliance dimensions. Use for reference only.

28-7/16”

722 mm

31-1/8”

791 mm

29-7/16”

748 mm

26-3/4””

679 mm

28-5/8””

727 mm

24-3/8””

619 mm

4-1/16”

103mm

14-3/4”

375mm

8-11/16”

228mm

12-1/2”

318m

Outside Air

Intake

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2383-90-00680I

Floor Protection

NOTICE

Clearancesmayonlybereducedbymeansapprovedby

the regulatory authority having jurisdiction.

Duetohightemperatures,thestoveshouldbeplacedaway

fromtrac,furnitureanddraperies.

Childrenandadultsshouldbealertedtothehazardsof

high surface temperatures and should stay away to avoid

burnstoskinand/orclothing.

Youngchildrenshouldbecarefullysupervisedwhenthey

are in the same room as the stove.

Clothing and other ammable materials should not be

placed on or near this unit.

Figure 3.2

3" (76mm)

6" (152mm)

12" (305mm)

CAUTION

THIS APPLIANCE MUST BE VENTED TO THE OUTSIDE.

WARNING

RISK OF FIRE OR BURNS! Provide adequate

clearance around air openings and for service

access. Due to high temperatures, the appliance should

be located out of trac and away from furniture and

draperies.

Illustrations reect typical installations and are FOR

DESIGN PURPOSES ONLY. Actual installation may vary

due to individual design preference.

Placethestoveawayfromcombustiblewallsatleastasfar

as shown in Figure 3.2.

Notethattheclearancesshownareminimumforsafetybutdo

not leave much room for access when cleaning or servicing.

Please take this into account when placing the stove.

Alternate oor protector dimension may be used as long

as they satisfy the measurement requirements shown

below.

When installing the unit into an alcove it is important to

considertherequiredclearanceslistedbelow.

Floor Protection

6.25”

(159mm)

6.25”

(159mm)

B. Non-Combustible Materials Specication

Materialwhichwillnotigniteandburn.Suchmaterialsare

thoseconsistingentirelyofsteel,iron,brick,tile,concrete,

slate,glassorplasters,oranycombinationthereof.

Materials that are reported as passing ASTM E 136,

Standard Test Method for Behavior of Materials in

a Vertical Tube Furnace at 750° C and UL763 shall be

considerednon-combustiblematerials.

C. Combustible Materials Specication

Materials made of or surfaced with wood, compressed

paper,plantbers,plastics,orothermaterialthatcanignite

andburn,whetherameproofedornot,orplasteredorun-

plasteredshallbeconsideredcombustiblematerials.

D. Clearances to Combustibles

When selecting a location for the appliance it is important to

considertherequiredclearancestowalls(seeFigure3.2).

Note: Top of unit must be a minimum of 12” (305mm) to

ceiling

60” High

53-7/16” Wide

Minimum Height = 60”, Minimum Width = 53-7/16, Maximum Depth = 36”

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2393-90-00680I

Floor Protection

Requirements US Canada

JSides 6" 152mm

KFront 6” 152mm

LRear 0” 0mm

F. Mobile Home Installation

When installing this unit in a mobile home several

requirementsmustbefollowed(ReferenceHUDRegulation

#24CFR3280):

• Theunitmust be bolted totheoor.Thiscanbedone

using an appropriate fastener for the application.

• Theunitmustbeconnectedtooutsideair.

See “

Termination

Location and Vent Information” Section D

• Floor protection and clearances must be followed as

shown.

• Theappliancemustbeproperlygroundedtotheframeof

themobilehomeusingaminimumof8AWGcoppersolid

orstranded,insulatedorbarewireorequivalent.

Corner Installation:

Minimumsizeoorprotectionforacornerinstallationhearth

pad is 29-7/16”WideBy27-3/4”Deep(724mmX705mm).

Note: Floor protector WILL NOT touch the wall using

minimum clearances.

Ifcorneroorprotectionisdesiredtotouchthewall,theoor

protectionwillneedtobeatleast42-1/4”x42-1/4”(1073mm

x1073mm).Note: This will allow the oor protection to

touch the wall as shown. Figure 3.4.

Alternateoorprotectordimensionmaybeusedaslongas

theysatisfythemeasurementrequirementsshownbelow.

Figure 3.4

Floor protector

E. Floor Protection

Figure 3.3

Floor protector

Door Opening

Parallel Installation:

Placethestoveonanoncombustibleoororoorprotector

thatextendsaminimumof6inches(152mm)tothefrontof

theloaddooropening,6inches(152mm)tothesidesofthe

door opening, and 0 inches to the rear.

Theminimumoorprotectormaterialis20gaugesheetmetal.

Otheroorprotectormaterialsareceramictile,stone,brick,

etc. Figure 3.3. Note: There is no required oor protection

from the rear of the unit. The oor protection should be

ush with the rear most edge of the unit, but does not

need to extend any further.

MinimumSizeoorprotectionis29-7/16”WideBy27-3/4”

Deep(724mmX705mm).Figure3.3.

Alternate oor protector dimension may be used as long

as they satisfy the measurement requirements shown

below.

Venting:

US-Follow PL vent manufacturers recommendations when

conguringventpipeinstallation.

Canada-Mustextend2”(51mm)beyondeachsideofany

horizontaluepipe.

CAUTION

HearthandHomeTechnologiesdoesnotrecommendadhesive

based vinyl ooring due to thermal expansion. Floating-style

ooring(LVP-luxuryvinylplankorLVT–luxuryvinyltile)canbe

used,butitwillreachtemperaturesupto110°Finaroomwith

ambienttemperatureof70°F.Consultooringspecicationsto

ensurecompatibility.

HHTrecommendswoodstovesandinsertshave29inchesof

alternativeooringinfrontofthestovebeforeusingLVP/LVT

regardless if they sit ush on the oor or are elevated on a

raised hearth. .

Forallotherooring,continuetofollowclearancetocombustible

requirements in the installation manual.

NOTICE: Clearances that do not meet the minimum guidelines

couldresultindamageorbucklingtothevinylooringandis

done at the installer’s risk.



Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2310 3-90-00680I

4 4 Termination Location and Vent Information

A. Vent Termination Minimum Clearances

Figure 4.1

Figure 4.2

Note: Follow venting manufacturer’s recommendations

for sealing pipe joints.

#1 Preferred method (Figure 4.1)

Thismethodprovidesexcellentventingfornormaloperation

andallowsthestovetobeinstalledclosesttothewall.Two

inches from the wall is safe; however, four inches allows

betteraccesstoremovetherearpanel.Theverticalportionof

theventshouldbethreetovefeethigh.Thisverticalsection

will help provide natural draft in the event of a power failure.

Note: Do not place joints within wall pass-through.

THE CHIMNEY MUST BE OF A TYPE SUITABLE FOR

SOLID-FUEL BURNING.

#2 Preferred method (Figure 4.2)

This method also provides excellent venting for normal

operationbutrequiresthestovetobeinstalledfartherfrom

thewall.Theverticalportionoftheventshouldbethreeto

vefeethighandatleast1”fromacombustiblewall.This

vertical section will provide natural draft in the event of a

power failure.

If the stove is installed below grade be sure the vent

termination is at least 12" above grade (with outside air

only). The outlet must also be 12” from the house/building.

Note: Do not place joints within wall pass-through.

CAUTION

Keep combustible materials (such as grass, leaves,

etc.) at least 3 feet away from the ue outlet on the

outside of the building.

3 Ft.

Combustibles

3 Ft.

to Combustibles

3 Ft.

Combustibles

3 Ft.

to Combustibles

DO NOT USE MAKESHIFT COMPROMISES WHEN

INSTALLING THIS APPLIANCE. DAMAGE AND/OR

INJURY MAY RESULT.

CAUTION

WARNING

THE CHIMNEY AND CONNECTOR MUST BE

MAINTAINED IN GOOD CONDITION AND KEPT CLEAN.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2311 3-90-00680I

Figure 4.3

Figure 4.4

#3 Installing into an existing chimney (Figure 4.3)

Thismethodprovidesexcellentventingfornormaloperation.

This method also provides natural draft in the event of a

powerfailure.Ifthechimneyconditionisquestionable*you

may want to install a liner as in method #6.

*The chimney should be inspected and cleaned before

installing your stove. If you discover that the chimney does

nothaveaclaytilelinerorhascracksorakingofthetile

liner you will need to install a stainless steel liner within

the chimney. In most cases the inside diameter of this liner

shouldbe4".Eitherexibleorrigidlinermaybeusedforthis

purpose. Refer to Method 5 & 6.

Besuretodesigntheventingsothatitcanbeeasilycleaned.

#4 Installing into an existing replace chimney (Figure 4.4)

Thismethodprovidesexcellentventingfornormaloperation.

This method also provides natural draft in the event of a

powerfailure.Ifthechimneyconditionisquestionable*you

may want to install a liner as in method #5.

In some places in the US and Canada it is required that the

ventpipeextendallthewaytothetopofthechimney.

*The chimney should be inspected and cleaned before

installing your stove. If you discover that the chimney does

nothaveaclaytilelinerorhascracksorakingofthetile

liner you will need to install a stainless steel liner within

the chimney. In most cases the inside diameter of this liner

shouldbe4".Eitherexibleorrigidlinermaybeusedforthis

purpose. Refer to Method 5 & 6.

The chimney should be sealed at the damper using a

steel plate. Kaowool, mineral wool or an equivalent non-

combustibleinsulationisrecommendedtobeinstalledontop

ofthesealingplatetoreducethepossibilityofcondensation.

The connector pipe should extend through the smoke

chambertothebaseorintotherstuetile.

Besuretodesigntheventingsothatitcanbeeasilycleaned.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2312 3-90-00680I

#5 Installing into an existing replace chimney (Figure

4.5) w/Full Liner

Thismethodprovidesexcellentventingfornormaloperation.

This method also provides natural draft in the event of a

power failure.

In some places in the US and Canada it is required that the

ventpipeextendallthewaytothetopofthechimney.

Inthismethodacapshouldalsobeinstalledonthechimney

to keep out rain. Be sure to use approved pellet vent pipe

ttings.Pipesizeshouldbeincreasedto4"usingthismethod.

Inthismethodacapshouldalsobeinstalledonthechimney

to keep out rain.

#6 Installing into an existing chimney (Figure 4.6) w/Full liner

Thismethodprovidesexcellentventingfornormaloperation.

This method also provides natural draft in the event of a

power failure.

In some places in the US and Canada it is required that the

ventpipeextendallthewaytothetopofthechimney.The

pipeorlinerinsidethechimneyshouldbe4"diameter.

Inthismethodacapshouldalsobeinstalledonthechimney

to keep out rain.

Figure 4.5

Figure 4.6

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2313 3-90-00680I

12"

min. wall to outlet

36"

min. clearance to any

combustable material

#7 Installing through the ceiling (Figure 4.7)

Follow PL vent manufacturers recommendations when using

wall and ceiling pass through.

Note: Do not place joints within wall pass-through.

Figure 4.7

Figure 4.8

Figure 4.9

Area within dotted circle represents the minimum clearance to

combustible materials such as shrubbery, mulch or tall grasses.

12"

min. above ground level

Minimum ue vent conguration

It is recommended that outside air be

installed with this venting conguration.

Smoke spillage may be possible during

a power outage.

PL vent manufacturer's

restop spacer and support

1" MIN.

No insulation or other

combustible materials

are allowed within 1"

of the PL vent pipe.

ashing

storm collar

1" MIN.

12" MIN

1” MIN.

DO NOT USE MAKESHIFT COMPROMISES WHEN

INSTALLING THIS APPLIANCE. DAMAGE AND/OR

INJURY MAY RESULT.

CAUTION

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2314 3-90-00680I

Optional Top Vent Pipe Clearances #8 Installing into an existing chimney using the Optional

Top Vent option. (Figure 4.10)

Thismethodprovidesexcellentventingfornormaloperation.

This method also provides natural draft in the event of a

powerfailure.Ifthechimneyconditionisquestionable*you

may want to install a liner as in method #6.

In some places in the US and Canada it is required that the

ventpipeextendallthewaytothetopofthechimney.

*The chimney should be inspected and cleaned before

installing your stove. If you discover that the chimney does

nothaveaclaytilelinerorhascracksorakingofthetile

liner you will need to install a stainless steel liner within the

chimney.

Besuretodesigntheventingsothatitcanbeeasilycleaned.

4"/102mm from back of top

ue vent to wall

Minimum 6” (25mm)

from top of pipe to ceiling

6"/152mm from

pipe to wall

View of Top Vent Option Installed

Chimney Connectors

• Follow venting manufacturer’s recommendations for

sealing pipe joints.

Figure 4.10

Single wall 6” Chimney

connector

Measurement from the oor to the top

of the Top Flue Option is 33” (838mm)

33”

Measurementfromoortothebeginningofthe6”ventcollar.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2315 3-90-00680I

B. Chimney Diagram

V=Vent Terminal A=Air Supply Inlet =Area where termination is not permitted

Door

Sidewalk

Fixed

Closed

Openable

Openable Fixed

Closed

Inside Corner

Detail

Porch or

Openable

Deck

or Fixed

Requirements for Terminating the Venting

Figure 4.10

I. The clearance to service regulator vent outlet must be a

minimum of 6 feet.

J. Theclearanceto anon-mechanicalairsupplyinlet tothe

buildingorthecombustionairinlettoanyotherappliance

mustbeaminimumof48”.

K. Theclearance toamechanicalair supplyinletmustbe a

minimum of 10 feet. (with outside air installed, 6 feet)

L. Theclearanceaboveapavedsidewalkorapaveddriveway

locatedonpublicpropertymustbeaminimumof7feet.

M. Theclearanceunderaveranda,porch,deckorbalconymust

beaminimumof12inches. (B. also)

The clearance to vegetation and other exterior combustibles

such as mulch is 36” as measured from the center of the

outlet or cap. This 36” radius continues to grade.

Certain Canadian and or Local codes or regulations may require

dierentclearances.

Aventshallnotterminatedirectlyaboveaside-walkorpaved

drivewaywhichislocatedbetweentwosinglefamilydwellings

andservesbothdwellings.

Onlypermittedifveranda,porch,deck,orbalconyisfullyopen

onaminimumof2sidesbeneaththeoor.

See NFPA 211 for more installation clearance reductions

when using outside air.

Where passage through a wall, or partition of combustible

construction is desired, the installation shall conform to

CAN/CSA-B365. (if in Canada)

WARNING

Venting terminals must not be recessed into a wall

or siding.

Only PL vent pipe wall pass-through and re stops should

be used when venting through combustible materials.

Always take into consideration the eect the prevailing wind

direction or other wind currents will cause with yash and

/or smoke when placing the termination.

In addition, the following must be observed:

A. Theclearanceabovegrademustbeaminimumof12”.

B. Theclearancetoawindowordoorthatmaybeopenedmust

beaminimumof48”totheside,48”belowthewindow/door,

12”abovethewindow/door. (with outside air installed, 12”

to side and below)

C. A 12” clearance to a permanently closed window is

recommended to prevent condensation on the window.

D. Theverticalclearancetoaventilatedsotlocatedabovethe

terminalwithinahorizontaldistanceof2feet(60cm)from

thecenter-lineoftheterminalmustbeaminimumof18”.

E. Theclearancetoanunventilatedsotmustbeaminimum

of 12”.

F. The clearance to an outside corner is 11” from center of pipe.

G. The clearance to an inside corner is 12”.

H. Aventmustnotbeinstalledwithin3feet(90cm)abovea

gas meter/regulator assembly when measured from the

horizontalcenter-lineoftheregulator.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2316 3-90-00680I

C. Venting & Use of Elbows

Figure 4.11

= Positive static pressure

= Negative static pressure

Harmanpelletstovesdependonacombustionfantopullair

throughtheunitforcombustion.Theventingsystemrestricts

theabilityofthecombustionfantomovetherequiredamount

of air through the unit. A system with too much resistance

willresultinincompletecombustion,morefrequentrequired

cleaning and poor unit performance. It is always best to

choose a location for the appliance that will result in a venting

systemwiththeshortestequivalentventlength(EVL).

ItisbesttohaveyourventingsystemdesignedbyaHarman

authorizeddealerbeforeyounalizeyourpurchaseofan

appliance.

Equivalent Vent Length: The equivalent vent length for

common pellet vent components are:

•90°ElbowsorTee:5EVLUnits

•45°elbow:3EVLUnits

• Vertical Pipe or Liner: ½ EVL Unit

•HorizontalPipeorliner:1EVLUnit

The total allowable equivalent vent length is:

• 20 EVL for 3” pellet vent pipe or liner.

• 30 EVL for 4” pellet vent pipe or liner.

Duetothepotentialforyashaccumulationinhorizontal

ventingsections,themaximumpermissiblehorizontalventing

length is:

• 4 ft. for 3” & 4” pellet vent pipe.

Example: First Floor Installation

Aunitistobeinstalledusing3”PelletVentPipewith3

feet of horizontal pipe, a Tee, 10 feet of vertical pipe, a

90°elbowandaterminationcap.

The equivalent vent length is:

3ft.ofHorizontalPipe(1x3EVL) =3EVL

90°ElboworTee(1xEVL)  =5EVL

10ft.ofVerticalPipe(10x.5EVL) =5EVL

90°ElboworTee(1xEVL)  =5EVL

TerminationCap   =0EVL

EquivalentVentLength   =18EVL

Intheexamplesystemdetailedabove,theEVLwas18

whichislessthanthemaximumof20EVLfor3”pellet

ventpipe,thusthisisasatisfactoryventingconguration.

Example: Connection to Masonry Chimney

Aunitistobeinstalledusing3”PelletVentPipewith2

feet of horizontal pipe, a Tee, 4 feet of vertical pipe, an

elbow,aTee,21feetofverticalliner,andatermination

cap.

The equivalent vent length is:

2ft.ofHorizontalPipe(1x2EVL) =2EVL

90°Tee(1x5EVL)   =5EVL

4ft.ofVerticalPipe(4x.5EVL) =2EVL

90°Elbow(1x5EVL)   =5EVL

90°Tee(1x5EVL)   =5EVL

21ft.ofVerticalLiner(21x.5EVL) =10.5EVL

TerminationCap   =0EVL

EquivalentVentLength   =29.5EVL

In the example system detailed above, the EVL was

29.5whichexceedsthemaximumof20ft.for3”pellet

ventpipe,thus3”vent pipe should not be used in this

installation.However,since4”pipecansupportanEVL

up to 30, the use of 4” pipe would create a satisfactory

installation.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2317 3-90-00680I

C. Venting & Use of Elbows continued

Note:Whentheamountofverticalpelletventpipeinthesystemexceeds15feet,4”pelletventpipeshouldbeused.

Note: Equivalent Venting Length decreases as altitude increases.

Example:

AunitwithanEVLof13,istobeinstalledatanaltitude

of3,000feetabovesealevel.

From the chart to the left, at 3,000 feet of altitude, the

maximum permissible equivalent venting length is 26

feet.

However,ifthesameunit(EVL13)wastobeinstalled

analtitudeof9,000feetabovesealevel,theinstallation

wouldnolongerbeacceptableandtheequivalentvent

lengthofthepipewouldhavetobereducedforproper

unit operation.

No Change of Combustion

Blower Fan Blade Needed

0 Ft5 Ft 5 Ft

10,000

9,000

8,000

7,000

6,000

5,000

4,000

3,000

5 Ft

0 Ft

10 Ft

Combustion Blower Fan

Blade Changeover Line

Altitude

10 Ft

15 Ft

20 Ft

25 Ft

30 Ft

5 Ft

0 Ft

15 Ft

Equivalent Vent Length (EVL)

Maximum Horizontal Run

• LongrunsofexorPLventpipeinstalleddirectlyverticalfromtheuestubmayrequiremorefrequentcleaningdueto

yashfallingoinsideandcollectingdirectlyabovethecombustionbloweroutlet.

• 4" stainless steel ex vent piping is only allowed for use in masonry replaces and chimneys or factory built wood-

burningreplaceswithClassAmetalchimneys.

• Allpelletventpipemustbesecuredtogethereitherbymeansprovidedbythepipemanufacturerorby3screwsateach

joint.

• Useonlythespeciedventingcomponents.Useofanyothercomponentswillvoidtheproductwarrantyandmaypose

a hazard.

• DoNotInstallaFlueDamperInTheExhaustVentingSystemofThisAppliance.

• DONOTCONNECTTHISUNITTOACHIMNEYFLUESERVINGANOTHERAPPLIANCE.

• SimpsonDuraVentPelletVentProHarman®AdapterPart#3PVP-ADHBandPelletVentProHarman®AdapterIncreaser

Part#3PVPX4ADHBarehighlyrecommendedtobeinstalledonthestartercollartoinsureaproperpipeconnectionto

the unit.

• INSTALL VENT AT CLEARANCES SPECIFIED BY THE VENT MANUFACTURER.

• Usesiliconetocreateaneectivevaporbarrieratthelocationwherethechimneyoroutsideairductingpassesthrough

totheexteriorofthestructure.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2318 3-90-00680I

Outside Air:

Hearth & Home Technologies recommend attaching

outside air in all installations, especially lower level and

main oor locations.

Pernationalbuildingcodes,considerationmustbegivento

combustionairsupplytoallcombustionappliances.Failure

tosupplyadequatecombustionairforallappliancedemands,

mayleadtoback-draftingofthoseandotherappliances.

Whentheapplianceisside-wallvented:Theairintakeisbest

locatedonthesameexteriorwallastheexhaustventoutlet

andlocatedloweronthewallthantheexhaustventoutlet.

When the appliance is roof vented: The air intake is best

locatedontheexteriorwallorientedtowardstheprevailing

wind direction during the heating season.

The outside air connection will supply the demands of the

pellet appliance, but consideration must be given to the

totalhousedemand.Housedemandmayconsumesome

air needed for the stove, especially during a power failure. It

maybenecessarytoaddadditionalventilationtothespacein

which the pellet appliance is located. Consult with your local

HVACprofessionaltodeterminetheventilationdemandsfor

your house.

Toinstalloutsideairuse3"non-combustibleexpipe.There

isabreak-awayholeontherearpaneloftheXXV-TCstove

which must be removed before connecting the ex pipe,

Figure4.12.Thepipeshouldberunoutsideandterminate

tothesideorbelowtheventpipeoutletsotheueoutlet

is more than 12" from the inlet cover. The Termination Cap

shouldbeusedtokeepbirds,rodents,etc.outofthepipe,

Figure 4.13.

YoumaychoosetousetheoptionalDirectVentWallPass-

throughKitwhichincorporatestheventingpass-throughand

outside air inlet into one component, Figure 4.14.

D. Outside Air

Direct Vent Wall Pass-through Kit

Part #1-00-677177

Figure 4.14

Termination Cap

Part# 1-10-09542

Figure 4.13

Outside air ex pipe

goes here.

Figure 4.12

Remove knockout to

install outside air.

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2319 3-90-00680I

E. Locating Your Appliance & Chimney

Locationoftheapplianceandchimneywillaectperformance.

• Installthroughthewarmairspaceenclosedbythebuilding

envelope. This helps to produce more draft, especially

duringlightinganddie-downofthere.

• Penetrate the highest part of the roof. This minimizes the

eectsofwindloading.

• Locate termination cap away from trees, adjacent

structures,unevenrooflinesandotherobstructions.

• Minimizetheuseofchimneyosets.

• Considertheappliancelocationrelativetooorandceiling

and attic joists.

G. Negative Pressure

F. Draft

Draftisthepressuredierenceneededtoventappliances

successfully. When an appliance is drafting successfully, all

combustion byproducts are exiting the home through the

chimney.

Considerations for successful draft include:

• Negativepressureintherebox

• Location of appliance and chimney

To measure the draft or negative pressure in your appliance

use a magnahelic or a digital pressure gauge capable of

reading0-1inchesofwatercolumn(W.C.).

The appliance should be running on high for at least 15

minutes for the test.

With the stove running on high you should have a negative

pressureequaltoorgreaterthanthenumbergiveninthe

chartbelow.Ifyouhavealowerreadingthanyoundonthe

chart,yourappliancedoesnothaveadequatedrafttoburn

the fuel properly.

Minimum Vacuum Requirements: .20

Priortoinstallingtheuepipe,connectadraftmeter.(The

draftmetermusthaveaminimumrangeof0-.5”)Recordthe

rstreading.Connectuepipetostoveandbesurealldoors

and windows in the home are closed. Record the second draft

reading_______.If the secondreadingismorethan .05”

lowerthantherstreading,checkforpossiblerestrictions

or the need for outside air. For more information on the draft

test procedure, refer to “Appliance Set-Up” Section C.

• DONOTCONNECTTHISUNITTOACHIMNEYFLUE

SERVICINGANOTHERAPPLIANCE.

• DO NOT CONNECT TOANYAIR DISTRIBUTION

DUCTORSYSTEM.

Mayallowuegasestoenterthehouse.

CAUTION

Negativepressureresultsfromtheimbalanceofairavailable

fortheappliancetooperateproperly.Itcanbestrongestin

lower levels of the house.

Causes include:

• Exhaustfans(kitchen,bath,etc.).

• Range hoods.

• Combustionairrequirementsforfurnaces,waterheaters

andothercombustionappliances.

• Clothes dryers.

• Locationofreturn-airventstofurnaceorairconditioning.

• ImbalancesoftheHVACairhandlingsystem.

• Upper level air leaks such as:

 - Recessedlighting

 - Attichatch

 - Ductleaks

Tominimizetheeectsofnegativeairpressure:

• Install the outside air kit with the intake facing prevailing

winds during the heating season.

• Ensure adequate outdoor air for allcombustionappliances

andexhaustequipment.

• Ensure furnace and air conditioning return vents are not

located in the immediate vicinity of the appliance.

• Avoid installing the appliance near doors, walkways or

small isolated spaces.

• Recessedlightingshouldbea“sealedcan”design.

• Attic hatches weather stripped or sealed.

• Attic mounted duct work and air handler joints and seams

taped or sealed.

Risk of Asphyxiation! Negative pressure can cause

spillageofcombustionfumesandsoot.

WARNING

NOTICE

Hearth&HomeTechnologiesassumesnoresponsibility

for the improper performance of the chimney system

causedby:

• Inadequate draft due to environmental conditions

• Downdrafts

• Tight sealing construction of the structure

• Mechanicalexhaustingdevices

Harman® • XXV-TC Installation Manual_R20 • 2016 -___ • 08/2320 3-90-00680I

H. Avoiding Smoke and Odors

Negative Pressure, Shut-down, and Power Failure:

To reduce the probability of back-drafting or burn-back in

the pellet burning appliance during power failure or shut-

down conditions, the stove must be able to draft naturally

withoutexhaustbloweroperation.Negativepressureinthe

house will resist this natural draft if not accounted for in the

pellet appliance installation.

Heatrisesinthehouseandleaksoutatupperlevels.This

airmustbereplacedwithcoldairfromoutdoors,whichows

into lower levels of the house. Vents and chimneys into

basementsandlowerlevelsofthehousecanbecomethe

conduit for air supply, and reverse under these conditions.

Outside Air

An outside air kit is recommended in all installations. The

OutsideAirKitmustbeorderedseparately.

Pernationalbuildingcodes,considerationmustbegivento

combustionairsupplytoallcombustionappliances.Failure

tosupplyadequatecombustionairforallappliancedemands

mayleadtobackdraftingofthoseandotherappliances.

Whentheapplianceisroofvented(stronglyrecommended):

Theairintakeisbestlocatedontheexteriorwalloriented

towards the prevailing wind direction during the heating

season.

Whentheapplianceisside-wallvented:

Theairintakeisbestlocatedonthesameexteriorwall

astheexhaustventoutletandlocatedloweronthewall

thantheexhaustventoutlet.

The outside air supply kit can supply most of the demands

ofthepelletappliance,butconsiderationmustbegivento

the total house demand.

House demand may consume the air needed for the

appliance.Itmaybenecessarytoaddadditionalventilation

to the space in which the pellet appliance is located.

ConsultwithyourlocalHVACprofessionaltodeterminethe

ventilation demands for your house.

Vent Pipe

Be sure to use approved pellet vent pipe wall and ceiling

pass-throughttingstogothroughcombustiblewallsand

ceilings. Be sure to use a starting collar to attach the venting

systemtothestove.Thestartingcollarmustbesecuredto

theuestubwithatleastthreescrews,andsealedwithhigh

temp silicone caulking.

4” stainless steel ex vent piping is only allowed for use

inmasonryreplacesandchimneysorfactorybuiltwood-

burningreplaceswithclassAmetalchimneys.

Pellet vent pipe is constructed of two layers with air space

between the layers. This air space acts as an insulator

and reduces the outside surface temperature to allow a

clearanceto combustibles ofonly 1 inch. The sections of

pipe lock together to form an air tight seal. Follow venting

manufacturer’srecommendationsforsealingpipejoints.

Wherepassingthroughanexteriorwallorroof,usesilicone

tomaintainaneectivevaporbarrieratthelocationwhere

thechimneyorcomponentpenetratestotheexteriorofthe

structure.

Vent Congurations:

To reduce probability of reverse drafting during shut-

down conditions, Hearth & Home Technologies strongly

recommends:

• Installing the pellet vent with a minimum vertical run of

vefeet.

• Installing outside air.

Topreventsootdamagetoexteriorwallsofthehouseand

topreventre-entryofsootorashintothehouse:

• Maintainspeciedclearancestowindows,doors,andair

inlets, including air conditioners.

• Ventsshouldnotbeplacedbelowventilatedsots.Run

theventabovetheroof.

• Avoid venting into alcove locations.

• Vents should not terminate under overhangs, decks or

onto covered porches.

• Maintain minimum clearance of 12 inches from the

ventterminationtotheexteriorwall.Ifyouseedeposits

developing on the wall, you may need to extend this

distance to accommodate your installation conditions.

Hearth & Home Technologies assumes no responsibility

for, nor does the warranty extend to, smoke damage

caused by reverse drafting of pellet appliances under

shut-down or power failure conditions.

Harman XXV-TC Pellet Stove Installation guide

Related papers

Other documents