Montigo H38-DF Owner's manual

■Check local codes
and read all
instructions prior to
installation.
■Leave this manual
with the owner.
Gas Fireplace
H38DF
Installation
Operation &
Maintenance
What To Do If You Smell Gas:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor's phone. Follow the gas
supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
Warning:
Improper installation, adjustment,
alteration, service or maintenance can
cause injury or property damage. Refer to
this manual. For assistance or additional
information consult a qualified installer,
service agency or the gas supplier.
For Your Safety:
Do not store or use gasoline
or other flammable vapors
and liquids in the vicinity of
this or any other appliance.
Questions? Email us at [email protected] or visit our website at www.montigo.com.

Page 2
H38DF Gas Fireplace
Part No. XG0131
Introduction
ThankYouforchoosingaMontigoGasFireplace.
About this Fireplace:
TheH38DFisa26,000BTUfireplacewithapan-styleburnerand
glowingembers.TheNaturalGasversioncanbeconvertedtobotha
TopVentorRearVentapplication,anditisavailableintwomodels.
H38DF;MillivoltPilot,LPModels TopVentOnly,
NGModelsToporRearVentConvertable
H38DF-I;IntermittentPilot(HSI),LPModelsTopVentOnly,
NGModelsToporRearVentConvertible
TheH38DFisratedforNaturalGasat26,000BTU/H(7.62Kilowatts)
InputorPropaneat21,000BTU/H(6.16 Kilowatts)Input.
How to use this manual:
Thismanualcoversinstallation,operationandmaintenance.Lighting,
operationandcareofthisfireplacecanbeeasilyperformedbythe
homeowner.However,allinstallationandserviceworkshouldbe
performedbyaqualifiedorlicensedinstaller,plumber,orgasfitterwho
isqualifiedorlicensedbythestate,province,region,orgoverning
bodyinwhichtheapplianceisbeinginstalled.
Thismanualcoversallmodelsandunlessotherwisespecified,the
designationH38DFreferstoallmodels.Sectionswhicharespecifictoa
particularmodelaremarkedwitha symbol,plustheappropriate
modelnumber.
Warranty and Installation Information:
TheMontigowarrantywillbevoidedby,andMontigodisclaimsany
responsibilityfor,thefollowingactions:
Modificationofthefireplaceand/orcomponentsincludingDirect-Vent
assemblyorglassdoors.
Useofanycomponentpartnotmanufacturedorapprovedby
MontigoincombinationwiththisMontigofireplacesystem.
Installationotherthanasinstructedinthismanual.
ConsultyourlocalGasInspectionBranchoninstallationrequirementsfor
factory-builtgasfireplaces.Installation&repairsshouldbedonebya
qualifiedcontractor.
InstallationsinCanadamustconformtothecurrentCAN/CGAB-
149.1and.2GasInstallationCodeandlocalregulations.Iftheoptional
air-circulatingfankitisinstalled,itmustbeelectricallygroundedin
accordancewithCSAC22.1CanadianElectricalCodePart1and/or
LocalCodes.
InstallationsintheUSAmustconformtolocalcodes,orinthe
absenceoflocalcodestotheNationalFuelGasCode,ANSIZ223.1-
1988.Iftheoptionalair-circulatingfanisinstalled,itmustbegroundedin
accordancewithlocalcodesor,intheabsenceoflocalcodes,withthe
NationalElectricalCode,ANSI/NFPA70-1987.
Table Of Contents
Introduction ............................................................................2
Installation
InstallingandFramingtheFireplace ...............................3
InstallingtheGasline.......................................................4
DirectVentInstallation ....................................................4
GeneralVentingRequirements ..........................4
Terminations......................................................5
ConvertingtoToporRearVentmodel...............6
VentingforTopVentmodels ..............................7
VentingforRearVentmodels...........................10
Constructionaroundthefireplace
Facing .............................................................12
MantelsandSurrounds....................................12
Wiring .......................................................................12
InstallingOptionalFans.................................................13
RemovingandInstallingtheDoor.................................13
InstallingtheLogset ......................................................14
InstallingtheHorizontalTrim .........................................15
Operation ........................................................................16 - 18
Maintenance ...................................................................18 - 19
Warranty ................................................................................20
Appendix
A.TerminationLocations ..............................................21
CAUTIONS
Duetoitshighoperatingtemperatures,theapplianceshould
belocatedoutoftraffic&awayfromfurnitureanddraperies.
Children and adults should be alerted to the hazards of
the high surface temperature, which could cause burns
or clothing ignition.
Young children should be carefully supervised when
they are in the same room as the appliance.
Clothing or other flammable materials should not be
placed on or near the appliance.
Important: Natural Gas equipped models may be
installed using Top or Rear Vent applications.
However, all Propane equipped models must be
installed in a top vent application only.

Page 3
H38DF Gas Fireplace
Part No. XG0131
Installing The Fireplace Shell
Thefireplacemaybeinstalledinanylocationthatmaintainsproper
clearancestoairconditioningducts,electricalwiringandplumbing.
Safety,aswellasefficiencyofoperation,mustbeconsideredwhen
selectingthefireplacelocation.Trytoselectalocationthatdoesnot
interferewithroomtraffic,hasadequateventilation,andoffersan
accessiblepathwayforDirectVentinstallation.Refertopage4-Vent
Installationformoreinformation.
Thefireplacedimensionsareshownbelow:
Installation
Wheninstallingashelfoverthetopof thefireplace,thefollowing
guidelinesmustbeadheredto: ForRearVentapplicationstheminimum
clearancefromthetopofthefireplacetoashelfis9".ForTopVent
applications,theminimumclearanceis171/2".(Minimum
2"clearancemuststillbemaintainedaroundtheventpipes.)
Figure 4. Framing for shelves over the fireplace.
TopVent
RearVent (NG Models Only)
Figure 3. Minimum Corner framing dimensions, using a 45° elbow.
Figure 2. Framing dimensions.
* When sheetrock is
not used behind the
fireplace, framing
depth may be
reduced to 19 3/4"
Framing
WARNING:
When this appliance is installed directly on carpeting, tile
or any combustible material other than wood flooring, it
must be installed on a metal or wood panel extending the
full width and depth of the appliance.
Top View
Front View SideView
Clearances
Theseclearancesapplytoalldimensionsexcepttheframedopening,
wheretheclearancetocombustiblesis0".TheH38DFclearancesto
combustiblematerialsare:
Top-RearVent* 9"
Top-Top Vent 17 1/2"
Back 1"
Sides 1"
Floor 0"
Mantle** 4"
* Clearancefromthetopofthefireplacetoacombustible
ceilingwithinthefireplaceenclosure.
** Refertopage11.
Unprotectedcombustiblewallswhichareperpendiculartothefireplace
opening,mustnotprojectbeyondtheshadedareashowninFigure23.
Forprotectionagainstfreezingtemperatures,itisrecommendedthat
outerwallsofthechasebeinsulatedwithavapourbarrier.Thiswill
reducethepossibilityofacold-airconvectioncurrentonthefireplace.
Figure 1. Fireplace dimensions. All LP Models are Top Vent Only.
IMPORTANT: See page 5
forinstallationinstructionsabout
theNailingFlangeExtension
NailingFlangeExtention

Page 4
H38DF Gas Fireplace
Part No. XG0131
Vent Installation
Thissectioncoverstheinstallationofdirectventingandterminations.
Installation Requirements
H38DF fireplaces are certified for use with Montigo Standard
Series (5" / 8") venting components.
Minimum 2" clearance to combustibles required for vent pipes
Use only certified Montigo vent components. (Use of other parts will
void the Montigo warranty, and may impede the operation of the
fireplace.)
All joints must be secured with a minimum of two screws per joint
Vent terminations must not be recessed in walls or siding
Horizontal runs must be supported by a minimum of two supports
per horizontal run. A minimum of one screw on each side of
support is also required
Flex vent sections may be stretched up to 50% of their total length
(eg. a 24" section may be stretched to 36")
Maximum horizontal run for a flex section with no vertical rise is 3 feet.
Flex vent sections over 3 feet must fall within the limits set by the
venting graph and must have a minimum vertical rise of 3 inches
per foot of flex.
Solid vent sections may be cut less than half way from the female end
Venting components can be used in any combination of solid/rigid
pipe or flex pipe and in any orientation (Male connectors can face
in any direction)
Vent Terminations
Selecting A Termination Location
Choosingyourventterminationlocationwillhelptodeterminewhether
youneedtouseatopventorrearventfireplace.Figure6a,below,
showstypicalfireplacelocationsandtheventingoptionstheyprovide.
Foramoredetaileddiagramofallowedterminationlocations,see
AppendixA.
Cautions:Cautions:
Cautions:Cautions:
Cautions:
Installing The Gas Line
ThegaslinemustbeinstalledbeforefinishingtheH38DFFireplace.
NaturalGasrequiresaminimum inletgassupply pressureof5.5"
W.C.&amanifoldpressureof3.5"W.C.PropaneGasrequiresa
minimuminletgassupplypressureof11"W.C.&amanifoldpressureof
10"W.C.Provisionmustalsobemadefora1/8"N.P.T.pluggedtapping
andbeaccessiblefortestgaugeconnectionimmediatelyupstreamofthe
gassupplycontrolstotheappliance.Thefireplacegasconnectionand
themainoperatinggasvalveislocatedunderneaththepanbaseatthe
bottomoftheunit,andneedonlybeattachedtothegasline withan
approvedfitting,asrequired bythe applicableinstallation codes.
To access the fireplace gas connection the main burner must be
removed as shown below in figure 5b.
•Onlyusegasshut-offvalvesapprovedforusebythestate,province,
region,orgoverningbody,inwhichtheapplianceisbeinginstalled,or
asrequiredbytheapplicableinstallationcodes.
•Flexiblegasconnectorsmustnotexceed3feetinlength,unlessitis
allowable withinapplicableinstallationcodes.
Installation
Figure 6a. Fireplace locations and vent terminations.
Note: After gas line is connected, each appliance connection,
valve and valve train must be checked while under
normal operating pressure with either a liquid solution, or
leakdetection device,to locate anysource of leak.Tighten
any areas where bubbling appears or leak is detected until
bubbling stops completely or leak is no longer detected.
DO NOT use a flame of any kind to test for leaks.
Figure 5a. Gas line access.
Theapplianceanditsindividualshutoffvalvemustbedisconnectedfrom
thegassupplypipingsystemduringanypressuretestingofthatsystem
attestpressuresinexcessof1/2psig(3.5kPa).
Theappliancemustbeisolatedfromthegassupplypipingsystemby
closingitsindividualmanualshutoffvalveduringanypressuretestingof
thegassupplypipingsystemattestpressuresequaltoorlessthan1/2
psig(3.5kPa). Vent terminations can be very hot. If the termination
is less than 7 feet above a public walkway, it should
befittedwithacertifiedMontigoHeatGuard.(Partno.
PTKOG)
Do not obstruct, or attempt to conceal, the vent
termination. These actions will affect the operation
of the fireplace, and may be hazardous.
Inheavysnowareas,takeextracaretopreventsnow
buildup from obstructing the vent termination.
Figure 5b. Removing the burner tray.

Page 5
H38DF Gas Fireplace
Part No. XG0131
Installing Terminations with Built-In Frames
Installing Terminations with MSR Frames
12
12
1. Frametheterminationopeningto12"x12".
2. Fastentheterminationtothestudsusingaminimumof4screws.
11
11
1. Frametheterminationopeningto11"x11".
2. Fastentheterminationtothestudsusingaminimumof4screws.
Installing Terminations with MOSR Frames
1212
12
MOSR
1. Frametheterminationopeningto12"x12".
2. FastentheMOSRframetotheinteriorsideofthestudsusinga
minimumof4screws.
3. InserttheterminationintotheMOSRframeasshownhere,and
attachbyscrewingthroughthefourpilotholesinthetermination.
MSR
PTO-3
PTO-3F
PTO-3
PTKOG
1. Ensurethatthetwolongmountingbracketsarefacingthebottomof
thetermination.(Seeinset).Thiswillprovidemoreheatprotectionat
thetopofthetermination,wheretemperaturesarehighest.
2. Attachtothefaceplateoftheterminationusingfoursheetmetalscrews.
Installing Heat Guards over Terminations
Installation
Installing The Standoffs And
Nailing Flange Extention
To avoid elevated mantel temperatures, all H38DF gas fireplaces
are required to have the supplied standoffs and nailing flange
extention installed.
Thefireplaceissuppliedwithtwostandoffs.Bendandinstallthese
standoffsontopofthefireplaceensuringthattheheightofthestandoff
maintainsa6"clearance.
Figure 6c. Installing the Nailing Flange Extension.
Installing The Remote Switch
TheH38DF'sgasvalve,locatedbehindthelowertrim,maybecon-
nectedtoawallswitch.Thevalvegeneratesitsownpowerona
millivoltcircuit. Use onlylow voltage wire,and DO NOTconnect
anyexternalpowertoit.
RefertoFigure30forwiringrequirements.
Note: Theswitchlocationmustnotexceed30'fromthefireplace.
Figure 6b. Installing the standoff's.
Oncethefireplaceisplacedintotheframedopening,thesuppliednailing
extentionmustplacedalongthetopedgeofthefireplace,andnailedin
placetotheframing,asillustratedbelow.