MHSC TPB24 Operating instructions

Brand: MHSC

Model: TPB24

Category: Fireplaces

Type: Operating instructions

This manual is also suitable for

This is an unvented gas-red heater.

It uses air (oxygen) from the room

in which it is installed. Provisions for

adequate combustion and ventilation

air must be provided. Refer to page

10.

READ AND SAVE THESE INSTRUCTIONS

VENT-FREE FIREPLACE

SYSTEMS

INSTALLATION AND OPERATING

INSTRUCTIONS

MODELS:

32VFHNVC, 32VFHPVC

36VFHNVC, 36VFHPVC

42VFHNVC, 42VFHPVC

WARNINGS

If the information in this manual is not followed

exactly, a fire or explosion may result causing

property damage, personal injury or loss of life.

– Donotstoreorusegasolineorotherammable

vapors and liquids in the vicinity of this or any

other appliance.

– 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

redepartment.

– Installation and service must be performed by

a qualied installer, service agency or the gas

supplier.

WARNINGS

2 71D0533

CONTENTS

Important Safety Information ................................ 3

Product Features .....................................................5

Operation ..............................................................5

Specications ..........................................................7

Ignition Controls ....................................................7

Pilot .......................................................................7

Thermal Generator ................................................7

Getting Started .........................................................8

General Installation Information ............................9

Firebox Dimensions .............................................. 9

Codes ..................................................................10

Adequate Combustion and Ventilation Air...........10

Removing Screen ...............................................12

Installing Canopy ................................................12

Location of Fireplace ............................................13

Clearances and Height Requirements .................14

Fireplace Framing..................................................15

Connecting the Gas ...............................................17

Checking Gas Pressure ........................................18

Milli-Volt Control ..................................................18

Electrical Wiring (Milli-Volt) .................................. 19

Connecting Optional Wall Switch ........................19

Connecting Remote Receiver .............................20

Checking System Operation ............................... 20

Log Placement .......................................................21

Flame Appearance .................................................25

Checking the Burner Flame .................................26

Operating Instructions ..........................................27

For Your Safety Read Before Lighting ................ 27

Milli-Volt Control Lighting Instructions .................28

Match Lighting Instructions ................................. 29

Cleaning and Servicing .........................................29

Blower and Other Optional Equipment ...............30

Illustrated Parts Breakdown .................................31

Logs ....................................................................31

Heater .................................................................32

Cabinet ................................................................34

Troubleshooting ....................................................36

Trim Installation .....................................................38

Using Optional Outside Air Kit .............................40

Warranty .................................................................43

71D0533 3

10. This unit complies with ANSI Z21.11.2 Unvented

Heaters.

11. Do not install the heaters in a bathroom or bedroom.

12. Correct installation of the ceramic ber logs, proper

locationoftheheater,andannualcleaningareneces-

sarytoavoidpotentialproblemswithsooting.Sooting,

resultingfrom improperinstallation oroperation, can

settleonsurfacesoutsidethereplace.Seelogplacement

instructions for proper installation.

13. Avoidanydraftsthatalterburneramepatterns.Donot

allowfanstoblowdirectlyintoreplace.Donotplace

ablowerinsideburnareaofrebox.Ceilingfansmay

createdraftsthatalterburneramepatterns.Sootingand

improperburningwilloccur.

14. Caution: Candles, incense, oil lamps, etc. produce

combustionbyproductsincludingsoot.Vent-freeappli-

anceswillnotlterorcleansootproducedbythesetypes

of products. In addition, the smoke and/or aromatics

(scents) may be reburnt in the vent-free appliance which

can produce odors. It is recommended to minimize the

useofcandles,incense,etc.whilethevent-freeappliance

is in operation.

15. Thisisanunventedgas-redheater.Itusesair(oxygen)

from the room in which it is installed. Provisions for

adequate combustion and ventilation air must be pro-

vided.Seepage10.

16. Keep room area clear and free from combustible materi-

als,gasolineandotherammablevaporsandliquids.

17. Unventedgasheatersareasupplementalzoneheater.

Theyarenotintendedtobetheprimaryheatingappli-

ance.

INSTALLER

Please leave these instructions with the appliance.

OWNER

Please retain these instructions for future reference

IMPORTANT

Readtheseinstructionscarefullybeforeinstallingortryingtooperatethisvent-freegasheater.

IMPORTANT SAFETY INFORMATION

 1. Duetohightemperatures,theapplianceshouldbe

locatedout of trafcand awayfrom furniture and

draperies.

2. Children and adults should be alerted to the hazard

ofhighsurfacetemperatureandshouldstayawayto

avoidburnsorclothingignition.

 3. Youngchildrenshouldbecarefullysupervisedwhen

they are in the same room with the appliance.

 4. Donotplaceclothingorotherammablematerialon

or near the appliance.

 5. Anysafetyscreenorguardremovedforservicingan

appliance, must be replaced prior to operating the

heater.

 6. Installationandrepairshouldbedonebyaqualied

service person.

 7.Topreventmalfunctionand/orsooting,anunvented

gasheatershouldbecleanedbeforeuseandatleast

annually by a professional service person. More

frequent cleaning may be required due to exces-

sivelintfromcarpeting,beddingmaterials,etc.Itis

imperativethatcontrolcompartments,burnersand

circulatingairpassagewaysbekeptclean.

8. CARBON MONOXIDE POISONING:Earlysignsof

carbonmonoxidepoisoningaresimilartotheuwith

headaches,dizzinessand/ornausea.Ifyouhavethese

signs, obtain fresh air immediately. Have the heater

servicedasitmaynotbeoperatingproperly.

9. Theinstallationmustconformwithlocalcodesor,in

theabsenceoflocalcodes,withtheNational Fuel Gas

Code, ANSI Z223.l/NFPA54. Continued on page 4

• Any changetothisheateroritscontrolscanbedangerous.

•Improperinstallationoruseoftheheatercancauseseriousinjuryordeathfromre,

burns,explosionorcarbonmonoxidepoisoning.

•Donotallowfanstoblowdirectlyintothereplace.Avoidanydraftsthatalterburner

amepatterns.

•Donotuseablowerinsert,heatexchangerinsertorotheraccessory,notapprovedfor

usewiththisheaterwhereapplicable.

WARNING

4 71D0533

IMPORTANT SAFETY INFORMATION

THIS APPLIANCE MAY BE

INSTALLED IN AN AFTERMAR-

KET, PERMANENTLY LOCATED,

MANUFACTURED (MOBILE)

HOME, WHERE NOT PROHIB-

ITED BY LOCAL CODES.

THIS APPLIANCE IS ONLY FOR

USE WITH THE TYPE OF GAS

INDICATED ON THE RATING

PLATE. THIS APPLIANCE IS

NOT CONVERTIBLE FOR USE

WITH OTHER GASES.

Continued from page 3

18. Unventedgasheatersemitmoistureintothelivingarea.

Inmosthomesofaverageconstruction,thisdoesnotpose

aproblem. Inhouses of extremely tight construction,

additional mechanical ventilation is recommended.

19. Duringmanufacturing,fabricatingandshipping,various

components of this appliance are treated with certain

oils,lmsorbondingagents.Thesechemicalsarenot

harmfulbutmayproduceannoyingsmokeandsmells

astheyareburnedoffduringtheinitialoperationofthe

appliance;possibly causingheadaches or eye or lung

irritation. This is a normal and temporary occurrence.

  Theinitialbreak-inoperationshouldlasttwotothree

hours with the burner at the highest setting. Provide

maximumventilationbyopeningwindowsordoorsto

allowodorstodissipate.Anyodorsremainingafterthis

initialbreak-inperiodwillbeslightandwilldisappear

with continued use.

20. Inputratings are shown in BTU per hour and arefor

elevationsupto2,000feet.Forelevationsabove2,000

feet,inputratingsshouldbereduced4percentforeach

1,000feetabovesealevel.RefertotheNationalFuel

Gas Code.

21. Theapplianceanditsappliancemaingasvalvemustbe

disconnectedfromthegassupplypipingsystemduring

anypressuretestingofthatsystemattestpressuresin

excessof1/2psig(3.5kPa).

22. Theappliancemustbeisolatedfromgassupplypiping

systemby closing its equipment shutoffvalve during

anypressuretestingofthegassupplypipingsystemat

testpressuresequaltoorlessthan1/2psig(3.5kPa).

23. Do not use this room heater if any part has been under

water.Immediately calla qualied service technician

to inspect the room heater and to replace any part of the

controlsystemandanygascontrolwhichhasbeenunder

water.

24. Neverburnsolidfuelsinareplacewhereaunvented

room heater is installed.

25. Alwayshaveareplacescreeninplacewhentheappli-

ance is in operation and, unless other provisions for

combustionairareprovided,thescreenmusthavean

opening(s)forinductionofcombustionair.

71D0533 5

PRODUCT FEATURES

Figure 1 - Access to Controls

Thisvent-freereplacemustbemountedontheoororontheoptionalreplacehearth.

OPERATION

Thisunventedgasheaterrequiresnooutsideventingandburnscleanlywithhighheatingefciency.

Thiszero-clearanceunventedgasheatercanbeinstalledagainst(orrecessedinto)anywallthatisaccessibletoagasline.

Screen

Control

Knobs

On/Off Switch

Piezo

6 71D0533

NATURAL GAS

Milli-Volt Pressure

RegulatorPressureSetting:3.5"w.c.

PilotRegulator:3.5"w.c.

GasInletPressure:Max.101/2"w.c.

 Min.5"w.c.

PRODUCT FEATURES

PROPANE/LPG

Note: An external regulator is required to reduce supply pressure to a maximum of 13" w.c.

Milli-Volt Pressure

RegulatorPressureSetting:10"w.c.

GasInletPressure:Max.13"w.c.

 Min.11"w.c.

Gas Rate

ModelNumber Control MaxBTU/Hr MinBTU/Hr

32VFHNVC MILLI-VOLT 38,000 26,000

36VFHNVC MILLI-VOLT 38,000 26,000

42VFHNVC MILLI-VOLT 38,000 26,000

Gas Rate

ModelNumber Control MaxBTU/Hr MinBTU/Hr

32VFHPVC MILLI-VOLT 34,000 26,000

36VFHPVC MILLI-VOLT 34,000 26,000

42VFHPVC MILLI-VOLT 34,000 26,000

71D0533 7

SPECIFICATIONS

IGNITION CONTROLS

Piezoignitorallowsignitionofthepilotwithouttheuseofmatchesorbatteries.

Milli-Volt control has four (4) positions:

OFF  - Allgastothegaslogsisshutoffatthevalve.

IGN  - Valvepositiontolight/maintainastandingpilot.

ON  - ValvepositiontoturnON/OFFlogsetwithremoteswitch/thermostat.

LOW/HI  - Variablepositiontocontrolameheight(heatoutput).Bothfrontandrearburnersareinoperationto

providerealisticglowandyellowame.

PILOT

Thegaslogheateristtedwithaspeciallydesignedsafetypilotlight(ODSassembly)whichsensestheamountofoxygen

availableintheroomandshutsthegaslogheateroffiftheoxygenlevelbeginstodropbelowasatisfactorylevel.Thepilot

can only be relit when adequate fresh air is available.

THERMAL GENERATOR

Themilli-voltgaslogpilotisttedwithamilli-voltgeneratortoprovidepowerforremoteactivation.

8 71D0533

MAKE SURE YOU HAVE RECEIVED ALL PARTS:

Checkyourpackinglisttoverifythatalllistedpartshavebeenreceived.Youshouldhavethefollowing:

 • Unventedgasloggrate/burnerassembly

 • Installation/operatinginstructions

 • Ceramicberlogs

 • Rockwool

 • Plasticbagcontainingcrushedvolcanicrock

 • Trimkit

 • Canopyandve(5)mountingscrews

Themilli-voltcontrolledversionofthisheateristheonlystyledesignedtobeoperatedwithoptionaldevicesforON/OFF

functions.Thefollowingoptionsmaybeusedwiththemilli-voltcontrolledheater.Theseoptionsarenotpackagedwiththe

logset.

• Hand held remote with receiver

• Wall switch with 15' wire

• Wall thermostat with 15' wire

• Hand held thermostat remote with receiver

•Glovesarerecommendedwhenhandlingceramicberlogstopreventskinirritation

fromloosebers.Logsarefragile—handlewithcare.

WARNING

Carefullyinspectthecontentsforshippingdamage.Ifanypartsaremissingordamaged,immediatelyinformthedealer

from whom you purchased the appliance. Do not attempt to install any part of the appliance unless you have all parts

in good condition.

WHAT YOU WILL NEED FOR INSTALLATION:

Youmusthavethefollowingitemsavailablebeforeproceedingwithinstallation:

 • Externalregulator(forpropane/LPGand1/2lb.naturalgassystemsonly)

 • Pipingwhichcomplieswithlocalcodes

• Pipe wrench or appropriate size crescent wrench set

 • Pipesealantapprovedforusewithpropane/LPG(Resistanttosulfurcompounds)

• Sediment trap

• Manual shutoff valve

• Tee joint.

• Phillips head screwdriver

GETTING STARTED

71D0533 9

GENERAL INSTALLATION INFORMATION

Inplanningtheinstallationforthereplaceitisnecessarytodeterminewheretheunitistobeinstalledandwhetheroptional

accessoriesaredesired.Gassupplypipingshouldalsobeplanned.Thefollowingstepsrepresentthenormalsequenceof

installation.Eachinstallationisunique,however,andmightrequireadifferentsequence.

 1. Positionreplaceindesiredlocation.Refertothe“Loca-

tionofFireplace”and“ClearancesandHeightRequire-

ments,”and“FireboxFraming”sectionsfoundinthis

manual. Note: Be sure all packing material has

been removed from underside of the unit.

 2. Install canopy and logs per instructions found in this

manual. The canopy MUST be installed for safe opera-

tion of the unit.

 3. Field wire main power supply to units with fan kit.

Refertothe“ElectricalSection”foundinthismanual.

(Electrical connections should only be performed by an

experienced,licensedcertiedtradesman).

 4. Install optional ON/OFF kit on units with milli-volt

control. Refer to installation instructions included with

thekitandalsorefertothe“ElectricalWiring”section

found in this manual.

 5. Plumbgasline.Refertothe“ConnectingtheGas”sec-

tion found in this manual. (Gas connections should only

be performed by an experienced, licensed / certied

tradesman).

 6. Completenishwallmaterialand/orsurround.

5 7/16"

34 1/2"

1 1/4"

21 3/4"

1 5/16"

2 1/2"

Figure 2 - Firebox Dimensions with Screen and Log Sets Removed

32VFHNVC 36VFHNVC 42VFHNVC

32VFHPVC 36VFHPVC 42VFHPVC

A 37" 41" 47"

B 32" 36" 42"

C 16" 18" 18"

D 29" 32" 38"

E 18⅝" 20⅝" 20⅝"

F 23⅜" 27⅜" 33⅜"

G 13¼" 15¾" 15¾"

H 18" 17⅝" 17⅝"

I 29⅞" 34" 40"

J 7⅛" 9¾" 9¾"

K 8" 8¼" 8¼"

L 2¾" 2¼" 2¼"

1 ¼"

5 7/16"

21 ¾"

2 ½"

1 5/16"

34 ½"

10 71D0533

GENERAL INSTALLATION INFORMATION

CODES

Adheretoalllocalcodesor,intheirabsence,thelatesteditionofTHENATIONALFUELGASCODEANSIZ223.1or

NFPA54whichcanbeobtainedfrom:

American National Standards Institute, Inc.

1430Broadway

NewYork,NY10018

National Fire Protection Association, Inc.

BatterymarchPark

Quincy,MA02269

ADEQUATE COMBUSTION AND VENTILATION AIR

Thisheatershallnotbeinstalledinaconnedspaceorunusuallytightconstruction unless provisions are providedfor

adequate combustion and ventilation air.

The National Fuel Gas Code, (ANSI Z223.1/NFPA54),denesaconnedspaceasaspacewhosevolumeislessthan50

cubicfeetper1,000BTUperhour(4.8m3perkw)oftheaggregateinputratingofallappliancesinstalledinthatspace,and

anunconnedspaceasaspacewhosevolumeisnotlessthan50cubicfeetper1,000BTUperhour(4.8m3perkw)ofthe

aggregateinputratingofallappliancesinstalledinthatspace.Roomscommunicatingdirectlywiththespaceinwhichthe

appliancesareinstalled,throughopeningsnotfurnishedwithdoors,areconsideredapartoftheunconnedspace.

UNUSUALLY TIGHT CONSTRUCTION IS DEFINED AS CONSTRUCTION WHERE:

a) wallsandceilingsexposedtotheoutsideatmospherehaveacontinuouswatervaporretarderwitharatingof1perm

(6x1011kgperpa/sec-m2)orlesswithopeningsgasketedorsealed;

b) weatherstripinghasbeenaddedonopenablewindowsanddoors,and

c) caulkingorsealantsareappliedtoareassuchasjointsaroundwindowanddoorframes,betweensoleplatesandoors,

betweenwall-ceilingjoints,betweenwallpanels,atpenetrationsforplumbing,electrical,andgaslines,andatother

openings.

Do not install the heater:

•Wherecurtains,furniture,clothing,orotherammableobjectsarelessthan42"from

the front of the heater.

•Inhightrafcareas.

• In windy or drafty areas.

WARNING

71D0533 11

WARNING

Thefollowingformulacanbeusedtodeterminethemaximumheaterratingperthedenitionofunconnedspace:

(L1 + L2) Ft x (W) Ft x (H) Ft

Considertwoconnectingroomswithanopenareabetween,withthefollowingdimensions:

L1 = 151/2 Ft., L2 = 12 Ft., W = 12 Ft., H = 8 Ft.

(151/2 + 12) x (12) x (8)

If there were a door between the two rooms the calculation would be based only on the room with the heater.

(151/2) x (12) x (8)

GENERAL INSTALLATION INFORMATION

Figure 3 - Example of a Large Room with 1/2 Wall Divider

Counter

Fireplace

x 1000

x 1000 = 52800 BTU/Hr

x 1000 = 29760 BTU/Hr

If the area in which the heater may be operated is smaller than that dened as an

unconnedspaceorifthebuildingisofunusuallytightconstruction,provideadequate

combustionandventilationairbyoneofthemethodsdescribedintheNationalFuel

GasCode,ANSIZ223.1/NFPA54,Section5.3orapplicablelocalcodes.

WARNING

BTU/Hr =

12 71D0533

GENERAL INSTALLATION INFORMATION

REMOVING SCREEN

Removereplacescreenframepanelbypushingscreenframepanelupandout.See Figure 4.

Figure 5 - Canopy Installation

INSTALLING CANOPY

 1. Removethereplacescreenasdescribedintheprevioussection.

 2. Alignthecanopywiththeholesinthetopframe.See Figure 5.

 3. Installandtightensidescrews.

 4. Makesurethecanopyislevelandsecure.Installthereplacescreen.

Figure 4 - Removing Fireplace Screen Frame Panel

NOTE: Fireplace screen must be removed to access log box and to install canopy.

Canopy

Fireplace

Screen

Do not operate the unit without the

screen frame panel and canopy

installed.

WARNING

71D0533 13

LOCATION OF FIREPLACE

Carefullyselectthebestlocationforinstallationofyourunventedreplace.Thefollowingfactorsshouldbetakeninto

consideration.

 • Clearancetosidewall,ceiling,woodworkandwindoworothercombustibles.Referto“ClearancesandHeightRequire-

ments”sectiononpage14.Minimumclearancestocombustiblesmust be maintained.

 • Locationmustnotbeaffectedbydraftscausedbykitchenexhaustfans,ceilingfans,returnairregistersforforcedair

furnaces/airconditioners,windowsordoors.

• Installation must provide adequate ventilation and combustion air.

• DO NOT INSTALL THIS MODEL IN A BEDROOM OR BATHROOM.

• Locationshouldbeoutofhightrafcareasandawayfromfurnitureanddraperiesduetoheatfromrebox.

 • Neverobstructthefrontopeningoftheunventedreplaceorrestricttheowofcombustionandventilationair.

 • Minimizemodicationstoexistingconstruction.See Figure 6 belowforlocationsuggestions.

 • Donotinstallinthevicinitywheregasolineorotherammableliquidsmaybestored.Theunventedreboxmustbe

keptclearandfreefromthecombustiblematerials.

Figure 6 - Suggested Locations

14 71D0533

CLEARANCES and HEIGHT REQUIREMENTS

12"

10"

21/2"

12"

16" 19"21"

23"

Combustible material

can contact top of

replace.

Non-combustible

material only if needed to

cover optional radiant top

panel above canopy.

Sidewall and ceiling clearances: The clear-

ance from the inside of the appliance to any com-

bustibleadjacentwall shouldnobe lessthan9".

See Figure 7.

Ceiling clearance: Theceilingmustbeatleast

42"fromthetopofthereboxopening.See Figure

Back wall clearance: The appliance may be

placedagainstacombustiblebackwall.

Floor clearance: The fireplace may not be

installed onto any combustible ooring material,

suchascarpeting,vinylortilewithoutthehearth

oraminimum22GA(0.030")metaloraminimum

1/2" wooden base covering the entire width and

depth of the base. Combustible material must be

installed at least one inch away from the front face

of the unit.

Mantel clearances: The canopy supplied with

the unit must be installed. If a combustible mantel

is installed. It must meet the clearance requirements

shown in Figure 8.

Figure 7 - Sidewall and Ceiling Clearances

WARNING

Figure 8A - Minimum Mantel Clearances

Figure 8B - Mantel Heights For Wide Brass

ThedimensionsshowninFigures7and8anddenedinthereplacemanufacturer's

instructions are minimum clearances to maintain when installing this heater. Left and

right clearances are determined when facing the front of the heater.

Follow these instructions carefully to ensure safe installation. Failure to follow



Canopy. See Pg. 35

71D0533 15

1/2" or 5/8"

FIREPLACE FRAMING

Ifunitistobe“builtin,”replaceframingcanbebuiltbeforeoraftertheapplianceissetinplace.BE SURE THAT ALL

PACKING MATERIAL HAS BEEN REMOVED FROM THE UNDERSIDE OF THE UNIT PRIOR TO SETTING

THE FIREBOX IN PLACE. ConstructreplaceframingfollowingFigures 9 through 12. Refer to Figure 2 on page 9 for

replacedimensions.Theframingheadersmayrestdirectlyontopoftherebox.

Thereplacemaybeinstalleddirectlyonacombustibleoororaraisedplatformofanappropriateheight.Donotplace

replaceoncarpeting,vinyl,tileorothersoftoorcoverings.Itmay,however,beplacedonatwood,plywood,particle

boardorotherhardsurfaces.Besurereplacerestsonasolidcontinuousoororplatformwithappropriateframingfor

supportandsothatnocoldaircanenterfromundertherebox.

Anchorreplacetothesideframingmembersusingoptionalnailingangekit.Seeinstallationinstructionsincludedwith

thekit.

Figure 9 - Corner Installation

Figure 10- Inside Chase Installation

Figure 12- Recessed Installation

Figure 11 - Stud Location

Unnished/rough

framing surface

Unnished/rough

framing surface

Unnished/rough

framing surface

equivalent

clearance

for drywall/

nishing

5/8" or equivalent

clearance for

drywall/nishing

materials

32VFHNVC 36VFHNVC 42VFHNVC

32VFHPVC 36VFHPVC 42VFHPVC

A 37¼" 41¼" 47¼"

B 35" 35" 35"

C 29" 32" 38"

D 14⅞" 16⅜" 19⅜"

E 61¾" 68⅞" 74⅞"

F 30⅞" 34½" 37½"

G 15½" 17½" 17½"

H 43¾" 48¾" 53"

Optionalbottomradiantpanelkits

cannot be covered. Optional top

radiantpanelscanbecoveredas

shown in Figure 8.

WARNING

16 71D0533

32VFHNVC 36VFHNVC 42VFHNVC

32VFHPVC 36VFHPVC 42VFHPVC

K 37⅞" 41⅞" 47⅞"

J 35⅞" 35⅞" 35⅞"

FIREPLACE FRAMING

1. Bendoutthenailingangeslocatedoneachsideoftherebox.

 2. Slidethereboxintopreparedframingorpositionreboxinitsnalpositionandframelater.

 3. Levelthereboxbycheckingthetopedgeoftherebox.Shimifnecessary.

 4. Anchorreboxtothesideframingmembersusing8dnailsorothersuitablefasteners.Refer to Figure 14.

 5. Thecanopymustbeinstalledforsafeoperationoftheheater.Refertopage12forcanopyinstallationdetails.

Whennishingacustomcabinet,mantel,orotherbuilt-inenclosure,

theopeningsizetoaccommodatethereplacewithtriminstalledis

asfollows:

WARNING

Figure 13 - Custom Cabinet

Figure 14 - Location of Nailing Flanges

Nail Sides

Through Nailing

Flanges

Thereplacemustbeinstalledgiving

full consideration to the clearance and

heightrequirementsidentiedinthis

manual.

WARNING

71D0533 17

Pipe Coupling

To Heater

Valve

Gas Supply

Inlet

CONNECTING THE GAS

NOTICE: A qualied gas appliance installer must connect the heater to the gas supply. Consult all local codes.

IMPORTANT: Holdheatervalvermlywithawrenchtopreventmovementwhenconnectingtoinletpipe.

Manual Shutoff

Valve

Pipe

Stainless

Flexible Tube

Figure 15 - Gas Connection

Always use an external regulator for all propane/LPG heaters and high pressure one to two-pound systems only,to

reducethesupplytankpressuretoamaximumof13"w.c.Thisisinadditiontotheinternalregulatorintheheatervalve.

Locations that the Pressure

Tapping Point May Be Installed

CHECK GAS TYPE: Thegassupplymustbethesameasstatedontheheater’srating

plate. If the gas supply is different, DO NOT INSTALL THE HEATER. Contact your dealer

for the correct model.

WARNING

Usenewblackironorsteelpipe.Internallytinnedcopperorcoppertubingcanbeused

perNationalFuelCode,section2.6.3,providinggasmeetshydrogensuldelimits,and

wherepermittedbylocalcodes.Gaspipingsystemmustbesizedtoprovideminimum

inletpressure(ListedonDataPlate)atthemaximumowrate(BTU/Hr).Unduepressure

loss will occur if the pipe is too small.

A manual shutoff valve must be installed upstream of the appliance. Union tee and

plugged 1/8"NPTpressuretappingpointshouldbeinstalledupstreamoftheappliance.

See Figure 15.

CAUTION

18 71D0533

WARNING

CHECKING GAS PRESSURE

MILLI-VOLT CONTROL (Figure 16)

Thevalveregulatorcontrolstheburnerpressurewhich

shouldbecheckedatthepressuretestpoint.

Turncapturedscrewcounterclockwisetwoorthree

turnsandthenplacetubingtopressuregaugeovertest

point(Usetestpoint“OUT”closesttocontrolknob).

Aftertakingpressurereading,besureandturncaptured

screwclockwisermlytore-seal.Donotovertorque.

Checkforgasleaks.

Figure 16 - Pressure Test Point Location

Milli-Volt Control

Whentighteningupthejointtothevalve,holdthevalvesecurelytopreventmovement.

Testallgasjointsfromthegasmetertotheheatervalveforleaksusingagasanalyzerorsoapandwatersolutionaftercom-

pletingconnection.DO NOT USE AN OPEN FLAME.

CheckthegaspressurewiththeapplianceburningandthecontrolsettoHIGH.

Connecting directly to an

unregulated propane/LPG tank

can cause an explosion.

WARNING

Test Port “OUT”

71D0533 19

ELECTRICAL WIRING

Themilli-voltvalveisaself-poweredcombinationgascontrolTHAT DOES NOT REQUIRE 110 VAC TO OPER-

ATE.

CONNECTING OPTIONAL WALL SWITCH

 1. Use18awg,two-wirecable,15feetmaximumlength.

 2. Atoneendofthecable,connectbothwirestothewallswitchorthermostat.Attheotherend,connectonewireto

TP/THandonewiretoTH,orconnectthewallswitch/thermostattothetwomale(0.25")terminalsontheleftsideof

the unit. The color of the wires does not matter.

Figure 17 - Wiring Diagram

Optional Wall

Switch or Remote

Receiver

Switch

On/Off

Switch

On/Off

Switch

Wall

Switch

ODS

Pilot

Valve

TH = 3

TP = 1

TP/TH = 2

ODS

Pilot

Spade

Terminal

Labelallwirespriortodisconnection

when servicing controls. Wiring

errors can cause improper and

dangerous operation. Verify proper

operation after servicing.

WARNING

20 71D0533

ELECTRICAL WIRING

A. COMPLETE MILLI-VOLT SYSTEM CHECK

  (“A”Reading-ThermostatcontactsCLOSED-ControlKnob“ON”-MainburnershouldturnON)

 a. Ifthereadingismorethan100milli-voltsandtheautomaticvalvestilldoesnotcomeon,replacethecontrol.

 b. Iftheclosedcircuitreading(“A”reading)islessthan100millivolts,determinecauseforlowreading,proceedto

SectionBbelow.

B. Thermopile Output Reading Check

(“B”Reading-ThermostatcontactsOPEN-MainburnerOFF)

 1. Checkgaspressuretotheunit.Ifgaspressureiswithinminimumandmaximumondataplate,thencheckpilot

voltage,325millivoltsminimum.Iftheminimummilli-voltreadingisnotobtainable,replacepilot.

CONNECT

METER SWITCH OR METER

CHECK TO LEADS TO THERMOSTAT READING

TEST TEST TERMINALS CONTACTS SHOULD BE

A COMPLETE 2 & 3 CLOSED CLOSED

SYSTEM

B THERMOPILE 1 & 2 OPEN OPEN

OUTPUT

CHECKING SYSTEM OPERATION

The milli-volt system and individual com-

ponentsmaybecheckedwithamilli-volt

meterhavinga0-1000mVrange.Conduct

eachcheckshowninchartbelowbycon-

nection meter test leads to terminals as

indicated.

CONNECTING REMOTE RECEIVER

THESE InSTRUCTIOnS SUPERCEdE THE SEC-

TIOn EnTITLEd “HEaRTH MOUnT” In THE MILLI-

VOLT Hand-HELd REMOTE InSTRUCTIOnS SUP-

PLIEd WITH THE REMOTE.

 1. Remove cover on control panel to show opening for

remote receiver. See Figure 18.

2. Connect the remote connectors located in the unit (Figure

18).

 3. Slide remote receiver in the opening of control panel.

Use two screws provided to attach remote receiver to the

control panel. See Figure 18.

4. Replace cover.

NOTE: Do not place remote in combustion

chamber. Figure 18 - Installing Remote Receiver

Remote

Receiver

Cover

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MHSC TPB24 Operating instructions

Brand: MHSC

Model: TPB24

Category: Fireplaces

Type: Operating instructions

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MHSC TPB24 Operating instructions

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MHSC TPB24 Operating instructions

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