MHSC TPB24 Operating instructions

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outsidethereplace.Seelog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
useofcandles,incense,etc.whilethevent-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.
Inmosthomesofaverageconstruction,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systemandanygascontrolwhich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notpackaged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.Refertothe“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.
L
J
K
5 7/16"
G
F
D
E
C
34 1/2"
H
A
B
I
1 1/4"
21 3/4"
6"
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"
6"
34 ½"
10 71D0533
GENERAL INSTALLATION INFORMATION
CODES
Adheretoalllocalcodesor,intheirabsence,thelatesteditionofTHENATIONALFUELGASCODEANSIZ223.1or
NFPA54whichcanbeobtainedfrom:
American National Standards Institute, Inc.
1430Broadway
NewYork,NY10018
or
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
W
H
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
50
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)
50
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)
50
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 =
BTU/Hr =
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"
8"
6"
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
7.
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
H
D
G
F
A
C
E
1/2" or 5/8"
C
A
G
C
G
A
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.
B
A
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
or
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heaters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
inletpressure(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,besure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

Category
Fireplaces
Type
Operating instructions
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