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L&L J SERIES JUPITER MANUAL KILN INSTRUCTIONS
TABLE OF CONTENTS
CAUTIONS ............................1
INSTALLATION .......................1
TEMPERATURE RATINGS .............2
PREPARATION &ASSEMBLY ..........2
UNDERSTANDINGTHE DESIGN ........2
BASIC CONCEPTOFTHE KILN ............................2
SECTIONALCONSTRUCTION ..............................2
SEPARATE CONTROLBOX ................................2
STURDYALUMINIZED STEELSTAND ......................2
SOLID STAINLESS STEELCASE ............................2
"EASY-OPEN, EASY-LOAD" LID ............................2
STANDARD HINGE FOR SMALLER MODELS ................2
THREE CASE CLAMPS PER SECTION .......................2
STAINLESS CLIPS HOLD BRICK LID IN PLACE ..............2
HEATING ELEMENTS IN CERAMIC HOLDERS ...............3
CHOICE OF 2-1/2 OR 3 OF INSULATION ...................3
LARGE DIAMETER PEEPHOLES ...........................3
MANUALCONTROLSYSTEM .............................3
DAWSON KILN SITTER/TIMER .............................3
OPTIONALTRU-VIEWPYROMETER SYSTEM ...............3
BOTTOM ELEMENTOPTION ..............................3
REVERSIBLE BOTTOM ...................................3
KILN FURNITURE ........................................3
VENT-SUREVENTOPTION ................................3
c-UL-US LISTED ..........................................3
POWER SUPPLY .......................4
VOLTAGE ...............................................4
WIRING DIAGRAM .......................................4
480VOLTS OPTION .......................................4
WHYPROPER GROUNDING IS IMPORTANT .................4
ELEMENTVOLTAGE ......................................4
POWER HOOK UP ........................................4
FUSINGYOUR CIRCUIT ...................................4
KILN SECTIONSAND PANEL ...........5
MODELSWITHAPOWER CORD ...........................5
DIRECTHOOK UPMODELS ...............................5
REPAIRING OR REPLACINGTHE
INSTRUMENTPANEL .....................................5
FUSES ................................6
MODELSWITH NO FUSES .................................6
OLD STYLE 3 PHASE (BEFORE 1997) .......................6
OLDER LARGE SINGLE PHASEAND 3 PHASE ...............6
NEWSTYLE (AFTER 1997) ................................6
CONTROLSYSTEM ...................6
INFINITE ZONE SWITCHES ................................6
REPLACING INFINITE ZONE SWITCHES ....................6
POTENTIALCHATTERING OF INFINITE ZONE SWITCHES ....6
TURN OFF KILN POWERAFTER EACH FIRING ..............7
PILOTLIGHTS ...........................................7
KILN SITTER/TIMER ......................................7
TESTINGTHE DAWSON FOR MANUALKILNS ...............7
OPTIONALPOWERED BOTTOM .......8
FIRSTFIRING OFTHE KILN ...........8
SERVICEAND MAINTENANCE .........8
REGULAR KILN MAINTENANCE ...........................8
WARRANTY .............................................8
SERVICE FORYOUR KILN ................................8
TROUBLESHOOTING .....................................8
ELECTRICALSPECIFICATIONS ............................8
WHERETO BUYPARTS ...................................8
REPLACEMENTELEMENTS ..............................8
CRACKS INTHETOP& BOTTOM ..........................8
SPARE PARTS .........................8
WHERETO BUYPARTS ...................................8
PARTSTO KEEPON HAND ................................8
PYROMETRIC CONES .................8
WHERETO LEARN MOREABOUTCONES ..................9
FIRING LOG ..........................9
MOREABOUTFIRING CERAMICS .....9
CONFIGURATIONS ....................9
CAUTIONS
Seethecautions.pdfintheCAUTIONSsection.READ
THESECAUTIONS.Theywillhelpprotectyouand
your property. Not all of the cautions are obvious -
evenexperiencedoperatorswillneedtopayattention.
INSTALLATION
See the INSTALLATIONsection (install.pdf) in this
InstructionManual.Thereisimportantinformationon
electrical hookup, ventilation requirements,
clearances,codes,etc.Youmustpayattentiontothese
issues or you could create a dangerous situation.
L&L J SERIES JUPITER MANUAL KILN INSTRUCTIONS
jupiter-manual-instruct.pdf
3/1/2007 Rev 4.1
Page 1 2007 L&LKilnMfg,Inc. 505SharptownRoad,SwedesboroNJ08085 P:856.294.0077 F:856.294.0070 E:sales@hotkilns.com W:hotkilns.com L&L J SERIES JUPITER MANUAL KILN INSTRUCTIONS
TEMPERATURE RATINGS
The J Series kilns are rated for use to 2350°F
(1287°C) (Cone 10). DO NOT FIREANY HIGHER
THAN THIS. The elements, element holders and
firebrick will melt. (Although the JD23 is only rated
to go to Cone 5 this is simply because of the lower
power per square inch in that kiln; if you can getit to
go above Cone 5 it won't hurt the kiln as long as you
don't go above Cone 10).
PREPARATION & ASSEMBLY
See the ASSEMBLY section in this Instruction
Manual for instructions on how to assemble your
kiln.
UNDERSTANDING THE DESIGN
BASIC CONCEPT OF THE KILN
A J Series electric kiln is an insulated polygonal
heating device designed specifically for firing of
ceramics. Coiled elements made of a special high
temperature alloy (iron-aluminum-chrome) are
mounted around the perimeter of the kiln.
SECTIONAL CONSTRUCTION
In the Jupiter Series the kiln is made up of one to five
separate sections that sit on top of a separate kiln floor.
Each section has a plug that plugs into a separate
instrument/control panel. You can increase or decrease
the size by adding or removing a section without
removingthehingeortop.Seehotkilns.com/section.pdf.
SEPARATE CONTROL BOX
The control panel is mounted on the floor away from
kiln heat for more reliable operation. The switches
andothersensitivecomponentslastlonger.Thepanel
weight will not affect the kiln. The panel can be sent
to factory for repairs if ever necessary.
STURDY ALUMINIZED STEEL STAND
Aluminized steel resists corrosion at the high
temperatures experienced in the important stand. The
stand has a full plate of aluminized steel under the
bottom brick. This allows the bottom brick to move
freely while expanding and contracting - which helps
prevent broken bottoms! The legs, which have two
bends for stiffness, are bolted onto the stand plates.
There are plastic feet that slip over the metal legs.
SOLID STAINLESS STEEL CASE
Resists corrosion and strengthens construction.
Stainless steel screws are used throughout for long-
term corrosion resistance.
"EASY-OPEN, EASY-LOAD" LID
This is standard on the J2900 series and optional on
J2300 Series. The Easy-Open, Easy-Load spring-
assisted hinge is counterbalanced with a torsion
spring which dramatically lightens the weight of the
lid and makes it easy to open and close.Alighter lid
also reduces lid and lip damage. A spring loaded
safety latch holds the lid in place while loading. The
lid, when open, is tilted away from the kiln opening
allowing greater access to the interior. There are no
lid supports in the way when loading your kiln. You
can safely and easily load from both sides. Anyone
who has tried to load a large kiln with a lot of work
can fully appreciate this great feature. The hinge
extends over three kiln sections and ties the kiln
togetherforstability.Allhingepartsarealuminizedor
galvannealed steel for corrosion resistance.
STANDARD HINGE FOR SMALLER MODELS
Thestandardhingeforthesmallermodels(J1800and
J2300 series) is made of stainless steel.You must use
theprovidedsafetychainsystemwiththeselids.(See
cautions.pdf in the CAUTIONS section of your
manual).
THREE CASE CLAMPS PER SECTION
The stainless steel case of each kiln section is held
together by three adjustable stainless steel hose
clamps. Behind the hose clamps the stainless steel
case is reinforced with a piece of aluminized steel to
prevent distortion. The clamps are easily accessible
for adjustment. Two clamps are used on lids and
bottoms.
STAINLESS CLIPS HOLD BRICK LID IN PLACE
Some manufacturers rely on the metal band around
thekilntoholdtheentireweightofthefirebrick.L&L
screws on several stainless steel clips that hold the
jupiter-manual-instruct.pdf
3/1/2007 Rev 4.1
Page 2 2007 L&LKilnMfg,Inc. 505SharptownRoad,SwedesboroNJ08085 P:856.294.0077 F:856.294.0070 E:sales@hotkilns.com W:hotkilns.com firebrick in the band.
HEATING ELEMENTS IN CERAMIC HOLDERS
Theheatingelementsaredesignedtohavealowwatt
density (radiating watts per square inch of element
surfacearea)andgoodstretchratio(ratioofstretched
length to original coiled length). These are supported
in hard ceramic element holders (a unique L&L
feature).
CHOICE OF 2-1/2 OR 3 OF INSULATION
The insulation is a special hand picked lightweight
firebrick , which is 2-1/2" or 3" thick (depending on
the model). This firebrick resists temperatures up to
about 2450°F. It is highly insulating. See btu.pdf in
theINS