Vulcan-Hart K12ETT ML-136068 User manual

This Manual is prepared for the use of trained Vulcan Service
Techniciansandshouldnotbeusedbythosenotproperlyqualified.
This manual is not intended to be all encompassing. If you have not
attendedaVulcan ServiceSchoolforthisproduct,youshouldread,
in its entirety, the repair procedure you wish to perform to
determine if you have the necessary tools, instruments and skills
requiredtoperformtheprocedure.Proceduresforwhichyoudonot
have the necessary tools, instruments and skills should be
performed by a trained Vulcan Service Technician.
Reproduction or other use of this Manual, without the express
written consent of Vulcan, is prohibited.
K12ETT ON STAND
SERVICE MANUAL
ELECTRIC COUNTER TOP
TILTING KETTLES
K6ETT ML-136067
K12ETT ML-136068
K20ETT ML-136069
For additional information on Vulcan-Hart or to locate an authorized parts and
service provider in your area, visit our website at www.vulcanhart.com.
A product of VULCAN-HART LOUISVILLE, KY 40201-0696
F35496 (August 2009)

ELECTRIC COUNTER TOP TILTING KETTLES
TABLE OF CONTENTS
GENERAL ................................................................................3
Introduction ............................................................................3
Tools.................................................................................3
Specifications ..........................................................................4
REMOVALANDREPLACEMENTOFPARTS ....................................................5
Covers and Panels .....................................................................5
Electrical Panel Components - Water Level Control, Transformer, Contactors and Temperature Control . . . 5
Bottom Components - Water Level Probe (LLCO), Temperature Sensor and Pressure Switch ...........6
Potentiometer..........................................................................6
HeatingElement........................................................................7
KettleAssembly ........................................................................8
Bearings .............................................................................11
ShaftSeal............................................................................12
PivotStopPin.........................................................................13
SERVICEPROCEDURESANDADJUSTMENTS.................................................14
TemperatureControllerTest .............................................................14
PotentiometerTest.....................................................................15
Thermocouple Test .....................................................................15
HeatingElements......................................................................16
Venting ..............................................................................17
Filling the Reservoir Jacket ..............................................................17
ELECTRICALOPERATION..................................................................19
Component Function ...................................................................19
Component Location ...................................................................20
WaterLevelControl(WLCLLCO) .........................................................22
Sequence of Operation ..................................................................23
SchematicDiagram ....................................................................24
WiringDiagrams.......................................................................25
TROUBLESHOOTING......................................................................27
© VULCAN 2009
F35496 (August 2009) Page 2 of 28

ELECTRIC COUNTER TOP TILTING KETTLES - GENERAL
GENERAL
INTRODUCTION
General
The procedures in this manual apply to all models
unless otherwise specified. The pictures and
illustrations are of a model K6ETT countertop tilting
kettle unless otherwise noted. All information and
specifications contained in this manual are based on
the latest product information available at the time of
printing.
Countertop Tilting Kettles
The electric countertop tilting kettles are self
contained two thirds jacketed kettles. The lower two
thirds of the kettle bowl is a double wall stainless
steel construction that provides a reservoir for a
solution of heat transfer fluid and distilled water for
improved heating of the kettle contents. The kettles
are used to prepare a variety of liquid or semi-liquid
food products such as soups, stews and sauces.
MODELS COVERED
The 6 and 12 gallon kettles can be mounted to a
counter top or optional stand. The 20 gallon kettle is
a floor model mounted to its own stand.
Electric Countertop Tilting Kettles
K6ETT - 6 gallon
K12ETT - 12 gallon
K20ETT - 20 gallon
CONTROL PANEL
TOOLS
Standard
• Standard set of hand tools.
• Pipe thread sealant.
• VOM with an AC current tester (meter sensitivity
should be at least 20,000 ohms per volt).
• Temperature meter (thermocouple type). Use
for checking kettle temperature.
• 2 gallon container to hold drained reservoir
jacket fluid.
Special
• Torque wrench (ft-lbs) for tightening heating
element mounting bolts.
• Lubriplate 630-AA Part No. 501687 for
lubrication of tilt lock pivot stop pin.
• Loctite® ODC-Free Cleaner & Degreaser
(McMaster-Carr Part No. 66415A21) or
equivalent fast drying, no residue cleaner.
• Loctite® 7471™ Primer N™ Part No. 544434-2.
• Loctite® 242™ Part No. 520228.
F35496 (August 2009)
Page 3 of 28

ELECTRIC COUNTER TOP TILTING KETTLES - GENERAL
SPECIFICATIONS
Reservoir Jacket Fluid
• Water - Use only distilled water for partial re-filling of the jacket (purchase locally).
• Dowfrost heat transfer fluid Part No. 558038 (5 gallon). Use during a complete re-fill of the jacket with new
fluid. Refer to service procedures for volumes.
Electric
The kettle models listed in this manual, with exception of 480V steamers, are shipped pre-wired for 208/60/3
operation. Kettle heating element wiring change is required if connecting to 208/60/1, 240/60/1 or 240/60/3
electrical service.
ELECTRICAL SPECIFICATIONS
Volts Phase
K6ETT*K12ETT K20ETT
Total
KW Amps Total KW Amps Total KW Amps
208 1 7.50 36 12 58 12 58
240 1 10.0 42 16 67 16 67
208 3 7.5 22 12 33 12 33
240 3 10.0 26 16 39 16 39
480 3 7.50 9 12 14 12 14
*K6ETT only - Heating elements on 208/240VAC three phase machines are
not wired as a balanced load.
F35496 (August 2009) Page 4 of 28

ELECTRIC COUNTER TOP TILTING KETTLES - REMOVAL AND REPLACEMENT OF PARTS
REMOVAL AND REPLACEMENT OF PARTS
COVERS AND PANELS
Control Box Cover
Bottom Cover
ELECTRICAL PANEL
COMPONENTS - WATER LEVEL
CONTROL, TRANSFORMER,
CONTACTORS AND
TEMPERATURE CONTROL
1. Remove CONTROL BOX COVER.
2. Disconnect lead wires from component being
replaced.
3. Remove screws securing the component to
panel.
4. Reverse procedure to install and check for
proper operation.
F35496 (August 2009)Page 5 of 28

ELECTRIC COUNTER TOP TILTING KETTLES - REMOVAL AND REPLACEMENT OF PARTS
BOTTOM COMPONENTS -
WATER LEVEL PROBE (LLCO),
TEMPERATURE SENSOR AND
PRESSURE SWITCH
1. Open pressure relief valve until reservoir jacket
is completely vented.
2. Remove BOTTOM COVER.
3. Disconnect lead wires from component being
replaced.
4. If removing pressure switch:
A. Disconnect compression fitting from elbow
near the pressure switch.
B. Remove top nut on brass fitting to remove
pressure switch from mounting bracket.
5. Remove component from bottom of kettle.
6. Reverse procedure to install.
7. Remove air from reservoir jacket as outlined
under VENTING procedure.
8. Check for proper operation.
NOTE: Pressure switch setting is fixed and should
not be adjusted. Clean threads and apply pipe thread
sealant when replacing pressure switch, water level
probe or temperature sensor.
POTENTIOMETER
1. Remove CONTROL BOX COVER.
2. Disconnect potentiometer wire from
temperature control.
3. Pull temperature dial from potentiometer shaft
and remove seal nut.
4. Remove potentiometer from control panel.
5. Reverse procedure to install and check for
proper operation.
NOTE: When installing, ensure potentiometer
alignment tab is seated in positioning bracket.
F35496 (August 2009) Page 6 of 28

ELECTRIC COUNTER TOP TILTING KETTLES - REMOVAL AND REPLACEMENT OF PARTS
HEATING ELEMENT
1. Open pressure relief valve until reservoir jacket
is completely vented.
2. Tilt kettle to expose the heater access cover.
3. Remove three screws where indicated. Loosen
remaining screw and allow cover to rotate out of
way.
4. Note lead wire locations and disconnect wires
from heating element.
5. Remove mounting bolts securing heating
element to kettle.
6. Reverse procedure to install. Use a new heating
element seal whenever installing heating
element. Torque mounting bolts to 40 ft-lbs and
tighten in an alternating pattern.
7. Remove air from reservoir jacket as outlined
under VENTING.
8. Check for proper operation and leaks around
heating element.
NOTE: On K6ETT only, element lengths are
staggered to fit the contour of the kettle bottom.
Install with the shortest element toward the bottom of
kettle.
F35496 (August 2009)Page 7 of 28

ELECTRIC COUNTER TOP TILTING KETTLES - REMOVAL AND REPLACEMENT OF PARTS
KETTLE ASSEMBLY
Removal
1. Place kettle in full upright position.
2. Support kettle using 2x4 blocks of wood.
3. Remove CONTROL BOX COVER.
4. Disconnect thermocouple lead wires from
temperature control and the 4 pin wiring
harness connector.
5. Note lead wire locations and disconnect from
load side of contactors.
6. Remove wire tie securing lead wire bundle to
control box.
7. Remove three set screws on pivot stop collar.
Access third screw thru the slot in top of control
box.
8. Remove outer bearing from support shaft.
9. On K20ETT only.
A. Remove two bolts securing kettle tilt stop
to base.
B. Remove kettle support cover.
F35496 (August 2009) Page 8 of 28

ELECTRIC COUNTER TOP TILTING KETTLES - REMOVAL AND REPLACEMENT OF PARTS
C. Remove kettle support and bearing
housing assembly from support shaft.
10. Pull kettle assembly away from control box to
disengage support shaft from inner bearing and
pivot stop collar. Slide kettle onto the 2x4
blocks.
A. Pull lead wire bundle thru inner bearing
and pivot stop collar during removal.
NOTE: If support shaft of kettle assembly does
not easily disengage, apply force between
control box housing and kettle assembly to
release pivot stop collar. The support shaft
should slide out of inner bearing easily.
11. If re-installing kettle assembly, proceed to
Installation in this section. If installing a
replacement kettle assembly, remove
components as outlined below from old kettle
assembly for re-use.
A. Open pressure relief valve until reservoir
jacket is completely vented.
B. Place kettle on floor with the pressure relief
valve and reservoir jacket fill elbow facing
up.
C. Remove BOTTOM COVER.
D. Remove WATER LEVEL PROBE.
E. Position kettle assembly to drain fluid into
container. Remove 1/2" pipe plug from the
reservoir jacket fill elbow to facilitate
draining.
F. Remove TEMPERATURE SENSOR AND
PRESSURE SWITCH including
condensate coil.
G. Remove pressure relief valve assembly
plumbing and reservoir jacket fill elbow.
H. Remove HEATING ELEMENT.
I. Install all removed components onto
replacement kettle. Clean threads and
apply sealant before re-installing pipe
fittings.
Installation
NOTE: Bearings and shaft seal are self aligning for
easy installation. Bearings do not require lubrication.
1. Place kettle assembly on 2x4 blocks and align
support shaft to shaft seal. Pull lead wire bundle
thru shaft seal and inner bearing.
2. Push kettle assembly support shaft thru shaft
seal and inner bearing.
F35496 (August 2009)Page 9 of 28

ELECTRIC COUNTER TOP TILTING KETTLES - REMOVAL AND REPLACEMENT OF PARTS
3. Square the kettle assembly to control box
housing. Maintain squareness during
adjustments.
4. On K6ETT and K12ETT only.
A. Ensure the pour stop pin on kettle
assembly engages with tilt stop on control
box housing. Approximately 3/16" spacing
should be maintained between the pour
stop pin and control box housing. Adjust
kettle assembly position as necessary.
NOTE: The kettle assembly may drop slightly
after 2x4 blocks are removed and when fully
loaded. The spacing of pour stop pin will
prevent it from rubbing the control box during
tilt.
5. Insert lead wire bundle thru pivot stop collar.
Position pivot stop collar as shown in the picture
below. Set screws should remain out of collar.
A. Slide pivot stop collar onto support shaft.
Operate tilt lock then slide collar against
inner bearing. Hold the collar in position
and release tilt lock. Verify pivot stop pin
fully engages with the slot in pivot stop
collar for the tilt lock as shown. Adjust
kettle assembly position as necessary.
NOTE: The pin location shown will lock the
kettle fully upright. When the kettle is tilted, the
pin engages with the slot near the top to lock
the kettle in position.
6. Insert lead wire bundle thru the outer bearing.
Slide bearing onto support shaft and position it
against pivot stop collar. Install bolts and tighten
to secure the bearing.
7. Apply Lubriplate 630-AA to mating surfaces on
pivot stop pin. Ensure pivot stop pin fully
engages with the slot in pivot stop collar and
does not catch or bind when tilt lock is operated.
8. Clean threads (screw & hole) with cleaner &
degreaser. Apply Loctite 7471 Primer N and
Threadlocker 242 to set screws and threaded
holes on pivot stop collar.
F35496 (August 2009) Page 10 of 28