Groen TDH Series, TDHC-20, TDHC Series, TDH-20, TDH-24 Operator's Manual

OPERATOR MANUAL

IMPORTANT INFORMATION, KEEP FOR OPERATOR

1055 Mendell Davis Drive, Jackson, MS 39272
888-994-7636, fax [phone]
unifiedbrands.net

THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE. READ,
UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND WARNINGS
CONTAINED IN THIS MANUAL.

FOR YOUR SAFETY Instructions to be followed in the event user smells
gas. This information shall be obtained by consulting your local gas
supplier. As a minimum, turn off the gas and call your gas company and
your authorized service agent. Evacuate all personnel from the area.

PART NUMBER 174844, REV. F (03/19)

This manual provides information for:

STEAM JACKETED KETTLE

MODELS TDH(C)-20/24/40/48
(C,A,C2T™) DOMESTIC

WARNING Improper installation, adjustment, alteration, service or
maintenance can cause property damage, injury or death. Read the
installation, operating and maintenance instructions thoroughly before
installing or servicing this equipment.

NOTIFY CARRIER OF DAMAGE AT ONCE It is the responsibility of the
consignee to inspect the container upon receipt of same and to determine
the possibility of any damage, including concealed damage. Unified
Brands suggests that if you are suspicious of damage to make a notation
on the delivery receipt. It will be the responsibility of the consignee to file
a claim with the carrier. We recommend that you do so at once.

Manufacture Service/Questions 888-994-7636.

EQUIPMENT DESCRIPTION

TDH and TDHC models are stainless steel, steam-jacketed, table top mounted
kettles with a self-contained, gas heated steam source. The TDHC has a crank tilt
hand wheel, and the TDH has a handle that allows the operator to manually tilt the
kettle. The kettle body is welded into one solid piece and furnished with a rein­forced rim and welded-in “butterfly” shaped pouring lip. The interior of the kettle
is polished to a 180 emery grit finish, and the exterior is given a bright high buff
finish. The unit is A.S.M.E. shop inspected and registered with the National Board
for a design pressure of 50 PSIG.

The self-contained steam source is heated by propane or natural gas and is
equipped with electronic ignition. Charged at the factory with chemically pure wa­ter containing rust inhibitors, the steam source provides kettle temperatures of
150ºF to approximately 295ºF.

Controls for the TDHC unit include a crank tilt handwheel, thermostat, pressure
gauge, pressure relief valve, low water cut-off, On/Off switch, indicator lamp, gas
regulator valve, and water level sight glass. Controls for the TDH are the same as
the above, with the exception of the crank tilt hand wheel.

KLENZADE SALES CENTER ECOLAB, Inc.

REFERENCES

CSA INTERNATIONAL
8501 East Pleasant Valley Road
Cleveland, Ohio 44131

NSF INTERNATIONAL
798 N. Dixboro Rd.
P.O. Box 130140
Ann Arbor, Michigan 48113-0140

UNDERWRITERS LABORATORIES, INC.
333 Pfingsten Road
Northbrook, Illinois 60062

The gas supply shuts off automatically when the kettle is tilted.

The unit must be specified for use with natural gas or propane. For other gas types,
consult factory. Service connections are required for gas and 115V electricity.

Options available include:

1. One-piece, Lift-off cover

2. Holder for Lift-off Cover

3. Basket insert

4. Rice Strainer

5. Stand that supports the unit and holds a pan in position for filling

6. Water fill swing faucet

7. 316 stainless steel interior (must be indicated on initial order)

370 Wabasha
St. Paul, Minnesota 55102

NATIONAL FIRE PROTECTION ASSOCIATION
60 Battery March Park
Quincy, Massachusetts 02269

NFPA/54 -Installation Gas Appliances &
Piping
NFPA/70 - The National Electric Code

ZEP MANUFACTURING COMPANY
1310-T Seaboard Industrial Boulevard
Atlanta, Georgia 30318

Information contained in this document is known to be current and accurate at the time of printing/creation. Unified Brands
recommends referencing our product line websites, unifiedbrands.net, for the most updated product information and
specifications. © 2019 Unified Brands. All Rights Reserved. Unified Brands is a wholly-owned subsidiary of Dover Corporation.

IMPORTANT - READ FIRST - IMPORTANT

WARNING: FAILURE TO DISCONNECT POWER BEFORE SERVICING COULD RESULT IN

ELECTROCUTION AND DEATH.

WARNING: IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR

MAINTENANCE CAN CAUSE PROPERTY DAMAGE, INJURY OR DEATH. READ THE
INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS THOROUGHLY
BEFORE INSTALLING OR SERVICING THIS EQUIPMENT.

WARNING: THE UNIT MUST BE INSTALLED BY PERSONNEL QUALIFIED TO WORK WITH GAS,

ELECTRICITY AND PLUMBING. UNIT MUST BE INSTALLED IN ACCORDANCE WITH
ALL APPLICABLE CODES.

WARNING: DO NOT ATTACH THE UNIT TO A TYPE “B” VENT. IT COULD CAUSE FIRE OR

PROPERTY DAMAGE.

WARNING: DO NOT CONNECT ANY PIPING TO THE PRESSURE RELIEF VALVE. IT MUST BE

FREE TO VENT STEAM AS NEEDED. TO AVOID BURNS FROM THE VENTED STEAM
THE VALVE DISCHARGE SHOULD POINT DOWNWARD.

DANGER: ELECTRICALLY GROUND THE UNIT AT THE TERMINAL PROVIDED. FAILURE TO

GROUND THE UNIT COULD RESULT IN ELECTROCUTION AND DEATH.

CAUTION: BE SURE ALL OPERATORS READ, UNDERSTAND AND FOLLOW THE OPERATING

INSTRUCTIONS, CAUTIONS AND SAFETY INSTRUCTIONS CONTAINED IN THIS
MANUAL.

CAUTION: DO NOT OVERFILL THE KETTLE WHEN COOKING, HOLDING OR CLEANING. KEEP

LIQUIDS A MINIMUM OF 2-3” (5-8 CM) BELOW THE KETTLE BODY RIM TO ALLOW
CLEARANCE FOR STIRRING, BOILING AND SAFE TRANSFER OF PRODUCT.

CAUTION: KEEP FLOORS IN FRONT OF KETTLE WORK AREA CLEAN AND DRY. IF SPILLS

OCCUR, CLEAN IMMEDIATELY TO AVOID SLIPS OR FALLS.

WARNING: KEEP WATER AND SOLUTIONS OUT OF CONTROLS AND BURNERS. NEVER USE A

HIGH PRESSURE HOSE TO CLEAN KETTLE SURFACES.

CAUTION: MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS MEMBRANES

AND CLOTHING. TAKE PRECAUTIONS: WEAR RUBBER GLOVES, GOGGLES OR
FACE SHIELD AND PROTECTIVE CLOTHING. CAREFULLY READ WARNINGS AND
FOLLOW DIRECTIONS ON CLEANER LABELS.

WARNING: DO NOT STAND ON OR APPLY UNNECESSARY WEIGHT OR PRESSURE ON THE KETTLE

FRONT OR POURING LIP. THIS COULD RESULT IN THE OVERLOAD AND FAILURE OF
THE TILT MECHANISM, AND POSSIBLE SERIOUS INJURY AND BURNS TO THE
OPERATOR AND OTHERS.

NOTICE: NEVER LEAVE A SANITIZER IN CONTACT WITH STAINLESS STEEL SURFACES LONGER

THAN 30 MINUTES. LONGER CONTACT CAN CAUSE CORROSION.

WARNING: FAILURE TO PERIODICALLY CHECK PRESSURE RELIEF VALVE OPERATION COULD

RESULT IN PERSONAL INJURY AND/OR DAMAGE TO EQUIPMENT.

WARNING: WHEN TESTING, AVOID EXPOSURE TO THE STEAM BLOWING OUT OF THE PRESSURE

RELIEF VALVE. DIRECT CONTACT COULD RESULT IN SEVERE BURNS.

WARNING: TO AVOID INJURY, READ AND FOLLOW ALL PRECAUTIONS STATED ON THE LABEL OF

THE WATER TREATMENT COMPOUND.

WARNING: BEFORE REPLACING ANY PARTS, DISCONNECT THE UNIT FROM THE ELECTRIC

POWER SUPPLY AND CLOSE THE MAIN GAS VALVE. ALLOW FIVE MINUTES FOR GAS
TO VENT.

CAUTION: USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY THE

MANUFACTURER OR AUTHORIZED DISTRIBUTORS CAN CAUSE INJURY TO THE
OPERATOR AND DAMAGE TO THE EQUIPMENT AND WILL VOID ALL WARRANTIES.

WARNING: KEEP AREA AROUND KETTLE FREE AND CLEAR OF ALL COMBUSTIBLE MATERIALS.

FAILURE TO DO SO COULD RESULT IN FIRE OR PROPERTY DAMAGE.

CAUTION: HEATING AN EMPTY KETTLE MAY CAUSE THE RELEASE OF STEAM FROM THE

PRESSURE RELIEF VALVE.

IMPORTANT: SERVICE PERFORMED BY OTHER THAN FACTORY AUTHORIZED PERSONNEL WILL

VOID ALL WARRANTIES.

NOTICE: IT IS RECOMMENDED THAT AN INSTANT-READ THERMOMETER BE USED TO

CHECK THE INTERNAL TEMPERATURE THROUGHOUT THE COOKING PROCESS
AND AFTER THE COOKING PROCESS HAS BEEN COMPLETED TO ENSURE THE
FOOD HAS BEEN COOKED SUFFICIENTLY.

PERFORMANCE DATA

Model Firing Rate, BTU/hr

TDH-20, TDHC-20, TDH-24, TDHC-24 31,000

TDH-40, TDHC-40, TDH-48, TDHC-48 52,000

Model

TDH-20
(C,A,C2T)
TDHC-20
(C,A,C2T)

TDH-24
(C,A,C2T)
TDHC-24
(C,A,C2T)

TDH-40
(C,A,C2T)
TDHC-40
(C,A,C2T)

TDH-48
(C,A,C2T)
TDHC-48
(C,A,C2T)

Kettle

Capacity

5 Gal.

(20 Qt.)

19 liter 5.7 liter 356 mm 279 mm 711 mm 610 mm

6-Gal.

(24 Qt.)

23 liter 5.7 liter 356 mm 318 mm 711 mm 610 mm

10 Gal.
(40 Qt.)

38 liter 11.4 liter 419 mm 368 mm 711 mm 680 mm

12 Gal.
(48 Qt.)

45 liter 11.4 liter 419 mm 406 mm 711 mm 680 mm

Jacket

Capacity

6 Qt

6 Qt

12 Qt

12 Qt

Kettle

Body

Diameter

14

inches

14

inches

16-1/2
inches

16-1/2
inches

Kettle

Body

Depth

11

inches

12-1/2
inches

14-1/2
inches

16

inches

Base

Width

28

inches

28

inches

28

inches

28

inches

Base

Depth

24

inches

24

inches

26-3/4
inches

26-3/4
inches

INSPECTION & UNPACKING

CAUTION: SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT.

TAKE CARE TO AVOID PERSONAL INJURY OR DAMAGE TO THE UNIT BY
STAPLES LEFT IN THE WALLS OF THE CARTON.

CAUTION: THIS UNIT WEIGHS BETWEEN 214 AND 240 POUNDS (98 TO 109 KG)

DEPENDING ON SIZE. INSTALLER SHOULD USE PROPER EQUIPMENT TO
LIFT SAFELY.

The unit arrives completely assembled, except for the tilting handle on hand tilt
models which is shipped inside the kettle. The unit is strapped on a skid and in
a heavy carton. Inspect the carton carefully for damage. Open the container and
check the unit for hidden damage. Report shipping damage or shipment errors to
the delivery agent.

Write down the model number, serial number, and installation date for your unit at
the top of the Service Log at the end of this manual. Keep this manual with the unit.

To remove the kettle from the box, cut any straps from around the box. Detach the
box sides from the skid. Pull the box up off the unit, taking care to avoid damage
or injury from any staples left in the box walls. When installation is to begin, cut
the straps holding the kettle on the skid, and lift the kettle straight up off the skid.
Examine the packing materials to make sure no loose parts are discarded with the
materials. On hand tilt models, the tilting handle may be screwed into its socket.
Attach handle to the kettle on left side or right side as shown below.

2 OM-TDH(C)-20/24/40/48 (C,A,C2T™) Domestic

INSTALLATION

WARNING: THE UNIT MUST BE INSTALLED BY PERSONNEL WHO ARE QUALIFIED TO

DANGER: ELECTRICALLY GROUND THE UNIT AT THE TERMINAL PROVIDED. FAILURE

WARNING: THIS UNIT IS FOR COMMERCIAL USE. DO NOT USE HOME OR RESIDENTIAL

For efficient performance the kettle must be installed in a well-ventilated
area. Items which might restrict or obstruct the flow of air for combustion and
ventilation must be removed. The area directly around the appliance must be free
of combustible materials.

1. Installation can be on a combustible or noncombustible floor. Clearances

2. We recommends installation of the unit under a vent hood. The base must be

3. Complete the piping to the gas service main using ½ inch IPS pipe or an

4. Provide 115 VAC, 60 cycle, 1 phase, 1 AMP electric service. Local codes and/

5. Electrical connection to the unit must be water resistant sealtite conduit type

6. The installation must conform with local codes or the American National

7. Core probe storage bracket (C2T models only)

8. PRESSURE TEST WARNING

WORK WITH GAS, ELECTRICITY AND PLUMBING. IMPROPER INSTALLATION
CAN CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE EQUIPMENT.
THE UNIT MUST BE INSTALLED IN ACCORDANCE WITH APPLICABLE CODES.
THE UNIT MUST BE INSTALLED BY A LICENSED PLUMBER OR GAS FITTER
WHEN INSTALLED WITHIN THE COMMONWEALTH OF MASSACHUSETTS.

TO GROUND UNIT COULD RESULT IN ELECTROCUTION AND DEATH.

GRADE GAS CONNECTIONS. THEY DO NOT MEET GAS CODES AND COULD
BE HAZARDOUS.

should be per table below.

MINIMUM CLEARANCE FROM

COMBUSTIBLE WALLS

Left Side 1 in. 1 in.

Right Side 0 in. 12-16 in. for servicing

Rear 1 in. 3 in. for faucet bracket

RECOMMENDED

CLEARANCES

fastened to a working surface or stand.

approved equivalent.

or The National Electrical Code should be observed in accordance with ANSI/
NFPA-70 latest edition. AN ELECTRICAL GROUND IS REQUIRED. The electrical
schematic is located on the inside of the service panel and in this manual.

or equal and utilize the water resistant conduit fitting provided on the unit.

Standards Z223.1 - latest edition National Fuel Gas Code. The kettle should
be installed in an adequately ventilated room with provision for adequate air
supply. The best ventilation will employ a vent hood and exhaust fan with no
direct connection between the vent duct and the kettle flue. DO NOT obstruct
the flue or vent duct after installation.

a. It is recommend that the core probe storage bracket be installed on the

control console. It is not recommend that the core probe storage bracket
be installed on the kettle body or cover.

b. To obtain proper adhesion, the bonding surface must be unified, clean and

dry. Clean the bonding surface with rubbing alcohol and allow the surface
to dry. Next firmly apply pressure to the storage bracket to help improve
bond strength. After application, the bond strength will increase as the
adhesive flows onto the surface. At room temperature, approximately
50% of the ultimate strength will be achieved after 20 minutes, 90% after
24 hours and 100% after 72 hours.

a. Test pressure exceeding ½ PSIG (3.45 kPa). During pressure testing of the

gas supply piping system at pressures exceeding ½ PSIG, the appliance
and its individual shutoff valve must be disconnected from the gas supply
piping system.

b. Test pressure equal to or less than ½ PSIG (3.45 kPa). During pressure

testing of the gas supply piping system at pressures equal to or less than
½ PSIG, the kettle must be isolated from the gas supply piping system by
closing its individual manual shutoff valve.

9. Adequate space for proper servicing and operation is required. DO NOT block
any air intake spacings to the combustion chamber or obstruct air flow.

10. After the kettle has been connected to the gas supply, check all gas joints for
leaks. A soap solution or other suitable gas leak detector should be used. Do
not use flame when checking for leaks.

11. Once the unit is anchored to a mounting surface, apply a small bead of silicone
caulk around the perimeter of the kettle base and seal the joint.

12. Make sure the water level is correct in the jacket, by confirming that the
level is near the middle of the sight glass. If the water level is low, follow the
instructions in Jacket Filling and Water Treatment in the Maintenance section
of this manual.

13. Check to be sure that the open end of the elbow on the outlet of the pressure
relief valve is directed downward. Be sure to read and follow the instructions
on the attached pressure relief valve tag.

INITIAL START-UP

IMPORTANT: BE SURE ALL OPERATORS READ, UNDERSTAND AND FOLLOW THE OPERATING

WARNING: DO NOT STAND ON OR APPLY UNNECESSARY WEIGHT OR PRESSURE ON THE

The open end of the pressure relief valve

After the kettle has been installed, the installer should test to ensure that it is
operating correctly.

1. Remove literature and packing materials from inside and outside of the unit.

2. Add water to the kettle to a depth of at least one inch.

3. Make sure the supplies of gas and electric power are on.

4. Follow the “To Start Kettle Heating” instructions in the Operation section of

5. To turn off the unit, follow “To Stop Kettle Heating” in the Operation Section of

If the kettle functions as described, it is ready for use. If the unit does not operate
as designed, contact an authorized Service Agent.

INSTRUCTIONS, CAUTIONS, AND SAFETY INSTRUCTIONS CONTAINED IN THIS
MANUAL.

KETTLE FRONT OR POURING LIP. THIS COULD RESULT IN THE OVERLOAD AND
FAILURE OF THE TILT MECHANISM, AND POSSIBLE SERIOUS INJURY AND
BURNS TO THE OPERATOR AND OTHERS.

Correct water level.

elbow must face downward.

this manual. Begin heating the water at the highest thermostat setting. The
indicator light should come on and heating should continue until the water
boils.

this manual.

3 OM-TDH(C)-20/24/40/48 (C,A,C2T™) Domestic

OPERATION

3.0

WARNING: WHEN TILTING KETTLE:

1) WEAR PROTECTIVE OVEN MITT AND PROTECTIVE APRON.

2) USE DEEP CONTAINER TO CONTAIN AND MINIMIZE PRODUCT SPLASHING.

3) PLACE CONTAINER ON STABLE, FLAT SURFACE, AS CLOSE TO KETTLE AS

4) STAND TO RIGHT OF KETTLE WHILE POURING — NOT DIRECTLY IN POUR PATH

5) POUR SLOWLY, MAINTAINING CONTROL OF KETTLE, AND RETURN KETTLE

6) DO NOT OVERFILL CONTAINER. AVOID SKIN CONTACT WITH HOT CONTAINER

WARNING: AVOID ALL DIRECT CONTACT WITH HOT SURFACES AND HOT FOOD OR WATER IN

CAUTION: DO NOT OVERFILL THE KETTLE WHEN COOKING, HOLDING OR CLEANING.

WARNING: AVOID ALL DIRECT CONTACT WITH HOT FOOD OR WATER IN THE KETTLE.

CAUTION: HEATING AN EMPTY KETTLE MAY CAUSE THE RELEASE OF STEAM FROM THE

CAUTION: DO NOT TILT KETTLE BODY WITH COVER OR BASKET INSERT IN PLACE. COVER

CAUTION: ANY POTENTIAL USER OF THE EQUIPMENT MUST BE TRAINED IN SAFE AND

WARNING: KEEP AREA AROUND KETTLE FREE AND CLEAR OF ALL COMBUSTIBLE

CONTROLS

1. Classic Control (-C) Models

4 OM-TDH(C)-20/24/40/48 (C,A,C2T™) Domestic

POSSIBLE.

OF HOT CONTENTS.

BODY TO UPRIGHT POSITION AFTER CONTAINER IS FILLED OR TRANSFER IS
COMPLETE.

AND ITS CONTENTS.

THE KETTLE. DIRECT CONTACT COULD RESULT IN SEVERE BURNS.

KEEP LIQUIDS AT LEAST 2-3” (5-8 CM) BELOW THE KETTLE RIM TO ALLOW
CLEARANCE FOR STIRRING, BOILING AND SAFE PRODUCT TRANSFER.

DIRECT CONTACT COULD RESULT IN SEVERE BURNS.

PRESSURE RELIEF VALVE.

MAY SLIDE OFF, CAUSING INJURY TO OPERATOR.

CORRECT OPERATING PROCEDURES.

MATERIALS. DO NOT ATTEMPT TO LIGHT ANY BURNER WITH A FLAME.

Classic Control

Advanced Control

Cook2Temp Control

a. The manual gas shut-off valve supplies inlet gas to the unit.

b. Lighted Power ON switch located on the control console. Controls main

power to the unit.

c. The temperature knob, located on the control console, is used to set the

kettle heat values between 1 and 10.

d. Heating indicator light located on the control console, lights when the

controller sends call to open the main gas valve and will cycle on and off
once the unit reaches set temperature. If the unit is tilted, the main gas
valve will be disabled and the light will turn off until the unit is returned to
the cooking position.

e. A LOW WATER indicator light, located on the control console, illuminates

when the jacket water falls below acceptable levels. When lit, the main
gas valve is disabled and will not function until the jacket water is refilled
using the procedure in this manual.

f. On Crank tilt (TDHC) units, a handwheel controls the worm and gear

mechanism that smoothly tilts the kettle body and holds it in the desired
position.

2. Advanced Control (-A) Models

a. The manual gas shut-off valve supplies inlet gas to the unit.

b. Lighted Power ON switch located on the control console. Controls main

power to the unit.

c. The temperature knob, located on the control console, is used to set

the kettle heat values between 1.0 and 10.0. The current setting will be
reflected on the display.

d. Heating indicator light located on the control console, lights when the

controller sends call to open the main gas valve and will cycle on and off
once the unit reaches set temperature. If the unit is tilted, the main gas
valve will be disabled and the light will turn off until the unit is returned to
the cooking position.

e. A LOW WATER indicator light, located on the control console, illuminates

when the jacket water falls below acceptable levels. When lit, the main
gas valve is disabled and will not function until the jacket water is refilled
using the procedure in this manual.

f. SET TnnP Mode - Allows power to the controller and gas to the pilot without

the kettle heating; the kettle will heat once the LOW TEMP, MANUAL or
HIGH TEMP button is selected.

g. LOW TEMP Button – Used to set operating temperature of the kettle at a

preset low intensity (default = 2.0). Can be pressed at any time during
operation of the unit to change the set temperature to the preset value
except when there is an active TIMER enabled.

h. MANUAL Mode button – Enables the user modify the desired cooking

temperature of the kettle (between 1.0 and 10.0) using the temperature
knob and display (default = 5.0). The operator will press the MANUAL
button and set the desired temperature using the temperature knob and
display. Once the desired intensity is displayed, the user may either press
the MANUAL button again or wait 5 seconds and the set temperature will
be accepted by the controller and locked in. After the set temperature is
accepted, it may be changed at any time by pressing the MANUAL button
and resetting the temperature using the same process above.

i. HIGH TEMP button – Used to set operating temperature of the kettle at a

preset high intensity (default = 7.0). Can be pressed at any time during
operation of the unit to change the set temperature to the preset value
except when there is an active TIMER enabled.

1. TIMER button - once the appropriate set temperature is selected using
the HIGH TEMP, MANUAL or LOW TEMP buttons; a countdown timer
can be set to remind the user when the cooking process is completed.
Range – 1 minute to 10 hours

2. When the timer expires:

a. the set temperature will automatically change to the LOW TEMP

setting and will continue at this setting until the user changes the
temperature via MANUAL or HIGH TEMP buttons

b. An audible alarm will notify the user that attention is required,

the alarm will continue to sound until the user presses the TIMER
button.

3. An active timer can be cancelled by pressing and holding the TIMER
button for 5 secs.

4. Set temp can be changed during an active timer by pressing the
MANUAL button and adjusting the set temp using the Temperature
knob and display.

5. HIGH TEMP and LOW TEMP presets cannot be used to change the
setpoint once a TIMER has started.

j. READY alarm – The control will sound 3 beeps when the unit has reached

within 20 degrees of set point during pre-heat and when a higher set
temperature is selected.

k. On Crank tilt (TDHC) units, a handwheel controls the worm and gear

mechanism that smoothly tilts the kettle body and holds it in the desired
position.

3. Cook2Temp™ Control (-C2T™) Models

a. Lighted Power ON switch located on the control console. Controls main

power to the unit.

b. Heating indicator light located on the control console, lights when the

controller calls for the main gas valve to open and will cycle on and off
once the unit reaches set temperature. If the unit is tilted, the call for heat
will be interrupted and the light will turn off until the unit is returned to the
cooking position.

c. Low Water indicator light, located on the control console, lights when the

jacket water falls below the acceptable levels. When lit, the main gas valve
is disabled and will not function until the jacket water is refilled using the
procedure in the operator manual.

d. Set Mode – Allows power to the controller and the pilot to light, but

the main burners remain off. The kettle will heat once the LOW TEMP,
MANAUAL or HIGH TEMP button is selected.

e. LOW TEMP Button – Used to set a unit temperature of the kettle at a preset

low temperature (default = 175°F). Can be pressed at any time during
operation of the unit to change the unit temperature to the preset value
except when there is an active TIMER or an active Cook2Temp.

f. MANUAL Button – Enables the user to modify the unit temperature of

the kettle (between 100°F and 287°F) using the temperature knob and
display (default = 183°F). The operator will press the MANUAL button and
then select the desired unit temperature using the temperature knob and
display. Once the desired unit temperature is shown on the display, the
user may either press the MANUAL button again or wait 5 seconds and
the selected temperature will be accepted by the controller and locked in.
After the selected temperature is accepted it may be changed at any time
by pressing the MANUAL button and resetting the temperature using the
same process as above except when there is an active AUTO Cook2Temp.

g. HIGH TEMP Button – Used to set unit temperature of the kettle at a preset

high temperature (default = 287°F). Can be pressed at any time during
operation of the unit to change the unit temperature to the preset value
except when there is an active TIMER or an active Cook2Temp.

h. TIMER Button – Once the appropriate unit temperature is selected using

the LOW TEMP, MANUAL or HIGH TEMP buttons, a countdown timer can be
set to remind the user when the cooking process is completed.

1. Range – 1 minute to 10 hours.

2. When the timer expires:

a. The unit temperature will automatically change to the LOW TEMP

setting and will continue at this setting until the user changes the
temperature via MANUAL or HIGH TEMP buttons.

b. An audible alarm will notify the user that attention is required,

the alarm will continue to sound until the user presses the TIMER
button.

3. An active timer can be cancelled by pressing and holding the TIMER
button for 5 seconds.

4. Unit temperature can be changed during an active timer by pressing
the MANUAL button and adjusting the unit temperature using the
temperature knob and display.

5. LOW TEMP and HIGH TEMP presets cannot be used to change the unit
temperature once a TIMER has been enabled.

6. AUTO C2T and MANUAL C2T cannot be used once a timer has been
enabled. The timer must first be cancelled and then AUTO C2T or
MANUAL C2T can be enabled.

i. Ready alarm – The control will sound 3 beeps when the unit has reached

within 20 degrees of set point during pre-heat and when a higher unit
temperature is selected.

j. AUTO C2T Button – Enables the user to select a set product temperature

(between 100°F and 230°F) using the temperature knob and display.

The operator will press the AUTO C2T button and then select the set
product temperature using the temperature knob and display. Once the
set product temperature is shown on the display, the user may either
press the AUTO C2T button again or wait 5 seconds and the selected
temperature will be accepted by the controller and locked in. The unit
temperature is automatically set 100°F above the set product temperature
and cannot be changed at any time during an active AUTO C2T. After the
set product temperature is accepted it may be changed at any time by first
cancelling AUTO C2T and then using the same process as above to reset
the temperature.

1. After the set product temperature is accepted by the controller and
locked in. The unit will begin to heat and the display will scroll the
actual product temperature followed by the set product temperature.
This display will continue until the cook process has completed.

2. An active AUTO C2T can be cancelled by pressing and holding the
AUTO C2T button for 5 seconds and the unit will then return to Set
Mode.

3. LOW TEMP, MANUAL or HIGH TEMP presets cannot be used to change
the unit temperature once there is an active AUTO C2T. The unit
temperature is automatically set by the controller.

4. Once the set product temperature has been reached and held for 20
seconds consecutively the unit will automatically enable Hold Mode.

k. MANUAL C2T Button – Enables the user to select a set product

temperature (between 100°F and 230°F) using the temperature knob and
display. The operator will press the MANUAL C2T button and then select
the set product temperature using the temperature knob and display.
Once the set product temperature is shown on the display, the user may
either press the MANUAL C2T button again or wait 5 seconds and the
selected temperature will be accepted by the controller and locked in.
Once the set product temperature has been accepted the user will be
prompted to select a unit temperature via the MANUAL button. Once
the set unit temperature is shown on the display, the user may either
press the MANUAL C2T button again or wait 5 seconds and the selected
temperature will be accepted by the controller and locked in. After the set
product temperature and unit temperature are accepted the set product
temperature may be changed at any time by first cancelling MANUAL C2T
and then using the same process as above to reset the temperature.

1. After the set product temperature and unit temperature are accepted
by the controller and locked in. The unit will begin to heat and the
display will scroll the actual product temperature followed by the set
product temperature. This display will continue until the cook process
has completed.

2. An active MANUAL C2T can be cancelled by pressing and holding the
MANUAL C2T button for 5 seconds and the unit will then return to Set
Mode.

3. Unit temperature can be changed during an active MANUAL C2T by
pressing the MANUAL button and adjusting the unit temperature using
the temperature knob and display.

4. Once the set product temperature has been reached and held for 20
seconds consecutively the unit will automatically enable Hold Mode.

l. Hold Mode – Allows the unit to be controlled by the set product temperature

and core probe.

1. Hold Mode is automatically enabled once a set product temperature
has been reached and held for 20 seconds consecutively.

2. The display will scroll the actual product temperature followed by the
hold timer.

3. If the actual product temperature falls below 142°F.

a. An audible alarm along with the display flashing the actual

product temperature will notify the user that attention is required.

b. The alarm can be silenced by pressing any button.

5 OM-TDH(C)-20/24/40/48 (C,A,C2T™) Domestic

c. The Alarm will resound every 10 minutes until the actual product

temperature returns above 142°F.

4. If the actual product temperature rises 10°F above the set product
temperature.

a. An audible alarm along with the display flashing the actual

product temperature will notify the user that attention is required.

b. The alarm can be silenced pressing any button.

c. The alarm will resound every 10 minutes until the actual product

temperature returns to within 10°F of the set product temperature.

5. At initial hold timer completion (default = 4 hours).

a. An audible alarm will be given for 5 seconds.

b. The alarm can be silenced by pressing any button.

c. The alarm will continue to resound every 15 minutes until Hold

Mode is exited.

m. Display Descriptions

1. SEt nndE – Allows power to the controller without the pan heating, the
pan will heat once the LOW TEMP, MANUAL or HIGH TEMP button is
selected.

2. SEt PrOd tEnP – Indicates the desired finished product temperature.

3. SEt UnIt tEnP – Indicates the desired unit temperature.

4. SEt POInt – Indicates the set point for the desired finished product
temperature.

5. ACt – Indicates the actual product temperature.

6. CPEr – Indicates a core probe error and will continue to display until
the error has been resolved.

7. Prob – Indicates a unit probe error and will continue to display until
the error has been resolved.

8. End – Indicates the cooking process has completed.

9. End HOLd – Indicates the initial hold timer has completed.

4. Cook2Temp™ Control (-C2T™) Core Probe

a. Ensure the core probe has been properly cleaned and sanitized before

each use.

b. It is important that the tip of the core probe be placed correctly into

the product since only the tip of the core probe senses the product
temperature. Do this by inserting the core probe halfway into the product,
positioning the tip at the center of the food mass, avoiding any bones.
If placing into a semi-liquid or liquid product, occasionally stirring the
product will ensure an accurate core probe reading. Do not let the core
probe tip touch the edges, bottom or side of the unit.

c.

If the core probe is not plugged into the receptacle when either the AUTO C2T
or MANUAL C2T button is pressed then an audible alarm along with a core
probe error message will notify the user that attention is required. Simply
plug the core probe into the receptacle and continue with the input process.

d. If the core probe is unplugged from the receptacle during the cooking

process or while in Hold Mode an audible alarm along with a core probe
error message will notify the user that attention is required. Simply plug
the core probe back into the receptacle and the cook process or Hold
Mode will continue.

e. While the core probe is not in use ensure the sealing cap is properly

protecting the panel mount connector. Failure to properly use the sealing
cap could result in damage to the unit.

OPERATING PROCEDURE

1. To Start Kettle Heating:

a. EVERY DAY make sure that the jacket water level in the middle of the sight

glass. If the level is too low, see “Jacket Filling and Water Treatment” in
this manual.

b. Check the pressure/vacuum gauge. If the gauge does not show 20 to

30 inches of mercury (Hg) vacuum (that is a reading of 20 to 30 below 0
atmospheric pressure), see “Jacket Vacuum” in this manual.

c. DO NOT attempt to light any burner with a flame.

d. Open the main supply gas valve (handle in line with the pipe).

e. Turn the switch to ON.

f. Set heat using instructions above.

2. To Stop Kettle Heating:

a. Turn the switch OFF.

b. Turn the manual gas valve OFF (handle a right angle to gas line).

c. Disconnect the units electrical power.

3. To Relight Kettle:

a. Close main gas supply valve.

b. Set on-off switch to OFF.

c. Wait five minutes, then proceed as directed under To Start Kettle Heating.

4. If electric power fails, do not attempt to operate the unit. When power is
restored, proceed as directed in To Start Kettle Heating.

5. To Transfer Product or Empty Kettle:

a. Crank Tilt Kettles: The kettle body is tilted using the crank tilt handwheel.

Turning the crank counter-clockwise tilts the kettle body; clockwise
returns it to an upright position. The kettle body will remain in any tilted
position.

b. Hand Tilt Kettles: The kettle is designed to be tilted in a controlled manner.

Grasp the insulated plastic ball firmly. Maintain a firm grip on the handle
when tilting, keeping the kettle body in a tilted position or SLOWLY
returning the kettle body to an upright position.

Lift the rear of the lid first.

USE OF COMMON ACCESSORIES

1. Lift-Off Cover:

a. As with stock pot cooking, an optional lift off cover will speed up the

heating of water and food products. A cover helps retain heat in the
cooking vessel and reduces the amount of heat and humidity released
into the kitchen. Use of a cover can reduce some product cook times and
help maintain the temperature, color and texture of products being held or
simmered for extended periods.

b. Make sure the plastic ball handle is secure on the lift off cover before

using. ALWAYS use the plastic handle to place or remove cover from the
kettle. Wear protective oven mitts and a protective apron.

c. When putting the cover on the kettle, position it on top of kettle rim, with

its flat edge facing the pouring lip.

d. When removing cover:

1) Firmly grasp plastic handle

2) Lift rear edge (farthest from operator) 1-2” (3-5 cm) to allow any steam
and water vapor to escape the cooking vessel. Wait 2-3 seconds.

3) Tilt cover to 45-60° angle and allow any hot condensate or product to
roll off cover back into kettle.

6 OM-TDH(C)-20/24/40/48 (C,A,C2T™) Domestic

4) Remove cover, ensuring that any remaining hot condensate or product

WEAR EYE

PROTECTION

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another container, being sure to avoid
contact with hot product and hot basket
or. . .

f) Place basket with food on stable, at

surface, setting it inside a solid steamer
or bake pan, to catch any remaining hot
water which might drain from product.

c. Prepare a hot solution of the detergent/

cleaning compound as instructed by the
supplier.

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another container, being sure to avoid
contact with hot product and hot basket
or. . .

f) Place basket with food on stable, at

surface, setting it inside a solid steamer
or bake pan, to catch any remaining hot
water which might drain from product.

c. Prepare a hot solution of the detergent/

cleaning compound as instructed by the
supplier.

OM-TD

does not drip on operator, floor or work surfaces.

5) Place cover on safe, flat, sanitary, out-of-the-way surface, or return to
kettle rim. Cover may also be placed in the optional holder for cover
as shown in the photograph.

2. Basket Insert:

a. An optional kettle basket insert can assist in cooking water-boiled

products including eggs, potatoes, vegetables, shell fish, pasta and rice.
The nylon mesh liner must be used when cooking product smaller than
the mesh size of the basket, which is approximately 1/4” (6 mm). This
includes rice and small pasta shapes.

b. Tips For Use:

1) Allow for the water displacement of the basket and product to be
cooked. This may mean only filling the kettle half full of water. Test the
basket and product displacement with the kettle OFF, and with cold
water in the kettle.

2) Load basket on a level, stable work surface.

3) Lift the loaded basket with both hands. Get help from another person
if the basket is too heavy for safe handling. Then slowly lower product
into kettle.

4) When removing basket with cooked product, lift basket straight up,
ensuring bottom of basket clears the rim and pouring lip of the kettle.
Wear protective oven mitts and protective apron.

5) Allow hot water to fully drain from product, before moving basket
away from the kettle. Do not rest kettle basket on kettle rim or pouring
lip. If basket is too heavy for individual to lift and safely move, get help
from another person. Remove product immediately from basket into
another container, being sure to avoid contact with hot product and
hot basket or place basket with food on stable, flat surface, setting it
inside a solid steamer or bake pan, to catch any remaining hot water

CLEANING

WARNING: KEEP WATER AND SOLUTIONS AWAY FROM CONTROLS AND ELECTRICAL

CAUTION: MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS

CAUTION: NEVER LEAVE A SANITIZER IN CONTACT WITH STAINLESS STEEL SURFACES

WARNING: AVOID DIRECT CONTACT WITH HOT SURFACES. DIRECT SKIN CONTACT

draining from product.

EQUIPMENT. NEVER SPRAY THE SUPPORT HOUSING OR ELECTRICAL
CONNECTIONS.

MEMBRANES, AND CLOTHING. PRECAUTIONS SHOULD BE TAKEN. WEAR
RUBBER GLOVES, GOGGLES OR FACE SHIELD, AND PROTECTIVE CLOTHING.
READ THE WARNINGS AND FOLLOW THE DIRECTIONS ON THE LABEL OF
THE CLEANER CAREFULLY.

LONGER THAN 30 MINUTES. LONGER CONTACT CAN CAUSE CORROSION.

COULD RESULT IN SEVERE BURNS.

Use a brush, sponge, cloth, plastic or

rubber scraper, or plastic wool to clean.

Don’t use metal implements
or steel wool when cleaning.

SUGGESTED CLEANING SUPPLIES

1. Cleaner, such as Klenzade HC-10 or HC-32 from ECOLAB, Inc. or equivalent.

2. Kettle brushes in good condition

3. Sanitizer such as Klenzade XY-12.

4. Film remover such as Klenzade LC-30.

PRECAUTIONS

Before cleaning, shut off the kettle by turning the main power switch to “OFF,” and
shut off all electric power to the unit at a remote switch, such as the circuit breaker.

PROCEDURE

1. Clean food-contact surfaces as soon as possible after use. If the unit is in
continuous use, thoroughly clean and sanitize the interior and exterior at least
once every 12 hours.

2. Scrape and flush out food residues. Be careful not to scratch the kettle with
metal implements. (For DHT models only: After flushing the kettle, close the
draw-off valve.)

3. Prepare a hot solution of the detergent/ cleaning compound as instructed
by the supplier. Clean the unit thoroughly. A cloth moistened with cleaning
solution can be used to clean controls, housings, and electrical conduits.

4. Rinse the kettle and draw-off valve parts thoroughly with hot water, then drain
completely.

5. As part of the daily cleaning program, clean soiled external and internal
surfaces. Remember to check the sides of the unit and control housing,
underside of cover, etc.

6. To remove burnt on foods, use a brush, sponge, cloth, plastic or rubber scraper,
or plastic wool with the cleaning solution. To reduce effort required in washing,
let the detergent solution sit in the kettle and soak into the residue. Do NOT use
abrasive materials or metal tools that might scratch the surface. Scratches
make the surface harder to clean and provide places for bacteria to grow.
Do NOT use steel wool, which may leave particles in the surface and cause
eventual corrosion and pitting.

7. The outside of the unit may be cleaned with a warm water (100°F or less)
spray. Do not use a high pressure spray.

8. The outside of the unit may be polished with a stainless steel cleaner such as
“Zepper” from Zep Manufacturing Co.

9. When equipment needs to be sanitized, use a solution equivalent to one that
supplies 200 parts per million available chlorine. Obtain advice on sanitizing
agents from your supplier of sanitizing products.

10. It is recommended that each piece of equipment be sanitized just before use.

11. Clean the kettle thoroughly. If there is difficulty removing mineral deposits or a
film left by hard water or food residues, then use a de-liming agent, following
manufacturer directions.

12. Rinse and drain the unit thoroughly before further use.

13. If cleaning problems persist, contact your cleaning product representative for
assistance. The supplier has a trained technical staff with laboratory facilities
to serve you.

CLEANING CORE PROBE

Remove all food soil from core probe by wiping entire core probe and cable
assembly with warm detergent solution and a clean cloth. Remove detergent
solution by wiping core probe and cable assembly with clean rinse water and a
cloth. Allow core probe and cable assembly to air dry. Do not immerse core probe.
Hand wash only and immediately let air dry.

7 OM-TDH(C)-20/24/40/48 (C,A,C2T™) Domestic

MAINTENANCE

WARNING: AVOID ANY EXPOSURE TO THE STEAM BLOWING OUT OF THE PRESSURE

CAUTION: KEEP GREASE AWAY FROM ELECTRICAL PARTS LOCATED NEAR THE

WARNING: TO AVOID INJURY, READ AND FOLLOW ALL PRECAUTIONS STATED ON THE

WARNING: USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY

CAUTION: INSURE ELECTRICAL POWER IS REMOVED AND THE GAS IS TURNED OFF AT

WARNING: THIS KETTLE IS DESIGNED TO BE WATER RESISTANT. FAILURE TO FOLLOW

The pressure gauge should show a vacuum of 20 to

PERIODIC MAINTENANCE

NOTICE: Contact an authorized representative when repairs are required.

A Maintenance & Service Log is provided at the back of this manual. Each time
maintenance is performed on your kettle, enter the date on which the work was
done, what was done, and who did it. Keep this manual on file and available
for operators to use. Periodic inspection will minimize equipment down time and
increase the efficiency of operation. The following points should be checked:

JACKET VACUUM/REMOVING AIR FROM JACKET

When the kettle is cold, a positive pressure reading on the pressure/vacuum gauge
or a reading near zero indicates that there is air in the jacket. Air in the jacket acts
as an insulator, and slows kettle heating.

To remove air:

1. Start the unit. (Be sure there is water or product in the kettle when heating).

2. When the pressure/vacuum gauge reaches a positive pressure reading of five

3. If there is little discharge (mostly air), and the pressure gauge drops back to

8 OM-TDH(C)-20/24/40/48 (C,A,C2T™) Domestic

RELIEF VALVE. SEVERE BURNS CAN RESULT ON EXPOSED SKIN. FAILURE
TO CHECK PRESSURE RELIEF VALVE OPERATION PERIODICALLY COULD
RESULT IN PERSONAL INJURY AND/OR DAMAGE TO EQUIPMENT.

GEARS.

LABEL OF THE WATER TREATMENT COMPOUND.

THE MANUFACTURER OR THEIR AUTHORIZED DISTRIBUTORS CAN CAUSE
INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT AND WILL
VOID ALL WARRANTIES.

THE SHUTOFF VALVE PRIOR TO PERFORMING ANY MAINTENANCE ON THIS
KETTLE.

PROPER MAINTENANCE PROCEDURES MAY VOID THE WARRANTY.

The open end of the pressure relief valve

30 inches when the kettle is cold

The pressure relief valve and fill plug are located directly

behind the pressure/vacuum gauge.

elbow must face downward.

PSI, release the trapped air and steam by pulling up the safety valve ring for
about five seconds. Repeat this step three or four times. Then let the pull ring
snap back into the closed position.

zero PSI, allow the pressure to build back to five PSI and repeat the procedure.

4. Once steam has been vented from the jacket as described in b, above, remove
the hot water from the kettle and replace it with cold. This will condense steam
in the kettle jacket, and the pressure gauge should show a reading of 20 to
30 inches mercury (Hg) below zero. If it does not, or if the vacuum is leaking
down, contact a Groen authorized service agency to correct the problem.

PRESSURE RELIEF VALVE

At least twice a month, test the pressure relief valve. Test the valve with the kettle
operating at 15 PSI (105 kPa), by holding the test ring for at least five seconds. Then
release the ring and permit the valve to snap shut. If the ring does not activate, if
there is no discharge, or if the valve leaks, stop using the kettle immediately and
contact a authorized service representative.

GREASE / LUBRICATION

1. Hand Tilt Models

At least twice a year, grease the two trunnion bearings. The bearings are
located within the kettle support housing. Remove the access panels from the
support housing with a screwdriver to gain access to the grease fittings. Use
a lithium-based, multi-purpose grease. When the access panels are removed,
the mounting bolts for the trunnion bearings and tilt switch can also be checked
for tightness. When finished, reassemble access panels to support housing.

2. Crank Tilt Models

The gear housing has been fitted for proper lubrication of moving parts.

Since the gears do not run in oil, periodic lubrication with grease is essential.
Frequency of lubrication depends on operating conditions, but should occur
at least once every six months. The use of a Number Two grade LGI lithium
grease is recommended. Add grease through the Zerk fittings on the gear
housing until grease flows out of the bearings around the trunnion shaft. Place
a liberal amount of grease on the gear to cover the arc that is in contact with
the worm gear.

JACKET FILLING AND WATER TREATMENT

The jacket was charged at the factory with the proper amount of treated water.
You may need to restore this water, either because it was lost as venting steam or
by draining. If you are replacing water lost as steam, use distilled water. If you are
replacing treated water that ran out of the jacket, prepare more treated water as
directed in “Water Treatment Procedure,” below.

1. If you are replacing water lost as steam, use distilled water. Do not use tap
water. If you are replacing treated water that was drained from the jacket,
prepare more treated water as directed below.

2. Allow the kettle to cool completely. Remove the pipe plug from the jacket fill
assembly. Pour in the distilled or treated water. Using a funnel will help you
in this process. Hold the pressure relief valve open while you pour, to let air
escape from the jacket. Continue adding water until the water level rises to the
center of the round sight glass.

3.

Air that gets into the jacket during the filling operation must be removed, because
it will make heating less efficient. Follow the procedure in Jacket Vacuum/
Removing Air From Jacket above, to restore a negative pressure reading.

WATER TREATMENT PROCEDURE

1.

Obtain water treatment compound and a pH test kit from your Groen Service Agent.

2. Fill a mixing container with the measured amount of water required. Use only
distilled water.

Model Kettle Capacity Jacket Capacity

TDH-20 (C,A), TDHC-20 (C,A,C2T) 5 gal (20 qt), 19 liter 6 quart, 5.7 liter

TDH-24 (C,A), TDHC-24 (C,A,C2T) 6 gal (24 qt ), 23 liter 6 quart, 5.7 liter

TDH-40 (C,A), TDHC-40 (C,A,C2T) 10 gal (40 qt), 38 liter 12 quart, 11.4 liter

TDH-48 (C,A), TDHC-48 (C,A,C2T) 12 gal (48 qt), 45 liter 12 quart, 11.4 liter

3. Hang a strip of pH test paper on the rim of the container, with about 1 inch of
the strip below the surface of the water.

4. Measure the water treatment compound. One way to do this is to add the
compound from a measuring cup.