Dover unified brands groen DH-20 User manual

OPERATOR MANUAL
IMPORTANT INFORMATION, KEEP FOR OPERATOR
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.
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.
PART NUMBER 177049, REV. E (10/20)
This manual provides information for:
STEAM JACKETED KETTLE WITH STANDARD
ELECTRONIC IGNITION
MODELS DH(T)-20/40/60/80 &
DH(T)-20/40/60/80(C,A) DOMESTIC & CE
EQUIPMENT DESCRIPTION
The Groen DH is a floor-mounted, tilting, steam jacketed kettle with a
thermostatically or electronically controlled, self-contained, gas-heated steam
source and appropriate controls, mounted on a sturdy base. The Model DH is
available in 20, 40, 60 or 80 gallon capacities.
The body of the DH Kettle is constructed of stainless steel, welded into one
solid piece. The kettle is furnished with a reinforced rim and a butterfly shaped
pouring lip. It has a steam jacket which is ASME shop inspected and registered
with the national board for working pressures up to 50 PSI, 3.45 bars. Kettle
finish is 180 emery grit on the inside and bright high buff polish on the outside.
The kettle is tilted with a hand crank to pour out its contents. Stainless steel
panels enclose the controls and the base. Four stainless steel tubular legs
support the unit. Bullet or flanged feet on each of the legs can be adjusted to
level the kettle. Standard DHT units include a two inch tangent draw-off valve.
The self-contained steam source is heated by propane or natural gas. Ignition
is electronic.
The kettle is charged at the factory with chemically pure water which contains
rust inhibitors. The steam source provides kettle temperatures of 150º to
approximately 295ºF (65 to 150ºC). Unit controls include a thermostat or
controller, pressure gauge, safety valve, pressure limit control, low water cut-
off, power switch and gas regulator valve. The gas supply shuts off automatically
when the kettle is tilted.
The unit must be specified for use with natural or propane gas. Service
connections for gas and electricity are required. Standard power supply is 115
Volt (domestic) or 230V (CE). Alternate single-phase voltages (208-240V) are
available.
KETTLE DIMENSIONS
DH/DHT-20 DH/DHT-40 DH/DHT-60 DH/DHT-80
Kettle
Capacity
20 gal.
(75 ltr)
40 gal.
(150 ltr)
60 gal.
(225 ltr)
80 gal.
(302 ltr)
Kettle Body
Diameter
20 in.
(508 mm)
26 in.
(660 mcm)
30 in.
(762 mm)
34 in.
(863 mm)
Base Width 35 in.
(889 mm)
47 in.
(1194 mm)
47 in.
(1194 mm)
52 in.
(1320 mm)
Base Front to Back 29 in.
(736 mm)
29 in.
(736 mm)
29 in.
(736 mm)
37.5 in.
(952 mm)
REFERENCES
CSA INTERNATIONAL
8501 East Pleasant Valley Road
Cleveland, Ohio 44131
NATIONAL SANITATION FOUNDATION
3475 Plymouth Road
Ann Arbor, Michigan 48106
KLENZADE SALES CENTER ECOLAB, Inc.
370 Wabasha
St. Paul, Minnesota 55102
ZEP MANUFACTURING COMPANY
1310-T Seaboard Industrial Boulevard
Atlanta, Georgia 30318
AMERICAN NATIONAL STANDARDS INST.,
Inc.
1430 Broadway
New York, New York 10018
Z223.1-1984 - National Fuel Gas Code
Z21.30 - Installation Gas Appliances &
Piping
NATIONAL FIRE PROTECTION ASSOCIATION
60 Battery march Park
Quincy, Massachusetts 02269
NFPA/54 -Installation Gas Appliances &
Piping
NFPA/70 - The National Electric Code
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. © 2020 Unified Brands.All Rights Reserved. Unified Brands is a wholly-owned subsidiary of Dover Corporation.
2016 Gees Mill Road, Suite 200, Conyers, GA 30013
888-994-7636, fax [phone]
unifiedbrands.net

2 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
Available Options:
1. 2” (50.8 mm) tangent drawoff standard on DHT models
2. Strainers, solid disk, 1/4” (6.35mm) or 1/8” (3.18mm) holes
3. No. 31 lift-off cover
4. No. 51 counterbalanced cover w/actuator*
5. Basket Inserts (Tri-BC)
6. Water fill faucets with swing spout
7. Kettle Brush Kit
IMPORTANT - READ FIRST - IMPORTANT
IMPORTANT: THESE APPLIANCES MUST BE INSTALLED BY A COMPETENT PERSON IN
CONFORMITY WITH THE INSTALLATION AND SERVICING INSTRUCTIONS
AND NATIONAL REGULATIONS IN FORCE AT THE TIME. PARTICULAR
ATTENTION MUST BE PAID TO THE FOLLOWING (CE):
I. E. E. REGULATIONS FOR ELECTRICAL INSTALLATIONS
ELECTRICITY AT WORK REGULATIONS
GAS SAFETY (INSTALLATION & USE REGULATIONS
HEALTH AND SAFETY AT WORK ACT
FIRE PRECAUTIONS ACT
LOCAL AND NATIONAL BUILDING REGULATIONS
DETAILED RECOMMENDATIONS ARE CONTAINED IN INSTITUTE OF GAS
ENGINEERS PUBLISHED DOCUMENTS: IGE/UP/1, IGE/UP/2, BS6173 AND
BS5440 (CE).
THESE APPLIANCES HAVE BEEN CE-MARKED ON THE BASIS OF
COMPLIANCE WITH THE GAS APPLIANCE DIRECTIVE, EMC AND LOW
VOLTAGE DIRECTIVE FOR THE COUNTRIES, GAS TYPES AND PRESSURES
AS STATED ON THE DATA PLATE.
WARNING: TO PREVENT SHOCKS, ALL APPLIANCES WHETHER GAS OR ELECTRIC,
MUST BE EARTHED.
ON COMPLETION OF THE INSTALLATION, THESE INSTRUCTIONS SHOULD
BE LEFT WITH THE ENGINEER-IN-CHARGE FOR REFERENCE DURING
SERVICING. FURTHER TO THIS, THE USERS INSTRUCTIONS SHOULD
BE HANDED TO THE USERS AND THE INSTALLER SHOULD INSTRUCT
THE RESPONSIBLE PERSON(S) IN THE CORRECT OPERATION AND
MAINTENANCE OF THE APPLIANCE. EMPHASIS SHOULD BE MADE WITH
REGARD TO SAFE OPERATION OF DRAIN VALVE.
IT IS MOST IMPORTANT THAT THESE INSTRUCTIONS BE CONSULTED
BEFORE INSTALLING AND COMMISSIONING THE APPLIANCE. FAILURE TO
COMPLY WITH THE SPECIFIED PROCEDURES MAY RESULT IN DAMAGE OR
THE NEED FOR A SERVICE CALL.
CAUTION: SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT.
WARNING: DISCONNECT POWER BEFORE SERVICING. FAILURE TO DISCONNECT
COULD RESULT IN ELECTROCUTION AND DEATH.
CAUTION: UNIT WEIGHS 535 TO 973 LB. (245 TO 400 KG). FOR SAFE HANDLING,
INSTALLER SHOULD OBTAIN HELP AS NEEDED, OR EMPLOY APPROPRIATE
MATERIALS HANDLING EQUIPMENT (SUCH AS A FORKLIFT, DOLLY, OR
PALLET JACK) TO REMOVE THE UNIT FROM THE SKID AND MOVE IT TO THE
PLACE OF INSTALLATION.
WARNING: INSTALLATION OF THE KETTLE MUST BE DONE BY PERSONNEL QUALIFIED
TO WORK WITH GAS AND ELECTRICITY. IMPROPER INSTALLATION CAN
RESULT IN INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT.
WARNING: THIS UNIT IS DESIGNED FOR COMMERCIAL USE. NEVER USE HOME
OR RESIDENTIAL GRADE GAS CONNECTIONS. THEY DO NOT MEET
COMMERCIAL GAS CODES AND COULD BE HAZARDOUS.
DANGER: ELECTRICALLY GROUND THE UNIT AT THE TERMINAL PROVIDED. FAILURE
TO GROUND UNIT COULD RESULT IN ELECTROCUTION AND DEATH.
WARNING: DO NOT CONNECT ANY PIPING TO THE POP SAFETY VALVE, THE VALVE
MUST BE FREE TO VENT STEAM AS NEEDED.THE ELBOW ATTACHED TO THE
SAFETY VALVE SHOULD POINT TO THE FLOOR. IMPROPER INSTALLATION
WILL VOID WARRANTY.
WARNING: FAILURE TO CHECK SAFETY VALVE OPERATION PERIODICALLY COULD
RESULT IN PERSONAL INJURY AND/OR DAMAGE TO EQUIPMENT.
WARNING: WHEN TESTING SAFETY VALVE, AVOID ANY EXPOSURE TO THE STEAM
BLOWING OUT OF THE SAFETY VALVE. DIRECT CONTACT WITH STEAM
COULD RESULT IN SEVER BURNS.
WARNING: KEEP THE APPLIANCE AREA FREE AND CLEAR OF COMBUSTIBLE MATERIALS.
FAILURE TO DO SO COULD RESULT IN FIRE OR PROPERTY DAMAGE.
CAUTION: BE SURE ALL OPERATORS READ, UNDERSTAND AND FOLLOW THE OPERATING
INSTRUCTIONS, CAUTIONS AND SAFETY INSTRUCTIONS CONTAINED IN THIS
MANUAL.
CAUTION: KEEP FLOORS IN KETTLE WORK AREA CLEAN AND DRY. IF SPILLS OCCUR,
CLEAN IMMEDIATELY TO AVOID THE DANGER OF SLIPS OR FALLS.
WARNING: WHEN TILTING KETTLE FOR PRODUCT TRANSFER:
1) USE CONTAINER DEEP ENOUGH TO CONTAIN AND MINIMIZE PRODUCT
SPLASHING.
2) PLACE CONTAINER ON STABLE, FLAT SURFACE, AS CLOSE TO KETTLE AS
POSSIBLE.
3) STAND TO SIDE OF KETTLE WHILE POURING — NOT DIRECTLY IN POUR
PATH OF HOT CONTENTS.
4) RETURN KETTLE BODY TO LEVEL POSITION AFTER CONTAINER IS FILLED OR
TRANSFER IS COMPLETE.
5) DO NOT OVERFILL CONTAINER, AVOIDING DIRECT SKIN CONTACT WITH HOT
CONTAINER AND ITS CONTENTS.
WARNING: DO NOT HEAT AN EMPTY KETTLE. EXCESSIVE STEAM PRESSURE COULD
DEVELOP.
WARNING: IF THE KETTLE CONTAINS ITEMS IN HOT LIQUIDS SUCH AS SAUCE OR MELTED
FAT, THEY CAN SLIDE FORWARD SUDDENLY DURING TILTING AND CAUSE THE
HOT LIQUID TO SPLASH OUT.
WARNING: AVOID ALL DIRECT CONTACT WITH HOT FOOD PRODUCT OR WATER IN THE
KETTLE. DIRECT CONTACT COULD RESULT IN SEVERE BURNS.
CAUTION: DO NOT OVER FILL 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 PRODUCT TRANSFER.
WARNING: IT IS RECOMMENDED THAT WATER AND SOLUTIONS BE KEPT OUT OF
CONTROLS AND BURNERS. DO NOT USE HIGH PRESSURE SPRAY DIRECTLY ON
THE CONTROL CONSOLE, ELECTRICAL CONNECTIONS AND BURNERS. USE A
GARDEN HOSE SPRAY CONNECTED TO CITY WATER SUPPLY.
CAUTION: MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS MEMBRANES
AND CLOTHING. PRECAUTIONS SHOULD BE TAKEN TO WEAR RUBBER GLOVES,
GOGGLES OR FACE SHIELD AND PROTECTIVE CLOTHING. CAREFULLY READ THE
WARNINGS AND FOLLOW THE DIRECTIONS ON THE LABEL OF THE CLEANER TO BE
USED. FAILURE TO DISCONNECT COULD RESULT IN ELECTROCUTION AND DEATH.
WARNING: BEFORE REPLACING ANY PARTS, DISCONNECT THE UNIT FROM THE ELECTRIC
POWER SUPPLY AND CLOSE THE MAIN GAS COCK. ALLOW FIVE MINUTES FOR
UNBURNED GAS TO VENT.
CAUTION: USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY
AUTHORIZED DISTRIBUTORS CAN CAUSE INJURY TO THE OPERATOR AND
DAMAGE TO THE EQUIPMENT AND WILL VOID ALL WARRANTIES.
IMPORTANT : SERVICE PERFORMED BY OTHER THAN GROEN AUTHORIZED SERVICE AGENT
WILL VOID ALL WARRANTIES.
CAUTION: THIS APPLIANCE CAN BE USED BY CHILDREN AGED FROM 8 YEARS AND
ABOVE AND PERSONS WITH REDUCED PHYSICAL, SENSORY OR MENTAL
CAPABILITIES OR LACK OF EXPERIENCE AND KNOWLEDGE IF THEY HAVE BEEN
GIVEN SUPERVISION OR INSTRUCTION CONCERNING USE OF THE APPLIANCE
IN A SAFE WAY AND UNDERSTAND THE HAZARDS INVOLVED.
CAUTION: CHILDREN SUPERVISED ARE NOT TO PLAY WITH THIS APPLIANCE.
CAUTION: CLEANING AND USER MAINTENANCE SHALL NOT BE MADE BY CHILDREN
WITHOUT SUPERVISION.
CAUTION: FOR APPLIANCES INTENDED FOR USE AT ALTITUDES EXCEEDING 2,000 M, THE
MAXIMUM ALTITUDE WILL BE STATED OR MARKED ON APPLIANCE.
PERFORMANCE DATA (DOMESTIC)
Model DH/DHT-20 DH/DHT-40 DH/DHT-60 DH/DHT-80
BTU/hr 72,000 100,000 150,000 150,000
kW 21.1 29.3 44.0 44.0

3 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
PERFORMANCE DATA (CE)
Model DH/DHT-20 DH/DHT-40 DH/DHT-60
(G20) kW 19.0 26.4 31.6
BTU/hr 64,800 89,900 107,900
(G31) kW 19.4 24.3 32.3
BTU/hr 66,200 82,700 110,300
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 535 AND 978 POUNDS (245 TO 400 KG)
DEPENDING ON SIZE. INSTALLER SHOULD USE PROPER EQUIPMENT TO
LIFT SAFELY.
The unit will arrive in a heavy shipping carton and will be bolted or banded to a
skid. Immediately upon receipt, inspect the carton carefully for exterior damage.
Carefully cut any polyester straps around the carton and detach the sides of the box
from the skid. Pull the carton up off the unit. Thoroughly inspect the unit for hidden
damage. Report any shipping damage or incorrect shipments to the delivery agent.
Write down the model number, serial number, and installation date, and retain this
information for future reference. Space for these entries is provided at the top of
the Service Log at the back of this manual. Keep this manual on file and available
for operators to use.
When installation is to begin, carefully cut any straps which hold the unit on the
skid. Lift the unit straight up off the skid. Examine packing materials to be sure
loose parts are not discarded with the materials.
INSTALLATION
DOMESTIC
WARNING: THE UNIT MUST BE INSTALLED BY PERSONNEL WHO ARE QUALIFIED TO
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.
DANGER: ELECTRICALLY GROUND THE UNIT AT THE TERMINAL PROVIDED. FAILURE
TO GROUND UNIT COULD RESULT IN ELECTROCUTION AND DEATH.
WARNING: DO NOT CONNECT ANY PIPING TO THE PRESSURE RELIEF VALVE. THE VALVE
MUST BE FREE TO VENT STEAM AS NEEDED. IMPROPER INSTALLATION
WILL VOID THE WARRANTY! THE ELBOW ATTACHED TO THE PRESSURE
RELIEF VALVE MUST POINT TO THE FLOOR.
The open end of the pressure relief valve
elbow must face downward.
When attaching the draw-off
valve, hand-tighten the nut.
For efficient performance the DH 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
should be per table below.
MINIMUM
CLEARANCE FROM
COMBUSTIBLE
WALLS
MINIMUM
CLEARANCE FROM
NON-COMBUSTIBLE
WALLS
RECOMMENDED
CLEARANCES
Left Side 6 in. 0 in. 6 in.
Right
Side 6 in. 0 in. 10 in.
Rear 10 in. 10 in. 12 in.
2. The kettle should be installed in an adequately ventilated room with provision
for adequate air supply. The ventilation must 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.
3. Set the kettle in place and level it using a spirit level on the bar rim, by turning
the bullet or flange feet to adjust leg length. Allow clearance around the unit
for cleaning, maintenance and service.
4. Complete the piping to the gas service main with ½” line or approved
equivalent.
5. Provide 115 vac, 60 Hz, single phase 5 AMP electrical service. The unit may
also be ordered for alternate electric service of 208 VAC - 240 VAC. Observe
local codes and/or The National Electrical Code in accordance with ANSI/
NFPA 70 (current edition), or the Canadian Electrical Code, CSA C22.2 (current
edition), as applicable. Use the wiring diagram inside the service panel and at
the rear of this manual.
6. Bring electrical service through the entrance at the rear of the support housing
with a ½ inch conduit connector. Make a watertight connection with the
incoming lines.
7. Electrically ground the unit at the terminal provided.
8. After the kettle has been connected to the gas supply, check all gas joints for
leaks. DO NOT USE FLAME TO CHECK FOR LEAKS. A thick soap solution or
other suitable leak detector should be employed.
9. The gas supply and unit’s installation must conform with local codes or in the
absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA
54 (current edition), or the Natural Gas and Propane Installation Code CSA
149.1(current edition), as applicable. Additionally following must be complied
with: THE AREA DIRECTLY AROUND THE APPLIANCE MUST BE CLEARED OF
ALL COMBUSTIBLE MATERIAL. FAILURE TO FOLLOW THESE INSTRUCTIONS
CAN CAUSE BODILY INJURY AND /OR PROPERTY DAMAGE. The appliance and
its individual shut-off valve must be disconnected from the gas supply piping
system during any testing at pressures in excess of ½ PSI (3.45 kPa). The
appliance must be isolated from the gas supply piping system by closing its
individual manual shut-off valve during any pressure testing at or less than ½
PSI (3.45 kPa).
10. Confirm that the jacket water level is between the gauge glass markers or
inside the sight glass port. If the level is low, follow instructions under “Jacket
Filling and Water Treatment,” Page 16.
11. The open end of the elbow on the outlet of the safety valve must face
downward. If it does not, turn it to the correct position.
12. For units with optional tangent draw off: Assemble the tangent draw-off by
placing the large nut over the draw-off valve and inserting it into the draw-off
tube. ONLY HAND-TIGHTEN THE NUT to complete installation.

4 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
CE
WARNING: THE UNIT MUST BE INSTALLED BY PERSONNEL QUALIFIED TO WORK WITH
ELECTRICITY AND GAS. IMPROPER INSTALLATION CAN CAUSE INJURY
TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT. THE UNIT MUST BE
INSTALLED IN ACCORDANCE WITH ALL APPLICABLE CODES.
CAUTION: THE APPLIANCE FLUE DISCHARGES VERTICALLY FROM THE TOP OF THE
UNIT AT THE REAR. IT MUST NOT BE DIRECTLY CONNECTED TO ANY FLUE,
MECHANICAL EXTRACTION SYSTEM, OR DUCTING LEADING OUTSIDE THE
BUILDING. THE APPLIANCE IS BEST DISCHARGED UNDER AN OPEN CANOPY
WHICH CONNECTS WITH A VENTILATING SYSTEM.
WARNING: THIS APPLIANCE MUST BE EARTHED.
UNLESS OTHERWISE STATED, PARTS WHICH HAVE BEEN PROTECTED BY THE
MANUFACTURER ARE NOT TO BE ADJUSTED BY THE INSTALLER.
Model DH/DHT-20 DH/DHT-40 DH/DHT-60
Width mm (inch) 890 (34.9) 1190 (46.8) 1190 (46.8)
Depth mm (inch) 790 (31.0) 930 (36.5) 990 (38.9)
Height mm (inch) 1040 (40.9) 1150 (45.2) 1240 (48.7)
Weight kg (lbs) 240 (530) 290 (640) 370 (810)
SITING
The appliance should be installed on a level floor in a well lit and draught free
position. The installation of the appliance must be executed in accordance with
local and/or national regulations as listed in this manual.
CLEARANCES
Minimum clearances of 150 mm (6 in) from the sides of the appliance and 250 mm
(10 in) from the rear of the appliance are required if the appliance is installed next
to combustible surfaces. A vertical clearance of 750 mm (30 in) minimum should
be allowed between the top rim of kettle and any overlying surface.
VENTILATION
The unit must be installed in an adequately ventilated room with a provision for
adequate air supply to the unit. The area directly around the appliance must be
cleared of all combustible material. For multiple installations, the requirements
for individual appliances should be added together. Installation should be made
in accordance with local and / or national regulations applying at the time. A
competent installer must be employed.
Recommendations for ventilation for catering appliances are given in BS 5440:2
and are shown in the table below.
Equipment (unit type) Ventilation Rate Required
m3/min ft3/ min
Range 17 600
Pastry Oven 17 600
Fryer 26 900
Grill 17 600
Steak Grill 26 900
Boiling Pan 17 600
Steamer 17 600
Sterilizing Sink 14 500
Bains Marie 11 400
Tea/Coffee Machine 8.5-14 300-500
ELECTRICAL SUPPLY
This unit is designed for connection to fixed wiring.A suitably rated isolating switch
with contact separation of at least 3 mm (0.12 in) on both poles must be fitted to
the installation and the wiring executed in accordance with the regulations listed
in this manual. Cable entry is at the lower rear on the right side of the appliance.
Access is gained by removing relevant panels as described in Servicing and
Conversion section. Provide 230 VAC, 50 Hz, 1 Phase, 1 AMP or 40 Watts service.
The electrical schematic is in the service compartment and this manual.
GAS SUPPLY
Incoming service must be of sufficient size to supply full rate without excessive
pressure drop. A gas meter is connected to the service pipe by the Gas Supplier.
Any existing meter should be checked by the Gas Supplier to ensure that it has
capacity to pass the required rate of gas for the kettle in addition to other installed
gas equipment.
The appliance governor is incorporated in the gas control valve which is in the
control cabinet. The control valve governor is suitable for both natural and propane
gases without conversion.
Installation pipe work should be fitted in accordance with IEGE/UP/2. The pipe
work should not be smaller than the gas inlet connection on the kettle, i.e. Rp ½
(½’’ B.S.P.)
An isolating cock must be located near the appliance to allow shut down during
emergency or servicing. Test for gas soundness and purged as specified in IGE/
UP/1.
Natural (G20) Models kW BTU/hr
DH-20 19.0 64,800
DH/1-40 26.4 89,900
DH-60 31.6 107,900
Propane (G31) Models kW BTU/hr
DH-20 19.4 66,200
DH/1-40 24.3 82,700
DH-60 32.3 110,300
Equipotential
Terminal
Electric Power
Supply Inlet
Gas Inlet
Water Level
Gauge &
Sight Glass
Gas and Electrical Connections are made at the rear of the unit.
Model # of Injectors Natural (G20) Propane (G31)
DH-20 15 1.10 mm 0.65 mm
DH/1-40 20 1.15 mm 0.65 mm
DH-60 25 1.10 mm 0.65 mm
NOTE: With reference to gas rate, pressure adjustments and conversions, this
appliance is CE-approved for use with the following gases:
1. G20 natural gas may be supplied to the appliance in Austria, Denmark, Finland,
Greece, Iceland, Ireland, Italy, Luxembourg, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.
2. G31 propane gas may be supplied to the appliance in Germany, Ireland, the
Netherlands, Portugal, Spain, Switzerland, and the United Kingdom.
Use of the appliance with non-approved gases in a listed country, or use in other
countries, will void CE certification.

5 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
A pressure test point is fitted on the burner manifold and on the gas control valve.
Natural (G20) Models mBar WCI (Water Column Inches)
DH-20 8.75 3.5
DH/1-40 8.75 3.5
DH-60 8.75 3.5
Propane (G31) Models mBar WCI (Water Column Inches)
DH-20 25 10.0
DH/1-40 25 10.0
DH-60 25 10.0
BURNER ADJUSTMENT
The burners are fixed aeration type and have no provision for adjustment of air inlet.
INITIAL START-UP
CAUTION: ENSURE THAT THE KETTLE CONTAINS LIQUID WHEN THE BURNERS ARE
ALIGHT.
WARNING: THIS APPLIANCE MUST BE EARTHED.
Water Level
Gauge &
Sight Glass
Pressure
Gauge
Gas Valve
Access Cover
GAS SUPPLY
Connect the unit to the gas supply and test for gas soundness. For gas supply
down stream of the gas valve, leak detection spray or soap solution may be used
with the burners lit.
ELECTRICAL SUPPLY
Before commissioning the appliance, ensure that the electrical installation has
been carried out to the relevant regulations (see Installation section).
JACKET WATER LEVEL/JACKET PRESSURE
Ensure the water level in the jacket is correct, by confirming that it is between
the sight glass marks. If it is low, follow instructions in Servicing and Conversion
section, Jacket Filling.
Check the pressure gauge. If it does not show 20 or more inches of vacuum (that
is, a reading of 20 to 30 below zero) see Servicing and Conversion section, Jacket
Vacuum.
PRE-COMMISSIONING CHECK
1. Prior to operation, clean out kettle thoroughly using hot water and detergent.
Rinse kettle thoroughly.
2. Remove all literature and packing materials from the interior and exterior of
the unit.
3. Ensure the open end or the elbow at the outlet of the safety valve is directed
down. If not, turn the elbow to the correct position. See detailed Instructions in
Servicing and Conversion section for Safety Valve installation and operation.
START-UP
Now that your kettle has been installed, you should test it to ensure that the unit
is operating correctly.
1.
Remove literature and packing materials from the interior and exterior of the unit.
2. Put a small amount of water into the kettle (6 to 13 mm). With the kettle in the
horizontal position, note how the water lies in the kettle, to confirm that the
pan was leveled properly during installation.
3. Following the “To Start Pan” instructions for your kettle model, begin heating
the water at a temperature setting of 235ºF (113ºC). At this setting, heating
should continue until the water boils.
4. To shut down the unit, switch the power switch to OFF.
5. Turn the tilting handwheel counterclockwise to pour out the water and to
confirm that the kettle body can be tilted smoothly from horizontal to vertical.
If the unit functions as described above, it is ready for use. If it does not, contact
your local Authorized Service Agency (Domestic) or Engineer (CE).
After installing and commissioning the appliance, the user’s instructions should be
handed to the user or purchaser. Ensure that the instructions for lighting, turning
off, correct use and cleaning are properly understood. The location of the main gas
isolating valve should be emphasized and the emergency shut down procedure
should be demonstrated.
SETTING THE GAS PRESSURE
Capscrew
for Governor
Pressure
Adjustment
Gas Inlet
1. It is necessary to check the gas pressure during commissioning. A pressure
gauge must be connected to the pressure test point on the gas manifold. See
above figure for test points.
2. Turn the main gas and electricity supply on.
3. Light the burners.
4. Remove cover plate on the round skirt at bottom of kettle.
5. Remove governor cap screw from control valve. See above figure for position
on valve.
6. Governor adjustment is suitable for both natural and propane gas.
7. To increase pressure turn the screw inside the governor turret clockwise;
anti-clockwise to reduce pressure. Check the burner pressure again after 15
minutes operation and adjust if necessary.
8. Disconnect the pressure gauge from the test point. Re-seal the pressure test
point and test for gas soundness.
9. Replace governor cap screw and replace cover plate.
CHECKING PERFORMANCE OF CONTROLS
1. Light the unit. Check that controls quickly and smoothly produce a healthy
spark from the electrode to the earthing post.
2. Turn controller off and then on. Check that burners go out and reignite smoothly
and quickly when switched back on. Repeat several times.
3. If the unit fails to respond as described, it should be serviced by an authorized
Groen service agent.

6 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
OPERATION
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
POSSIBLE.
4) STAND TO RIGHT OF KETTLE WHILE POURING — NOT DIRECTLY IN POUR PATH
OF HOT CONTENTS.
5) POUR SLOWLY, MAINTAINING CONTROL OF KETTLE, AND RETURN KETTLE
BODY TO UPRIGHT POSITION AFTER CONTAINER IS FILLED OR TRANSFER IS
COMPLETE.
6) DO NOT OVERFILL CONTAINER. AVOID SKIN CONTACT WITH HOT CONTAINER
AND ITS CONTENTS.
WARNING: AVOID ALL DIRECT CONTACT WITH HOT SURFACES AND HOT FOOD OR WATER IN
THE KETTLE. DIRECT CONTACT COULD RESULT IN SEVERE BURNS.
CAUTION: DO NOT TILT KETTLE WITH LIFT-OFF COVER IN PLACE. COVER MAY SLIDE OFF,
CAUSING INJURY TO OPERATOR.
CAUTION: DO NOT OVERFILL THE KETTLE WHEN COOKING, HOLDING OR CLEANING.
KEEP LIQUIDS AT LEAST 2-3” (5-8 CM) BELOW THE KETTLE RIM TO ALLOW
CLEARANCE FOR STIRRING, BOILING AND SAFE PRODUCT TRANSFER.
WARNING: AVOID ALL DIRECT CONTACT WITH HOT FOOD OR WATER IN THE KETTLE.
DIRECT CONTACT COULD RESULT IN SEVERE BURNS.
Classic Control
3.0
Advanced Control
CONTROLS - MODELS DH(T)-20, -40, -60, -80
1. The “Classic” Controls for the kettle are:
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. Crank tilt - a handle controls the worm and gear mechanism that smoothly
tilts the kettle body and holds it in the desired position.
2. The “Advanced” Controls for the kettle are:
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. Crank tilt - a handle controls the worm and gear mechanism that smoothly
tilts the kettle body and holds it in the desired position.
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

7 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
atmospheric pressure), see “Jacket Vacuum” in this manual.
c. Do not attempt to light any burner with a flame.
d. Turn the manual gas valve ON (align handle with gas line).
e. Turn rocker (on-off) switch ON. The electronic ignition will attempt to light
the pilot for 90 seconds, or until it is lit. Once lit proceed to step two.
f. Turn controller to desired setting. The main gas burner will ignite, and will
cycle to maintain the set temperature. The heat indicator light will come on.
g. If the unit does not light, turn it off and wait five minutes. Then follow the
instructions again.
2. To Empty Kettle Or To Transfer Product:
a. To tilt the body of the kettle forward, turn the hand crank on the front of the
cabinet counter-clockwise. The body will stay in the position it holds when
you stop cranking. To return the kettle body to its upright position, turn the
crank clockwise.
b. Product may also be transferred by means of the optional draw-off valve,
if the kettle is so equipped.
3. To Stop Kettle Heating:
a. Turn controller dial to OFF/ZERO.
b. Turn power switch to OFF.
c. For a prolonged shut-down:
1. Follow the procedure above.
2. Turn the manual gas valve off (handle at right angles to gas line).
3. Disconnect electric power from the unit.
4. To Relight Kettle
(a) Close main gas supply valve.
(b) Set on-off switch to OFF.
(c) Set controller dial to OFF.
(d) Wait five minutes, then proceed as directed under To Start Kettle
Heating.
5. If Power Fails:
(a) Do not attempt to operate the unit until electric power is restored.
(b) When power comes back on, follow directions “To Start Kettle,”
above.
USE OF COMMON ACCESSORIES
1. Lift-Off or Counterbalanced Cover:
As with stock pot cooking, an optional cover can speed up the heating of water
and food products. It helps retain heat and reduces the heat and humidity in
the kitchen. A cover can reduce some product cook times and help maintain
the temperature, color and texture of products held or simmered for longer
periods.
Be sure the handle is secure on the lift-off cover before using. ALWAYS use the
handle to place or remove cover from the kettle. Wear protective oven mitts
and apron.
When putting a lift-off cover on the kettle, position it on top of kettle rim, with
its flat edge facing the pouring lip.
When removing a lift-off cover:
a. Firmly grasp the handle, and lift the rear edge (farthest from operator) 1-2”
(3-5 cm) to allow steam and water vapor to escape. Wait 2-3 seconds.
b. Tilt cover to 45-60° angle to allow any hot condensate or product to roll off
cover back into kettle.
c. Remove cover, ensuring that remaining hot condensate or product does
not drip on operator, floor or work surfaces.
d. Place cover on safe, flat, sanitary, out-of-theway surface, or return to kettle.
2. Basket Insert:
An optional kettle basket insert set (Tri-BC) will assist in cooking water-boiled
products including eggs, potatoes, vegetables, shell fish, pasta and rice. The
nylon mesh liner must be used for products smaller than the basket mesh size,
(approx. ¼” (6 mm). This includes rice and small pasta shapes.
a. Allow for displacement of the three baskets and product. This may mean
only half filling the kettle. Test baskets and product displacement with the
kettle OFF, and with cold water in the kettle.
b. Load baskets on a level, stable work surface.
c. Lift loaded baskets with both hands. Get help from another person if the
basket is too heavy for safe handling.
d. Slowly lower product into kettle and securely hook basket to the “Y”
frame.
e. When removing baskets with cooked product, lift straight up, ensuring
basket bottoms clear the kettle rim and pouring lip. Wear protective oven
mitts and protective apron.
f. Allow hot water to fully drain from product, before moving basket away
from the kettle. Do not rest baskets on kettle rim or pouring lip. If baskets
are too heavy for individual to lift and safely move, get help. Remove
product immediately from basket into another container, being sure to
avoid contact with hot product and hot basket or...
g. Place baskets with food on a stable, flat surface, inside a solid steamer or
bake pan, to catch any remaining hot water draining from product.
CLEANING
WARNING: KEEP WATER AND SOLUTIONS AWAY FROM CONTROLS AND ELECTRICAL
EQUIPMENT. NEVER SPRAY THE SUPPORT HOUSING OR ELECTRICAL
CONNECTIONS.
CAUTION: MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS
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.
CAUTION: NEVER LEAVE A SANITIZER IN CONTACT WITH STAINLESS STEEL SURFACES
LONGER THAN 30 MINUTES. LONGER CONTACT CAN CAUSE CORROSION.
CAUTION: DO NOT MIX PARTS OF DIFFERENT DRAW OFF VALVE ASSEMBLIES. THE
PARTS ARE NOT INTERCHANGEABLE.
NOTICE: NEVER LEAVE A CHLORINE SANITIZER IN CONTACT WITH STAINLESS STEEL
SURFACES LONGER THAN 30 MINUTES. LONGER CONTACT CAN CAUSE
STAINING AND CORROSION.
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 controller dial and 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.

8 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
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. Model DHT only: Disassemble the tangent draw-off valve. Clean the draw-off
port and each valve part with a brush.
5. Rinse the kettle and draw-off valve parts thoroughly with hot water, then drain
completely.
6. When you reassemble the draw-off valve, hand-tighten the nut which holds it
in place.
7. 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.
8. 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.
9. The outside of the unit may be polished with a stainless steel cleaner such as
“Zepper” from Zep Manufacturing Co.
10. 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.
11. Following the supplier’s instructions, apply the agent after the unit has been
cleaned and drained. Rinse off the sanitizer thoroughly.
12. It is recommended that each piece of equipment be sanitized just before use.
13. If there is difficulty removing mineral deposits or a film left by hard water
or food residues, clean the kettle thoroughly and then use a deliming agent,
like Groen Delimer/Descaler (Part Number 114800), in accordance with the
manufacturer’s directions. Rinse and drain the unit before further use.
14. If cleaning problems persist, contact your cleaning product representative for
assistance. The supplier has a trained technical staff with laboratory facilities
to serve you.
MAINTENANCE
WARNING: WHEN TESTING, AVOID ANY EXPOSURE TO THE STEAM BLOWING OUT OF
THE SAFETY VALVE. DIRECT CONTACT COULD RESULT IN SEVERE BURNS.
WARNING: TO AVOID INJURY, READ AND FOLLOW ALL PRECAUTIONS 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 UNBURNED GAS TO VENT.
The pressure gauge should show a vacuum of
20 to 30 inches when the kettle is cold
Add grease through Zerk Fittings Liberally grease the wheel where
it contacts the worm gear
PERIODIC MAINTENANCE
NOTICE: Contact an authorized representative when repairs are required.
A service Log is provided at the back of this manual with the warranty information.
Each time maintenance is performed on your Groen 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:
1. Check the pressure/vacuum gauge every day. The gauge should show a
vacuum of 20 to 30 inches mercury (Hg), when the kettle is cold. If it does not,
see “Jacket Vacuum” in this manual.
2. Also check the jacket water level every day. It should be in the middle of the
sight glass. If the level is low, see “Jacket Filling and Water Treatment” in this
manual.
3. Carefully test the pressure relief valve at least twice each month. With the
kettle operating at five psi (105 kPa), pull the test lever and let it snap back
to its closed position. If there is little discharge (mostly air), and the pressure
gauge drops back to zero PSI, allow the pressure to build back to five PSI and
repeat the procedure. (Tip: Using a screwdriver or other implement to pull the
ring will help you avoid contact with the steam.)
4. If the valve does not activate, or there is no evidence of discharge, or the
valve leaks, stop using the kettle and contact a qualified Groen service
representative.
5. Keep the primary burner gas jet air inlets free of dust and lint.
6. The pilot flame should be blue. It should envelop about ½ inch (12 mm) of the
flame sensor tip.
7. The gear housing has fittings for lubrication of moving parts. The gears do not
run in oil, so periodic lubrication with grease is necessary.
8. Frequency of lubrication depends on operating conditions, but it should be
done at least once every six months.
9. Use a #2 grade LGI lithium grease to add grease through Zerk fittings on gear
housing until it flows out of the bearings around the trunnion shaft.
10. Place liberal amounts of grease on the gear to cover the arc that is in contact
with the worm gear.
11. Keep electrical wiring and connections in good condition.
12. Keep the inside of the control console clean and dry.
13. Keep burner slots clean.
Safety Valve Pressure Gauge Test the safety valve at least twice monthly
Check Valve Pipe Plug

9 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
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
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.
3. If there is little discharge (mostly air), and the pressure gauge drops back to
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.
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. Allow the kettle to cool completely. The procedure will be easier with the kettle
under vacuum (pressure gauge reading below zero).
2. Make sure the fill valve is closed, and remove the square head pipe plug with
open-ended wrench.
3. Position a funnel in the opening and fill it with properly treated water.
4. Slowly open the fill valve to allow water to be sucked into the jacket. Quickly
close the valve to prevent air from entering.
5. Check water level in the jacket to ensure that it is between minimum and
maximum marks on glass or at the top of the sight glass port for models DH/
DHT-80.
6. Close the valve and reinstall the squarehead pipe plug.
7. Reestablish the jacket vacuum as described above, if the pressure gauge does
not show a negative reading of 20 to 30 inches mercury (Hg).
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. Distilled
water is recommended.
Kettle Model Recommended Jacket Fill
DH-20, DHT-20 1-3/4 Gallons
DH/1-40, DHT/1-40 1-1/2 Gallons
DH-60, DHT-60 3 Gallons
DH-80, DHT-80 3 Gallons
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.
5. Stir the water continuously, while you slowly add treatment compound, until
the water has a pH between 10.5 and 11.5. Judge the pH by frequently
comparing the test strip color with the color chart provided in the test kit.
Caution: Do not add excess amount of treatment compound. Excess amount
could cause extensive corrosion.
6. As you add water to the jacket, check water level to ensure that it is between
minimum and maximum marks on glass or at the top of the sight glass port for
models DH/DHT-80. Stop adding water when it reaches the maximum marker
on the gauge.
7. Record the exact amounts of water and treatment compound needed. These
amounts may be used again, if the same water sources and compound are
used. However, it is best to check the pH each time treated water is prepared.
COMPONENT REPLACEMENT
When component replacement involves breaking a gas pipe connection, check the
new connection with soap solution or an appropriate leak detector. DO NOT USE A
FLAME TO TEST FOR LEAKS.
Internal wiring is marked as shown on the circuit schematic drawings (inside
control housing and in this manual). Be sure that new components are wired in the
same manner as old components. An examination of the circuit schematic shows
that the safety components are wired in series. In most cases, a faulty component
may be isolated with a jumper wire to verify that the component is faulty. If this
determination is made, contact a certified Groen Service Agency for assistance.
SEQUENCE OF OPERATION
The following “action-reaction” outline is provided to help understand how the
kettle works.
1. When the power switch is turned on, it starts the spark igniter and opens the
automatic valve for the pilot burner. The spark ignites a pilot flame, which
heats the sensor. The sensor then sends a signal to turn off the spark. The
flame thereafter acts as a standing pilot until the power is turned off.
2. If the pilot flame is not sensed within 90 seconds after spark begins, a timer
shuts down the entire operation. To attempt a second trial for ignition, turn
off the power switch. Check the gas supply valves and wait five minutes
before trying again by switching power on. If you cannot establish a pilot
flame in four tries, close all valves, turn off the power, and contact an
authorized Groen Service Agency.
3. When the operator sets a temperature on the controller, it causes the
automatic valve to admit gas to the main burner, where it is ignited by the
pilot flame. When the kettle reaches the set temperature, the controller
switch opens. This stops the signal to the gas control valve and shuts off
gas to the main burner. The pilot flame remains lit. When the kettle cools
below the set temperature, the controller switch closes and starts another
cycle. On and off cycling continues and maintains the kettle at the desired
temperature. This action is indicated by the Heat indicator light.
The kettle has the following safety features in addition to the 90-second ignition
timer:
1. Low water cutoff relay that will shut off gas supplies to all burners until the
jacket water level is corrected.
2. High limit pressure switch, set to open at about 46 PSI and to shut down the
burners until jacket pressure is decreased.
3. Pressure relief valve, which will release steam if jacket pressure exceeds 50
PSI.
4. Tilt switch, which shuts off all burners when the kettle is tilted.
5. Gas pressure regulator built into the gas control valve.

10 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
SERVICING & CONVERSION
IMPORTANT: BEFORE ATTEMPTING ANY SERVICING, ENSURE THAT THE ISOLATING
COCK IS TURNED OFF AND CANNOT BE INADVERTENTLY TURNED ON.
ENSURE ALSO THAT THE ELECTRICITY SUPPLY IS DISCONNECTED. AFTER
ANY MAINTENANCE TASK, CHECK THE APPLIANCE TO ENSURE THAT IT
PERFORMS CORRECTLY AND CARRY OUT ANY NECESSARY ADJUSTMENTS
AS DETAILED IN THIS MANUAL. ALWAYS CHECK FOR GAS SOUNDNESS
AFTER CARRYING OUT ANY SERVICING OR EXCHANGE OF GAS CARRYING
COMPONENTS.
NOTE: 1. WHEN REPLACING WIRING CONNECTIONS REFER TO THE WIRING
DIAGRAM CONTAINED ON THE UNIT AND WITHIN THIS MANUAL.
2. WHEN ANY THREADED GAS CONNECTION IS DISTURBED FOR ANY
REASON, THE THREADS MUST BE RESEALED WITH APPROPRIATE GAS
LEAK PREVENTION SEALANT THAT IS SUITABLE FOR THE TYPE OF GAS.
UNIFIED BRANDS/GROEN RECOMMENDS GAS SEALANT COMPOUND SUCH
AS LOCKTITE® 243 OR UNIFIED BRANDS PART NUMBER 122002.
WARNING: AVOID ANY EXPOSURE TO THE STEAM BLOWING OUT OF THE SAFETY
VALVE.
CAUTION: BEFORE TESTING, MAKE CERTAIN DISCHARGE PIPE IS PROPERLY
CONNECTED TO VALVE OUTLET AND ARRANGED TO CONTAIN AND SAFELY
DISPOSE OF BOILER DISCHARGE (SEE “INSTALLATION INSTRUCTIONS”).
AFTER SERVICING
1. Test for gas soundness as specified in IGE/UP1 as appropriate after any gas
connection has been disturbed.
2. If leaks are found, disconnect the mating parts, clean the threads and apply
recommended sealant as specified in Note 2 above. WARNING Do not leave
any wood splinter or bristles from brush in the burner or injector. Fire could
result.
3. Check for correct operation, as appropriate (see commissioning of
appliance).
REGULAR SERVICING PROCEDURES
The following must be serviced at regular intervals.
BURNERS
The burner should be cleaned periodically to maintain maximum performance.
Burners are best cleaned with a wire brush and any blocked parts are best
cleaned with a metal broach, taking care not to damage the burner head. The
injector orifice should be cleaned with a wooden splinter. Metal reamers may
distort or increase the orifice size and should be avoided. WARNING - Do not
leave any wood splinter or bristles from brush in the burner or injector. Fire
could result.
GEARS
The gear housing has fitting for proper lubrication of moving parts. The gears
do not run in oil, periodic lubrication with grease is necessary. Frequency of
lubrication will depend on operating conditions, but it should be performed at
least once every 6 months. It is recommended that a #2 grade LGI lithium grease
be used. Add grease through the Zerk fittings on the gear housing until grease
flows out of 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.
SAFETY VALVE (STEAM)
At least twice a month the safety valve requires checking to make sure it works
correctly. When the gauge pressure is about five PSI, lift the valve lever enough
to vent steam, then quickly let it snap back into place. This procedure should
be explained to the user, since it is to be carried out at least twice a month.
Safety procedures and requirements should also be explained to the user when
carrying out the procedure.
SAFETY VALVE OPERATING INSTRUCTIONS
If adding water to the boiling pan jacket, DO NOT ALLOW water to flow through
safety valve as sediment or debris may be deposited on seating surface. To
achieve topmost performance and maximum service life, it is necessary to
maintain a proper pressure margin between set pressure of the safety valve and
equipment operating pressure.
The minimum required pressure margin for this type of valve is 10% of the safety
relief valve set pressure, but not less than five PSI. UNDER NO CIRCUMSTANCES
SHOULD THIS MARGIN BE LESS THAN 5 PSI. Failure to maintain this operating
margin may result in water leakage past the seat and accumulation of deposits
on the seating surface. Excessive deposits may prevent the valve from operating
properly, and a dangerous pressure build-up and equipment rupture may result.
MAINTENANCE AND TESTING
OM-SM-DH-CE
11
OM/SM-DH-CE
Test the operation of the safety valve on a
regular basis.
The minimum required pressure margin for this
type of valve is 10% of the safety relief valve set
pressure, but not less than five PSI. UNDER NO
CIRCUMSTANCES SHOULD THIS MARGIN
BE LESS THAN 5 PSI.Failure to maintain this
operating margin may result in water leakage
past the seat and accumulation of deposits on
the seating surface. Excessive deposits may
prevent the valve from operating properly, and a
dangerous pressure build-up and equipment
rupture may result.
Maintenance and Testing
CAUTION
BEFORE TESTING, MAKE CERTAIN
DISCHARGE PIPE IS PROPERLY
CONNECTED TO VALVE OUTLET AND
ARRANGED TO CONTAIN AND SAFELY
DISPOSE OF BOILERDISCHARGE (SEE
“INSTALLATION INSTRUCTIONS”).
Under normal operating conditions a “try lever
test” must be performed every two months.
Under severe service conditions, or if corrosion
and/or deposits are noticed within the valve
body, testing must be performed more often. A
“try lever test” must also be performed at the end
of any non-service period.
Test at or near maximum operating pressure by
holding the test lever fully open for at least 5
seconds to flush the valve seat free of sediment
and debris. Then release lever and permit the
valve to snap shut.
If lift lever does not activate, or there is no
evidence of discharge, discontinue use of
equipment immediately and contact a licensed
contractor or qualified service personnel.
Neither Conbraco Industries, Inc. nor its agents
assume any liability for valves improperly
installed or maintained.
This quality Conbraco safety relief valve, along
with proper installation, use, and maintenance,
will provide many years of reliable service and
protection against excessive pressure build-up of
water/steam. Use of this valve for any other
purpose or media places all responsibility upon
the user. Before installing valve or operating
equipment to which it is installed, read
instructions carefully. Always wear proper safety
equipment.
INSTALLATION OF SAFETY VALVE (STEAM)
a) Installation must be performed by qualified
service personnel only.
b) The BTU/hr or lb/hr rating of this valve must
equal or exceed that of the equipment to
which it is attached.
c) DO NOT use this valve on a coal or wood
boiler having an uncontrolled heat input.
d) Ensure that all connections, including the
valve inlet, are clean and free from any
foreign material.
e) Use pipe compound sparingly, or tape, on
external threads only.
f) DO NOT USE A PIPE WRENCH!Use
proper type and size wrench on wrench pads
only.
g) This valve must be mounted in a vertical,
upright position directly to a clean, tapped
opening in the top of the boiler or equipment.
Under no circumstances should there be a
flow restriction or valve of any type between
the safety relief valve and the pressure
vessel
h) WARNING! During operation, this valve
may discharge large amounts of steam
and/or hot water. To reduce the potential for
bodily injury and property damage, a
discharge line MUST be installed that:
Test the operation of the safety valve on a regular basis.
Under normal operating conditions a “try lever test” must be performed every
two months. Under severe service conditions, or if corrosion and/or deposits are
noticed within the valve body, testing must be performed more often. A “try lever
test” must also be performed at the end of any non-service period.
Test at or near maximum operating pressure by holding the test lever fully open
for at least 5 seconds to flush the valve seat free of sediment and debris. Then
release lever and permit the valve to snap shut.
If lift lever does not activate, or there is no evidence of discharge, discontinue
use of equipment immediately and contact a licensed contractor or qualified
service personnel.
Neither Conbraco Industries, Inc. nor its agents assume any liability for valves
improperly installed or maintained.
This quality Conbraco safety relief valve, along with proper installation, use,
and maintenance, will provide many years of reliable service and protection
against excessive pressure build-up of water/steam. Use of this valve for any
other purpose or media places all responsibility upon the user. Before installing
valve or operating equipment to which it is installed, read instructions carefully.
Always wear proper safety equipment.
INSTALLATION OF SAFETY VALVE (STEAM)
1. Installation must be performed by qualified service personnel only.
2. The BTU/hr or lb/hr rating of this valve must equal or exceed that of the
equipment to which it is attached.
3. DO NOT use this valve on a coal or wood boiler having an uncontrolled heat
input.
4. Ensure that all connections, including the valve inlet, are clean and free from
any foreign material.
5. Use pipe compound sparingly, or tape, on external threads only.
6. DO NOT USE A PIPE WRENCH! Use proper type and size wrench on wrench
pads only.
7. This valve must be mounted in a vertical, upright position directly to
a clean, tapped opening in the top of the boiler or equipment. Under no
circumstances should there be a low restriction or valve of any type between
the safety relief valve and the pressure vessel
8. WARNING! During operation, this valve may discharge large amounts of
steam and/or hot water. To reduce the potential for bodily injury and property
damage, a discharge line MUST be installed that:

11 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
a. is connected from the valve outlet with no intervening valve and directed
downward to a safe point of discharge.
b. allows complete drainage of both the valve and the discharge line
c. is independently supported and securely anchored so as to avoid applied
stress on the valve.
d. is as short and straight as possible.
e. terminates freely to atmosphere where any discharge will be clearly
visible and is at no risk of freezing.
f. terminates with a plain end that is not threaded.
g. is constructed of a material suitable for exposure to temperatures of
375ºF or greater.
h. is, over its entire length, of a size equal to or greater than the valve
outlet.
Use only schedule 40 pipe for discharge. (Do not use schedule 80, extra strong
pipe or connections). DO NOT CAP, PLUG, OR OTHERWISE OBSTRUCT DISCHARGE
PIPE OUTLET!
9. See appropriate ASME Boiler and Pressure Vessel Code for additional
installation instructions.
CONVERSION
ALL CONVERSIONS MUST BE FOR APPROVED GAS IN THE COUNTRIES LISTED IN THIS MANUAL.
IMPORTANT: T
HIS APPLIANCE WAS FITTED AT THE FACTORY WITH GAS INJECTORS FOR
TYPE OF GAS SPECIFIED ON DATA PLATE. PRIOR TO INSTALLING EQUIPMENT,
OR WHEN CONVERTING TO ANOTHER GAS, VERIFY THAT THE INJECTOR SIZE
MARKING ON THE GAS INJECTOR MATCHES THE INFORMATION ON THE
DATA PLATE FOR THE TYPE OF GAS BEING USED.
See previous content for important information for gas conversion. Verify the
type of gas to be used. To change the type of gas used (e.g. G20 to G31, natural
gas to propane, or inverse) change the following:
1. Burner injectors. See instruction in this manual.
2. Gas valve spring. Install per instructions supplied with the spring package as
shown below.
3. Pilot orifice. The pilot orifice for correct gas must be used. See photo below.
a. Remove the gas line and the connector to the pilot.
b. Remove natural gas/G20 orifice from the pilot. It is marked BCR18.
c. Insert propane/G31 orifice marked BBR14.
d. Reconnect pilot gas line.
4. Data plate with correct rate and gas manifold pressure information.
OM-SM-DH-CE
OM/SM-DH-CE
1. is connected from the valve outlet with
no intervening valve and directed
downward to a safe point of discharge.
2. allows complete drainage of both the
valve and the discharge line
3. is independently supported and securely
anchored so as to avoid applied stress
on the valve.
4. is as short and straight as possible.
5. terminates freely to atmosphere where
any discharge will be clearly visible and
is at no risk of freezing.
6. terminates with a plain end that is not
threaded.
7. is constructed of a material suitable for
exposure to temperatures of 375º F or
greater.
8. is, over its entire length, of a size equal
to or greater than the valve outlet.
Use only schedule 40 pipe for discharge.
(Do not use schedule 80, extra strong pipe
or connections). DO NOT CAP, PLUG, OR
OTHERWISE OBSTRUCT DISCHARGE
PIPE OUTLET!
I) See appropriate ASME Boiler and Pressure
Vessel Code for additional installation
instructions.
3.1 Conversion
See Paragraphs 1.8 and 1.9 for important
information for gas conversion. Verify the
type of gas to be used.
To change the type of gas used (e.g. G20 to
G31 or inverse) change the following:
a) Burner injectors. See instruction 3.15 on page 16.
b) Gas valve spring. Install per instructions supplied
with the spring package as shown below.
3. Insert G31 orifice marked BBR14.
4. Reconnect pilot gas line.
d) Data plate with correct rate and gas manifold
pressure information.
ALL CONVERSIONS MUST BE FOR
APPROVED GAS IN THE COUNTRIESLISTED
IN PARAGRAPH 1.9.
c) Pilot orifice. The pilot orifice for correct gas must
be used. See photo below.
1. Remove the gas line and the connector
to the pilot.
2. Remove G20 orifice from the pilot.
It is marked BCR18.
IMPORTANT
THIS APPLIANCE WAS FITTED AT THE
FACTORY WITH GAS INJECTORS FOR TYPE
OF GAS SPECIFIED ON DATA PLATE. PRIOR
TO INSTALLING EQUIPMENT, OR WHEN
CONVERTING TO ANOTHER GAS, VERIFY THAT
THE INJECTOR SIZE MARKING ON THE GAS
INJECTOR MATCHES THE INFORMATION ON
THE DATA PLATE FOR THE TYPE OF GAS
BEING USED.
3.2 Jacket Vacuum
When the kettle is cold, a positive reading or a
reading around zero on the pressure vacuum
gauge indicates an excess of air in the jacket. Air
in the jacket slows down kettle heating.
To remove air:
a) Light the unit. (Paragraph 2.5.1 )
b) When the pressure/vacuum gauge reaches
a positive pressure reading of 5 PSI, release
air and steam by lifting the lever on the
safety valve for about one second. Repeat
this a few times. Then let the lever snap
back to the closed position.
See detailed Instructions on Page 11 pertaining
to Safety Valve installation and operation.
WARNING
AVOID EXPOSURE TO
STEAM BLOWING
OUT OF THE SAFETY
VALVE.
3.3 JacketFilling
(TURN OFF GAS AND ELECTRICITY MAINS)
The jacket has been charged at the factory with
the proper amount of treated, distilled water. You
may need to restore jacket water to its proper
level, either because it was lost as steam during
venting or by draining.
OM-SM-DH-CE
OM/SM-DH-CE
1. is connected from the valve outlet with
no intervening valve and directed
downward to a safe point of discharge.
2. allows complete drainage of both the
valve and the discharge line
3. is independently supported and securely
anchored so as to avoid applied stress
on the valve.
4. is as short and straight as possible.
5. terminates freely to atmosphere where
any discharge will be clearly visible and
is at no risk of freezing.
6. terminates with a plain end that is not
threaded.
7. is constructed of a material suitable for
exposure to temperatures of 375º F or
greater.
8. is, over its entire length, of a size equal
to or greater than the valve outlet.
Use only schedule 40 pipe for discharge.
(Do not use schedule 80, extra strong pipe
or connections). DO NOT CAP, PLUG, OR
OTHERWISE OBSTRUCT DISCHARGE
PIPE OUTLET!
I) See appropriate ASME Boiler and Pressure
Vessel Code for additional installation
instructions.
3.1 Conversion
See Paragraphs 1.8 and 1.9 for important
information for gas conversion. Verify the
type of gas to be used.
To change the type of gas used (e.g. G20 to
G31 or inverse) change the following:
a) Burner injectors. See instruction 3.15 on page 16.
b) Gas valve spring. Install per instructions supplied
with the spring package as shown below.
3. Insert G31 orifice marked BBR14.
4. Reconnect pilot gas line.
d) Data plate with correct rate and gas manifold
pressure information.
ALL CONVERSIONS MUST BE FOR
APPROVED GAS IN THE COUNTRIESLISTED
IN PARAGRAPH 1.9.
c) Pilot orifice. The pilot orifice for correct gas must
be used. See photo below.
1. Remove the gas line and the connector
to the pilot.
2. Remove G20 orifice from the pilot.
It is marked BCR18.
IMPORTANT
THIS APPLIANCE WAS FITTED AT THE
FACTORY WITH GAS INJECTORS FOR TYPE
OF GAS SPECIFIED ON DATA PLATE. PRIOR
TO INSTALLING EQUIPMENT, OR WHEN
CONVERTING TO ANOTHER GAS, VERIFY THAT
THE INJECTOR SIZE MARKING ON THE GAS
INJECTOR MATCHES THE INFORMATION ON
THE DATA PLATE FOR THE TYPE OF GAS
BEING USED.
3.2 Jacket Vacuum
When the kettle is cold, a positive reading or a
reading around zero on the pressure vacuum
gauge indicates an excess of air in the jacket. Air
in the jacket slows down kettle heating.
To remove air:
a) Light the unit. (Paragraph 2.5.1 )
b) When the pressure/vacuum gauge reaches
a positive pressure reading of 5 PSI, release
air and steam by lifting the lever on the
safety valve for about one second. Repeat
this a few times. Then let the lever snap
back to the closed position.
See detailed Instructions on Page 11 pertaining
to Safety Valve installation and operation.
WARNING
AVOID EXPOSURE TO
STEAM BLOWING
OUT OF THE SAFETY
VALVE.
3.3 JacketFilling
(TURN OFF GAS AND ELECTRICITY MAINS)
The jacket has been charged at the factory with
the proper amount of treated, distilled water. You
may need to restore jacket water to its proper
level, either because it was lost as steam during
venting or by draining.
Pilot
Gas Inlet Tube Connector
Natural Gas/G20 Orifice
BCR18
Propane/G31 Orifice
BCR14
JACKET VACUUM
WARNING: AVOID EXPOSURE TO STEAM BLOWING OUT OF THE SAFETY VALVE.
When the kettle is cold, a positive reading or a reading around zero on the
pressure vacuum gauge indicates an excess of air in the jacket. Air in the jacket
slows down kettle heating.
To remove air:
1. Light the unit.
2. When the pressure/vacuum gauge reaches a positive pressure reading of 5
PSI, release air and steam by lifting the lever on the safety valve for about
one second. Repeat this a few times. Then let the lever snap back to the
closed position.
See detailed Instructions in this section pertaining to Safety Valve installation
and operation.
JACKET FILLING
WARNING: TURN OFF GAS AND ELECTRICITY MAINS
OM-SM-DH-CE
11
OM/SM-DH-CE
Test the operation of the safety valve on a
regular basis.
The minimum required pressure margin for this
type of valve is 10% of the safety relief valve set
pressure, but not less than five PSI. UNDER NO
CIRCUMSTANCES SHOULD THIS MARGIN
BE LESS THAN 5 PSI.Failure to maintain this
operating margin may result in water leakage
past the seat and accumulation of deposits on
the seating surface. Excessive deposits may
prevent the valve from operating properly, and a
dangerous pressure build-up and equipment
rupture may result.
Maintenance and Testing
CAUTION
BEFORE TESTING, MAKE CERTAIN
DISCHARGE PIPE IS PROPERLY
CONNECTED TO VALVE OUTLET AND
ARRANGED TO CONTAIN AND SAFELY
DISPOSE OF BOILERDISCHARGE (SEE
“INSTALLATION INSTRUCTIONS”).
Under normal operating conditions a “try lever
test” must be performed every two months.
Under severe service conditions, or if corrosion
and/or deposits are noticed within the valve
body, testing must be performed more often. A
“try lever test” must also be performed at the end
of any non-service period.
Test at or near maximum operating pressure by
holding the test lever fully open for at least 5
seconds to flush the valve seat free of sediment
and debris. Then release lever and permit the
valve to snap shut.
If lift lever does not activate, or there is no
evidence of discharge, discontinue use of
equipment immediately and contact a licensed
contractor or qualified service personnel.
Neither Conbraco Industries, Inc. nor its agents
assume any liability for valves improperly
installed or maintained.
This quality Conbraco safety relief valve, along
with proper installation, use, and maintenance,
will provide many years of reliable service and
protection against excessive pressure build-up of
water/steam. Use of this valve for any other
purpose or media places all responsibility upon
the user. Before installing valve or operating
equipment to which it is installed, read
instructions carefully. Always wear proper safety
equipment.
INSTALLATION OF SAFETY VALVE (STEAM)
a) Installation must be performed by qualified
service personnel only.
b) The BTU/hr or lb/hr rating of this valve must
equal or exceed that of the equipment to
which it is attached.
c) DO NOT use this valve on a coal or wood
boiler having an uncontrolled heat input.
d) Ensure that all connections, including the
valve inlet, are clean and free from any
foreign material.
e) Use pipe compound sparingly, or tape, on
external threads only.
f) DO NOT USE A PIPE WRENCH!Use
proper type and size wrench on wrench pads
only.
g) This valve must be mounted in a vertical,
upright position directly to a clean, tapped
opening in the top of the boiler or equipment.
Under no circumstances should there be a
flow restriction or valve of any type between
the safety relief valve and the pressure
vessel
h) WARNING! During operation, this valve
may discharge large amounts of steam
and/or hot water. To reduce the potential for
bodily injury and property damage, a
discharge line MUST be installed that:
The jacket has been charged at the factory with the proper amount of treated,
distilled water. You may need to restore jacket water to its proper level, either
because it was lost as steam during venting or by draining.
The procedure for adding water follows:
1. 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 below.
2. Allow the kettle to cool completely. Using the proper size spanner, remove
the pipe plug from above the globe valve.
3. Open the globe valve and pour distilled or treated water into the pipe plug
orifice. Hold the safety valve open while you pour to let air escape from the
jacket.
4. Air introduced to the jacket during the filling operation must be removed to
obtain efficient heating. See Jacket Vacuum.
See detailed Instructions in this section pertaining to Safety Valve installation
and operation.
WATER TREATMENT PROCEDURE
WARNING: READ AND FOLLOW WATER TREATMENT COMPOUND LABEL PRECAUTIONS TO AVOID
INJURY.
1. Fill the mixing container with the measured amount of water required. (See
Table). Use distilled water only.
Model Kettle Capacity Jacket Capacity
DH-20 20 Gal (75.7 L) 1.75 Gal (6.6 L)
DH-40 40 Gal (151.4 L) 1.88 Gal (7.1 L)
DH-60 60 Gal (227.1 L) 3.0 Gal (11.3 L)
DH-80 80 Gal (302.8 L) 3.0 Gal (11.3 L)
2. Hang a strip of pH test paper on the rim of the container, with about 1” of the
strip below the surface of the water.
3. Measure the water treatment compound you will be using. (One way to do
this is to add the compound to the water from a small measuring cup).

12 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
4. Stir the water continuously, while you slowly add water treatment compound,
until the water reaches a pH between 10.5 and 11.5. Judge the pH by
frequently comparing the color of the test strip with the color chart provided
in the pH test kit.
5. Record the exact amounts of water and treatment compound used. These
amounts may be used again, if the same sources of water and compound
are employed. However, it is advisable to check the pH every time water is
prepared. For optimum performance, use correctly treated, distilled water.
CONTROL PANELS
Control Cabinet Side Panel
1. Remove the 14 screws securing the side panel to the control cabinet.
2. Remove panel.
3. Replace in reverse order.
Supporting Column Access Panels
1. Remove the four screws securing the two panels to the supporting column.
2. Remove both panels.
3. Replace in reverse order.
REMOVAL OF SPARK IGNITION MODULE (TURN THE GAS & ELECTRICITY
MAINS OFF)
14
OM/SM-DH-CE
3.6 Removal of Spark Ignition Module (Turn
the gas and electricity mains off)
a) Remove supporting column (trunnion arm)
access panels (Paragraph 3.5.3).
b) Remove screws on ignition module box and
remove cover carefully so as not to damage
the water gasket.
c) Disconnect electrical leads from spark
ignition module.
d) Remove retaining screws securing module.
e) Withdraw spark ignition module from control
cabinet.
f) Replace in reverse order.
g) NOTE : When replacing spark ignition module,
verify that the high voltage cable to the pilot is
not damaged or frayed. If damaged, replace the
cable and route it the same as original placement.
3.7 Removal of Low Water Level Control,
Transformer or Fuse Replacement (Turn
the gas and electricity mains off)
a) Remove control cabinet lid (Para 3.5.1).
b) Remove control cabinet side panel as in
Para 3.5.2.
c) Remove low water level control transformer
or the fuse.
d)
e)
Replace in reverse order.
Ensure the low water level control relay is
correctly oriented when re-positioned.
3.8 Removal of Tilt Switch (Turn the gas and
electricity mains off)
a) Remove control cabinet lid (Para 3.5.1).
b) Remove control cabinet side panel (Para 3.5.2).
c) Disconnect electrical leads from tilt switch.
d) Remove screws securing the tilt switch.
e) Withdraw tilt switch from control cabinet.
f) Replace in reverse order.
g) Verify that the tilt switch shuts off the burner
gas supply when the kettle is tilted.
Adjustment range is 5° to 10°.
3.9 Removal of Gas Control Valve (Turn the
gas and electricity mains off)
a) Remove panel from kettle base by removing the
three (3) retaining screws (see photo below).
b) Undo the gas line fittings on inlet and outlet
side of gas valve.
c) Disconnect the electrical leads from the gas valve.
d) Remove the fasteners holding the gas bracket to
the kettle body.
e) Carefully tilt the gas valve assembly to access
the pilot gas connection.
f) Undo the pilot gas tube connection.
g) Remove the gas valve from kettle.
h) Replace in reverse order.
Spark Ignition
Control Module
(CE Shown)
Module Box
Trunnion Arm
1. Remove supporting column (trunnion arm) access panels.
2. Remove screws on ignition module box and remove cover carefully so as not
to damage the water gasket.
3. Disconnect electrical leads from spark ignition module.
14
OM/SM-DH-CE
3.6 Removal of Spark Ignition Module (Turn
the gas and electricity mains off)
a) Remove supporting column (trunnion arm)
access panels (Paragraph 3.5.3).
b) Remove screws on ignition module box and
remove cover carefully so as not to damage
the water gasket.
c) Disconnect electrical leads from spark
ignition module.
d) Remove retaining screws securing module.
e) Withdraw spark ignition module from control
cabinet.
f) Replace in reverse order.
g) NOTE : When replacing spark ignition module,
verify that the high voltage cable to the pilot is
not damaged or frayed. If damaged, replace the
cable and route it the same as original placement.
3.7 Removal of Low Water Level Control,
Transformer or Fuse Replacement (Turn
the gas and electricity mains off)
a) Remove control cabinet lid (Para 3.5.1).
b) Remove control cabinet side panel as in
Para 3.5.2.
c) Remove low water level control transformer
or the fuse.
d)
e)
Replace in reverse order.
Ensure the low water level control relay is
correctly oriented when re-positioned.
3.8 Removal of Tilt Switch (Turn the gas and
electricity mains off)
a) Remove control cabinet lid (Para 3.5.1).
b) Remove control cabinet side panel (Para 3.5.2).
c) Disconnect electrical leads from tilt switch.
d) Remove screws securing the tilt switch.
e) Withdraw tilt switch from control cabinet.
f) Replace in reverse order.
g) Verify that the tilt switch shuts off the burner
gas supply when the kettle is tilted.
Adjustment range is 5° to 10°.
3.9 Removal of Gas Control Valve (Turn the
gas and electricity mains off)
a) Remove panel from kettle base by removing the
three (3) retaining screws (see photo below).
b) Undo the gas line fittings on inlet and outlet
side of gas valve.
c) Disconnect the electrical leads from the gas valve.
d) Remove the fasteners holding the gas bracket to
the kettle body.
e) Carefully tilt the gas valve assembly to access
the pilot gas connection.
f) Undo the pilot gas tube connection.
g) Remove the gas valve from kettle.
h) Replace in reverse order.
Tilt Switch
Low Water Level Control
Terminal Block
Fuse
Transformer
4. Remove retaining screws securing module.
5. Withdraw spark ignition module from control cabinet.
6. Replace in reverse order.
7. NOTE : When replacing spark ignition module, verify that the high voltage
cable to the pilot is not damaged or frayed. If damaged, replace the cable
and route it the same as original placement.
REMOVAL OF LOW WATER LEVEL CONTROL, TRANSFORMER OR FUSE
REPLACEMENT (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove control cabinet side panel.
2. Remove low water level control transformer or the fuse.
3. Replace in reverse order.
4. Ensure the low water level control relay is correctly oriented when re-
positioned.
REMOVAL OF TILT SWITCH (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove control cabinet lid.
2. Remove control cabinet side panel.
3. Disconnect electrical leads from tilt switch.
4. Remove screws securing the tilt switch.
5. Withdraw tilt switch from control cabinet.
6. Replace in reverse order.
7. Verify that the tilt switch shuts off the burner gas supply when the kettle is
tilted. Adjustment range is 5° to 10°.
REMOVAL OF GAS CONTROL VALVE (TURN THE GAS & ELECTRICITY MAINS
OFF)
1. Remove panel from kettle base by removing the three (3) retaining screws
(see photo below).
2. Undo the gas line fittings on inlet and outlet side of gas valve.
3. Disconnect the electrical leads from the gas valve.
4. Remove the fasteners holding the gas bracket to the kettle body.
5. Carefully tilt the gas valve assembly to access the pilot gas connection.
6. Undo the pilot gas tube connection.
7. Remove the gas valve from kettle.
8. Replace in reverse order.
Water Splash Guard
Kettle Bottom Cover
Pilot Gas Line
Gas Line
Valve Support Bracket
Gas Valve
Flexible Gas Connector
REMOVAL OF ON/OFF SWITCH (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove control cabinet side panel.
2. Disconnect electrical leads from the On/Off switch.
3. Withdraw the On/Off switch.
4. Replace in reverse order.
REMOVAL OF ON/OFF SWITCH (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove control cabinet side panel.
2. Disconnect electrical leads from the On/Off switch.

13 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
3. Withdraw the On/Off switch.
4. Replace in reverse order.
REMOVAL OF LAMPS
Turn gas and electricity mains off
1. Remove cabinet side panel as described in REMOVAL OF CONTROL CABINET
PANELS.
2. Disconnect the lamps flying leads.
3. Undo and remove the retaining collar.
4. Remove the 2 nuts retaining the light mount and spacer.
5. Withdraw the lamp from the control compartment.
6. Replace in reverse order.
REMOVAL OF CLASSIC/ADVANCED CONTROLLER
Turn gas and electricity mains off
To Replace:
1. Remove cabinet side panels as described in REMOVAL OF CONTROL
CABINET PANELS.
2. Remove 4 nuts retaining controller.
3. Remove electrical leads from controller.
4. Loose control dial set screw and remove dial.
5. Remove controller.
6. Replace in reverse order.
To Calibrate: (classic controls only, if required)
1. Fill the pan with unused oil to the indicated mark. Place a thermocouple 25
mm below the oil surface in the middle of the pan.
2. Light the unit and allow the oil to heat.
3. Temperature should settle at 374ºF(±9ºF), 190ºC (±5ºC). If adjustment is
required, disconnect main power. Adjustment is located on the back of the
control board. Turn adjustment counter-clockwise to increase temperature
and clockwise to decrease.
REMOVAL OF PRESSURE SWITCH (TURN THE GAS & ELECTRICITY MAINS OFF)
Water Level
Sensor
Pressure Switch
1. Remove panel from base of kettle by undoing the retaining screws.
2. Disconnect the electrical leads from the pressure switch.
3. Drain kettle by tilting kettle slightly and undoing the compression fitting at
the pressure switch. Allow kettle to drain into a suitably sized container.
4. Remove and withdraw the pressure switch from the kettle base by undoing
the compression fitting.
5. Replace in reverse order.
6. Once the pressure switch is in place, the kettle jacket should be refilled.
Always refer to wiring diagram when reconnecting electrical leads.
REMOVAL OF LOW WATER LEVEL SENSOR (TURN GAS & ELECTRICITY MAINS
OFF)
1. Remove panel from base of kettle by undoing the retaining screws.
2. Disconnect the electrical leads from the water sensor.
3. Drain the kettle by tilting it slightly and undoing the low water level sensor.
Allow the kettle to drain into a suitably sized container.
4. Remove the low water sensor from the kettle base.
5. Replace in reverse order.
6. Ensure a suitable sealant is used to seal the low water level sensor Boss.
7. When the low water level sensor is in place, the jacket should be filled.
REMOVAL OF BURNERS (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove water splash guards around the burner.
2. Undo compression fitting at gas pipe to burner manifold and to the pilot.
3. Disconnect electrical leads to the pilot.
4. Remove the four retaining nuts securing the burner and igniter assembly
to the combustion chamber. Carefully support the weight of the burner
manifold and lower the assembly to a safe position.
5. The burners are now accessible and can be removed as required. Ensure
adequate sealant is used to seal the burners.
6. Replace in reverse order. Always check for gas soundness when any part of
the gas circuit has been disturbed.
REMOVAL OF PILOT (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove water splash guards around the burner.
2. Disconnect the high voltage spark cable from the pilot.
3. Disconnect the ground connection cable from the pilot mounting screw.
4. Remove the second pilot mounting screw.
5. Remove pilot assembly and install new pilot.
6. Replace in reverse order.
7. Ensure that there is an adequate spark at the sparking electrode and that
the burners light smoothly and without delay.
8. As the burners ignite, ensure that the sparking sequence stops and that the
burners remain lit.
High Voltage
Spark Cable Pilot
Ground
Connector
Burner
Gas LineGas Line
OM-SM-DH-CE
17
OM/SM-DH-CE
Recommended spacings are shown in this drawing.
DH-20 shown
g) Ensure that there is an adequate spark at
the sparking electrode and that the burners
light smoothly and without delay.
h) As the burners ignite, ensure that the
sparking sequence stops and that the
burners remain lit.
3.17 Removal of Pressure Gauge (Turn the
gas and electricity mains off)
a) Using the correctly sized spanner remove
the pressure gauge from top of the sight
glass.
b) Replace with new pressure gauge ensuring
that an adequate sealing compound is used.
c) Once the pressure gauge has been
replaced, the kettle jacket will require
venting. (Para 3.2)
3.18 Removal of Sight Glass (Turn the gas
and electricity mains off)
a) Remove sight glass protection bars.
b) Undo top and bottom compression fittings.
c) Allow the water in the sight glass to drain.
d) Remove the sight glass.
e) Replace in reverse order.
15 mm
13 mm
OM-SM-DH-CE
17
OM/SM-DH-CE
Recommended spacings are shown in this drawing.
DH-20 shown
g) Ensure that there is an adequate spark at
the sparking electrode and that the burners
light smoothly and without delay.
h) As the burners ignite, ensure that the
sparking sequence stops and that the
burners remain lit.
3.17 Removal of Pressure Gauge (Turn the
gas and electricity mains off)
a) Using the correctly sized spanner remove
the pressure gauge from top of the sight
glass.
b) Replace with new pressure gauge ensuring
that an adequate sealing compound is used.
c) Once the pressure gauge has been
replaced, the kettle jacket will require
venting. (Para 3.2)
3.18 Removal of Sight Glass (Turn the gas
and electricity mains off)
a) Remove sight glass protection bars.
b) Undo top and bottom compression fittings.
c) Allow the water in the sight glass to drain.
d) Remove the sight glass.
e) Replace in reverse order.
15 mm
13 mm
Recommended spacings are shown in the above drawing.
REMOVAL OF PRESSURE GAUGE (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Using the correctly sized spanner remove the pressure gauge from top of the
sight glass.

14 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
2. Replace with new pressure gauge ensuring that an adequate sealing
compound is used.
3. Once the pressure gauge has been replaced, the kettle jacket will require
venting.
OM-SM-DH-CE
17
OM/SM-DH-CE
Recommended spacings are shown in this drawing.
DH-20 shown
g) Ensure that there is an adequate spark at
the sparking electrode and that the burners
light smoothly and without delay.
h) As the burners ignite, ensure that the
sparking sequence stops and that the
burners remain lit.
3.17 Removal of Pressure Gauge (Turn the
gas and electricity mains off)
a) Using the correctly sized spanner remove
the pressure gauge from top of the sight
glass.
b) Replace with new pressure gauge ensuring
that an adequate sealing compound is used.
c) Once the pressure gauge has been
replaced, the kettle jacket will require
venting. (Para 3.2)
3.18 Removal of Sight Glass (Turn the gas
and electricity mains off)
a) Remove sight glass protection bars.
b) Undo top and bottom compression fittings.
c) Allow the water in the sight glass to drain.
d) Remove the sight glass.
e) Replace in reverse order.
15 mm
13 mm
REMOVAL OF SIGHT GLASS (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove sight glass protection bars.
2. Undo top and bottom compression fittings.
3. Allow the water in the sight glass to drain.
4. Remove the sight glass.
5. Replace in reverse order.
6. Once the sight glass has been replaced, the lost jacket water requires
replacement.
REMOVAL OF STEAM SAFETY VALVE (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove the elbow from the safety valve.
2. Remove the steam safety valve from kettle jacket pipework.
3. Replace in reverse order.
4. Ensure an adequate sealing compound is used to seal the safety valve.
5. Once the steam safety valve has been replaced the jacket will need to be
vented. See detailed Instructions pertaining to Steam Safety Valve installation
and operation.
REMOVAL OF FILLING VALVE (TURN THE GAS & ELECTRICITY MAINS OFF)
1. Remove filling valve from kettle jacket pipework.
2. Replace in reverse order.
3. Ensure adequate sealing compound is used to seal the valve.
4. Once the fill valve has been replaced the jacket will need to be vented.
REPLACEMENT PARTS
To order parts, contact your Authorized Service Agent. Supply the model
designation, serial number, part description, part number, quantity, and when
applicable, voltage and phase.
CONTACT US
If you have questions pertaining to the content in this manual, contact Unified
Brands at 888-994-7636.
TROUBLESHOOTING
This unit is designed to operate smoothly and efficiently if properly maintained.
However, the following is a list of checks to make in the event of a problem.
Wiring diagrams are found at the end of this manual. When in doubt, turn unit
off and call for service at 888-994-7636. If an item on the check list is marked
with (X), it means that the work should be done by an Authorized Service Agent.
SYMPTOM WHO WHAT TO CHECK
X indicates items which must be performed by authorized technician.
Display not lit
(Advanced only)
User a. That power supply is on.
Auth Service
Rep Only
b.
Fuses, accessible by removing caps on the side of the control box.
c. For loose or broken wires. X
d.
Temperature controller functioning, by listening for a click
when the switch opens or closes and verifying LEDs on back
of board. X
e. Contactor functioning. X
PROB in display
(Advanced only)
Auth Service
Rep Only
a.
For loose or broken wires or damaged/failed RTD probe. X
b. PCB board malfunction/failure
HI in display
(Advanced only)
Auth Service
Rep Only
a.
For loose or broken wires or damaged/failed RTD probe. X
b.
PCB board malfunction/failure
Kettle is hard to tilt User a.
Gears for foreign materials, and lubrication.
Auth Service
Rep Only
b.
Gears for alignment. X
c.
Worm gears or broken gears. X
Kettle continues
heating
after it reaches the
desired temperature
User a.
Temperature Controller dial setting.
Auth Service
Rep Only
b.
Temperature Controller calibration and offset.X
c.
Temperature Controller operation. The Temperature Controller
should click when the dial is rotated to settings above and
below the temperature of the kettle.X
Kettle stops heating
before it reaches the
desired temperature
User a.
Temperature Controller dial setting.
Auth Service
Rep Only
b.
Temperature Controller calibration and offset.X
c. Temperature Controller operation. The Temperature Controller
should click when the dial is rotated to settings above and
below the temperature of the kettle.X
Safety Valve pops
open
User
a. For air in the jacket. See “Jacket Vacuum” in the Maintenance
b. Temperature Controller dial setting.
Auth Service
Rep Only
c. For defective Temperature Controller. The relay should click
when the dial is rotated to settings above and below the
temperature of the kettle. If defective, replace.X
d.
For defective safety valve. If the valve pops at pressures below
49 PSI, replace.X
Burners will not light User
a. That the main gas supply valve is open. (handle is in line with
gas pipe).
b. Gas supply to the building.
c. That the kettle body is not tilted.
Auth Service
Rep Only
d. Temperature Controller operation. The relay should click
when the dial is rotated to settings above and below the
temperature of the kettle.X
e.
That tilt limit switch is closed when body is not tilted.X
System does not
produce a
spark
Auth Service
Rep Only
a.
AC voltage between terminals on secondary side of
transformer. If it is not 24 Volt, replace the transformer. X
b. That the high tension cable is firmly attached and in good
condition. If cracked or brittle, replace.X
c.
Pilot electric ceramic for crack or break.X
d. Pilot spark gap. Regap.X
Safety valve leaks
a small amount of
steam when kettle
is operating
User a.
For contamination that prevents seating of the valve. With full
pressure in the jacket, pull the leer all the way briefly to blow
the valve clean, then let the lever snap back to seat the valve
Auth Service
Rep Only
b.
Safety valve for defects. Replace any defective valve with an
identical valve. X
Spark is present
but the pilot will
not light
Auth Service
Rep Only
a.
That the pilot valve is securely connected to terminals. X
b.
For 24 VAC at terminals PV and PV/MV. If 24V is not present,
replace the ignition control module. X
b. That gas pressure is at least 3.5” W.C. (8.7818 ub).
c.
For gas at the pilot. If it is not flowing:
(1) Check the pilot gas line for kinks and obstructions. X
(2) Clean orifice, if necessary. X
(3) Check magnetic operator for pilot valve on gas valve.
Repair or replace as necessary. X
d.
That the pilot spark gap is located in the pilot gas stream. If
not, adjust or replace the pilot burner. X
e.
For drafts. Shield the pilot burner, if necessary. X
Pilot lights, but
main burner will
not come on and
spark does not
stay on
Auth Service
Rep Only
a.
For 24 V between terminals MV and PV/MV while pilot is burning.
If 24V is not present, replace the ignition control module. X
b. That gas pressure is at least 3.5” W.C.(8.7818 ub). X
c. Electrical connections of the main valve to terminals, to
assure that they are securely attached. Check magnetic
operator for main valve on gas valve. Repair or replace
as necessary. X
Pilot lights, but
main burner will
not come on, the
spark stays on
Auth Service
Rep Only
a.
Check for bad burner ground. If necessary, repair with
high temperature wire. X
b.
Pilot burner ceramic insulator for cracks. X
c. That cable is not grounded out. If it is, correct the
ground-out condition or replace cable. X
d.
For proper gas pressure. X
e. Clean pilot assembly, or replace if necessary. X
f. Tighten all mechanical and electrical connections. X
g.
If the pilot flame is weak, increase pilot orifice size. X
h. Replace ignition control module. X
Main burner
comes on but will
not stay on
Auth Service
Rep Only
a.
Check burner ground for bad wire or connection. Replace
if necessary with high temperature wire. X
b. Check for low gas supply pressure. If necessary, replace
ignition control module. X

15 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
Parts List
STAND & HOUSING ASSEMBLY
For Classic & Advanced
Control Models
QUANTITY
Ref Description Part #
20 Gal 40 Gal 60 Gal
1 WELDMENT, FRAME, STAND 174805 1 - -
1 WELDMENT, FRAME, STAND 174802 - 1 1
2 WELDMENT, CLADDING, STAND 174806 1 - -
2 WELDMENT, CLADDING, STAND 174812 - 1 1
3 WELDMENT, PEDESTAL 175379 1 - -
3 WELDMENT, PEDESTAL 175330 - 1 1
4 WELDMENT, CLADDING, PEDESTAL 175378 1 - -
4 WELDMENT, CLADDING, PEDESTAL 175337 - 1 1
5 PANEL, SIDE, PEDESTAL 175383 1 - -
5 PANEL, SIDE, PEDESTAL 175336 - 1 1
6SCREW, MACHINE, HEX HEAD, 1/2-
13 X 1-1/2" LONG 008679 4 4 4
7 NUT, HEX, 1/2"-13 005603 4 4 4
8 WASHER, LOCK, 1/2 005657 4 4 4
9 WASHER, PLAIN, 1/2 005049 8 8 8
10 WASHER, LOCK, #8 012971 2 2 2
11 SCREW, MACHINE, TRUSS HEAD
8-32 X 3/8" LONG 137766 14 14 14
-FOOT, ADJUSTABLE, BULLET-FITS
2" TUBE 013275 4 4 4
-FOOT, ADJUSTABLE, FLANGED-FITS
2" TUBE 096569 4 4 4
-EQUIPOTENTIAL ASSEMBLY (CE
ONLY) 122021 1 1 1

16 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
Parts List
GAS VALVE, PIPING & BOTTOM COMPONENTS

17 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
Parts List
GAS VALVE, PIPING & BOTTOM COMPONENTS
QUANTITY
Ref Description Part #
20 Gal 40 Gal 60 Gal 80 Gal
1 TUBE, COPPER, 1/2" OD, SOFT 007334 18
IN
18
IN
10
IN
10
IN
2 ELBOW, 90 DEG, 1/2 NPT, FEMALE 055634 1 1 1 -
3 THERMOSTAT, ELECTRIC 009730 1 1 1 1
4 ELBOW, 90 DEG, 1/2 NPT 008747 4 4 4 5
5 NIPPLE, 1/2 NPT X 2-1/2" LONG 005552 1 1 1 1
6 PROBE, WATER LEVEL, LOW 079811 1 1 1 1
7TEE, 1/2 TUBE X 1/2 TUBE X 3/8
NPT MALE 074593 1 1 1 -
8FITTING, COMPRESSION, STRAIGHT,
1/4 NPT FEMALE 097074 1 1 1 1
9 SWITCH, PRESSURE, 1/4” NPT 096963 1 1 1 1
9 SWITCH, PRESSURE, 1/4” (CE) 177794 1 1 1 1
10 FITTING, COMPRESSION, 5/8 TUBE
X 1/2 NPT MALE 049093 3 3 3 3
11 VALVE, GAS, NATURAL 123815 1 1 1 1
11 VALVE, GAS, PROPANE 128412 1 1 1 1
11 VALVE, GAS, CE MARK, G20 160776 1 1 1 1
11 VALVE, GAS, CE MARK, G31 160796 1 1 1 1
12 BRACKET, SUPPORT, BOTTOM 065382 3 3 3 3
13 SCREW, TRUSS HEAD, 8-32 X 3/8"
LONG 005764 3 3 3 3
14 NUT, HEX, KEPS, 1/4 NT1101 10 10 10 4
16 BAR, 1/8" X 1 X 4-1/4" LONG 005440 1 1 1 1
17 CLAMP, RIGID CONDUIT 068687 1 1 1 1
18 NIPPLE, 1/2 NPT X 5-1/2" LONG,
CHROME PLATED 096933 1 1 - -
18 NIPPLE, 1/2 NPT X 7" LONG,
CHROME PLATED 098519 - - 1 -
19 BOOT, PROBE 101143 1 1 1 1
20 COVER, BOTTOM 049801 1 - - -
20 COVER, BOTTOM 090630 - 1 1 -
20 COVER, BOTTOM 149774 - - - 1
21 CAP, BOTTOM, COVER PLATE 049803 1 1 1 1
22 GASKET, BOTTOM PLATE 007937 3 FT 3 FT 3 FT 4 FT
24 FITTING, COMPRESSION, 90 DEG
ELBOW, 1/8 NPT MALE X 1/4 TUBE 004584 1 1 1 1
25 TUBE, ALUMINUM, 1/4" OD 006796 20
IN
20
IN
20
IN
20
IN
-FITTING, COMPRESSION, 5/8 TUBE
X 1/2 NPT FEMALE 049094 1 1 1 1
-SCREW, TRUSS HEAD, 10-32 X
3/8" LONG 004173 2 2 2 2
- STRAP, EMT CONDUIT, 3/4" 135252 3 3 3 2
- COUPLING, FULL, 1/2" NPT, 150# 005722 1 1 1 1
- ELBOW, 90 DEG, 3/8 NPT 055335 - - - 1
QUANTITY
Ref Description Part #
20 Gal 40 Gal 60 Gal 80 Gal
- ELBOW, 90 DEG, UNION, 1/2 NPT 005495 1 1 1 -
- NIPPLE, 1/2 NPT X CLOSE 008877 1 - - 1
- NIPPLE, 1/2 NPT X 3" LONG 005553 1 1 1 2
- NIPPLE, 1/2 NPT X 3-1/2" LONG 008227 2 2 2 -
- NIPPLE, 1/2 NPT X 5" LONG 005555 - - - 1
- NIPPLE, 1/2 NPT X 6" LONG 008638 1 - - -
- NIPPLE, 1/2 NPT X 8" LONG 005557 - 2 1 -
-NIPPLE, 1/2 NPT X 9.5" LONG,
BLACK IRON 144360 1 1 1
- NIPPLE, 1/2 NPT X 10" LONG 005558 1 - - -
- NIPPLE, 1/2 NPT X 12" LONG 005600 - 1 1 -
- NIPPLE, 1/2 NPT X 13" LONG 005674 - - - 1
- NIPPLE, 1/2 NPT X 14" LONG 149772 - - - 1
- NIPPLE, 1/2 NPT X 15" LONG 048570 - - - 1
- JOINT, SWIVEL, 1/2 NPT (GAS) 076680 1 1 1 1
- VALVE, GAS, SHUT-OFF, 1/2 NPT 098458 1 1 1 1
-SCREW, MACHINE, PAN HEAD, 10-
32 X 1/4" LONG 002962 2 2 2 2
-SCREW, MACHINE, ROUND HEAD,
6-32 X 1/2" LONG 012603 2 2 2 2
- TUBE, GAS PIPING, SUPPLY SIDE 145038 1 - - -
- TUBE, GAS PIPING, TAKE UP SIDE 145037 1 - - -
- TUBE, GAS PIPING, SUPPLY SIDE 145040 - 1 - -
- TUBE, GAS PIPING, TAKE UP SIDE 145039 - 1 - -
- TUBE, GAS PIPING, SUPPLY SIDE 145042 - - 1 -
- TUBE, GAS PIPING, TAKE UP SIDE 145041 - - 1 -
- TUBE, GAS PIPING, SUPPLY SIDE 149765 - - - 1
- TUBE, GAS PIPING, TAKE UP SIDE 150950 - - - 1
- TUBE, GAS PIPING, TAKE UP SIDE 145041 - - 1 -
- TUBE, GAS PIPING, SUPPLY SIDE 149765 - - - 1
- TUBE, GAS PIPING, TAKE UP SIDE 150950 - - - 1
-1/2” NPT TO 1/2” BSPT ADAPTER
(CE) 116392 1 1 1 -

18 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
Parts List
MODULE BOX
Ref Description Part # Qty
1 NUT, LOCK, 1/2, CONDUIT 005487 1
2SCREW, TRUSS HEAD, 8-32 X
3/8" LONG 005764 6
3 MODULE BOX 123775 1
3 MODULE BOX (CE) 154061 1
4 GASKET, MODULE BOX 104941 1
4 GASKET, MODULE BOX (CE) 154070 1
5 MODULE, IGNITION 085153 1
5 MODULE, IGNITION (CE) 154059 1
6 NUT, HEX, KEPS, 6-32 071289 2
7ADAPTER, CONDUIT, PLASTIC,
MALE 123733 1
8 COVER, MODULE BOX 104948 1
8 COVER, MODULE BOX (CE) 154067 1
9 NUT, HEX, KEPS, 8-32 069784 1
10 ANCHOR, CABLE TIE, SCREW-
MOUNTED 102231 1
11 STRAP, CABLE TIE 011093 1
12 CABLE. HI VOLTAGE, SPARK
IGNITION 096728 1
-SCREW, HEX BINDER HEAD,
10-32 X 3/8" LONG 084201 2

19 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
Parts List
BURNER & PILOT/FLAME SENSOR COMPONENTS
QUANTITY
Ref Description Part #
20 Gal 40 Gal 60 Gal 80 Gal
1 BAFFLE PLATE 123496 1 - - -
1 BAFFLE PLATE 123497 - 1 - -
1 BAFFLE PLATE 123498 - - 1 1
2 NUT, HEX,SERRATED, 1/4-20 NT1101 8 8 8 8
3 PILOT BURNER, NAT GAS OR G20 123580 1 1 1 1
3 PILOT BURNER, PROPANE OR G31 128415 1 1 1 1
4 BRACKET, BURNER SUPPORT 117008 2 - - -
4 BRACKET, BURNER SUPPORT 117009 - 2 - -
4 BRACKET, BURNER SUPPORT 117010 - - 2 2
5 BRACKET, BURNER 117011 2 - - -
5 BRACKET, BURNER 117012 - 2 - -
5 BRACKET, BURNER 117013 - - 2 2
- WASHER, FENDER, 1/4 132107 - - 3 3
6 BURNER MANIFOLD AND ORIFICES NOTE 1 1 1 1 1
NOTE 1
CONTACT FACTORY WITH ELEVATION AND GAS TYPE
(NATURAL, PROPANE, G20, G31, OR SPECIAL MIX) TO OBTAIN
CORRECTMANIFOLD AND ORIFICES.

20 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
Parts List
FLUE STACK
QUANTITY
Ref Description Part # 20 Gal 40 Gal 60 Gal 80 Gal
1FLUE, MAIN BODY
& FRONT SECTION
117035
117036 1 - - -
1FLUE, MAIN BODY
& FRONT SECTION
117031
117032 - 1 - -
1FLUE, MAIN BODY
& FRONT SECTION
137874
137872 - - 1 -
1FLUE, MAIN BODY
& FRONT SECTION
149220
150927 - - - 1
2FLUE, TOP PLATE,
TOP SECTION 117038 1 - - -
2FLUE, TOP PLATE,
TOP SECTION 117029 - 1 - -
2FLUE, TOP PLATE,
TOP SECTION 128169 - - 1 -
2FLUE, TOP PLATE,
TOP SECTION 149222 - - - 1
3FLUE, TOP PLATE,
BOTTOM SECTION 117037 1 - - -
3FLUE, TOP PLATE,
BOTTOM SECTION 117033 - 1 - -
3FLUE, TOP PLATE,
BOTTOM SECTION 117028 - - 1 -
3FLUE, TOP PLATE,
BOTTOM SECTION 149236 - - - 1
4
SCREW, TRUSS
HEAD, 10-32 X 1/2
LONG
072189 6 6 8 8