Groen DH-CE Mark, DHT-CE Mark Operation Manual

OPERATOR MANUAL &
SERVICE MANUAL

IMPORTANT INFORMATION, KEEP FOR OPERATOR

This manual provides information for:

MODELS DH-CE Mark
& DHT-CE Mark International

STEAM JACKETED
KETTLES

· Self-Contained

· Stainless Steel

· Gas Heated

· Floor Mounted

· Tilting

DH

THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE.
READ, UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND
WARNINGS CONTAINED IN THIS MANUAL (THE SERVICE
MANUAL AND OPERATOR MANUAL SECTIONS).

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.

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.

PART NUMBER 128417, REV. D (6/06)

DHT

1055 Mendell Davis Drive

Jackson, MS 39272

888-994-7636, fax [phone]

groen.com

OM/SM-DH-CE

IMPORTANT — READ FIRST — IMPORTANT

IT IS MOST IMPORTANT THAT THESE INSTRUCTIONS AND THE OPERATOR AND SERVICE
MANUALS BE CONSULTED BEFORE INSTALLING AND COMMISSIONING THE APPLIANCE.
FAILURE TO COMPLY WITH SPECIFIED PROCEDURES MAY RESULT IN DAMAGE OR THE NEED
FOR A SERVICE CALL.

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.

THESE APPLIANCES MUST BE INSTALLED BY A COMPETENT PERSON IN CONFORMITY WITH
INSTALLATION AND SERVICING INSTRUCTIONS AND NATIONAL REGULATIONS IN FORCE AT
THE TIME. PARTICULAR ATTENTION MUST BE PAID TO THE FOLLOWING:

I. E. E. REGULATIONS FOR ELECTRICAL INSTALLATIONS
ELECTRICITY AT WORK REGULATIONS
GAS SAFETY (INSTALLATION AND USE) REGULATIONS
HEALTH AND SAFETY AT WORK ACT
LOCAL AND NATIONAL BUILDING REGULATIONS
FIRE PRECAUTIONS ACT

DETAILED RECOMMENDATIONS ARE CONTAINED IN INSTITUTE OF GAS ENGINEERS
PUBLISHED DOCUMENTS: IGE/UP/1, IGE/UP/2, BS6173 AND BE5440. FURTHERMORE, IF A NEED
ARISES TO CONVERT THE APPLIANCE FOR USE WITH ANOTHER GAS, A COMPETENT PERSON
MUST BE CONSULTED. THOSE PARTS WHICH HAVE BEEN PROTECTED BY THE
MANUFACTURER MUST NOT BE ADJUSTED BY THE USER.

USERS SHOULD BE CONVERSANT WITH THE APPROPRIATE PROVISIONS OF THE FIRE
PRECAUTIONS ACT AND THE REQUIREMENTS OF THE GAS SAFETY REGULATIONS. IN
PARTICULAR THEY SHOULD BE AWARE OF THE NEED FOR REGULAR SERVICING BY A
COMPETENT PERSON TO ENSURE THE CONTINUED SAFE AND EFFICIENT PERFORMANCE OF
THE APPLIANCE.

WARNING: TO PREVENT SHOCKS, ALL APPLIANCES GAS OR ELECTRIC, MUST BE

EARTHED.

UPON COMPLETION OF THE INSTALLATION, THE OWNERS MANUAL SHOULD BE HANDED TO
THE USERS AND THE INSTALLER SHOULD INSTRUCT THE RESPONSIBLE PERSON(S) IN THE
CORRECT OPERATION AND MAINTENANCE OF THE APPLIANCE.
THIS EQUIPMENT IS ONLY FOR PROFESSIONAL USE, AND SHALL BE OPERATED BY QUALIFIED
PERSONS. IT IS THE RESPONSIBILITY OF THE SUPERVISOR OR EQUIVALENT TO ENSURE THAT
USERS WEAR SUITABLE PROTECTIVE CLOTHING AND TO DRAW ATTENTION TO THE FACT
THAT SOME PARTS BY NECESSITY WILL BECOME VERY HOT, AND WILL CAUSE BURNS IF
TOUCHED ACCIDENTALLY.

WARNING: BEFORE REMOVING ANY PARTITION OR PANEL, ALWAYS TURN OFF THE

ELECTRIC POWER AND ALLOW THE FAN TO STOP ROTATING. BEFORE
WORKING ON ANY ELECTRICAL COMPONENT, DISCONNECT THE POWER
SOURCE FROM THE UNIT.

NOTE: IT IS IMPORTANT THAT THE END-USER ROUTINELY EXAMINE THE FLUE OUTLET

ON A REGULAR BASIS. DEBRIS COVERING THE FLUE OUTLET CAN CAUSE A
POTENTIALLY HAZARDOUS CONDITION. REMOVE ANY FOREIGN MATERIAL
BEFORE USING THIS PIECE OF EQUIPMENT.

WARNINGS AND CAUTIONS PROVIDED IN THIS OPERATOR AND SERVICE MANUAL MUST BE
COMPLIED WITH.

2 OM/SM-DH CE

Contents

Regulations and Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.1 Model Numbers, Net Weights & Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2 Siting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.5 Electrical Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.6 Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.7 Total Gas Rate - Natural and Propane Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.8 Injector Diameters-Natural and Propane Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.9 Gas Pressure Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.10 Burner Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Assembly and Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Electrical Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4 Jacket Water Level/Jacket Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.5 Pre-Commissioning Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.6 Instruction to User . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 Servicing and Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.1 Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2 Jacket Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3 Jacket Filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.4 Water Treatment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.5 Removal of Control Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.6 Removal of Spark Ignition Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.7 Removal of Low Water Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.8 Removal of Tilt Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.9 Removal of Gas Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.10 ON/OFF Switch and Reset Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.11 Removal of Neons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.12 Removal of Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.13 Removal of Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.14 Low Water Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.15 Removal of the Burners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.16 Spark Electrode/Flame Sensing Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.17 Removal of Pressure Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.18 Removal of Sight Glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.19 Safety Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.20 Filling Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.21 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5 User Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1 Equipment Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.2 Lighting and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.3 Cleaning and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Service Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

OM/SM-DH CE 3

Regulations and Safety Precautions

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.

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:

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

Furthermore, if a need arises to convert the Appliance for use with another gas, a competent person must
be consulted. Those parts which have been protected by the manufacturer MUST NOT be adjusted by the
User.

Users should be conversant with the appropriate provisions of the Fire Precautions Act and the
requirements of the Gas Safety Regulations. In particular the need for regular servicing by a competent
person to ensure the continued safe and efficient performance of the Appliance.

WARNING

TO PREVENT SHOCKS, ALL APPLIANCES WHETHER GAS OR ELECTRIC, MUST BE EARTHED.

Upon completion of the installation, the Owners Manual should be handed to the users and the installer
should instruct the responsible person(s) on the correct operation and maintenance of the Appliance. This
equipment is ONLY FOR PROFESSIONAL USE, and shall be operated by QUALIFIED persons. It is the
responsibility of the Supervisor or equivalent to ensure that users wear SUITABLE PROTECTIVE
CLOTHING and to draw attention to the fact that, some parts will, by necessity, become VERY HOT and
will cause burns if touched accidentally.

IMPORTANT - READ FIRST - IMPORTANT The Groen Steam Jacketed Kettle you have just purchased
has been handcrafted from the finest materials, meticulously inspected, and carefully tested to ensure that
you receive the best possible product. With reasonable care and periodic maintenance, it will provide
years of faithful service. It is recommended that you establish a timetable for periodic maintenance as
outlined in this manual. Space is provided in the Service Log at the back of this manual.

4 OM/SM-DH CE

Section 1

Installation

UNLESS OTHERWISE STATED, PARTS WHICH HAVE BEEN PROTECTED BY THE
MANUFACTURER ARE NOT TO BE ADJUSTED BY THE INSTALLER.

1.1 Model Numbers, Net Weights and
Dimensions

MODEL•

DH-20 DH-40 DH-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

245 295 400

WEIGHT

lbs

535 645 880

1.2 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.

1.3 Clearances

Minimum clearances of 150 mm (5.9 in) from the
sides of the appliance and 250 mm (9.8 in) from
the rear of the appliance are required if the
appliance is installed next to combustible
surfaces. A vertical clearance of 750 mm (29.6
in) minimum should be allowed between the top
rim of kettle and any overlying surface.

1.4 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.

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.

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

1.5 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

OM/SM-DH CE 5

Gas and Electrical Connections are made at the rear of the unit.

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 Paragraphs

3.5.1 and 3.5.2.

Provide 230 VAC, 50 Hz, 1 Phase, 1 AMP or 40
Watts service. The electrical schematic is in the
service compartment and this manual.

WARNING

THIS APPLIANCE MUST BE EARTHED.

1.6 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.

Water Supply-Not applicable.

1.7 Total Gas Rate - Natural (G20 and G25)
and Propane (G31) Gas

Model Kw BTU/hr

DH-20

18.6 63,500

DH-40

24.5 83,600

DH-60

39.6 135,200

6 OM/SM-DH CE

1.8 Injector Diameters-Natural and Propane
Gas (See Note, Paragraph 1.10 at right)

Model DH-20 DH/1-40 DH-60

Number of
Injectors

15 20 25

Natural
Gas G20

1.10 mm 1.25 mm 1.30 mm

Natural
Gas G25

1.20 mm 1.25 mm 1.40 mm

Propane
Gas G31

0.65 mm 0.75 mm 0.75 mm

1.9 Gas Pressure Adjustment

A pressure test point is fitted on the burner
manifold and on the gas control valve.

DH-20 DH/1-40 DH-60

Natural
Gas-G20

mBar

8.75 5.8 8.25

WCI* 3.5 2.3 3.3

Natural
Gas-G25

mBar 8.0 7.0 8.25

WCI* 3.2 2.8 3.3

Propane
Gas-G31

mBar 29 21 25

WCI* 11.6 8.4 10.0

*WCI = Water Column Inches

NOTE: With reference to gas rate, pressure
adjustments and conversions, this appliance
is CE-approved for use with the following
gases:

a) G20 natural gas may be supplied to the

appliance in Austria, Belgium, Denmark,
Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg,
Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.

b) G25 natural gas may be supplied to the

appliance in Belgium, France and the
Netherlands.

c) G31 propane gas may be supplied to the

appliance in France, 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.

1.10 Burner Adjustment

The burners are fixed aeration type and have no
provision for adjustment of air inlet.

OM/SM-DH CE 7

Before operation, check the water level and
jacket pressure.

Section 2

Assembly and Commissioning

2.1 Assembly

d) Unpack the appliance

b) Place on a firm, level floor. Adjust and fix the

feet.

CAUTION
SHIPPING STRAPS ARE UNDER TENSION
AND CAN SNAP BACK WHEN CUT. TAKE
CARE TO AVOID PERSONAL INJURY OR
DAMAGE FROM STAPLES LEFT IN THE
WALLS OF THE CARTON.

2.2 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.

CAUTION

ENSURE THAT THE KETTLE CONTAINS
LIQUID WHEN THE BURNERS ARE ALIGHT.

2.3 Electrical Supply

Before commissioning the appliance, ensure that
the electrical installation has been carried out to
the relevant regulations (Paragraph 1.5).

WARNING

THIS APPLIANCE MUST BE EARTHED.

2.4 Jacket Water Level/Jacket Pressure

a) 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 Paragraph 3.3.

b) 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
"Jacket Vacuum" (Paragraph 3.2).

2.5 Pre-Commissioning Check

a) Prior to operation, clean out kettle pan

thoroughly using hot water and detergent.
Rinse pan thoroughly.

b) Remove all literature and packing materials

from the interior and exterior of the unit.

c) 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 on Page 11 for
Safety Valve installation and operation.

2.5.1 Lighting Sequence

From Initial Start Up:

a) Put a small amount of water in kettle pan.

b) Ensure gas and electricity mains are “on.”

c) Switch the toggle switch to the "on" position.

d) Turn thermostat dial to desired setting.

e) Verify that spark igniter lights the burners.

8 OM/SM-DH CE

f) If the unit does not light, it will lock-out. Turn

it off and wait one or two minutes before
attempting to switch the unit on again.

g) Press reset lock-out switch and repeat steps

(b) to (e).

h) To switch unit off, switch toggle (On/Off)

switch to the "Off" position.

i) Turn gas and electricity mains off.

2.5.2 Setting The Gas Pressure

a) It is necessary to check the gas pressure

during commissioning. A pressure gauge
must be connected to the pressure test point
on the gas control valve or the gas manifold.
See figure above for test points.

b) When checking pressure at test points on

the gas valve, undo the screw a half turn and
slip tube over nipple.

c) Turn the main gas and electricity supply on.

d) Light the burners (Paragraph 2.5.1).

e) Remove control cabinet side panel screws.

f) Remove governor cap screw from control

valve. See figure for position on valve.

g) Governor is suitable for both natural and

propane gas.

h) 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.

i) Disconnect the pressure gauge from the test

point. Re-seal the pressure test point and
test for gas soundness.

j) Replace governor cap screw and replace lid

and panels.

2.5.3 Checking Performance of Controls

a) Light the unit. Check that controls quickly

and smoothly produce a healthy spark from
the electrode to the earthing post.

b) Turn thermostat off and then on. Check that

burners go out and reignite smoothly and
quickly when switched back on. Repeat
several times.

c) If the unit fails to respond as described, it

should be serviced by an authorized Groen
service agent.

2.6 Instruction to Installer

Important: 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.

OM/SM-DH CE 9

Section 3

Servicing and Conversion

IMPORTANT

BEFORE ATTEMPTING ANY SERVICING, ENSURE THAT THE ISOLATING COCK IS TURNED OFF
AND CANNOT BE INADVERTENTLY TURNED ON AND 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 SECTION 1.

ALWAYS CHECK FOR GAS SOUNDNESS AFTER CARRYING OUT ANY SERVICING OR EXCHANGE
OF GAS CARRYING COMPONENTS.

NOTE: When replacing wiring connections refer to the wiring diagram contained on the unit and within

this manual.

After Servicing

a) Test for gas soundness as specified in

IGE/UP1 as appropriate after any gas
connection has been disturbed.

b) 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.

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

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.

WARNING
AVOID ANY EXPOSURE TO THE STEAM
BLOWING OUT OF THE SAFETY VALVE.

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 a boiler, 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.

10 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
DIS C H ARGE P I PE IS PR O P ERLY
CONNECTED TO VALVE OUTLET AND
ARRANGED TO CONTAIN AND SAFELY
DISPOSE OF BOILER DISCHARGE (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

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:

OM/SM-DH CE 11

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!

9) 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
G25 or G31) change the following:

Burner injector
Pressure setting
Data plate

The governor spring does not need to be
changed; only the pressure setting.

AL L CONVERSIONS MUS T BE FOR
APPROVED GAS IN THE COUNTRIES LISTED
IN PARAGRAPH 1.9.

IMPORTANT
THIS APPLIANCE WAS FITTED AT THE
FACTORY WITH GAS INJECTORS FOR TYPE
G20 NATURAL GAS. INJECTORS FOR TYPE
G25 NATURAL GAS ARE SHIPPED AS AN
ACCESSORY. 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
A V O I D EXPOSURE
TO STEAM BLO W ING
O U T O F T H E
S A F E T Y VALVE.

3.3 Jacket Filling
(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.

12 OM/SM-DH CE

The procedure for adding water follows:

a) 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.

b) Allow the kettle to cool completely. Using the

proper size spanner, remove the pipe plug
from above the globe valve.

c) 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.

d) Air introduced to the jacket during the filling

operation must be removed to obtain
efficient heating. See Paragraph 3.2.

See detailed Instructions on Page 11 pertaining
to Safety Valve installation and operation.

3.4 Water Treatment Procedure

WARNING
READ AND FOLLOW WATER TREATMENT
COMPOUND LABEL PRECAUTIONS TO
AVOID INJURY.

a) Fill the mixing container with the measured

amount of water required. (See Table). Use

distilled water only.

Model Kettle Capacity Jacket Capacity

DH-20

75.7 Litres 6.6 Litres

DH-40

151.4 Litres 7.1 Litres

DH-60

227.1 Litres 11.3 Litres

b) 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.

c) 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).

d) 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.

e) 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.

3.5 Control Panels

3.5.1 Control Cabinet Lid

a) Remove the four screws around the edge of

the lid securing it to the control cabinet.

b) Remove the lid.

c) Replace in reverse order.

3.5.2 Control Cabinet Side Panel

a) Remove lid (Para 3.5.1).

b) Remove the four screws securing the side

panel to the control cabinet.

c) Remove panel.

d) Replace in reverse order.

3.5.3 Supporting Column Access Panels

a) Remove the four screws securing the two

panels to the supporting column.

b) Remove both panels.

c) Replace in reverse order.

OM/SM-DH CE 13

OM-SM-DH-CE

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) Disconnect electrical leads from spark

ignition module.

c) Remove retaining screws securing module.

d) Withdraw spark ignition module from control

cabinet.

e) Replace in reverse order.

3.7 Removal of Low Water Level Control
Relay (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 from its base

by undoing the two retaining clips.

d) 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 5º to 10º.

3.9 Removal of Gas Control Valve (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 control

valve.

14 OM/SM-DH CE

d) Undo union fittings on outlet side of the

control valve.

e) Remove control valve from control cabinet.

f) Replace in reverse order.

3.10 Removal of ON/OFF Switch and Reset
Button (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 the On/Off

switch or reset button.

d) Undo and remove retaining collar which

secures the On/Off switch to the outer
surface, and the reset button to the inner
surface of the control cabinet.

e) Withdraw the On/Off switch or the reset

button as required.

f) Replace in reverse order.

3.11 Removal of Neons (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 the electrical leads to the neon.

d) Undo and remove the retaining collar which

secures the neon to the control cabinet.

e)

Withdraw the neon from the control cabinet.

f) Replace in reverse order.

3.12 Removal of Thermostat (Turn the gas
and electricity mains off)

a) Remove supporting column access panels

(Para 3.5.3).

b) Remove panel from kettle base by undoing

the retaining screws.

c) Drain kettle by tilting kettle slightly and

undoing phial boss connection. Allow kettle
to drain into a suitably sized container.

WARNING

ENSURE THAT THE

OTHER ELECTRICAL
LEADS AND CONNECTIONS SITUATED IN
THE KETTLE BASE DO NOT GET WET.
REMOVE THEM IF NECESSARY.

Important: Drained water from kettle jacket
should be retained. Jacket was charged at
the factory with the correct amount of treated
water. This water should be used to refill the
kettle. However, if water is lost during
drainage see Paragraph 3.3, Jacket Filling.

d) Remove thermostat control knob and

disconnect electrical leads.

e) Undo and remove thermostat retaining

screws securing the thermostat to the
supporting column.

f) Feed thermostat phial through supporting

column and withdraw the thermostat.

g) Replace in reverse order.

h) Ensure an adequate sealant is used to seal

the replacement thermostat phial boss.

i) Once the thermostat is in place, the jacket

should be refilled. (Para 3.3)

Always refer to wiring diagram when re­connecting leads. (See Page 30)

OM/SM-DH CE 15

3.13 Removal of Pressure Switch (Turn
the gas and electricity mains off)

a) Remove panel from base of kettle by

undoing the retaining screws.

b) Disconnect the electrical leads from the

pressure switch.

c) Drain kettle by tilting kettle slightly and

undoing the compression fitting at the
pressure switch. Allow kettle to drain into a
suitably sized container.

d) Remove and withdraw the pressure switch

from the kettle base by undoing the
compression fitting.

e) Replace in reverse order.

f) Once the pressure switch is in place, the

kettle jacket should be refilled. (Para 3.3)

Always refer to wiring diagram when
reconnecting electrical leads. (See Page 30)

3.14 Removal of Low Water Level Sensor
(Turn gas and electricity mains off)

a) Remove panel from base of kettle by

undoing the retaining screws.

b) Disconnect the electrical leads from the

water sensor.

c) Drain the kettle by tilting it slightly and

undoing the low water level sensor. Allow the
kettle to drain into a suitably sized container.

d) Remove the low water sensor from the kettle

base.

e) Replace in reverse order.

f) Ensure a suitable sealant is used to seal the

low water level sensor Boss.

g) When the low water level sensor is in place,

the jacket should be filled. (Para 3.3)

3.15 Removal of Burners (Turn the gas
and electricity mains off)

a) Undo compression fitting at gas pipe to

burner manifold.

b) Disconnect electrical leads to the igniter and

flame sensor.

c) 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.

d) The burners are now accessible and can be

removed as required. Ensure adequate
sealant is used to seal the burners.

e) Replace in reverse order.

Always check for gas soundness when any
part of the gas circuit has been disturbed.

3.16 Removal Of Spark Electrode/Flame
Sensing Bracket (Turn the gas and
electricity mains off)

a) Perform the procedure in Para 3.5.3a.

b) Perform the procedure in Para 3.5.3b.

c) Disconnect the HT spark connection from

igniter.

16 OM/SM-DH CE

Recommended spacings are shown in this drawing.

DH-20 shown

d) Perform the procedure in Paragraph 3.13(a).

e) Remove the spark electrode or flame

sensing electrode by unscrewing it.

f) Replace in reverse order.

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.

i) If the burners do not light, or ignite but do not

remain lit, further adjustment to the sparking
or sensing electrode is required.

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.

OM/SM-DH CE 17

f) Once the sight glass has been replaced, the

lost jacket water requires replacement. (Para

3.3)

3.19 Removal of Safety Valve (Turn the
gas and electricity mains off)

a) Remove the elbow from the safety valve.

b) Remove the safety valve from kettle jacket

pipework.

c) Replace in reverse order.

d) Ensure an adequate sealing compound is

used to seal the safety valve.

e) Once the safety valve has been replaced the

jacket will need to be vented. (Para 3.2)

See detailed Instructions on Page 11 pertaining
to Safety Valve installation and operation.

3.20 Removal of Filling Valve (Turn the
gas and electricity mains off)

a) Remove filling valve from kettle jacket pipe-

work.

b) Replace in reverse order.

c) Ensure adequate sealing compound is used

to seal the valve.

d) Once the fill valve has been replaced the

jacket will need to be vented. (Para 3.2)

3.21 Fuse Replacement (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) Remove fuse from vertical fuse holder.

d) Replace fuse (identical to fuse removed)

e) Replace in reverse order.

18 OM/SM-DH CE

4. Troubleshooting

Your Groen kettle is designed to operate smoothly and efficiently if properly maintained. However, the
following are checks to make in the event of a problem. Wiring diagrams are inside the service panel.

USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY GROEN OR THEIR
AUTHORIZED DISTRIBUTORS CAN CAUSE INJURY TO THE OPERATOR AND DAMAGE TO THE
EQUIPMENT AND WILL VOID ALL WARRANTIES.

SYMPTOM WHO WHAT TO CHECK

Kettle is hard to tilt. User a. Gears for foreign materials, lubrication and alignment.

Burners will not light. User a. Is main gas valve open (handle in line with gas pipe)?

b. Gas supply to your building.
c. That kettle body is not tilted.
d. Is electric power turned on at the circuit breaker or

fuse box, and is power being supplied to the
appliance

e. Thermostat operation.

Kettle continues heating after it
reaches the desired temperature.

User a. Thermostat dial setting.

Auth
Service
Rep Only

b. Thermostat calibration.
c. Thermostat operation. Thermostat should click when

the dial is rotated above and below a setting.

Kettle stops heating before it reaches
the desired temperature.

User a. Thermostat dial setting.

Auth
Service
Rep Only

b. Thermostat calibration.
c. Thermostat. Thermostat should click when the dial is

rotated above and below a setting.

Kettle heats slowly User a. Air in jacket - pressure/vacuum gauge (20 to 30

below zero when the kettle is cold?)

Safety valve pops. User a. Air in jacket - pressure/vacuum gauge (20 to 30

below zero when the kettle is cold?)

b. Whether kettle was being heated while empty.

Auth
Service
Rep Only

c. If high pressure limit switch is set too high.
d. Thermostat. Thermostat should click when the dial is

rotated above and below a setting.

e. Safety valve. If valve pops below 300 PSI, replace.

System does not produce a spark Auth

Service
Rep Only

a. Thermostat. Close the contacts if they are open
b. AC voltage between terminals “1" and “GR.” If it is

not 230 Volt, check the high limit switch, which
should be closed.

c. That the high tension cable is firmly attached and in

good condition. If cracked or brittle, replace the pilot.
e. Electrode ceramic for crack or break.
f. Electronic spark ignition module. Replace if needed.

Spark is present but the pilot will not
light.

Auth
Service
Rep Only

a. That the gas valve is opening.
b. That pressure meets the control manufacturer’s

specifications.
c. For gas at the pilot. If it is not flowing:

(1) Check pilot gas line for kinks or obstructions.

(2) Clean orifice, if necessary.

(3) Replace the pilot valve.

Pilot lights, but main burner will not
come on and spark does not stay
on.

Auth
Service
Rep Only

a. That the gas pressure meets the control

manufacturer’s specifications.
b. Replace electric module.

OM/SM-DH CE 19

OM/SM-DH-CE

SYMPTOM WHO WHAT TO CHECK

Pilot lights, but main burner will not
come on, the spark stays on.

Auth
Service
Rep Only

a. Sensor cable, to make certain that there are secure

attachments to terminal “13" and the sensor.
b. Sensor ceramic for cracks.
c. That cable is not grounded out. If it is, correct the

ground.
d. Sensor cable for continuity and condition of

insulation.
e. (1) Check the gas pressure.

(2) Clean the pilot Assembly.

(3) Tighten mechanical and electrical connections.

Pilot lights, but main burner will not
come on, and spark does not stay
on.

Auth
Service
Rep Only

a. Than gas pressure complies with nameplate ratings.
b. Electronic spark ignition module. Replace if

necessary.
c. That both gas solenoids are staying open.

Main burner comes on but will not
stay lit.

Auth
Service
Rep Only

a. Check burner ground for bad wire or connection.

Replace with high temperature wire if necessary.
b. Check for low gas supply pressure. If necessary,

replace ignition control module.
c. Ceramic insulator or pilot flame sensor cracked.

Replace flame sensor.

20 OM/SM-DH CE

OM-SM-DH-CE

OM/SM-DH-CE

5. User Instructions

Regulations and Safety Precautions

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.

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:

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

Furthermore, if a need arises to convert the Appliance for use with another gas, a competent person must
be consulted. Those parts which have been protected by the manufacturer MUST NOT be adjusted by the
User.

Users should be conversant with the appropriate provisions of the Fire Precautions Act and the
requirements of the Gas Safety Regulations. In particular the need for regular servicing by a competent
person to ensure the continued safe and efficient performance of the Appliance.

WARNING

TO PREVENT SHOCKS, ALL APPLIANCES WHETHER GAS OR ELECTRIC, MUST BE EARTHED.

Upon completion of the installation, the Owners Manual should be handed to the users and the installer
should instruct the responsible person(s) on the correct operation and maintenance of the Appliance. This
equipment is ONLY FOR PROFESSIONAL USE, and shall be operated by QUALIFIED persons. It is the
responsibility of the Supervisor or equivalent to ensure that users wear SUITABLE PROTECTIVE
CLOTHING and to draw attention to the fact that, some parts will, by necessity, become VERY HOT and
will cause burns if touched accidentally.

IMPORTANT - READ FIRST - IMPORTANT The Groen Steam Jacketed Kettle you have just purchased
has been handcrafted from the finest materials, meticulously inspected, and carefully tested to ensure that
you receive the best possible product. With reasonable care and periodic maintenance, it will provide
years of faithful service. It is recommended that you establish a timetable for periodic maintenance as
outlined in this manual. Space is provided in the Service Log at the back of this manual.

5.1 Equipment Description

5.1.1 General

Groen models DH are stainless steel, steam
jacketed, floor mounted, tilting kettles with a
self-contained, gas-heated steam source. The
kettle body is welded into one piece and
furnished with a reinforced bar rim and welded
"butterfly" pouring lip. The interior of the kettle
is polished to a 180 emery grit finish, and the

exterior is given a bright semi-deluxe finish.
The unit is ASME shop inspected and
registered with the National Board for working
pressures up to 50 PSI. Kettle support, tilting
mechanism, and controls are contained in an
enclosed base resting on tubular legs with
adjustable ball feet. Tilting is provided by a self­locking, worm-and-gear device.

OM/SM-DH CE 21

OM/SM-DH-CE

The self-contained steam source is heated by
propane or natural gas and ignition is by
electronic spark.

Charged at the factory with treated, distilled
water, the steam source provides kettle
temperature of 65• C to 150• C. Controls for the
unit include a thermostat, pressure gauge,
gauge glass, safety valve, pressure limit
control, low water cut-off, on/off switch, and a
multi-functional gas control valve.

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

Service connections are required for gas and
230-V, single phase, 50-Hz electricity.

IMPORTANT

Prior to operation, clean out the kettle pan
thoroughly using hot water and detergent.
Rinse out and dry thoroughly.

The gas burners are protected by an
electronic flame failure device which
incorporates automatic ignition of the
burners and instant shut-off of the gas
supply to the burners should a gas supply
interruption occur.

5.1.2 Available Options

Options available with listed models are :

a. No. 31 lift-off cover.
b. No. 51 one piece, counterbalanced cover

with actuator. (Factory installed option).
c. Basket insert.
d. Water filler with swing spout and bracket
e. Kettle brush kit.

5.1.3 Operational and Maintenance Safety

WARNING
INSTALLATION OF THE UNIT MUST BE
DONE BY PERSONNEL QUALIFIED TO
WORK WI T H ELEC T R ICITY A ND
PLUMBING IN ACCORDANCE WITH ALL
APPLICABLE CODES.

BEFORE REPLACING ANY PARTS,
DISCONNECT THE UNIT FROM THE
ELECTRIC POWER SUP

PLY AND CLOSE
THE MAIN GAS COCK. ALLOW FIVE
MINUTES FOR UNBURNED GAS TO VENT.

TO PREVENT SHOCKS, ALL APPLIANCES
WHETHER GAS OR ELECTRIC, MUST BE
EARTHED.

CAUTION
BE SURE ALL OPERATORS READ,
UNDERSTAND, AND FOLLOW THE
OPERATING INSTRUCTIONS, CAUTIONS
AND SAFETY INSTRUCTIONS CONTAINED
IN THIS MANUAL.

22 OM/SM-DH CE

OM/SM-DH-CE

5.2 Lighting and Operation

5.2.1 Initial Kettle Lighting and
Operational Readiness Check

After the DH Kettle has been installed
according to service and installation
instructions, perform initial start-up as a test, to
ensure that the unit is operating correctly. Refer
to the pictures on this page for identification of
DH kettle controls and indicators.

a) Remove all literature and packing material

from the interior and exterior of the unit.

b) Make sure gas and electricity supplies are

switched on.

c) Ensure that the kettle is filled with water

before lighting.

d) Check the water level in the jacket. The

level should be between the lines on the
gauge glass. If the level is low the jacket
water level will be required to be topped up.
(This will require a service call).

e) Check the pressure gauge. If the gauge

does not show sufficient vacuum (20 to 30
below zero) then the jacket will require
venting. (This will require a service call).

f) Switch the On/Off switch to the "On"

position. The "power on" neon will
illuminate.

g) Turn the thermostat dial to the required

setting.

h) After 10-15 seconds the burners should

light. The "heat" neon will illuminate.

i) In the event the burners do not light, or go

out as indicated by the illumination of the
lockout indicating neon, turn the unit off.
Wait approximately one minute. Press the
lockout reset and repeat steps (d) to (h).

WARNING
AVOID CONTACT WITH THE FLUE.
SURFACES ARE VERY HOT AND WILL
CAUSE BURNS.

DO NOT OBSTRUCT FLUE OPENING.

5.2.2 To Shut Down Kettle

a. Turn the thermostat dial to the "Off''

position.

b. Switch the On/Off switch to the "Off"

position.

c. For a prolonged shut down, turn the gas

and electricity mains off.

Follow steps a and b.

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OM/SM-DH-CE

5.2.3 Filling the Kettle

Prior to operation, thoroughly clean the kettle
using hot water and detergent.

Kettle capacities:

Model Maximum Capacity
DH-20 75 Litres
DH-40 150 Litres
DH-60 225 Litres

To prevent surge boiling, no more than 80%
of the maximum capacity should be used.

5.2.4 Users Thermostat

Provides automatic control of the Kettle Jacket
temperature at settings up to 147• C maximum.

5.2.5 Sequence of Operation

The following "sequence of operation" outline is
provided to help the user understand how the
unit functions.

When the operator sets a temperature on the
thermostat dial, the thermostat switch closes
and sends a signal which (1) starts the spark
and (2) opens the automatic valve for the
burners.

The spark ignites the burner on low flow. The
flame completes a circuit at the sensing probe
and sends a signal that causes the spark to
shut off and the automatic valve to open to full
flow once a flame has been detected. If a flame
is not detected within 15 seconds the gas is
automatically cut-off and the appliance is
locked-out. The unit can only be re-lit once the
reset button has been pressed.

In addition to the lockout timer, safety features
include:

a. Low-water cut-off relay that will shut off the

gas supply to all burners until the water
level is corrected.

b. High pressure switch, set to open at about

46 PSI and shut down the burners until
jacket pressure is decreased.

c. Pop safety valve, which will release steam

if the jacket pressure exceeds 50 PSI.

See detailed Instructions on Page 11 pertaining
to Safety Valve installation and operation.

d. Tilt cut-off switch that shuts off all burners

when the kettle is tilted.

When the kettle reaches the set temperature,
the thermostat switch opens, stopping the
signal to the gas control valve and causing the
valve to shut off all gas flow. When the kettle
cools below the set temperature, the thermostat
switch closes and starts another heating cycle.
On-off cycling continues and maintains the
kettle at the desired temperature.

5.2.6 To Empty Kettle

5.2.6.1 DH and DHT Kettles

To tilt the body of the kettle forward, turn the
hand crank on the front of the cabinet anti­clockwise. The body will stay in the position it
holds when you stop turning the handle. To
return the body to the upright position, turn the
crank clockwise.

5.2.6.2 DHT Kettle Only

Turn the handle on the tangent draw-off valve
anti-clockwise. After approximately 3-1/2 turns
the valve handle can be pulled forward so that
full flow is achieved. To close the tangent
draw-off valve, push the handle inward until the
threads on the valve stem engage. Turn the
handle clockwise until the valve is closed. Do
not over-tighten since over-tightening may
damage the valve seat.

WARNING
DO NOT STAND IN FRONT OF THE KETTLE
BODY WHEN TILTING IT. BE CAREFUL TO
KEEP HOT CONTENTS FROM SPILLING.
ENSURE PEOPLE ARE KEPT AWAY FROM
THE KETTLE WHEN EMPTYING THE
KETTLE.

5.2.7 Power Failure

If the power to the unit fails do not attempt to
operate the appliance until the electricity supply
is re-established.

When the power comes back on follow the
steps in Paragraph 5.2.1 Initial Kettle Lighting
and Operational Readiness Check.

24 OM/SM-DH CE

OM/SM-DH-CE

5.3 Cleaning and Maintenance

CAUTION
DISCONNECT THE ELECTRICITY SUPPLY BEFORE ANY CLEANING IS UNDERTAKEN. THE
APPLIANCE MUST NOT BE CLEANED WITH A JET OF WATER OR STEAM CLEANED.

5.3.1 Suggested Tools

a) Detergent and sanitizing agent, or a

combination cleaning - sanitizing agent.

b) Long handled and short handled kettle

brushes.

5.3.2 Precautions

Before cleaning, shut off the burner by turning
the thermostat dial to "OFF". If water or
cleaning/sanitizing solution will be sprayed,
shut off all electric power to the unit at a remote
switch such as the circuit breaker.

WARNING
KEEP WATER AND SOLUTIONS OUT OF
CONTROLS, GEARS AND BURNERS.
NEVER SPRAY OR HOSE THE CONTROL
CONSOLE, ELECTRICAL CONNECTIONS,
TILTING MECHANISM OR CABINET.

5.3.3 Procedure

a) Clean all food contact surfaces as soon as

possible after use, preferably while the
kettle is still hot. If the unit is in continuous
use, thoroughly clean and sanitise both
interior and exterior at least once every 12
hours

b) Scrape and flush out large amounts of food

residues. Be careful not to scratch the
kettle with metal implements.

c) Prepare a hot solution of the detergent or

cleaning compound as instructed by the
supplier. Clean the unit thoroughly. A cloth
moistened with cleaning solution can be
used to clean controls, control housings
electrical conduit, etc.

d) Rinse kettle and draw-off parts thoroughly

with hot water, then drain completely. Keep
draw-off parts together. They are not
interchangeable.

e) When you reassemble the draw-off valve

hand tighten only.

f) As part of the daily cleaning program, clean

all external and internal surfaces that may
have been soiled. Remember to check
such parts as the underside of the kettle
and the control housing.

g) To remove materials stuck to the

equipment, use a brush, sponge, cloth,
plastic or rubber scraper, or plastic wool
along with the detergent solution. To
minimize the effort required in washing, let
the detergent solution sit in the kettle and
soak into the residue, or heat the detergent
solution briefly. Do not use any abrasive
materials or metal implement that might
scratch the surface. Scratches make the
surface hard to clean and provide places
for bacteria to grow. DO NOT use steel
wool, which may leave particles imbedded
in the surface and cause eventual corrosion
and pitting

h) The exterior of the unit may be polished

with a recognized stainless steel cleaner or
with hot water and detergent.

i) When the equipment needs to be sanitized,

use a sanitizing solution equivalent to one
that supplies 200 parts per million available
chlorine. Obtain advice on the best
sanitizing agent from your supplier of
sanitizing products. Following the suppliers
instructions, apply the sanitizing agent after
the unit has been cleaned and drained.
Rinse off the sanitizing agent thoroughly.

CAUTION
LEAVING A CHLORINE SANITIZING AGENT
IN CONTACTWITH STAINLESS STEEL FOR
MORE THAN

30 MINUTES CAN CAUSE

CORROSION.

j) It is recommended that the unit be sanitized

before use.

k) 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, such as
GroenDelimer Descaler (P/N 114800) or
LimeAway from Eco Lab Inc., in
accordance with the manufacturer's

OM/SM-DH CE 25

OM/SM-DH-CE

directions. Rinse and drain the unit before
further use.

l) If especially difficult cleaning problems

persist, contact your cleaning product
supplier for assistance.

5.3.4 Safety Precautions

A stopcock will be fitted in the gas pipe
supplying the appliance. The user must be
familiar with its location and operation to turn it
off in an emergency. If there is a smell of gas,
turn off the gas, ventilate the area and call the
gas supplier. Do not search for gas leaks with
naked flames.

5.3.5 Service-Periodic Maintenance

A Maintenance and Service Log is attached.
Each time maintenance is performed on your
Groen equipment, enter the date on which the
work was done, what was done and who did it.
File the log with the warranty. Periodic
inspection can minimize equipment down time
and increase the efficiency of operation. The
following points should be checked regularly:

a. The pressure/vacuum gauge should show a

vacuum of 20 to 30 inches when the kettle
is cold. If it does not, the unit requires
servicing.

b. The jacket water level should be between

the gauge glass marks. If it is not, the unit
requires servicing.

c. Keep electrical wiring in good condition.

26 OM/SM-DH CE

OM/SM-DH-CE

Parts List

OM/SM-DH CE 27

OM/SM-DH-CE

Parts List

Key Description Part No. Key Description Part No.

1 Foot, Adjustable Bullet 013275 22 Label, Wiring Diagram 113077
2 Light, Indicator, Amber 220 VAC 116382 23* Burner & Flame Sensor Assembly
3 Switch, Toggle DPST 122004 23a* Burner & Flame Sensor Assy DH-20 117016
4 Label, Indicator Lights 113076 23a1* Burner Assy w/Manifold (DH-20 G20) 160362
5 Label, Operating Instructions 113075 23a2* Burner Injector (DH-20 Nat Gas G-20) 107122
6 Light, Indicator, Red 220 VAC 116381 23a3* Burner Injector (DH-20 Nat Gas G-25) 127557
7 Switch, Push Button (Momentary) 122003 23a4* Burner Injector (DH-20 PropGas G-31) 127564
8 Knob, Thermostat 122000 23b* Burner & Flame Sensor Assy DH-40 117015

9 Thermostat 009730 23b1* Burner Assy w/Manifold DH-40 G20 160364
10 Screw, Rnd Hd Mach #6-32 x 3/8” 009697 23b2* Burner Injector (DH-40 Nat Gas G-20) 102943
11 Thermostat Adapter 107172 23b3* Burner Injector (DH-40 Nat Gas G-25) 102943
12 Water Fill and Safety Valve Assly 097008 23b4* Burner Injector (DH-40 PropGas G-31) 127555

12a Valve, Safety 097005 23c* Burner & Flame Sensor DH-60 117014
12b Valve, Check 004187 23c1* Burner Assy w/Manifold DH-60 G20 160366
12c Valve, Gate 004180 23c2* Burner Injector (DH-60 Nat Gas G-20) 068964

13 Flue Stack Assembly DH-20 117039 23c3* Burner Injector (DH-60 Nat Gas G-25) 102945
13 Flue Stack Assembly DH-40 117034 23c4* Burner Injector (DH-60 PropGas G-31) 127555
13 Flue Stack Assembly DH-60 117030 23d* Igniter/Sensor Bracket Assembly 117003
14 Tilt Gear Mechanism Assembly 045752 23e* Spark/Sensing Probe 003328

14a Key, 3/8" Sq x 1-3/8" lg 001474 24 Wire Harness
14b Screw, hex hd ½ 13 x 1-1/2 008679 24a Wire Harness, Main 122045
14c Nut, hex 1/2"-13 005705 24b Wire Harness, Igniter & Sensor 122044
14d Washer, lock, 1/2" 005735 25 Gas Inlet Adapter ½ BSPT x ½ NPT 116392
14e Housing, Bearing Assy 009762 26 Water Level Probe 015589

14f Bearing Ball 009765 31 Pilot Ignition Control 113060
14g Gear, Worm 012026 32 Bracket, Gas Supply Piping 117025
14h Pin, Roll, 1/4" dia x 1" Lg 012614 40 Gasket, “U” Groove 007937

14i Ring, Retaining, Internal 1 - 3/4" 013483 41 Bottom Cover (DH-20) 049799

14j Gear, 92 T, 3" Bore 013609 41 Bottom Cover (DH-40, 60) 090630
14k Handle, Crank ¾ “ Bore 013617 43 Screw, truss head #10-32 x 1/2" lg 072189

14l Shaft, Handle, 3/4" x 13-1/2" 013624 45 Gas Test Nipple 117051

14m Spacer, 3" 013625 46 Nut Hex #8-32 002632

15 Faucet Bracket 009054 47 Water Level Switch Assy 097075
17 Equipotential Assembly 122021 48 Water Level Electrode 074665

18 Electrical Panel Assembly 122024 49 Boot Electrode 010390
18a Relay, Water Level Sensor 117737 50 Pressure Switch 108559
18b Base, Water Level Sensor Relay 117738 - Water Treatment Kit 110324
18c Terminal Block 003888 - TDO Replacement Parts
18d Panel, Electrical 122037 - Valve Stem 009048
18e Holder, Fuse 3 AG 077854 - Bonnet 009047

18f Fuse, 3 AMP, Fast Blow 079965 - O-Ring 009034

19 Hex Keps Nut ¼-20 012940 - Hex Nut 009354

21 Gas Piping Assy DH-20 (See Pg 30) 122048 - Handle 009029

21 Gas Piping Assy DH-40 (See Pg 30) 122025 - Wing Nut 009028

21 Gas Piping Assy DH-60 (See Pg 30) 122074

*NOTE: See Paragraph 1.10 (Page 7) for permissible conversions.

28 OM/SM-DH CE

OM/SM-DH-CE

Parts List, Continued

Gas Valve and Piping Assembly

Key Description Part No. Key Description Part No.

21 Gas Piping Assy i Nipple, 1/2" NPT x 8-1/2 BI 003943

a Elbow, 90 deg. 1/2" NPT BI 008747 j Screw, M5x10mm Lg, Phillips Pan hd 116388
b Nipple, Close, 1/2" NPT x 1/2" BSPT 116394 k1 Nipple, 1/2" NPT x 11" BI 005673
c Bracket, Mounting, Gas Valve 122014 k2 Nipple, 1/2" NPT x 13" BI 005674
d Valve, Gas (G20/G25 Gas) 114505 l1 Nipple, 1/2" NPT x 5-1/2" BI 010234
e Elbow 90 Deg Union, 1/2" NPT BI 005495 l2 Nipple, 1/2" NPT x 7" BI 005556

f Nipple 1/2" NPT x 4-1/2 BI 008569 l3 Nipple, 1/2" NPT x 9" BI 027224
g Swivel Joint 001155 m Nipple, 1/2" NPT x 2-1/2" BI 005552
h Coupling, Full 1/2" NPT BI 005722 n Fitting, 1/2" NPT x 5/8" tube 049093

OM/SM-DH CE 29

30 OM/SM-DH CE

OM/SM-DH-CE

Service Log

Model m _______________________________ Purchased From _________________________

Serial m _______________________________ Location ________________________________

Date Purchased __________________________ Date Installed ___________________________

Purchase Order m ______________________ For Service Call __________________________

Date Service Performed Performed By

OM/SM-DH CE 31

OM/SM-DH-CE

Service Log

Model m _______________________________ Purchased From _________________________

Serial m _______________________________ Location ________________________________

Date Purchased __________________________ Date Installed ___________________________

Purchase Order m ______________________ For Service Call __________________________

Date Service Performed Performed By

32 OM/SM-DH CE

OM/SM-DH-CE

Service Log

Model m _______________________________ Purchased From _________________________

Serial m _______________________________ Location ________________________________

Date Purchased __________________________ Date Installed ___________________________

Purchase Order m ______________________ For Service Call __________________________

Date Service Performed Performed By

OM/SM-DH CE 33

OM/SM-DH-CE

Service Log

Model m _______________________________ Purchased From _________________________

Serial m _______________________________ Location ________________________________

Date Purchased __________________________ Date Installed ___________________________

Purchase Order m ______________________ For Service Call __________________________

Date Service Performed Performed By

34 OM/SM-DH CE

Limited Warranty To Commercial Purchasers*

(for Areas Outside of the U.S. and Canada)

Groen Foodservice Equipment ("Groen Equipment") has been skillfully manufactured, carefully inspected and
packaged to meet rigid standards of excellence. Groen warrants its Equipment to be free from defects in
material and workmanship for (12) twelve months from date of installation or (18) eighteen months from date
of shipment with the following conditions and subject to the following limitations.

I. This parts warranty is limited to Groen Equipment sold to the original commercial purchaser/users

(but not original equipment manufacturers), at its original place of installation, in areas outside the
U.S. and Canada.

II. Damage during shipment is to be reported to the carrier, is not covered under this warranty, and is

the sole responsibility of the purchaser/user.

III. Groen, or an authorized service representative, will repair or replace parts, at Groen's sole election,

for any Groen Equipment, including but not limited to, drawoff valves, safety valves, gas and electric
components, found to be defective during the warranty period.

IV. This warranty does not cover boiler maintenance, calibration, or periodic adjustments as specified in

operating instructions or manuals, and consumable parts such as scraper blades, gaskets, packing,
etc., or labor costs incurred for removal of adjacent equipment or objects to gain access to Groen
Equipment. This warranty does not cover defects caused by improper installation, abuse, careless
operation, or improper maintenance of equipment. This warranty does not cover damage caused by
poor water quality or improper boiler maintenance.

V. THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED

OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE, EACH OF WHICH IS HEREBY EXPRESSLY DISCLAIMED. THE
REMEDIES DESCRIBED ABOVE ARE EXCLUSIVE AND IN NO EVENT SHALL GROEN BE
LIABLE FOR SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES FOR THE BREACH OR
DELAY IN PERFORMANCE OF THIS WARRANTY.

VI. Groen Equipment is for commercial use only. If sold as a component of another (O.E.M.)

manufacturer's equipment or if used as a consumer product, such Equipment is sold AS IS and
without any warranty.

* (Covers All Food Service Equipment Ordered After October 1,1995)

OM/SM-DH CE 35

1055 Mendell Davis Drive • Jackson MS 39272

888-994-7636 • 601-372-3903 • Fax [phone]

groen.com

PART NUMBER 128417, REV. D (6/06)