Groen TDH-CE Mark Operation Manual
P
IMPORTANT INFORMATION P KEEP FOR OPERATOR P IMPORTANT INFORMATION
OPERATOR AND SERVICE MANUAL OM/SM-TDH-CE
Part Number 128418 INTERNATIONAL
Model: TDH-CE Mark
Steam Jacketed Kettle
Self-contained
Stainless Steel
Gas Heated
Table Mounted
Tilting
P
Pull Tilt Model Crank Tilt Model
KEEP THIS MANUAL WITH KETTLE DOCUMENTS. OPERATORS AND
TECHNICIANS SHOULD READ, UNDERSTAND AND FOLLOW WARNINGS AND
INSTRUCTIONS IN THIS MANUAL (THE SERVICE MANUAL AND THE OPERATOR
SECTIONS).
OM/SM-TDH-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 WILL, BY NECESSITY, 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.
OM/SM-TDH-CE
TABLE OF CONTENTS
Section Page
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.7 Total Gas Rate - Natural & Propane Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.8 Injector Diameters-Natural and Propane Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.9 Gas Pressure 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.10 ON/OFF Switch and Reset Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.11 Removal of Neons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.12 Removal of Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.13 Removal of Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.14 Low Water Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.15 Removal of the Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.16 Removal of Pilot Assembly/Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.17 Spark Electrode/Flame Sensing Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.18 Removal of Pressure Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.19 Removal of Sight Glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.20 Safety Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.21 Filling Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.22 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 User Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Equipment Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 Lighting and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Cleaning and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Electrical Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Service Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3
OM/SM-TDH-CE
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 has been provided in the Maintenance & Service Log in the User
Instructions section (Page 23). Keep it up-to-date and on file.
4
OM/SM-TDH-CE
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• TDH - 20 TDH - 40
WIDTH mm (in)
DEPTH mm (in)
HEIGHT mm (in)
WEIGHT kg (lbs)
610 (24.0) 685 (26.9)
800 (31.5) 830 (32.6)
645 (25.4) 725 (28.5)
98 (215) 110 (240)
1.2 Siting
The appliance should be installed on a level table
top 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.
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.
Equipment
Units Type
Range
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
Ventilation Rate Required
m3 / min ft3 / min
17 600
8.5-14 300-500
1.5 Electrical Supply
1.4 Ventilation
The unit must be installed in an adequately
ventilated room with provision for an adequate air
supply to the unit. The area directly around the
appliance must be cleared of combustible material.
For multiple installations, 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 following table.
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. The wiring must be
executed in accordance with the regulations listed in
this manual.
Cable entry is at the lower rear on right side of the
appliance. Access to the terminals is gained by
removing relevant panels. (Paragraphs 3.5.1 and
3.5.2)
Provide 230 VAC, 50 Hz, 1 Phase, 1 Amp or 40
Watts. The electrical schematic is located in the
service compartment and in this manual.
WARNING
THIS APPLIANCE MUST BE EARTHED.
5
OM/SM-TDH-CE
1.6 Gas Supply
Incoming gas 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 any other gas equipment installed.
The appliance governor is incorporated in the gas
control valve which is situated in the control cabinet.
The control valve governor is suitable for both
natural and propane gases without any 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”BSPT).
An isolating cock must be located close to the
appliance to allow shut off during an emergency or
servicing. The installation must be tested for gas
soundness and purged as specified in IGE/UP.
1.8 Injector Diameters-Natural and
Propane Gas
Injector TDH-20 TDH-40
G20 Nat. Gas 0.94 mm 1.09 mm
No. of Orifices 8 12
G25 Nat. Gas 1.09 mm 1.19 mm
No. Of Orifices 8 12
G31 Propane
Gas
No. of Orifices 8 12
Pilot Orifice : NATURAL - Honeywell CAR 24;
PROPANE -Honeywell BBR 10
0.57 mm 0.66 mm
1.9 Gas Pressure Adjustment
A pressure test point is fitted on the burner manifold
and on the gas control valve.
TDH-20 TDH-40
G20, G25
NATURAL
GAS
G31
PROPANE
GAS
mbar 8.75 8.75
in. w.c. 3.5 3.5
mbar 25 25
in. w.c. 10 10
1.7 Total Gas Rate - Natural and
Propane Gas
Model Kw BTU/hr
TDH-20 8.2 28,000
TDH-40 14.3 48,800
Water Supply — Not applicable to these appliances.
NOTE: With reference to the gas rate, pressure
adjustments and conversions, this appliance is
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.
6
2. Assembly and Commissioning
OM/SM-TDH-CE
2.1 Assembly
a) Unpack the appliance
b) Place on a firm, level table.
2.2 Gas Supply
Connect the unit to the gas supply and test for gas
soundness. For that part of the integral 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 PAN CONTAINS LIQUID
WHEN THE BURNERS ARE ALIGHT.
2.3 Electrical Supply
Before commissioning the appliance, ensure that the
electrical installation has been carried out according
to relevant regulations. (Paragraph 1.5.).
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 it is not, turn
the elbow to the correct position.
2.5.1 Lighting Sequence
Initial Start Up:
a) Put a small amount of water in the 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 the spark igniter lights the burners.
WARNING
THIS APPLIANCE MUST BE EARTHED.
2.4 Jacket Water Level/Jacket
Pressure
a) Ensure that the jacket water level is correct by
confirming that the level is in the middle of the
sight glass. If the water is low, follow the
instructions under "Jacket Filling" (Paragraph
3.3).
b) Check the pressure gauge. If the gauge 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).
f) If the unit does not light, the unit will lock-out.
Turn the unit off and wait 1-2 minutes before
attempting to switch the unit on again.
g) Press reset lock-out switch and repeat steps (b)
to (e).
h) To turn the 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 suitable pressure gauge must
be connected to the pressure test point on the
gas control valve or the gas manifold. See below
for test points on the gas control valve.
7
OM/SM-TDH-CE
When checking pressure at test points on the gas
valve, undo the screw a half turn and slip tube over
nipple.
b) Turn the gas and electricity mains on.
i) Disconnect the pressure gauge from the test
point.
j) Re-seal the pressure test point and test for gas
soundness. Replace in reverse order.
2.5.3 Checking Performance of Controls
a) Light the unit as described in Paragraph 2.5.1.
Check that the controls produce a healthy spark
from the electrode to the earthing post and
ignition is smooth and without delay.
b) Turn thermostat off and then on. Check that
burners go out when the thermostat is switched
off and then ignite smoothly and without delay
when switched back on. Repeat several times.
c) If the unit fails to respond as detailed above it
should be serviced by an authorized Groen
service agent.
c) Light the burners (Paragraph 2.5.1).
d) Remove control cabinet lid (Paragraph 3.5.1).
e) Remove control cabinet side panel (Paragraph
3.5.2).
f) Remove governor cap screw on gas control
valve. See figure below for position.
g) Governor is suitable for natural or propane gas.
h) To increase pressure turn screw inside the
governor turret clockwise or anti-clockwise to
reduce pressure. Check the burner pressure
again after 15 minutes of operation and adjust if
necessary.
2.6 Instruction to User
Important
After installing and commissioning the
appliance, the user's instructions should be
handed to the user or purchaser. Ensure that
instructions for lighting, turning off, correct use
and cleaning are properly understood. Emphasis
should be made with regard to the location of the
main gas isolating valve and the emergency
shut-down procedure should be demonstrated.
8
3. Servicing and Conversion
OM/SM-TDH-CE
Important
Before attempting any servicing, ensure that the
gas isolating cock is turned off and cannot be
inadvertently turned on. Disconnect the
electricity supply.
After any maintenance task, check the appliance
to ensure that it performs correctly. Carry out
necessary adjustments as detailed in Section 1.
After any servicing or exchange of gas carrying
components:
ALWAYS CHECK FOR GAS SOUNDNESS
NOTE: When replacing wiring connections refer to
the wiring diagram contained on the unit and in 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).
on the gear housing until grease flows out of the
bearings around the shaft. Put a liberal amount of
grease on the gear to cover the arc of contact with
the gear.
Safety Valve
At least twice monthly the safety valve requires
checking to ensure that it works correctly. With the
gauge pressure at about five PSIG, lift the valve level
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.
Relevant safety procedures and requirements should
also be explained to the user when carrying out the
procedure.
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. 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 could distort or increase the
orifice size and should be avoided.
Gears
The gear housing has fittings for lubrication of
moving parts. Because the gears do not run in oil,
periodic lubrication with grease is necessary.
Lubrication frequency depends on operating
conditions, but should be performed at least once
every six months. A #2 grade LGI lithium grease is
recommended. Add grease through the Zerk fittings
3.1 Conversion
See Paragraphs 1.8 and 1.9 for important
information about gas conversion. Verify the
type of gas to be used. All conversions must be
for approved gas in countries listed in Paragraph
1.9.
To change from natural gas to propane gas or vice
versa change
Burner Injector
Pressure Setting
Data Plate
Pilot Orifice
The governor spring does not require changing, only
the pressure setting.
IMPORTANT
This appliance was fitted with gas injectors for
type G20 natural gas at the factory. 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 gas size marking on the injector matches
9
OM/SM-TDH-CE
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 near zero on the pressure vacuum gauge
indicates excess 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 five PSIG, release
entrapped air and steam by lifting the lever on
the safety valve for about one second. Repeat
this a few times. Let the valve snap back into the
closed position.
filling must be removed to obtain efficient heating
(Paragraph 3.2).
CAUTION
TDH STEAM JACKETED KETTLES ARE
DESIGNED TO USE TREATED, DISTILLED
WATER ONLY. USE OF ANY OTHER WATER
CAN CAUSE LIME ACCUMULATION ON
INTERNAL SURFACES, AND WILL VOID ALL
WARRANTIES.
3.4 Water Treatment Procedure
WARNING
READ AND FOLLOW ALL PRECAUTIONS
STATED ON THE WATER TREATMENT
COMPOUND LABEL TO AVOID INJURY.
a) Fill the mixing container with the measured
amount of water required (See Table below).
Use distilled water only.
b) Hang a strip of pH test paper on the rim of the
container, with about 1"(25 mm) of the strip
below the water surface.
WARNING
AVOID ANY EXPOSURE TO THE STEAM
BLOWING OUT OF THE SAFETY VALVE.
3.3 Jacket Filling
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 water was lost as steam during venting or
by draining.
To add water:
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 (Paragraph 3.4).
b) Let the kettle cool completely. Turn the safety
valve elbow anti-clockwise (to avoid thread
damage) until it faces upward.
c) Open the globe valve and pour distilled or
treated water into the elbow inlet.
c) Measure the water treatment compound (e.g.,
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 used in the future. However, it is
advisable to check the pH every time water is
prepared. For optimum performance, use
correctly treated distilled water.
Model Kettle Capacity Jacket Capacity
TDH-20
TDH-40
18.9 Litres 6.6 Litres
37.9 Litres 8.5 Litres
d) Hold the safety valve open while you pour to let
air escape from the jacket. Air introduced during
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