puri Gas Fired Tandoori Oven User manual

www.PuriTandoors.co.uk | ‘The Tandoor Clay Oven Ltd’ ta/ PURI Tandoors in UK
Gas$Fired$Tandoor$Instruction$Manual$ $ Manual$Rev.$October$2019$
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Gas$Fired$Tandoori$Oven$
Instruction$Manual$

Gas$Fired$Tandoor$Instruction$Manual$ $ Manual$Rev.$October$2019$
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GAS$FIRED$TANDOOR$OVEN$
INSTALLATION$AND$OPERATOR$INSTRUCTION$MANUAL$
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RETAIN$THIS$MANUAL$FOR$FUTURE$REFERENCE:$ASSEMBLER$/$INSTALLER:$Leave$these$
instructionswith$the$appliance.$A$copy$of$these$boxed$instructions$is$to$be$posted$in$a$prominent$
location$and$theinstructions$are$to$be$followed$in$the$event$the$user$or$area$occupant$detects$gas$
odours.$
FOR$YOUR$SAFETY:$
1. Do$not$store$or$use$gasoline$or$other$flammable$vapours$
or$liquids$in$the$vicinity$of$this$or$any$other$appliance.$
2. A$qualified$installer$must$perform$installation$and$service$
WARNING:$Improper$installation,$adjustment,$alteration,$service$or$maintenance$
can$cause$property$damage,$injury$or$death.$Read$the$installation,$operating$and$
maintenance$instructions$thoroughly$before$installing$or$servicing$this$equipment.
WARNING:$If$you$smell$gas$
1.$Shut$off$gas$to$the$appliance.$
2.$Extinguish$any$open$flames.$
3.$Do$not$try$to$light$any$appliance.$
4.$Do$not$touch$any$electrical$switch;$do$not$use$any$phone$in$your$building.$
5.$Immediately$call$you$gas$supplier$from$a$neighbour’s$phone.$Follow$the$gas$
$$$$supplier’s$instructions.$
6.$If$you$cannot$reach$your$gas$supplier,$call$the$fire$department.

Gas$Fired$Tandoor$Instruction$Manual$ $ Manual$Rev.$October$2019$
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Contents'
1. Quick guide on getting started ......................................................................................... 3
2. Introduction .................................................................................................................... 3
3. Consequential Loss .......................................................................................................... 4
4. Installation introduction .................................................................................................. 5
4.1. Unpacking ............................................................................................................................. 6
4.2. Clearance and Positioning ...................................................................................................... 6
4.3. Ventilation ............................................................................................................................ 7
4.4. Gas supply and connection .................................................................................................... 7
4.5. Start up and operation .......................................................................................................... 8
5. User instructions ............................................................................................................. 9
5.1. Application of the oil ........................................................................................................... 10
5.2. First firing ............................................................................................................................ 10
5.3. Shutting down of the appliance ........................................................................................... 11
6. Maintenance and cleaning of appliance .......................................................................... 11
6.1. Servicing .............................................................................................................................. 11
6.2. General check ...................................................................................................................... 12
7. Component Replacement ............................................................................................... 12
7.1. Thermocouple ..................................................................................................................... 12
7.2. Ignite Electrode ................................................................................................................... 13
7.3. Pilot Burner ......................................................................................................................... 13
7.4. Gas Tap Assembly ................................................................................................................ 13
7.5. Burner ................................................................................................................................. 13
7.6. Injector/Orifice Spud ........................................................................................................... 13
8. Technical Data ................................................................................................................ 14

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1. Quick'guide'on'getting'started''
Adjusting the shutter: There is an adjustable shutter at the left side (bottom) of the front box. This
is used to regulate airflow to achieve optimum & even heat from the burner. Please see the video
below https://youtu.be/bh-ulCvDaks
Curing the Clay
Application of the Tandoor Oil: 1 x small jar of oil is provided with the tandoor, please add plain
yogurt to it in equal amount and apply it on the clay walls with a cloth or paint brush. Let it dry for
an hour and proceed with the first burn
First Burn: This is the most important step in curing/baking the clay, this should be followed
properly as per instructions below for long life of the clay liner
With lid on, the first burn should be done on low gas (9 o’clock position of knob) for approx. 8-10
hours.
After the first burn set the burner to medium gas (11 o’clock position of knob) on same day or the
next day and let it burn for another 8-10 hours.
Finally the tandoor burner should be set on high gas (12 o’clock position of knob) for another 8-10
hours on the same day or the next day.
The clay walls will turn terracotta red after firing the tandoor for approx 25-30 hours after which the
tandoor will be ready for cooking
Salt water wipe: This is to be done every other day before starting the tandoor or whenever the
nan/roti is not sticking properly to the clay walls or the dough gets stuck on the clay walls. Put 3-4
table spoons of salt in glass of water, apply it on the clay walls with a piece of cotton cloth after
squeezing out the excess water.
2. Introduction'
We provide tandoors of the highest quality using premium quality metal, component parts and clay.
All of the our meet the highest safety standards laid down by the European safety advisory board.
This product is for professional use and must only be operated by suitably trained personnel.
Its unique hygiene design makes the product extremely easy to clean and safe to use. As there are
no exposed joints, the housing presents a flush surface that simplifies cleaning.

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Please read the entire manual and follow all pertinent instruction when assembling, installing and
operating this appliance. The manual should be retained for future reference. Please post in
prominent location instructions to be followed in the event user smells gas.
Ø Do not store or use flammable vapours or liquids in the vicinity of this or not any other
appliance.
Ø Whilst in operation, parts of the appliance will become hot. Suitable precautions must be
taken to avoid accidental burns.
Ø Keep all combustible products away from the Tandoor.
Ø This is gas fired Tandoor ONLY. No charcoal uses. The oven must not be exposed to rain
/water
Ø Keep at least 6” (150mm) away from any other equipment.
Ø Must be installed by a technically qualified technician.
Ø At all times keep this manual in the vicinity of the oven.
Warning: improper installation, adjustment, alteration, service or maintenance can cause
property damage, injury or death. Read the following installation, operation and maintenance
instructions thoroughly before installing or servicing this equipment.
Continuous product improvement is a policy of The Tandoor Clay Oven Limited. Specification and
designs are subject to change without notice.
3. Consequential'Loss'
Puri Tandoors does not accept responsibility for loss of food, production time, production time,
profit etc, which may result from the breakdown of the appliance.
Models of this tandoori oven are suitable for installations in UK &, EU
UK & Europe designated appliances are suitable for use on natural gas / LPG and can be used with
either Natural gas / LPG
This appliance must be installed in accordance with current local regulations and only used in a well-
ventilated area.

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4. Installation'introduction'
This product is made with the safest materials conforming to the relevant CE directives. Proper
installation must conform to all local codes. Within Europe, appliances should be in installed in
accordance with BS6173: 2009code of practice for installation of gas catering appliances, taking into
account Gas Safety (Installation and Use) Regulations 1998 Approved Code of Practice and guidance
and Health and safety at Work Act 1974.
BEFORE STARTING WITH THE INSTALLATION OF THE APPLIANCE, PLEASE READ AND BE FAMILIAR
WITH THE INFORMATION IN THIS MANUAL
Installation of this must be performed by a registered gas –safe enginner / a qualified installer.
• Appliance installation sites should be provided with safety instructions based on
information supplied by local fuel suppliers. These instructions are to be posted in a
prominent area near the appliance.
• All installations are to conform to local codes. In the absence of local codes, installation
should conform to - For UK & Europe with BS6173: 2009 code of practice for installation of
gas catering appliances
• The appliance and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at pressures in excess of psi
(3.45kPa).
• The appliance must be isolated from the gas supply piping system by closing its individual
manual shutoff valve during any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psi (3.45 kPa). In Europe a gas soundness test must be
carried out.
• The rear panel on the tandoor oven has a fastener location suitable for attachment of
restraint devices. The fastener is identified with a marking tag.
• Do not allow untrained operators to use this equipment.
• Exercise extreme care in handling metal parts. Do not touch any metal or other surfaces
that become hot in operation.
• NO ATTEMPT SHOULD BE MADE TO OPERATE THIS APPLIANCE DURING AN ELECTRICAL
POWER FAILURE. In the event of the loss of electrical power, exhaust hood will not
function. If this happens turn off the hood power switch and turn off the gas tandoor oven
valve (s).
• IF INSTALLATION SITE IS PROVIDED WITH A POWER LOSS INTERLOCK DEVICE, IT WILL ACT
TO SHUT OFF ALL GAS IN THE EVEN OF ELECTRICAL POWER FAILURE. FOLLOWING LOSS OF
POWER MANAUL RELIGHT OF PILOT BURNER WILL BE REQUIRED.

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• Refer to local codes for the building fresh air supply requirements in your respective
country.
• Note: Where servicing may require greater access clearances than those shown on the
nameplate, then the greater clearances should be allowed for.
• At installation, adequate clearances should be provided for proper operation and servicing
of theappliance and any field installed optional items. Data plate applies only to tandoor
oven as provided by appliance manufacturer
• This appliance is for installation only at the clearances indicated on the name plate.
Clearances are specified from combustible and for non-combustible construction.
• Observe clearances from combustible surfaces as marked on nameplate. Clearances
postedon unit are for safety reasons and lesser clearances cannot be applied. Additional
clearancesmight be required for service and operator access.
• Do not block any louvered openings on appliance service panels.
4.1. Unpacking'
• Un- crate the unit with extreme care, do not use a hammer or heavy tools to un-
crate the unit. Always remove shipping container parts and panels by only outward
prying.
• Make sure the unit is in the upright position before starting to un- crate.
• Before fixing the appliance in place, remove all protective plastic coating from the
unit.
• Oven is on 4” (100mm) wheel castors and can be rolled out easily to the designated
installation area.
• Unit must be rolled around by hand. Do not use a lift jack.
4.2. Clearance'and'Positioning'
• This appliance requires a 6” (150mm) clearance from combustible and non-
combustible material and surfaces.
• Never install propane appliances below grade.
• A clear space, (rear clearance) of at least 6” (150mm) should be maintained at the
rear and sides of the appliance.
• There must be minimum clearances of 750 mm in Europe, between top of the
appliance and any overhanging shelf. Shelves must be of non-combustible material.
• It is recommended that the appliance is not installed in draughty locations or near
doors.

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• If the appliance is positioned on a combustible floor, sheet material (preferably
stainless steel) equal to the base area of the appliance must be secured to the floor
prior to fixing the appliance in place.
• Ensure that the appliance is level.
• Inspect for damage. If any damage is noted, report damage to the freight company
and contact manufacturer at the address shown on the cover.
• Verify that the unit marking plate indicates that the unit is set up for service on the
type of gas fuels as found at the installation site. Natural gas units have to be
operated on natural gas only and propane units used only on propane gas.
• Plan location of units in such a manner as to be best accessible to operator. Locate
unit so that foot traffic in area will not interfere with unit operation. When choosing
unit location, take into consideration the operation of overhead and side mounted
heating/cooling ducts and fans
4.3. Ventilation'
• The area in which the appliance is to be installed should have sufficient fixed
ventilation to comply with the requirements of Approved Document J in the 1985
Building Regulations in Europe, with a minimum area of 4.5 cm per 1Kwht (3412Btu
per hr) of total heat input.
• Ventilation hood must be installed above the appliance according to all appliance
codes by your local and state health and fire regulations.
• It is required that the Tandoor be interlocked to the hood ventilation system.
• There must be sufficient low- level ventilation to ensure that the appliance has a
good supply of clean fresh air.
4.4. Gas'supply'and'connection'
• Check that the gas supply correspondence to that on data plate. Gas connection
must be the same size of the PURI Tandoors, BSP ½”. Warning: Do not under any
circumstances join NPT to BSP threads when making connections.
• The ½” connection for connection of gas supply is located behind the unit.
• A shut off valve should be installed on the gas service line ahead of the unit in case
of emergency and for serving purposes. The location of the manual shutoff valve
should comply with codes in effect at the installation site.
• Since the appliance is caster mounted, connection of the appliance must be made
using suitable flexible connection devices. Ensure that the hose is suitable for
commercial catering appliances and a restraining wire and wiring label are used.

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• Fixed pipe work must not be used with this appliance.
• Connect tandoor to gas supply and conduct gas leakage tests to verify gastight
connections. Check entire piping system for leaks. A solution consisting of 50%
dishwashing detergent and water mix can be applied to all piping parts with a brush.
• Matches, candles or other sources with open flames or sparks shall not be used for
this purpose. Gas controls are provided with outlet settings suitable for the fuel type
shown on the nameplate. Adjustments if needed to the regulator should only be
made by qualified service staff. The regulator outlet pressure must be the pressure
shown on the nameplate for the type of gas fuel used.
• Some local codes require that a manual shutoff valve be installed in the same room
and within six feet of the appliance. If because of local code requirements, a manual
gas shutoff valve has to be installed on the appliance, and if it is mountedinside of
enclosure by access doors, a label should be provided indicating this construction.
• Proper gas piping: In order to ensure proper performance of this unit as well as
other gas appliances on the same gas supply lines, a well-planned and properly sized
gas supply system is a must. If the appliances are to be connected to existing piping,
the piping should be checked for adequate capacity enabling full firing for all of the
units that are to use the piping run.
• Pipe thread sealant (joint compound) shall be used sparingly and only on male
threads of pipe joint. Such compounds shall be resistant to the action of L.P. gases.
WARNING: All pipefittings must be clean and free of dirt or other contaminants. Any
loose particles, such as dirt or metal filing, in gas lines can damage the controls and
affect operation.
• Make certain not to obstruct the flow of combustion and ventilation air. Ensure that
air intake openings around the appliance jacket are not obstructed.
• Appliance must be connected to suitable exhaust duct in compliance with all
applicable local codes.
• Position the appliance to ensure that proper clearances for safety and service are
provided.
4.5. Start'up'and'operation'
All appliances are operationally checked and adjusted before leaving our factory. These
adjustments are made to verify effective operation and that the appliance meets the
requirements of the test’s standards. At the installation site making sure all local codes
aremet is the responsibility of the installer.

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Puri Tandoors uses a safety pilot system to ignite the burner and monitor flames and to
shut off the gas supply in case of loss of burner or pilot flames. The gas supplies tothe
pilot and burner are fed through a thermo- magnetic safety valve. A thermocoupleis
part of the safety systems and it functions to hold the gas valve open after a properpilot
flame is established.
Before firing of unit, place the burner baffle plate (perforated plate) over burner and
place a layer of rocks / clay balls evenly and level onto the plate. Only use rocks as
supplied with the appliance (see the diagram below)
5. User'instructions'
• Make sure that the manual shutoff valve behind the unit is turned off and that the Tandoor
gas valves are turned off.
• Open the main gas line to the Tandoor oven.
• On the appliance control valve depress and hold the back knob on the star position
indicated by a star for 10 seconds to start pilot gas flow and to clear the air from the gas
line.
• Repeatedly push the piezoigniter until the pilot burner lights. (the pilot light can be seen
faintly at 5 o’ clock below the burner plate)
• Continue to keep the control knob pressed in for a further 20-30 seconds for the flame
sensing device to establish itself.
• If the pilot burner extinguishes itself when the knob is released, repeat the above
procedure.

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• If the burner extinguishes for the any reason while the oven is operating, switchcontrol off
and WAIT 5 MINUTES BEFORE RELIGHTING. If for any reason burners become extinguished,
repeat lighting instructions beginning with Step 1.
• After the pilot burner is lit main burner can be turned on. To do so rotate the control knob
anticlockwise, (counter clock). The burner can now be set to high flame position indicated
by the large flame symbol. To adjust flames to lower flame setting, turn knob to the low
position, or anywhere between the two, continue to turn the control knob anti- clock wise
towards thesmall flame symbol.
• The main burner should light smoothly and quietly. Burner flames should be
predominantlyblue.
• When not in use, the control knob should always be set to the OFF position.
• These appliances are to be installed with sufficient ventilation to prevent the occurrence of
unacceptable concentrations of substances harmful to health in the room in which they are
installed.
• The installation instructions shall specify that the gas supply tubing or hose shall comply
with the national requirements in force and shall be periodically examined and replaced as
necessary.
• The type, length, which will not exceed 1.5 m, and position of any flexible hose or tubing
which may be used for supplying gas.
• Unless otherwise stated, the instructions indicate that the parts protected by the
manufacturer or his agent shall not be adjusted by the installer.
• Please note, perforated stainless steel lid has been supplied (with holes) which can be used
to make charred naan breads OR give other tandoori food charred flavour. The steel handle
can get very hot and YOU MUST WEAR PROTECTIVE GLOVES WHEN HANDLING THE LID.
5.1. Application'of'the'oil''
Mix plain yogurt in the ratio of 1:1 with the oil provided and mop the
mixture on the clay walls with a piece of cotton cloth and let it dry off
overnight, do the first burn as explained below on the next day.
5.2. First'firing'
It is important to gradually build up heat within the Tandoor the first time it’s being
used. The burner should be at very low setting (control valve set at LOW) for at least 4-
5 hours before gradually increasing the flame intensity.

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During this procedure the mouth of the Tandoor should be completely exposed. DO
NOT cover the opening with the stainless-steel lid. Do not be alarmed if you see small
fissures appear on the clay surface it will not affect the performance of the Tandoor.
5.3. Shutting'down'of'the'appliance'
To turn off the appliance, turn the control clockwise until the indicator on the knob is in
the off position indicated by the black dot symbol. Visually confirm that the flames have
gone out.
WARNING- after the operation the appliance will remain hot for sometime, therefore,
to avoid injury, care should be taken to prevent contact with hot surfaces.
6. Maintenance'and'cleaning'of'appliance'
Routine Maintenance - Slight hairline cracks are expected to appear in the clay pot during use. A
bag of repair clay is supplied with the oven to effect repairs as follows (when the Tandoor has
cooled down):
• Dampen the affected area with a moist cloth.
• Fill in the crack with the clay provides using a spatula.
• Smooth the foiled area with a soft moist cloth.
• Allow repair to air dry for an hour. DO NOT WET THE CLAY LINING.
Normal Cleaning - Clean all the external panels with a non-abrasive detergent. To safely remove the
build-up of grease on the clay surface, wipe it down with a cloth that has been dampened with a
solution of salt and white vinegar.
Please note: This appliance is only for professional use and that it shall be used by qualified people.
Only qualified installer should be called in to install the appliance and, if necessary, to convert it for
use with other gases
6.1. Servicing'
The tandoor oven should be routinely serviced to ensure a long trouble-free life. It is
recommended that the appliances are serviced every 6 months by a registered gas –safe
fitter/qualified person.
In the event that the ignition is delayed or becomes noisy, turn off the appliance and call
for a service.

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6.2. General'check'
Remove the control knob and the 4 screws securing the front cover and cover off over
the tap spindle.
1. General check of the appliance, e.g. installation, ventilation, gas
connections, gas supply fittings/flexible hose, restraint wire fitted isolation
shut off valve.
2. Check low flame setting, adjust as necessary.
3. Check general burner condition. Clean burner ports with vacuum cleaner or
low-pressure air.
4. Clean aeration port/air shutter opening and injector of any lint build-up.
5. Carry out gas soundness /gas leakage test.
WARNING: Components after cleaning should be replaced in reverse order of removal
and verified to be correctly positioned before Tandoor is fired. If any parts are damaged
or lost during cleaning, do not operate unit until they are replaced. To do so will void
warranty.
7. Component'Replacement'
1. Only qualified persons should conduct service or repair of this equipment.
2. Always disconnect power and fuel when repairing or servicing these appliances.
3. Any service or repair conducted on the unit as covered by the warranty has to be authorized by
the manufacturer.
4. Only the original factory parts are to be used for any repair or replacement.
5. If parts are lost or missing, obtain and install replacement parts before returning unit to service.
6. Following service, be sure to reconnect all parts, and close all panels and covers before power is
turned back on. Do not attempt to bypass any safety controls. Doing so voids warranty and
creates dangerous operating conditions.
7. Access to service most components is gained by removing of the front cover. This is done by
undoing the screws which secure the front cover and then removing cover.
7.1. Thermocouple'
1. Loosen the thermocouple and pilot gas supply connection to the valve.
2. Undo the nut holding the pilot light assembly cradle and withdraw.
3. Replace the thermocouple.
4. Replace as above in reverse order.

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DO NOT OVERTIGHTEN THE CONNECTION VALVE
The tip of the thermocouple should be 1” (25 mm) from the edge of the main burner
and level with the top of main burner.
The pilot flame should completely envelope the tip of the thermocouple.
7.2. Ignite'Electrode'
1. Remove the igniter lead from piezo.
2. Undo the nut holding the light assembly cradle and withdraw.
3. Replace the electrode.
4. Replace as above in reverse order.
7.3. Pilot'Burner'
1. Loosen the thermocouple and pilot gas supply connection to the valve.
2. Undo the nut holding the pilot light assembly cradle/bracket and replace.
7.4. Gas'Tap'Assembly'
1. Loosen and remove connections to burner pipe and gas inlet pipe
2. Loosen and remove connections to pilot burner.
3. Loosen connection to thermocouple and remove.
4. Loosen and remove the holding plate nut
5. Withdraw tap/valve assembly
6. Replace as above in reverse order
7.5. Burner'
1. Remove rocks and plate sitting on the burner.
2. Loosen connection from burner pipe to gas tap/valve and remove.
3. Withdraw burner through top of oven.
4. Replace as above in reverse order.
7.6. Injector/Orifice'Spud'
1. Loosen connection from burner pipe to gas tap/valve and remove.
2. Loosen and remove injector/orifice spud carrier from burner.
3. Loosen and remove injector/orifice spud from injector carrier.
4. If necessary clean out injector with fine wire or air hose.
5. Replace as above in reverse order.

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8. Technical'Data'
UK & European Units
Large Unit (32”x32”)
Natural Gas Rate at 20 mbar – Max: 18kW (Net) / Min: 8kW (Net)
Injector fitted with 3.6 mm
LPG Rate at 37 mbar – Max: 11.25kW (Net) / Min: 9kW (Net)
Injector fitted with 1.7 mm
Medium Unit (28”x30”)
Natural Gas Rate at 20 mbar – Max: 16.5kW (Net) / Min: 6. 5kW (Net)
Injector fitted with 3.4 mm
LPG Rate at 37 mbar – Max: 11.25kW (Net) / Min: 9kW (Net)
Injector fitted with 1.7 mm
Small Unit (24”x24”)
Natural Gas Rate at 20 mbar – Max: 16.5kW (Net) / Min: 6. 5kW (Net)
Injector fitted with 3.4 mm
LPG Rate at 37 mbar – Max: 11.25kW (Net) / Min: 9kW (Net)
Injector fitted with 1.7 mm
Pilot rates:
Natural Gas: 0.51kW
LPG: 0.52kW

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Warning Labels