Lotus CW-74G User manual

Translation of the original instructions
Installation and operating instructions
GAS GRILL FOR PROFESSIONAL
USE
CW-74G CW-78G CWT-74G CWT-78G
Model LIBR.ISTR.CW70G
Code 563006702
Review 1
Edition date 09/11/2018
Language English
LOTUS S.p.A.
Via Calmaor, 46
31020 San Vendemiano
[phone]
[phone]

Contents
Translation of the original instructions
2
Contents
1 INTRODUCTION......................................................................................................................... 3
1.1 Installation drawing...................................................................................................................... 3
1.2 Components................................................................................................................................. 4
1.3 Example installation of the appliance........................................................................................... 7
2 GENERAL INFORMATION......................................................................................................... 8
2.1 Declaration of compliance............................................................................................................ 8
2.2 Technical data table..................................................................................................................... 9
3 INSTALLATION........................................................................................................................... 10
3.1 Delivery checks ............................................................................................................................ 10
3.2 Removing the packaging ............................................................................................................. 10
3.3 Mechanical installation ................................................................................................................. 10
3.4 Electrical/gas connections ........................................................................................................... 10
4 BURNERS TECHNICAL DATA TABLE (ITGB).......................................................................... 14
4.1 Burners technical data table ........................................................................................................ 14
5 INSTRUCTIONS FOR USE......................................................................................................... 15
5.1 General information ..................................................................................................................... 15
5.2 Switching the pilot burner on........................................................................................................ 15
5.3 Starting the main burner and adjusting the temperature.............................................................. 15
5.4 Switching the main burner off ...................................................................................................... 15
5.5 Switching the appliance off .......................................................................................................... 15
5.6 Emptying the container................................................................................................................ 16
5.7 Observations and advice ............................................................................................................. 16
6 MAINTENANCE.......................................................................................................................... 17
6.1 Routine......................................................................................................................................... 17
6.2 Replacing the main burner nozzle ............................................................................................... 17
6.3 Replacing the pilot burner nozzle................................................................................................. 17
6.4 Minimum setting ........................................................................................................................... 18
6.5 Burner maintenance..................................................................................................................... 18
6.6 Spare parts .................................................................................................................................. 18
7 CLEANING.................................................................................................................................. 20
7.1 Routine cleaning.......................................................................................................................... 20

INTRODUCTION
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1 INTRODUCTION
1.1 Installation drawing
FIG. 1 CW-7..G
FIG. 2 CWT...
A Data Plate
C Gas connection

INTRODUCTION
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1.2 Components
FIG. A
1 Injector
2 Extends drainage
3 Pilot
4 Ignition spark plug
5-6 Tap knob
7 Gas pipes
8 Gas tap
9 Piezoelectric
10 Fat collection pan
11 Burner
12 Tank
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INTRODUCTION
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FIG. B
A Piezoelectric
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FIG. C
1 Bracket
2 Pilot light nozzle
3 Extends drainage
4 Ignition spark plug
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FIG. D
Burner air adjustment

INTRODUCTION
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FIG. E
1 By-pass
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INTRODUCTION
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1.3 Example installation of the appliance

GENERAL INFORMATION
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2 GENERAL INFORMATION
2.1 Declaration of compliance
The manufacturer declares that the appliances comply with the requirements of the regulation GAR
2016/426 for the gas part and directive 2014/30/EU,2014/35/EU for the electrical part. Installation must be
performed in compliance with current regulations, especially with regard to ventilation of the premises and
the exhaust gas evacuation system.
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·Read the warnings in this manual carefully. They provide important information about safe installation,
use and maintenance.
·The instruction manual must be kept for the entire duration of the equipment and made available to users
for every possible consultation. The manual should be consulted for any information concerning
installation, use and maintenance of the appliance.
·After removing the packaging, check the integrity of the equipment.
·All packaging materials (plastic bags, polystyrene, staples, etc.) must be disposed of in compliance with
current regulations.
·Before connecting the appliance, make sure that the information on the data plate matches the electricity
and gas mains where the appliance is installed. The manufacturer accepts no liability if the
equipment is not connected in accordance with current regulations.
·Always keep all parts of the equipment clean to avoid the risk of oxidation/rust and/or aggression by
chemical agents.
·The equipment must only be used by personnel trained for the purpose.
·The installation must be implemented by professionally qualified personnel in accordance with
the manufacturer's instructions and current reference standards.
·The electrical safety of this equipment is only ensured when it is correctly connected to an effective
ground/earth system as required by current electrical safety standards. The manufacturer cannot be held
liable for any damage caused if the system is not connected to ground/earth.
·Before carrying out any cleaning or maintenance tasks on the equipment, unplug it from the electricity
mains. In the event of faults or malfunctions, always deactivate the appliance.
·Repair work of any kind must only be performed by qualified personnel.
·This appliance must only be used for its expressly intended purpose for cooking or heating food. Any
other use is considered improper.
·The appliance is intended for professional use and must be used by trained personnel.
·The installation and possible transformation to another power supply voltage (if envisaged), or
transformation for operation with another type of gas, must be implemented exclusively by qualified and
authorised professional personnel.
·Before using the appliance, carefully clean all surfaces intended to come into contact with food.
·The manufacturer declines any and all liability for any direct or indirect damage resulting from improper
use of the equipment. The manufacturer declines any and all liability for damage caused by incorrect
installation, tampering, poor maintenance and unskilled use. Moreover, the manufacturer declines any
liability for possible inaccuracies that may be contained in this booklet attributable to errors in
transcription or printing and equally reserves the right to make any changes to the product it deems
useful and/or necessary without compromising its essential characteristics.
·The manufacturer cannot be held liable for any damage caused by failure to comply with these
basic standards and all other use and maintenance standards contained in this booklet.

GENERAL INFORMATION
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2.2 Technical data table
Technical data table CW S70G
MODEL DIMENSIONS GAS FITTING
ISO 7-1
RATED
TOTAL GAS FLOW
(kW)
LAVA STONE (Kg)
CW-74G 40x70x90h R 1/2GM 9 9
CW-78G 80x70x90h R 1/2GM 18 18
CWT-74G 40x70x29h R 1/2GM 9 9
CWT-78G 80x70x29h R 1/2GM 18 18
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INSTALLATION
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3 INSTALLATION
3.1 Delivery checks
On delivery, it is important to check the following:
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·External conditions of the packaging
·The general status of the equipment
·The conformity of the model with the information in the technical data plate and the instruction manual
·The conformity of the equipment and components to the order form
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3.2 Removing the packaging
While removing the packaging, take care not to damage the appliance. Remove the protective film from the
stainless steel and eliminate any traces of glue. Do not smoke. Perform this operation away from sources of
heat and wear protective gloves. Do not disperse packaging material in the environment, keep it out of the
reach of children and dispose in compliance with current legislation.
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3.3 Mechanical installation
Place the appliance on a flat base. Adjust and stabilise the appliance by acting on the support feet. Make
sure that the surrounding walls and/or equipment are capable of withstanding the heat emitted by this
appliance. Connect the water supply (if necessary).
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Caution
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Do not install the appliance near equipment/machines used in cold processes. If the appliance
has to be installed close to cold process equipment, it is advisable to install non-combustible
thermal insulating material and/or neutral elements between them.
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3.4 Electrical/gas connections
Before being offered for sale on the market, the appliance was subjected to gas and electrical testing (as
required). The appliance is supplied without a power cable. The installation technician must connect the
equipment in compliance with current safety regulations on the basis of the power of the appliance.
Note
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The ID plate is located in the compartment inside the door for appliances with compartments, or on
the left side for appliances with an oven or a top. A second plate with the model and serial number is
located inside the dashboard and a third is included with the certificate of conformity. The serial
number can also be tracked from the sales document (after 2008). The plate has all the data needed
for correct electrical installation. The installation and possible conversion to another power supply
voltage (if envisaged) must be implemented exclusively by professionally qualified and authorized
personnel. Before using the appliance, carefully clean all surfaces intended to come into contact with
food.
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Warning

INSTALLATION
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Installation operations, any conversion to other types of gas and start-up must only be
performed by qualified personnel, in accordance with current regulations.
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Gas systems, electrical connections and premises where the appliances are installed must comply with
current regulations in the country of installation; in particular, the appliance must be installed in a room with
good ventilation, if possible under a suction hood to ensure complete evacuation of the exhaust gases
formed during combustion. The air required for combustion is 2 m3/h per kW of installed power. The
appliance can be installed alone or in series with other appliances in our production range. A minimum
distance of 10 cm between appliances must be respected to prevent contact with any walls made of
flammable material; furthermore, appropriate measures should also be adopted to ensure the thermal
insulation of flammable parts, such as the installation of heat shields; take special care to ensure that
appliances are installed in an appropriate and safe manner. The support feet can be adjustable in height and
any unevenness can therefore be eliminated.
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GAS CONNECTION
The gas connection (see installation drawing) must be implemented using steel or copper pipes or steel
hoses, in compliance with applicable national standards. All appliances must be equipped with a gas shut-off
valve and fast-closing valve. Once installation is complete, make sure that there are no gas leaks from the
fittings; to do this, do not use a naked flame but substances that do not cause corrosion, such as solutions of
soapy water or leak detectors. All our appliances are subjected to detailed examination: the type of gas,
pressure in use and the pertinent category are indicated on the data plate (see attachment).
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Note
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The year of construction of the appliance is indicated under "N" on the data plate. The first 2 digits
indicate the year of construction.
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·THERMAL OUTPUT CONTROL
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The appliances must be checked in order to verify that their thermal output is correct:
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·Thermal output is indicated on the appliance's data plate;
·Firstly, make sure that appliance is set for the type of gas used and then make sure that the indication on
the data plate matches this gas. To adapt the appliance to another type of gas, make sure that the type of
gas in question complies with the information in this instruction manual.
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Warning
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Pressure is measured with a pressure gauge (minimum resolution of 0.1 mbar) mounted on
the appropriate socket. Remove the M6 locking screw and insert the pressure gauge tube.
The test must be performed with all the burners on the appliance switched on and all the
appliances in the same line switched on. After taking the measurement, replace the screw,
firmly tighten and check the seal.
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Liquid gas connection G30 / G31
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The liquid gas connection pressure is 30 mbar for butane and 37 mbar for propane. Check the data plate,
measure the pressure and verify that the description of the nozzle installed matches the information provided
by the manufacturer.
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Methane gas connection H G20
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The methane gas connection pressure is 20 mbar. Check the data plate, measure the pressure and verify
that the description of the nozzle installed matches the information provided by the manufacturer.
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·CHECKING THE PRIMARY AIR FOR MAIN BURNERS AND PILOT NOZZLE

INSTALLATION
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For burners equipped with air adjustment, set the adjustable bushing and lock it with a screw. The "Burner
technical data" table shows approximate values for the "h" parameter (primary air). The primary air flow
volume must be adjusted to avoid a flame cut-off when the burner is cold and a flame blowback when the
burner is hot. The pilot air adjustment is set testing for the gas which the appliance will use. In the event of
conversion to other types of gas, adjust the air using the adjustment bush until the pilot flame is steady and
has an intense blue colour.
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Disposition for conversion and installation for other types of gas:
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Our appliances are tested and set for liquid gas or natural gas (see attached data plate). Conversion or
adaptation to another type of gas must be performed by a specialist technician. The nozzles for the various
types of gas are contained in a bag included in the supply and are marked in hundredths of mm (see
"Burners" technical data table).
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·INSTRUCTIONS FOR EVACUATING EXHAUST GASES
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- "A" type devices (see data plate)
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"A" type appliances must discharge combustion products into appropriate hoods, or similar devices,
connected to an efficient fume stack or directly to the outside. (Natural evacuation) Fig. 1
If this is not possible, using an air suction device connected directly to the outside is permitted (Forced
Evacuation) Fig.2, having a flow capacity not lower than the value defined in point 4.3 of the UNI-CIG 8723
standard.
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- In the case of forced evacuation
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The gas supply to the appliance must be directly servo-controlled by the system and must stop if the flow
rate drops below the values indicated in point 4.3 of the UNI-CIG 8723 standard. Resetting the gas supply to
the appliance must be possible only by hand.
1 Extractor hood
2 Servo system
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- "B11" type devices (See data plate)
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Natural evacuation (fig.3)
Connection to an efficient natural draft fume stack by means of a windproof connection, with discharge of
combustion products directly to the outside
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INSTALLATION
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Forced evacuation (fig.4)
The gas supply to the appliance must be directly servo-controlled by the forced evacuation system and must
stop if the flow rate drops below the values indicated in point 4.3 of the UNI-CIG 8723 standard. Resetting
the gas supply to the appliance must be possible only by hand. If the installation is under a hood, the
terminal part of the appliance's exhaust pipe must be at least 1.8 meters from the appliance's support
surface (ground). The outlet section of the exhaust pipes for combustion products must be placed within the
perimeter in relation to the hood itself.
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1 Windproof fume stack (fig.3) - Extractor hood (fig.4)
2 Servo system
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"B11" type appliances are supplied on request with a hood or a hood and windproof fume stack to be
assembled and delivered separately.

BURNERS TECHNICAL DATA TABLE (ITGB)
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14
4 BURNERS TECHNICAL DATA TABLE (ITGB)
4.1 Burners technical data table
Technical data table - Burner CW S70G
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12.68 kWh/KG
G30
BUTANE
30 mbar
12.87 kWh/KG
G31
PROPANE
37 mbar
9.45 kWh/m3st.
G20
METHANE H
20 mbar
CW-74G
(Burner max 9 kW min.2.7kW)   
Burner injector 1/100 mm 1 x 150 1 x 150 1 x 220
Minimum adjustment 1/100 mm 70 70 adjustable
Pilot injector 30 30 51
Primary air setting h = mm 17 17 17
Consumption kg/h 0.710 kg/h 0.699 m³st./h 0,952
CW-78G
(2 Burners max 9 kW min.2.7kW)   
Burner injector 1/100 mm 2 x 150 2 x 150 2 x 220
Minimum adjustment 1/100 mm 70 70 adjustable
Pilot injector 30 30 51
Primary air setting h = mm 17 17 17
Consumption kg/h 1.42 kg/h 1.398 m³st./h 1.904
CWT-74G
(Burner max 9 kW min.2.7kW)   
Burner injector 1/100 mm 1 x 150 1 x 150 1 x 220
Minimum adjustment 1/100 mm 70 70 adjustable
Pilot injector 30 30 51
Primary air setting h = mm 17 17 17
Consumption kg/h 0.710 kg/h 0.699 m³st./h 0,952
CWT-78G
(2 Burners max 9 kW min.2.7kW)   
Burner injector 1/100 mm 2 x 150 2 x 150 2 x 220
Minimum adjustment 1/100 mm 70 70 adjustable
Pilot injector 30 30 51
Primary air setting h = mm 17 17 17
Consumption kg/h 1.42 kg/h 1.398 m³st./h 1.904
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INSTRUCTIONS FOR USE
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15
5 INSTRUCTIONS FOR USE
5.1 General information
This appliance must only be used for its expressly intended purpose for cooking or heating food. Any other
use is considered improper. The appliance is also intended for industrial use and must only be used by
personnel trained for use and aware of the risks that the hot element entails.
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Warning
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The appliance operates at high temperatures, so the following is necessary:
·Pay attention to the areas surrounding the hot surface during routine normal operation
(danger of scalding);
·RISK OF BURNS Do not touch hot surfaces floor with your hands or other parts of the body
to avoid burns caused by high temperatures;
·After switching off the appliance, wait for a sufficient time for it to cool before carrying out
any cleaning or maintenance operation.
5.2 Switching the pilot burner on
·Place gas knob in position and hold it pressed. Simultaneously, press the piezoelectric button to
generate the spark: the pilot lights up
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Note
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The flame might go out, in which case the procedure must be repeated.
5.3 Starting the main burner and adjusting the temperature
·Turn the knob into position to set the burner to maximum
·Turn the knob into position to set the burner to minimum
5.4 Switching the main burner off
·Turn the knob into position . The burner turns OFF and only the pilot flame remains ON
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5.5 Switching the appliance off

INSTRUCTIONS FOR USE
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·Press and turn the gas cock knob to position "0". This control blocks the gas supply to both the main
burner and the pilot burner
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5.6 Emptying the container
This rack should be checked regularly and emptied before it is full. In any case, the rack must be cleaned
after switching off the appliance
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5.7 Observations and advice
·In the case of appliances with two cooking zones, it is possible to set different temperatures on the two
halves of the plate, or use only one half.
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MAINTENANCE
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17
6 MAINTENANCE
6.1 Routine
When using the appliance over time, it is essential to perform regular maintenance to ensure safe operation.
We therefore recommend stipulating a service contract.
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Caution

Maintenance must only be performed by specialist personnel in compliance with current
regulations and our own instructions.

Before carrying out any maintenance and/or cleaning operation:
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·Disconnect the appliance from the mains power supply and/or close the gas.
·Wait for a sufficient time for the appliance to cool down.
·Do not wash the appliance with direct or high-pressure jets of water, since any infiltration of water into the
electrical components could jeopardise correct operation of the appliance and its safety systems.
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Warning
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For maintenance/replacement of components, order and use only original spare parts.
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Replacing parts must exclusively be performed by authorised and/or qualified personnel. When replacing the
electrical components of the machine and the electrical panels, scrupulously follow the technical
characteristics for the replacement component indicated on the component itself. The appliance does not
require any special maintenance but during the use of the equipment it is advisable to check the following at
least once a year (possibly increasing the frequency depending on the degree of use):
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·The status of connections especially on the terminal board and the power supply cable, as well as the
status of the gas connections;
·The operating condition of the various components (perform a functional test);
·For appliances fitted with rotary resistances, remove the hub, grease it and replace the three o-ring seals
to avoid possible leaks.
6.2 Replacing the main burner nozzle
·Remove the front screws fastening the dashboard/panel and pull it outwards
·Detach the starter cable
·Unscrew the nut and lower the air adjustment bracket
·Using a suitable wrench, unscrew the nozzle and replace it with an appropriate new one
·Refit the air adjustment bracket in its initial position. Pay attention since the height of the bracket depends
on the type of gas used (see technical data table)
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6.3 Replacing the pilot burner nozzle
The pilot burner flame has a fixed air supply. The only necessary item is replacement of the nozzle
depending on the type of gas used (see technical data table).
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·Unscrew the coupling connecting the pilot tube to the pilot itself and slide out the nozzle to be replaced

MAINTENANCE
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·Replace the nozzle with the appropriate version and make sure that, after ignition, the flame correctly
touches the tip of the thermocouple
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Warning
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After conversion to another type of gas, update the technical data plate to indicate the type of
gas for which the appliance has been converted.
6.4 Minimum setting
·After conversion to use another type of gas, or if a flame is too high when the knob is in position (
small flame), adjust the minimum setting by turning the by-pass screw. For operation with LPG, the
by-pass must be completely closed; for operation with natural gas, it must first be closed and then
opened by 1/4 turn
6.5 Burner maintenance
CW burners, in view of the type of construction and cooking, are subject to overheating and wear, especially
if excesisve lava stone is used. For this reason and to facilitate maintenance, the burner can be conveniently
removed and cleaned as required. Additionally, meat enzymes, salt, etc. are highly aggressive for burner
parts in steel. The burner cannot be made of stainless steel, since heat deformation of this material would
compromise burner operation. Some parts of the burner are in AISI 304, others in AISI 316 and others still in
Fe430. We recommend users to perform routine maintenance: remove and clean the burner at regular
intervals
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
6.6 Spare parts
It is possible to replace parts such as the gas tap, thermocouple, spark plug or the gas pipes simply and
quickly.
To replace such parts, proceed as follows:
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·GAS TAP: after disassembling the front panel, unscrew the gas connection screw couplings, remove the
coupling, replace the faulty parts and install the new ones in sequence
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·THERMOCOUPLE: unscrew the pilot burner coupling, unscrew the gas tap coupling in the same way
and replace the element
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·SPARK PLUG; unscrew the coupling, remove the damaged one and replace it.
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MAINTENANCE
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Caution

WHAT TO DO IN THE EVENT OF FAULTS:
Close the gas connection cock and/or switch off the power using the up-line device. Notify
customer service.
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Warning
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MEASURES TO BE TAKEN IF THE APPLIANCE IS NOT TO BE USED FOR A LONG TIME:
Close the gas cock and/or disconnect the power supply. Clean the system as specified above.

CLEANING
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7 CLEANING
7.1 Routine cleaning
Caution
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The use of flammable fluids to clean the appliance is forbidden
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To ensure hygiene and the durability of the appliance, perform external cleaning on a regular basis, taking
care not to damage the cables and the electrical connections. Before starting cleaning, disconnect the
appliance from the power supply. Parts in steel can be washed with warm water and a neutral detergent:
Rinse them thoroughly to eliminate all traces of detergent and then dry with a dry cloth. Do not use abrasive
and corrosive detergents. Enamelled parts must be washed with soapy water. For appliances that included
an oven, cleaning it is made easier by removing the support grid. Thorough, daily cleaning prevents faults
and accumulated deposits of fat and/or food. The steels used in the manufacture of professional equipment
are tried and tested materials of the highest quality. Thanks to their characteristics, they are ideal materials
for use with food substances.
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Consequently, when using stainless steel appliances, the following suggestions must be observed:

·Stainless steel surfaces must always be kept clean, also ensuring contact with the air. The lack of oxygen
under layers of scale, starch, egg white or other deposits means that surfaces can be affected by
corrosion
·Do not use products containing salt or sulphuric acid to remove scale. Suitable products are available
commercially but a diluted solution of acetic acid can also be used
·To clean STAINLESS STEEL appliances, it is advisable to use detergents specifically formulated for this
material. For "minor cleaning", a mild washing up liquid solution may also be used
·Do not wash the appliance with jets of water under pressure
·Avoid using detergents containing abrasive powders or bleaches of any kind
·Lockable stainless steel appliances, during periods of inactivity, must be left uncovered so that air can
freely access internal metal surfaces
·Stainless steel must not remain in contact for long periods with concentrated acids or with aromatised
concentrates such as salt solutions, mustard, spice mixtures or the like. At certain temperatures and
concentrations, these substances can damage the passive layer. Contact surfaces must therefore be
immediately rinsed with clean water and then dried
·It is inadvisable to use stainless steel pots exclusively to cook foods in salt water (pasta, rice, potatoes,
etc.). From time to time, these pots must also be used to cook foods containing fats or vegetables. This
helps to prevent damage caused by corrosion
·After cooking foods in salt water, rinse the tanks with fresh water since salt water residues from cooking
form layers of highly concentrated saline solution that can cause spotting corrosion
·To prevent so-called secondary corrosion, prolonged contact of stainless steel with ferritic steels should
be avoided
·Any secondary corrosion spots must be eliminated immediately
·Do not use sharp objects that may scratch stainless steel parts and consequently give rise to
deterioration
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