Pipe For Gas Connection; Checking Heat Output; Connection With Natural Gas H G20; Checking Primary Air In Main Burners - Lotus CW-74G Instructions Pour L'installation Et L'emploi

The gas connection must be done with steel or copper pipes, or otherwise with flexible steel pipes in compliance with
the national norms, if such exist. Each appliance must be provided with a cutoff cock for rapid interruption of the gas
supply. Once the appliance has been installed, it is necessary to check for gas leaks from the pipe fittings; do not use a
flame for this purpose but a non-corrosive substance such as soapy water or the specific leak-finder sprays. All our
appliances undergo careful testing: the type of gas, the operating pressure and the category are indicated on the data
plate.
The appliances must be checked in such a way as to verify that the heat output is correct:
• The heat output (thermal power) is indicated on the data plate of the appliance.
• Firstly, check that the appliance can be used with the type of gas supplied; then check that the indication on the
plate corresponds to the gas to be used. For converting to another type of gas, check that the type of gas complies
with what is stated in this instruction manual.
The pressure is read with a gauge (minimum resolution of 0.1 mbar) inserted in the relative pressure outlet.
Remove the hermetically closed screw and connect the gauge pipe.
After reading, put back the screw, tightening it hermetically and check for leaks.
The connection pressure for liquid gas is 30 mbar with butane and 37 mbar with propane.
Check the plate, read the pressure and verify that the description of the nozzle installed corresponds to the one supplied
by the manufacturer.
The connection pressure for natural gas is 20 mbar.
Check the plate, read the pressure and verify that the description of the nozzle installed corresponds to the one supplied
by the manufacturer.
All the burners are provided with a bush for regulating the primary air which must be positioned at a distance h
indicated in the technical data table.
CW-74G/CWT-74G 1 burner
CW-78G 2/CWT-78G burners
(max 7 kWmin.2,7kW)
Burner Injector 1/100 mm
Min. output adjustment 1/100 mm
Pilot Injector
Primary air h=mm
Consumption
RULES FOR CONVERTING AND INSTALLING OTHER TYPES OF GAS
Our appliances are tested and regulated for liquid gas (see plate inside).
The conversion or adaptation to another type of gas must be carried out by a specialized technician. The nozzles for the
various types of gas are in a packet supplied with the appliance and are marked in hundredths of mm (see the technical
data table).
GB

PIPE FOR GAS CONNECTION

CHECKING HEAT OUTPUT

Connection for liquid gas G30/G31

Connection with natural gas H G20

CHECKING PRIMARY AIR IN MAIN BURNERS

TECHNICAL BURNERS DATA TABLE
12.68 kwh/KG
G30
BUTANE
28 mbar
135
70
30
15
kg/h 0,552
IE
IT CH
12.87 kwh/KG
G31
PROPANE
37 mbar
135
70
30
15
kg/h 0,544
26
3
9.45 kwh/m st.
G20
NATURAL GAS
20 mbar
195
adjustable
51
15
0.740 m³st./h