Gas Connection - La Cornue Grand-Maman 90 Installation Manual

Gas connections CONNECTIONS
2. G
AS CONNECTION
Our appliances are supplied with injectors corresponding to the type of gas supply specified
in your order (natural gas, butane or propane). These injectors should only be changed if
a different type of gas is used.
See page 26 for the table summarising the injectors to be used for each type of gas, the
country of installation and injector replacement instructions.
If no particular instructions are specified in the order, the appliance is equipped with
injectors for natural gas G20 (pressure: 20 mbar.).
The type of gas for which the appliance is equipped is indicated on a label at the back of
the hob, close to the gas supply pipe and on the test certificate supplied with the appliance.
The cooker or the hob is connected to the gas supply via a male threaded connector with
G ½ thread (previous reference: 15/21).
The previously installed shutoff valve can be connected via a rigid metallic pipe installation
or by means of certified (TFEM) flexible hoses equipped with a mechanical union.
The pipes must be fully accessible and placed so that they cannot be affected by fire or
deteriorated by the combustion gases, the hot parts of the appliances or by hot products
overflowing. They must not be crushed or kinked.
Recommended hose: certified TUBOGAZ for the gas type used.
It is forbidden to connect our gas appliances with flexible hoses mounted on hose
tailpieces.
Refer to the drawings on the description pages for each appliance type for
information about the exact location of the gas and electricity outlets on your
appliance.
If a sealing compound has to be used, we recommend using LOCTITE 542.
For appliances operating with BUTANE / PROPANE gas, use two cylinders with an
automatic reversing switch or an outdoor tank, and a standard pressure reducing valve
adapted to your model's total flow rate (see tables on pages 9 – 36) and the pressure of the
gas used.
We advise you to use a pressure reducing valve with a minimum of 2 kg/hour for the hobs
and a pressure reducing valve with a minimum of 3kg/hour for the cookers.
As a general rule, an additional safety margin corresponding to 20 – 30% of the appliance's
maximum flow rate has to be respected.
The pressure reducing valve should be placed more than 2 m. from the appliance to
guarantee constant pressure from the gas supply.
18 Installation Guide - "Cornuchef" Range