BIEMMEDUE GA/N 70C Mode D'emploi page 28

Warning
The gas supply pressure must be guaranteed during
heater operation and not with the heater off.
The space heater has a gas ramp with: gas filter, pressure regulator,
safety electrovalve, work electrovalve, pressure stabilizer, pressure
valve.
It is good practice for the installer to set up the supply line as
follows:
1: filter-pressure regulator of filter
2: antivibration joint
3: stopcock
4: gas ramp
Parts (1), (2) and (3) are available as accessories and are not
supplied with the heater.
When the line has been connected:
• Bleed the gas supply pipe;
• Check that the gas pipe is sealed.
• Open the gas stopcock and check the seal of all connections to
the heater.
4.4. FIRST START-UP
The heater is set up for one of the operating categories in Tab. I:
the adhesive label applied on the gas valve group (4) indicates the
appliance category (usually category I2H, G20 / 20 mbar).
Before starting the generator it is necessary to consult the Tab. I
to establish the original appliance category, fixed compulsory from
the referring European and national rules, relating to the country of
residence.
Warning
If the appliance category is not the one the unit is set up
for, follow the detailed instructions in the section
"CHANGING TYPE OF GAS".
Only when the heater has been prearranged according to its
proper appliance category will it be possible to carry out the
following operations:
• Leak away some gas from the feed pipe;
L-L 222.01-BM
EN
• Check that the gas pipe has no leaks.
• Open the gas stopcock and start the space heater;
Warning
The gas valve group is set up for a maximum supply
pressure of 60 mbar.
If the supply pressure is greater than this value, the valve
safety membrane could break and cause the valve safety
stop to be triggered.
• Connect a gauge to the upstream pressure intake (1) of the
valve group (Fig. 3);
• Read the supply pressure off the 1st gauge and if necessary
adjust the gas supply system pressure regulator until the
correct supply pressure shown in Tab. I is reached;
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4
1
4
4.5 CHANGING TYPE OF GAS
This operation may be carried out several times during the
working life of the heater and not only at initial start-up.
First of all refer to Tab. I to identify the reference category for
natural gas or liquid gas according to the country of residence. For
each category the supply pressure, the working pressure and the
arrangement of the diffusion ring (3) are stated.
To convert from one type of gas to another proceed as follows:
• If stated in Tab.I, change the diffusion ring (3 Fig. 1):
• Remove the upper body of the heater;
• Unscrew and remove the ionisation electrode (6);
• Undo the screws that secure the combustion head (3) to
the combustion chamber (1);
• Remove the three screws on the burner head plate and
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SIT 822 NOVA
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HONEYWELL VR 46
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