grandimpianti EM10 Mode D'emploi page 18

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Fume discharge
The chimney pipe must have a minimum
length of one 90° bend plus 1 linear metre,
and a maximum total length of 15 metres +
one 90° bend.
The chimney pipe must have a smooth in-
ternal surface and must be made of a mate-
rial which can handle the temperature of the
exhausted fumes (maximum temperature =
350°C).
Current regulations provide detailed instruc-
tions on the type and quality of the materi-
als used in fume discharge pipes and rela-
tive accessories, fume channels, chimneys
and flues. See:
UNI CIG 7129
UNI CIG 7131
ONLY approved chimney pipes may be
used. Use insulated chimney pipes when
distances exceed 15 metres plus one 90°
bend.
ATTENTION
A 90° bend corresponds to 1 linear me-
tre of chimney pipe.
For safety reasons, it is very important
to check the air/fume system for proper
draught of the burnt gasses. This check
must be performed by the installer every
time the system or the machine is serv-
iced (even partially).
Any unit equipped with an operating
burner draws in air for combustion and
discharges fumes. As a result, if com-
bustion takes place in a closed room, air
must be drawn in from the outside
through a dedicated vent (see chapter
5.6: AIR INTAKE).
Even if the chimney pipe is insulated, it may
heat up. Therefore, pay close attention to
the potential risk of burning the skin in case
of accidental contact with the pipe.
If the chimney pipe is blocked, the gas feed
will be shut off by the electronic safety
switch on the machine and by the manual-
reset safety thermostat (TS1) located at the
top of the heating array.
If this occurs, specialised personnel must
remove the cause of the obstruction in the
chimney and restart the machine. The ma-
chine is restarted by first pressing the reset
button at the centre of safety thermostat TS1
and then pushing the green reset button next
to the gas connection on the flame control
unit. Before working on the machine, dis-
connect it from the power mains. To gain
access to the safety thermostat, remove the
top cover panel on the machine. This panel
must be put back into its original position
after service operations have been com-
pleted.
CHECKS THAT MUST BE PER-
FORMED ON GAS-FIRED MA-
CHINES
Daily inspection
Filter and suction unit
Keep the filter and the suction unit clean.
These components must be inspected daily,
which is easy to perform through the spe-
cial access door on the machine. If the fil-
ter or the suction unit becomes clogged with
dust and lint, the air flow through the ma-
chine will be reduced and the following
problems will occur:
1) Combustion will not be correct, which
will continuously trigger safety thermo-
stat TS1 or alarm AL5 and shut down
the heating system;
2) The efficiency of the machine will be
reduced, which will significantly
lengthen drying and production times.
Be sure to perform these operations every
day. They can be carried out directly by
the operator.
Flame quality
The flame must be compact in form and blue
in colour. If it is irregular or yellow in col-
our, the machine needs to be serviced by a
qualified service technician.
Regular inspection by a qualified service
technician
ATTENTION
The checks described in paragraph 8.3 must
also be performed.
In any case, call the service technician if
any of the following situations occurs:
1) If soot, dirt or spots due to possible burns
appear on the machine or in the imme-
diate vicinity;
2) If the flame is not compact in form and
blue in colour:
3) If strange noises are heard at start-up;
4) If the gate valves on the gas line are not
operating properly (for example, if they
do not completely shut off the gas when
closed);
16
5) If safety systems such as alarm AL5 or
manual-reset thermostat TS1 trip repeat-
edly.
What to do if you smell gas
All combustible gasses have a characteris-
tic odour which enables them to be recog-
nised before they reach dangerous concen-
trations in case of leaks.
If you smell this characteristic odour, pro-
ceed as follows:
1) Open doors and windows to air out the
room as thoroughly as possible;
2) Immediately shut off all flames on all
burners;
3) Close the gate valve or main valve on
the gas feed to the machine or machines;
4) Do not smoke or light open flames;
5) Do not use any type of electric equip-
ment or telephones;
6) While keeping the main gate valve
closed, make sure that any secondary
gate valves are also closed.
Remember that if the machine is fired with
liquefied gas (LPG), the area must be "swept
out" at floor level if a leak has occurred.
Liquefied gas is heavier than air and tends
to collect near the floor.
In any event, immediately call a qualified
service technician, who will repair the leak
and test the gas feed system to make sure it
is properly sealed.
5.8.1 INSTRUCTIONS FOR CHANGING
MACHINE CONFIGURATION TO USE
OTHER TYPES OF GAS
Substitute the nozzle located on the right
side of the burner and make sure the diam-
eter of the new nozzle corresponds to the
specifications on the following table.
See exploded diagram of gas unit, detail "B"
n°3.
Gas supply
Model
Type pressure mbar
Diameter of
(positions 4
of gas nozzle mm
and 2)
1 G20 20 3.50
EMG10
2 EMG10 G30 30 1.95
3 G31 37 1.95
EMG10
4 G20 20 4.20
EMG15
5 G30 30 2.30
EMG15
6 G31 37 2.30
EMG15
7 G20 20 4.80
EMG25-35
8 G30 30 2.70
EMG25-35
9 G31 37 2.70
EMG25-35
10 G20 20 4 x 3.50
EMG50
11 G30 30 4 x 1.95
EMG50
12 EMG50 G31 37 4 x 1.95
Pressure at
Rated
burner mbar
power
(positions 1
KW
and 5)
10.0 15.70
29.2 15.70
15.70
36.0
8.5 20.50
28.9 20.50
20.50
36.0
30.00
10.0
29.1 30.00
30.00
36.0
4 x 15.70
10.0
29.2 4 x 15.70
36.0 4 x 15.70