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4.5
Gas train installation
Check that there are no gas leaks.
Pay attention when handling the train: danger of
crushing of limbs.
Explosion danger due to fuel leaks in the pres-
ence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure that the fuel interception tap is closed
before performing any operation.
The operator must use the required equipment
during installation.
The gas train is to be installed to the right or to the left of the gas
burner, in a horizontal position only. For the installation, proceed
as follows (Fig. 2):
Disconnect the system.
Check the data on the label match the mains voltage (+10%
-15%).
Unscrew the protective plug from the flange and connect the
gas line.
the pulse lines (P
and P
L
tion manual. If P
is not connected, do not block the gas
F
train test point.
The pipe connecting the P
be located so that any condensation is discharged into the
combustion chamber.
It is also important that the hose (P
touching the boiler door since the high tempera-
ture would damage it.
The run for the pulse lines must be short.
DANGER
Once the connection is completed, check the air-
tightness of the pipes and pulse lines.
Use leak finder spray carefully.
Test pressure: Pmax = 100 mbar.
After assembling, check the gas train operation
and air-tightness.
For dismantling proceed in the opposite order.
Failure to comply with the warnings may result
in the valve malfunctioning and being dam-
aged.
2903011
) as stated in the burner instruc-
F
valve tap to the boiler tap must
F
and P
L
F
Installation
P w
mb a r
N
For flange joints perform a progressive screws ti-
ghtening by a symmetrical crossed sequence.
To ensure a correct seal and prevent malfunc-
tions, the tightening torque ONLY for the type of
CAUTION
flange joint indicated in Fig. 3 is 50 Nm ± 10%.
The gas train is delivered after a full end of line
test, which ensures the absence of leakages for
all junction points. The field pressure test, requi-
red to check leakages for the whole gas piping,
CAUTION
shall be performed at pressure level not higher
than the limit allowed by burner gas train (See pa-
ragraph "Technical Data").
) is not
5
GB
V
D7034
P L
P F
Fig. 2
20207348
Fig. 3
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