Steam Connection; Gas Connection; Tightness Test - Imesa ES10 Manual De Puesta En Marcha Y Mantenimiento

E980702H
power supply and invert two of the three phases
on the terminal board.
Moreover the dryer must be connected to the
unipotential system. The installer must connect an
adequate cable (nominal section up to 10 mm
the pre-set terminal (marked by the international
label) on the machine back. Thus all the machines
are connected to the ground.

1.2 STEAM CONNECTION

For steam heated machines, the installer must
connect them to the external boiler (see pict. 2
page 34, rif. JC inlet, rif. HB outlet.). The
technician must install a trap at the steam exit, a
steam filter and a gate valve on top of the steam
coil in order to ease maintenance and servicing.
Inside the coil the steam flow is continual and
there is no need of a steam inlet electrovalve.

1.3 GAS CONNECTION

For gas heated machines, the installer must
connect them to the gas feeding (see fig.2 pag.34,
rif. KD): control the dryer technical features and in
particular the gas inlet pressure.
The feeding system must conform the regulations
in force. Pipes and gas pressure must be
adequate to dryer features (see table 5 page 4).
On top of the machine there must be gas fast
interception cock. The valve must conform
regulations in force and be certified by an
accredited company.
The interception cock must be placed near the
machine in a position easily accessible to the
operator.
The installation must be designed and carried out
according to standards in force. The dryer gas
connection is R ½" (ES10/TD10, ES14/TD14,
ES18/TD18) or R
ES34/TD34), this section cannot be reduced.
The gas feeding pipe can be permanent or not;
flexible pipes must be stainless steel DIN 3384 or
DIN 3383.

1.3.1 TIGHTNESS TEST

All the connections between the gas feeding and
the dryer must be submitted to a tightness test.
We recommend the use of leak finder sprays;
otherwise pipes can be covered with special not-
corrosive foams; in both cases pipes don't have to
produce bubbles.
It is forbidden the use of fire to inspect gas
connection for leak!
1.4 EXHAUST OUTLET
Gas heated dryers are equipment of B 22 type.
These gas heated machines must work in vented
rooms; they are not equipped with wind proof
blower on the burner back. Dryer exhaust must be
led outside through the duct. The duct must be as
short as possible and sloped upwards toward the
chimney. On the lower part of the duct a
16
2
) to
¾" (ES23/TD23 and
condensate trap must be installed and its drain
pipe must be connected to the water drainage
according to rules in force.
The exhaust duct must be perfectly tight and fit to
humid air drainage
overpressure can be approximately of 1,5 mBar),
see table 6 page 9.
1.5 OPERATION AT
POWER
During the final testing at our factory machines
are adjusted on the type of gas described on the
label on the machine back panel (see pict.1 page
31).
If the gas feeding differs from the machine gas
type, it is necessary to alter the dryer to conform it
to the new type of gas. In this case the installer
must inform your Technical Department.
At the pre-set thermal power operation depends
on the inlet gas pressure, the gas heating power,
the nozzle, its gas pressure and on the air inlet.
Dryers required gas inlet pressure is reported on
the table 5 page 4. It is forbidden to operate the
machine with pressure not included in the
prescribed range. In case of different pressure we
recommend to contact the local gas company or
the firm which has built the gas installation.
The installer may ask for the minimum heating
power to the gas company; it must correspond to
the one reported in the table 5 page 4.
Survey of the gas inlet pressure
Gas inlet pressure can be gauged connecting a
manometer either with liquid column or digital
(minimum accuracy 0,1 mBar).
Close the interception trap
Unscrew the sealing screw on the pressure
plug of the gas valve, see pict. 3 page 33.
Connect the manometer
Open the interception trap
Start the dryer according to instructions
Gauge the inlet pressure while the burner is
working
Turn off the dryer
Close the interception trap
Disconnect the manometer
Screw the sealing screw on the pressure plug
of the gas valve and check its tightness
Open the interception and check tightness
The starting-up of gas dryers is not allowed when
pressure values differ from ranges reported on
table 5 page 4 .
1.6 OPERATION AND TEST
After connecting the machine, it is important to
test the installation and the machine itself. For
example the installer must check:
- whether there are rests of packaging over the
external panels.
- whether connections conform this manual
instructions.
02/12/04
(the pipe coupling
PRESET THERMAL