E100301X rev5
21/02/14
ATTENTION!
The gas maximum pressure admitted is
50mbar. To supply the gas with an higher
pressure, even for short time, may damage the
valve.
The gas distribution system must be realised in
compliance with the rules in force and it must
respect the sections and the pressure suitable for
the installed equipment. .
Look to the following picture: before the machine
must be installed a rapid gas interceptor cock (1);
the gas cock must be near the dryer and in an
easy reachable position. The cock must comply
with the rules in force and must be an approved
model.
A low point pressure switch must be provided (2).
The connection to the gas system must be made
using a no-vibration joint (3); if flexible tubes are
used, these must be in stainless steel DIN 3384 or
DIN 3383.
The gas system must be realised in compliance
with the rules in force. The dryer gas connection
has a dimension, which is written in the technical
data sheet; this dimension do no must be
reduced.
The next picture shows how the machine should
be connected in case of gas cylinder with high
pressure: in this case a two steps reduction
system is necessary; it must be realised in
compliance with the rules in force.
A first 1.5mbar governor must be connected after
the high pressure gas cylinder (1), after that a
safety valve with the appropriate dimension must
be installed (2).
The high pressure tube (3) is interrupted by an
interceptor cock (4) and then it follows protected
(5) below the compartments division area border.
Before to enter in the room where the machine is
installed, a second interceptor valve must be
provided and then a filter (6) and a second
governor (7) which brings the pressure to the
correct working value.
11. GAS CONNECTION: TIGHTNESS TEST
All the joints between system and dryer must be
tightness tested .
To make this test, it is suggested to use a leak
finder spray; otherwise the joints can be covered
with a foamy substances, which must not be
corrosive. In both cases, bubbles must not be
created.
ATTENTION!
It is forbidden to use free flame for the
tightness test!
12. GAS CONNECTION: THERMAL POWER
Each dryer tested in the factory is prepared for the
kind of gas which is written in the sticker near the
serial number plate.
If the machine is predisposed for a gas which
does not correspond to the kind available in the
installation place, then it is compulsory to make
the dryer adaptation. In this case, the authorised
after sales centre must be informed.
The dryer working with the expected thermal
power depend on the inlet pressure and the gas
calorific power, but also depend on the nozzle, the
gas pressure arriving to the nozzle and from a
correct supply of primary air.
The pressure of the gas arriving to the machine
must be included in the limits written on the gas
type tables. It the pressure is not included in the
limits written in this manual, the dryer cannot be
started.
If the verified gas pressure is different from the
tables values, please contact the gas company or
the company which realised the gas system.
The GAS Lower Calorific Power, which must be
asked to the gas company, must correspond to
the one indicated in the technical data table.
13. GAS CONNECTION: GAS INLET
PRESSURE CONTROL
The inlet gas pressure must be controlled using a
digital or liquid measure tool. (precision: at list 0.1
mbar).
-
Close the interceptor device.
-
Open the sealing screw of the gas valve
pressure tube connection indicated with
“Pin”.
-
Connect the manometer.
-
Open the interceptor device.
