
E170701X.01_ENG 16/04/18
12
ATTENTION!
It is forbidden to use free flame for tightness
test!
13. GAS CONNECTION: THERMAL POWER
Each dryer tested in the factory is prepared for a
kind of gas that is written in the sticker near the
serial number plate.
If the machine is predisposed for a gas that does
not correspond to the kind available in the
installation place, then it is compulsory to make
the dryer adaptation. In this case, the authorized
after sales center must be informed.
A dryer that is working with the expected thermal
power depends on the inlet pressure and the gas
calorific power, but also depends 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. If 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
table values, please contact the gas company or
the company that realized 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.
14. GAS CONNECTION: GAS INLET
PRESSURE CONTROL
The inlet gas pressure must be controlled using a
digital or liquid measuring tool (resolution of 0.1
mbar at least).
- Close the interception device.
- Open the sealing screw on the pressure tube
gas valve connection indicated as “Pin”.
- Connect the manometer
- Open the interceptor device
- Start the dryer following the user instruction
- Check the inlet pressure, with the burner
working.
- Switch off the dryer.
- Close the interception device.
- Take off the monometre.
- Close the screw of the gas valve pressure
tube and control the tightness.
- Open the interceptor device and control test
the tightness.
The dryer must not be used if the gas pressure is
out of the limit shown in the reference table.
15. GAS CONNECTION: FINAL TEST
Once the connection works are completed, the
equipment and the installation must be tested. It is
necessary to test:
-That the connection are made respecting the
instructions written in this manual;
-That the safety rules and the laws about this
subject are respected;
-That gas connections are tightness tested.
Switch on the machine following the user manual
instructions controlling the burner lighting on and
the flame aspect.
Do a gas test with the volumetric method. Using
the gas regulator, control how much gas was used
in a fixed time unit: this value must be compared
with the values in the tables.
16. HUMID AIR AND BURN GAS EXAUST
The humid air and burns gas exhaust system
must be realized following the rules in force.
To avoid lack of humid air and noise, the exhaust
joints to the outside must be made tight with high
temperature resistant material (filler, putty,
silicone preparation).
To avoid leakage, don’t use spiral ducts: use
straight metallic and rigid tubes therefore. The
material used must be compatible with the
exhaust temperatures of the machine. Gas heated
tumble dryer are B22 equipment, it means they
are gas equipment which depend on an aired
room without any wind protection device with
blower behind the burning room.
Dryer burned gas must be brought outside
through a chimney.
Burnt gas and humid air pipe must be the shortest
possible one and it must be rising to the exhaust
chimney. To reduce load losses, don’t use curves
at 90 °, preferring two 45 ° curves.
A condenser drain must be provided in the lowest
point. This drain derivation must observe local
rules of water drain connection.
Te duct must resist to any crush. In case of a
manifold, don’t use "T" connections and consider
the correct value of the manifold section. If
necessary, increase the manifold section.