Connection To The Water Supply; Switching On; Checking The Nominal Thermal Input; Checking The Gas Connection Pressure - Hobart 6 GN1/1 Instalacion, Uso Y Mantenimiento

4.1 INSTALLING THE POWER CABLE
(fig. 13)
To connect the power cable to the appliance proceed as follows:
• Remove the 2 screws "V" which fasten the terminal board
holding panel located on the front left-hand side at the bottom of
the appliance.
• Pass the power cable through the cable clamp "B".
• Connect the cable to the terminal board "A" as shown in the
wiring diagram supplied with the appliance and tighten the cable
clamp.
• Replace the terminal board holding panel.
The manufacturer accepts no liability for situations arising
from failure to comply with these safety rules.
5.

CONNECTION TO THE WATER SUPPLY

Connect the water inlet pipes "F" and "D" to the water mains and
insert a mechanical filter and a cutoff cock between the appliance
and the mains.
Before connecting the filter allow a certain amount of water to run
off in order to clean the pipe of any eventual ferrous slags.
• The steam production water inlet "D", should be supplied with
drinking water with the following characteristics:
- A hardness of between 0,5 and 5 °F, in order to reduce the
build-up of calcium inside the steam generator and in the cham-
ber for models with instantaneous steam generation.
To this end an automatically regenerating water softening device
( to be fitted to the water inlet piping "D") is available . This device
can also be supplied with a resin sterilisation kit (available on
request).
- a non excessive chloride ion concentration (an acceptable
level would be ~10 ppm), so as not to attack the internal steel
surfaces of the appliance.
To this end a special filter unit (to be fitted to the water inlet piping
"D" ) is available. This unit also reduces the hardness of the water
to the optimum level (less than 5°F), functioning as a water
softener.
- a pressure of between 150 and 250 kPa (1,5 to 2,5 bar).
• The water inlet "F", supplying the vapour damping system can
be supplied with normal water, non excessively hard, and at a
pressure of about 200 kPa (2 bar); higher pressure levels will lead
to exorbitant water consumption.
5.1 Condensate water drainage (fig. 5)
The boiler "C" and oven chamber condensate water drainage
piping "E" can directed either sideways or, if the oven is not to be
installed with its back against the wall, it can be directed towards
the rear (excluding the area taken up by the tray rack support ).
This piping either rigid or flexible must be channelled into an open
syphon drain "O" or directly over drainage grid.
The internal diameter of the pipe must not be less than that of the
oven drainage pipe and must be resistant to temperatures of
100°C.
Avoid sharp bends in the flexible pipes and elbow joints in the
metal pipes throughout the drainage course. The water drainage
piping "E" must not be longer than 1 mt. .
6.

SWITCHING ON

6.1.

CHECKING THE NOMINAL THERMAL INPUT

The thermal input of the appliance must be checked, following
these indications, by an authorised installer or by the gas board
both for new installations and when adapting to different types of
gas and after all maintenance interventions. Further adjustment
of the nominal thermal input is not required.
Nominal thermal input
Steam generator burner
Convection burner
The operation of the appliance using nominal thermal input is
obtained by measuring the correct connection pressure and by
ensuring that the appropriate type of gas injector is being used.
The operations required to obtain this result are described in the
following paragraphs. After verifying the nominal thermal input an
operational check should be carried out as described in para-
graph 9.
kW 8,5
kW 10,5
6.2. CHECKING THE GAS CONNECTION PRESSURE (fig.6)
• Before connecting make sure that the appliance is compatible
with the type of gas available otherwise follow the instructions in
the paragraph "adapting to different gas types".
The gas connection pressure should be measured while the
appliance is operating using a "U" - shaped pressure gauge
(minimum resolution = 0,1 mbar) proceeding as follows:
• Remove the left hand side panel.
• Remove the sealing screw "C" from the gas valve pressure port
and connect the pressure gauge pipe.
If the connection pressure doesn't fall within required range (see
the following table) do not attempt to operate the appliance.
Inform the gas board of this situation.
Type of gas
Natural gas G20
(fig.1)
L.P.G. G30/G31
After having measured the gas pressure remove the U-shaped
pressure gauge and replace the sealing screw.
7.

ADAPTING TO DIFFERENT GAS TYPES

To adapt the appliance to operate off another type of gas
proceed as follows:
7.1 REPLACING THE CONVECTION BURNER GAS
INJECTOR (fig.7)
To gain access to the convection burner injector remove the
protective shield from the oven bottom by unscrewing the
fastening screws.
• Replace the injector "A" with one corresponding to the type of
gas chosen as indicated in the injector data table.
• Fasten down well.
7.1.1 REPLACING THE STEAM GENERATOR BURNER GAS
INJECTOR (fig.8)
To gain access to the boiler burner injector remove the protective
shield from the left hand oven bottom by unscrewing the
fastening screws.
To replace the injector proceed as follows:
• Loosen the screw "A" and unscrew the injector "C".
• Extract the injector and the air feed pipe.
• Replace the injector "C" with one corresponding to the type of
gas chosen as indicated in the injector data table.
• Insert the new injector into the air feed pipe and replace the two
components, make sure that the injector is well tightened.
• Position the air feed pipe and fasten down using the screw "A"
INJECTOR TABLE
Type of gas
Steam generator burner 1,50
Marking
Convection burner
Marking
• The injector diameter is indicated in hundredths of millimetres
and imprinted on the injector itself.
The gas valve has no minimum adjustment setting meaning that
the burner can only function in the ON/OFF mode.
The appliance has an electronic flame control device.
7.2. CHECKING THE PRIMARY AIR SUPPLY FOR THE
CONVECTION BURNER (fig.7).
The primary air supply is correctly adjusted when the flame does
not separate itself from the burner when it is cold and does not
blow back when the burner is hot.
To adjust the primary air supply proceed as follows:
• Loosen the screw "D" and position the air shutter "C" at the
distance "H" respecting the following indications:
L.P.G. G30/G31
Natural gas G20
• Replace, tighten and seal the screw "D"
11
Pressure in mbar
Nom. Min. Max.
20 17 25
28-30/37 20/25 35/45
L.P.G. Natural gas
G30/G31 G20
Ø mm Ø mm
Max. Max.
2,30
150 230
1,65 2,50
165 250
H=mm 12
H=mm 12