Operation; Adjustment - Nordcap MORETTI T75G Mode D'emploi

These appliances must also be included in the equipotential system;
the terminal to be used for this purpose is located at the back of the
appliance (fig.20 item W) marked with the symbol TERMINAL FOR
EQUIPOTENTIAL CONNECTION.
When connection has been completed, check that the supply voltage,
with the appliance running, does not differ from the rated value by
more than ±5%.
WARNING!
When disconnecting from the power mains,
after switching off the appliance, wait at least 15 MINUTES
before unplugging it in order to allow the electronic circuits inlet
condensers to discharge.
Never touch the plug contacts under any circumstances.
3

OPERATION

WARNING!
Before
programming of the appliance, always check that:
all electrical and earthing connections have been properly made;
all gas connections have been properly made;
the exhausting and air inlet systems are efficient;
all control operations must be carried out by specialised
technicians holding a valid license.
When required, pressure must be measured using a pressure
gauge with a minimum resolution of 0.1 mbar.
WARNING!
For TT98G all the following operations
must be performed on both burners
3.1 PRELIMINARY CONTROL OPERATIONS
3.1.1 CHECKING NOZZLES
Check that the oven (rated gas category and type) is set up for the type
and family of gas supplied.
Otherwise change the available gas type,
using the procedure described in section 3.4.
The oven must be put operated with the settings and nozzles foreseen
for the rated thermal capacity (see technical data TAB.1).
WARNING!
The valve adjustment screws must not be
tampered with: they are calibrated and sealed in the factory.
3.1.2 CHECKING THERMAL CAPACITY WITH LPG (G30-
G31)
The rated thermal capacity is achieved with the nozzles indicated in the
table (see technical data TAB.1), the gas on the Venturi cone (fig.22)
must be set at X= see technical data TAB.1
WARNING!
The internal parameters must be the ones
foreseen for the type of supply gas (section 3.4.4).
Operation depends on the inflow pressure available (see technical data
TAB.1):
Should the pressure be outside the values indicated above, advise those
responsible for the system and do not start up the oven until the cause
has been traced and eliminated.
3.1.3 CHECKING THERMAL CAPACITY WITH METHANE
GAS (G20-G25-G25.1)
The rated thermal capacity is reached without the need for nozzles,
the gas on the Venturi cone (fig.22) must be set at X = see technical
data TAB.1..
WARNING!
The internal parameters must be the ones
provided for the type of gas supply (section 3.4.4).
Operation depends on the inflow pressure available (see technical data
TAB.1):
If the infeed pressure is not within the values indicated, advise the
gas supply company and do not start up the oven until the cause has
been traced and eliminated.
NOTE:
Should an additional test be required for the thermal
capacity, use the volumetric method.
3.2

ADJUSTMENT:

commencing start-up and
3.2.1 PRELIMINARY CONTROLS AND ADJUSTMENT:
The appliance leaves the factory ready-calibrated and tested for the
type of gas required, however it is always advisable to check that the
type of gas and pressures at the burner are correct. If this is not the case,
follow the procedure described in the points below.
3.2.2 PRESSURE TEST POINT
(Per Australia=minimum supply pressure in kPa)
Make the operation as follows:
- Remove the burner cover (fig. 20 item M).
- Loosen the retention screw inside the gas valve infeed pressure
takeoff (fig. 23 item W)
- Connect the pressure gauge to the pressure takeoff.
- Turn the appliance on as indicated in the instructions.
- Measure the pressure, which must be within the values indicated in
TAB.1 technical data.
NOTE:
The pressure must be read with all the chambers
working. Any other appliances or circumstances must never have a
long-term effect on the supply of gas to the appliance.
- Turn the appliance off as described in the instructions.
- Remove the pressure gauge.
- Fasten the retention screw (fig. 23 item W) tightly.
- Reassemble the burner cover (fig. 20 item M) and ensure there are no
holes where unfiltered air can flow (T75G).
3.2.3 ZEROING PRESSURE CONTROL
Make the operation as follows:
- Remove the burner cover (fig. 20 item M).
- Loosen the retention screw inside the gas valve output pressure
takeoff (fig. 27 item T)
- Connect the pressure gauge correctly reset to the pressure takeoff.
- Turn the appliance on as indicated in the instructions.
-At start-up the pressure value initially varies; wait until the burner is
lit, then check the pressure at that point. The value must be 0 mbar,
otherwise remove the gas valve
(cap fig. 28 item. U) and adjust the screw underneath (fig. 28 item Z)
until the pressure value reaches 0 mbar.
- Turn the appliance off as described in the instructions.
- Remove the pressure gauge.
- Fasten the retention screw (fig. 23 item W) tightly on the pressure
takeoff (fig.27 item.T).
-If removed, replace the cap on the gas valve (fig. 28 item U) and fix
the seal with a red heat-resistant paint.
- Reassemble the burner cover (fig. 20 item M) and ensure there are
no holes where unfiltered air can flow (T75G).
3.3 MONITORING OPERATION
Appliance start-up and commissioning
- Ensure smoke is evacuated appropriately.
- Ensure adequate ignition and stability of the burner flame
throughout the range of modulation through the burner flame
inspection window (fig. 21 item N).
WARNING!
TT98G to check the burner flames following the procedure in
point 5.3.1 and left (fig. 21 item Z); don't touch anything and
check the flames then close the side panels by following the
procedure in point 5. 3.4.
3.4 TRANSFORMATION AND/OR ADAPTATION TO
USE OTHER TYPES OF GAS.
WARNING!
performed by specialised technicians holding a valid license.
Before connecting the new gas system, check that the supply
pressure of the appliance is reported in TAB 1 and the above
pressure is guaranteed over time.
If the infeed pressure is not within the values indicated, advise the
gas supply company and do not start up the oven until the cause
has been traced and eliminated.
NOTE:
For the transformation and / or adaptation to
another type of gas system on TT98G placed on top of each other,
assemble / disassemble the nozzles and adjust the Venturi cone
before placing the chambers on top of each other to operate more
easily.
WARNING!
on both burners for TT98G
UK/5
Open the right side panels (fig. 21 item P) on
All the following control operations must be
All the following operations must be made