Connection With Gas Network; Exhaust Of Burnt Gases; Underhood Installation And Forced Exhaust; Starting Procedure - Nordcap GRK9 Manual Del Usuario

of the power cord can be gained after the following
operations:
• Remove the front panel.
• Remove the cap of the box protecting the terminal
strip.
• Insert the cable and connect it with the terminal
strip according to what indicated in the wiring
diagram; then fasten it with the strain relief. Cover
the box again with the cap.
• Connect the equipotential wire with terminal
• Reassemble the panel.

5.5 - CONNECTION WITH GAS NETWORK

• Before connecting the equipment with the gas
network, check on the data plate that the
equipment has been designed for the type of gas
available by the user. Otherwise, follow the
indications of section 6.4 "Adaptation to another
type of gas".
• A quick-closing shut-off valve has to be inserted
before each appliance in a place of easy access.
• This connection must always be performed with 3-
piece connectors for an easy disassembly. Pipes
must be of galvanized metal or of copper and they
will be well visible. Even flexible hoses can be used
provided they are of stainless steel.
• After connecting the equipment, check
tightness of the joints with a foaming spray.
• Remember that the air needed for combustion is
3
equal to 2 m /h per kW of installed power and that
the Standards of accident prevention must be
complied with.

5.6 - EXHAUST OF BURNT GASES

5.6.1 - Underhood installation and forced
exhaust
• This appliance is classified as A1, therefore it
must compulsorily be positioned under an extractor hood so that fumes and vapours
emitted during the cooking can be extracted.
• The gas supply must be interlocked directly with
the system of forced exhaust and it must be cut
off when its flow rate is reduced below the values
stated by the standards. Then the gas must be
supplied again to the equipment only manually.
• The system flow rate per hour must be equal to
at least 1,72 m³/h per kW referred to the total
rated thermal output of power consuming
appliances present in the installation room, it
being understood that the air exchange of the
installation room can be sized for other aims not
exclusively concerning the safety of the systems
burning gas fuel.
Exhaust of fumes must not be prevented by
obstructions.
6 – STARTING PROCEDURE
As regards the ignition of burners, refer to the chapter
of "OPERATING INSTRUCTIONS".
CAUTION!
Before lighting the burners, make sure that the
jacket is filled with water up to the maximum level
(refer to chapter II, section 3).
6.1- CONTROLLING
PRESSURE (Fig. 4)
The supply pressure can be measured with a U-tube
or electronic pressure gauge with minimum resolution
. of 0,1 mbar.
• Remove the control board unscrewing the fastening
screws and leave it hanging on its supports.
• Unscrew the screw "F" of the pressure intake on
the gas valve.
• Insert the pressure gauge.
• Light the burner and check that the pressure is that
indicated in Table 5.
• Once ended the operation, reassemble and check
the tightness.
If the connection pressure is not included in the range
indicated in Table 5, the equipment cannot guarantee
a good operation. In this case, inform the gas
distribution company.
6.2 - PRIMARY AIR ADJUSTMENT (Fig. 7)
Primary air is adjusted exactly when the flame is
kept on even with cold burner and there is no
the
backdraught with hot burner.
• Remove the front panel unscrewing the fastening
screws.
• Adjust the primary air making ring "C" slip after
loosening screw "D".
• The adjusting measure H is indicated in table 4,
according to the type of gas.

6.3 - ADJUSTING THE PILOT BURNER

• Check that the flame wraps up the thermocouple
and its aspect is correct. If this is not the case,
check that the assembled nozzle is that designed
for the line gas (refer to table 4)

6.4 - ADAPTATION TO ANOTHER TYPE OF GAS

This equipment can also work with a different gas
from that chosen by the manufacturer; for instance, it
can be enabled to burn liquid gas instead of natural
gas; in this case it is necessary to replace the nozzles
of the main burners, of pilot burner, of ignition burner
and of the minimum flow bypass valve (refer to Table
4). All the necessary nozzles for this adjustment are
available in a small bag supplied with the equipment.
Note: after adapting the equipment to a different
type of gas from that chosen by the manufacturer,
apply the right sticker (available in the bag of
nozzles), referred to the new type of gas, onto the
data plate covering the previous indications.

6.4.1 - Replacing the nozzles of main burners

(Fig. 7)
• Remove the front panel.
• Unscrew the screw "A" on every burner. Remove
nozzle "B" and replace it with that suitable for the
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DOC. NO. 5958 9AY00
Edition 1 - 01.2013
THE CONNECTION