Bosch NCT 675 N Directions For Use Manual page 12

5.3 Regulation for natural gas
The hob has been inspected for G20 (2H) natural gas at a pressure of
20 mbar. To allow the unit to work with this type of gas, perform the same
operations described in paragraph "5.2 Regulation for LPG", but choose
the nozzles and regulate the primary air for natural gas, as shown in the
following table and in paragraph "5.4 Regulation of primary air". After the
regulations have been carried out, restore the seals with sealing wax or
equivalent material.
Burner
Auxiliary (1)
Semi-rapid (2)
Average rapid (3)
Large rapid (4)
Triple crown (5)
Triple crown (6)
Double crown internal (7)
external (7)
5.4 Regulation of primary air
Referred to distance "X" in mm.
BURNER
Auxiliary (1)
Semi-rapid (2)
Average rapid (3)
Large rapid (4)
Triple crown (5)
Triple crown (6)
Double crown
Instructions for the installer
Rated heating
capacity
(kW)
1.05
1.65
2.55
3.1
3.9
3.3
0.8
3.3
internal (7)
external (7)
Natural gas – G20 20 mbar
Nozzle diameter
1/100 mm
73
92
115
126
140
130
67
130
G20
20 mbar
1.5
1.5
1
1.5
2
1
0.5
1
Reduced flowrate
(W)
380
380
750
800
1400
1400
380
900
G30/G31
28/37 mbar
1
1.5
1.5
2.5
3.5
2.5
1.5
4
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