Regulation For Lpg - Bosch NCT 675 N Directions For Use Manual

5.2 Regulation for LPG

Loosen screw A and push support B all the way. Use a double head
wrench to remove nozzle C and assemble the suitable one, following the
instructions indicated in the reference charts, with respect to the type of
gas to use. The screwing torque of the nozzle should never exceed
3 Nm. Reposition support B so that nozzle C is covered perfectly.
Move the Venturi tube D to regulate the air flow until distance "X" is
reached indicated in the chart in paragraph "5.4 Regulation of primary air"
and then secure the tube by means of screw A. 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)
(*) By-pass value for valveless appliances.
26
Instructions for the installer
Rated
heating
capacity
(kW)
diameter
1/100 mm
1.05
1.65
2.55
3.1
3.9
3.3
0.8
3.3
LPG – G30/G31 28/37 mbar
Nozzle By-pass
mm
1/100
48 30 33 (*)
62 30 33 (*)
76 37 40 (*)
85 45
95 65
87 65
42 26 33 (*)
87 55
Reduced Flowrate
flowrate g/h G30
(W)
380 76
380 120
750 185
800 225
1700 283
1700 240
380 58
1200 240
Flowrate
g/h G31
75
118
182
222
279
236
57
236