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These actions must be carried out by a qualified technician.
1
Package list
Boilers DTG 320-... S
Boilers DTG 330-... S
Natural gas L/LL
H 13mbar
Natural gas H/E
2
Changing the burner injectors
3
Changing the injectors on the principal burner
Cut the electricity and gas supply to the boiler.
Remove the gas supply pipe from the ignition burner (13 mm
spanner).
Remove the nozzle + seal.
16
8
9
10
GD134
GD135
GD136
GD144
GD145
GD146
A + B Lift out the injector with a number 12 spanner assemble the
new injectors with their new joint.
C Pressure socket
C
- Fit the unit together (13 spanner)
GD 134-142 + 144-152
11
12
14
GD137
GD138
GD139
GD147
GD148
GD149
Cut the electricity and gas supply to the boiler.
Natural gas H/E
Natural gas L/LL
H 13mbar
Reassembly:
Correctly replace the seals.
First tighten the injectors by hand and carefully lock them using
a spanner.
Carry out a gas tightness check.
Unscrew the nozzle using a screwdriver and screw in the new
injector.
Natural gas H/E
Natural gas L/LL
H 13mbar
Carry out a gas tightness check
16
18
20
GD140
GD141
GD142
GD150
GD151
GD152
Nozzle
Injector marking
Ø 3.90 mm
390 A
Ø 4.50 mm
450 A
Nozzle
Injector marking
Ø 0.8 mm
80
Ø 1 mm
100
23/05/2011 - 94858363 - 8358-4322F