ELECTRODES ADJUSTMENT
The position of the electrodes should always be checked after any work on the combustion
head. They should be positioned according to the indications supplied in the figure below.
IMPORTANT: the ignition electrodes and the control electrode must never touch the
diffuser, the draught tube or other metallic parts. If this were to happen they would no
longer work, thus impairing operation of the burner itself.
WIRING DIAGRAM
WARNING:
- Do not invert the neutral with the phase.
- Make the connection to an effi cient earthing system.
- The electrical power line to the burner must be fi tted with an omnipolar switch with an ope-
ning of at least 3 mm between the contacts.
- The earth connection to the terminal board of the burner must be made with a cable at
least 20 mm longer than the phase and neutral cables.
- Must be workmanlike performed and comply with the regulations in force.
NOTE: Always make sure that no more than two wires are connected to each terminal.
CM Air actuator
connector
EC
Control electrode
F
Fuse
FA
Anti-interferencs
filter
IG
Main switch
MA Control box terminal
board
MB Burner motor
MS Air servocontrol
terminal board
MV Detachable
terminal
PA
Air pressure switch
PGm Minimun gas
pressure switch
TC
Boiler thermostat
TS
Safety thermostat
Tmf 2
stage modula-
nd
tion thermostat
(if present)
TR
Ignition
transformer
VP
Main work valve
VS
Safety valve
Control electrode
M
M
UK
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