GAS CONNECTION
The system must be equipped with all the accessories required by current regulations. We
recommend the following: always include a filter, do not apply mechanical strain to the com-
ponents and, therefore install a flexible joint as well as a pressure stabilizer and an intercep-
tion cock at the heating system inlet. The pipes must be laid using rigid pipes. Any flexible
pipes must be type approved.
Also bear in mind the necessary space required for carrying out maintenance operations on
the burner and the boiler. After fitting the valve unit on the burner, check that there are no gas
leaks during the first ignition stage.
ADJUSTMENTS
COMBUSTION HEAD ADJUSTMENT
EM 16/M-E
Adjust the combustion head by acting on the screw A accor-
ding to the indications shown on the index.
COMBUSTION HEAD ADJUSTMENT EM 26/M-E
- Loosen the knobs B.
- Acting on these modifies the position of the draught
tube with respect to the combustion head. Lining
knobs up with values 1, 2 or 3 gives minimum, me-
dium and maximum burner delivery respectively.
- Once adjustment has been completed tighten the
knobs B.
UK
Servocontrol
COMBUSTION AIR ADJUSTMENT
The air shutter is operated by a gearmotor. To adjust the
closed/open and first stage/max. aperture positions act on
the cams by turning them anticlockwise to increase the air
shutter opening and clockwise to decrease the air shutter
opening.
Red
Blue
Blue cam
Orange
Orange cam
Black
Red cam
Black cam
42
Reference index
Total closing position
First stage start adjustment
Second stage start adjustment
Second stage VE2 opening go-ahead
M
M