27
sting cam as to reach the minimum output point: gradually move the adjusting cam in order to adjust each of the
V
screws as to
describe the cam foil shape.
15 to change the
SV
position set the actuator on the manual mode (MAN), turn the adjusting cam
SV
and set again the actuator to the
AUTO mode to lock the adjusting cam;
16 act on the
V
screw that mathces the bearings referring to the adjusting cam position;
17 to adjust the next screw, set again the actuator mode to
MAN
, turn the adjusting cam and set the actuator to
AUTO
mode to lock
the adjusting cam on the next screw; adjust it and go on this way to adjust all the screws in order to set the cam foil shape, accor-
ding to the combustion values read.
18 Once the cam foil shape is defined, reconnect the
TAB
thermostat reconnecting the wire to the terminal no.6 or setting the RWF40
burner modulator to AUTO or the CMF switch to 3 (only for fully-modulating burner).
19 Turn the burner off then start it up again.
20 Once the pre-purge time comes to end, drive the burner to the high flame stage by the
TAB
thermostat: check the combustion
values;
21 drive the burner to low flame, if necessary adjust the low flame size (output) by inserting a screwdriver on the slot
FA
to move the
BF
cam.
22 The low flame position must never match the ignition position that is why cam
BF
must be set 20°- 30° more than the ignition posi-
tion.
NOTE:
to change the low flame position, act exclusively on the actuator cam.
Now adjust the pressure switch (see page 28).
ID
SC
RP
SV
V
BF
FA
