26
Attention!
if it is necessary to change the head position, repeat the air and gas adjustments described above.
14 the air and oil rate are now adjusted at the maximum power stage, go on with the point to point adjustement on the
SV
adjusting
cam as to reach the minimum output point.
15 as for the point-to-point regulation in order to set the cam foil shape, move the low flame microswitch (cam III) a little lower than the
maximum position (90°);
16 set the
TAB
thermostat to the minimum in order that the actuator moves progressively towards the low flame position;
17 move cam III (low flame) towards the minimum to move the actuator towards the low flame until the two bearings find the adjusting
screw that refers to a lower position: screw
V
to increase the rate, unscrew to decrease, in order to get the pressure as shown on
diagram, according to the requested rate.
18 Move again cam III towards the minimum to meet the next screw on the adjusting cam and repeat the previous step; go on this way
as to reach the desired low flame point.
19 The low flame position must never match the ignition position that is why cam
III
must be set 20°- 30° more than the ignition posi-
tion.
Turn the burner off; then start it up again. If the adjustment is not correct, repeat the previous steps.
Fully modulating burners
To adjust the fully-modulating burners, use the
CMF
switch on the burner control panel (see next picture), instead of the
TAB
thermo-
stat as described on the previous paragraphs about the progressive burners. Go on adjusting the burner as described before, paying
attention to use the CMF switch intead of
TAB
.
The
CMF
position sets the oprating stages: to drive the burner to the high-flame stage, set CMF=1; to drive it to the low-flame stage, set
CMF=2.
To move the adjusting cam set CMF=1 or CMF=2 and then CMF=0.
CMF = 0 stop
CMF = 1 high flame operation
CMF = 2 high flame operation flame operation
CMF = 3 automatic operation
”MIN” position
”MAX” position)
VB
VRT
RP
V
SV
Содержание TG90
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