Unigas E115X, Руководство по установке, использованию и обслуживанию, Страница: 30 / 80

PART III: OPERATION
30
On the BERGER STA12B3.41 actuator, the manual air damper control is not provided. On the Siemens actuator the AUTO/MAN mode
is provided (see picture).
Progressive burners
Once the procedure till step 8 described on paragraph “Adjustment procedure” on page 10, is accomplished, go on as follows:
9 set the low flame cam matching the high flame cam;
10 set the
TAB thermostat to the minimum in order that the actuator moves progressively towards the low flame position;
The manual air damper control is not provided on these actuators. The adjustments must be carried out acting manually on the cams.
SQM40.265 CSV Actuator cams
11 move the low flame cam to the minimum to move the actuator towards the low flame until the two bearings find the adjusting screw
that refers to the lower position: screw V to increase the rate, unscrew to decrease.
12 Move again the low flame cam 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.
13 Now adjust the pressure switches.
14 If it is necessary to change the burner output in the low flame stage, move the low flame cam: the low flame position matches the
ignition position. As far as burners fitted with Dungs MBC gas valves, the low flame cam does not match the ignition cam position,
that is why it must be set at about 30° more than the ignition cam.
15 Turn the burner off and then start it up again. If the adjustment is not correct, repeat the previous steps.
MAN-AUTO
(RD) I
High flame
(BU) II
Stand-by
(OG) III
Low flame - gas
(YE) IV
Low flame - oil
(BK) V
Ignition - oil
(GN) VI
Ignition - gas
VF
SC
SV
ID
V
SV
Gas butterfly valve clo
s
ed
Gas butterfly valve open
MAX
MIN
AUTO
MAN.
SMA SMF
SMA
MAN
AUTO automatic operation
SMF
MIN low flame operation
0
MAX high flame operation