PART III: OPERATION
29
actuator will close to the new position of ST1;
12 to increase the low flame position, move the cam higher to the required position, make the bridge between the 6 and 7 terminals
only for a while and then remove it immediately: the actuator will move for just few degrees towards the high flame, then it will move
down to the new ST1 low flame position;
13 now, charge the oil ciruit of the second nozzle by pressing the P1 button (see next picture);
14 the 3rd cam drives the opening of the 2nd stage solenoid valve (EVG2) and must be set between the other two cams, however
near to ST1;
15 The cycle goes on and il the thermostat
TAB
is connected, the control box drives the burner to high flame. If there is not theTAB
thermostat, place a bridge between terminals 6 and 7 on the MA terminal block (see picture above).
16 By means of ST2 cam, adjust the air flow rate in high flame stage;
17 to increase the high flame position (and consequently to increase the degrees), move the cam to a higher position: the actuator will
move to the new ST2 position;
18 to decrease the high flame position, move the cam to a lower position, remove the bridge between 6 and 7 terminals only for a
while, then replace it: the actuator will shift just few degrees towards the low flame position and then will move to the new high
flame position.
19 Once the adjustmet is performed, check again that the combustion parameters are in the set limits.
20 Replace the actuator cover.
Progressive burners
Oil Flow Rate Settings by means of Siemens SQM40.. actuator
1
with the electrical panel open, prime the oil pump acting directly on the related
CP
contactor (see next picture): check the pump
motor rotation and keep pressing for some seconds until the oil circuit is charged;
2
bleed the air from the
M
pressure gauge port by loosing the cap without removing it, then release the contactor.
Fig. 13
3
Before starting the burner up, drive the high flame actuator microswitch matching the low flame one (in order to let the burner ope-
rates at the lowest output) to safely achieve the high flame stage .
4
Start the burner up by means of the thermostat series and wait until the pre-purge time comes to an end and that the bruner starts
up;
5
drive the burner to high flame stage, by means fo the thermostat
TAB
(as far as fully-modulating burners, see the related para-
graph).
6
Then move progressively the microswitch to higher values until it reaches the high flame position; always check the combustion
values and eventually adjusting the oil pressure (see next step).
Suntec E.. / J..
P1
MA
CP
VR
M
