Unigas HTP90A, Manual Of Installation - Use - Maintenance

Page: 41 / 84

41
Oil Flow Rate Settings by means of Berger STM30.. actuator
1 Once the air and gas flow rates are adjusted, turn the burner off, switch it on again by turning the CM switch to the oil operation
(OIL, on the burner control panel).
2 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;
3 bleed the air from the M pressure gauge port (Fig. 17) by loosing the cap without removing it, then release the contactor.
Fig. 17
4 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 achieve safely the high flame stage .
5 record the high flame value set during the gas operation adjustments (see previous paragraphs);
6 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;
7 drive the burner to high flame stage, by means fo the thermostat TAB .
8 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).
9 the nozzle suplly pressureis already factory-set and must not be changed. Only if necessary, adjust the supply pressure as follows
(see related paragraph);insert a pressure gauge into the port shown on Fig. 18 and act on on the pump adjusting screw
VR (see
Fig. 17 and page 21) as to get the nozzle pressure at 20 bar or 25bar (according to the nozzle model provided: Bergonzo or Flui-
dics nozzles - see page 32-33).
Suntec TA.. Suntec T.. HP Technik UHE
Berger STM30
Siemens SQM40
Actuator cams
I High flame
II Stand-by and Ignition
III Low flame - gas
IV Low flame - oil (SQM40..)
V Low flame - oil (STM30..)
CP
VR
M
M
VR
VR VR
M
I D
MAN-AUTO
mensions
Dimensions in
SQM4...
I
III
II
IV
V
VI VI
V
IV
II
III
I
MAN-AUTO