Unigas HTP512A, Installation, User'S, And Maintenance Manual

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C.I.B. UNIGAS - M039219CA
35
8 manually drive the adjusting cam SV2 to the high flame position and set the actuator to the AUTO mode (by the related switch - see
picture) to lock the adjusting cam.
The nozzle supply 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. 34 and act on on the pump adjusting screw
VR (see Fig.
31 and page 20) as to get the nozzle pressure at 20 bar or 25bar (according to the nozzle model provided: Bergonzo or Fluidics nozz-
les - see page 32-33).
9 in order to get the maximum oil flow rate, adjust the pressure (reading its value on the PG pressure gauge) without changing the air
flow rate set during the gas operation adjustments (see prevoius paragraph): checking always the combustion parameters, the
adjustment is to be performed by means of the
SV2 adjusting cam screw (see picture) when the cam has reached the high flame
position.
10 once the air and oil flow rate have been adjusted at the maximum output, go on with the point to point adjustment on the SV2 adju-
sting cam as to reach the minimum output point: gradually move the adjusting cam in order to adjust each of the V2 screws as to
describe the cam foil shape.
11 to change the SV2 position set the actuator on the manual mode (MAN), turn the adjusting cam SV2 and set again the actuator to
the AUTO mode to lock the adjusting cam;
12 act on the V2 screw that mathces the bearings referring to the adjusting cam position;
13 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.
14 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).
15 Turn the burner off then start it up again.
16 Once the pre-purge time comes to end, drive the burner to the high flame stage by the TAB thermostat: check the combustion
values;
17 drive the burner to low flame, if necessary adjust the low flame size (output) by inserting a screwdriver on the slot F to move the
BF2 cam.
SQL33.. actuator cams
AB = High flame
BF1 = Low flame (gas)
BF2 = Low flame (oil)
B = plastic clamp
G = cam locking lever
Fig. 34 Fig. 35
MAN
AUTO
AB
B
G
BF2
AB
BF1
Pressure gauge port
RP
PG
V2
SV2
BF2
F