C.I.B. UNIGAS
- M039213CB
35
14 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.
15 The low flame position must never match the ignition position that is why this cam 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.
Adjustment by the Siemens SQL33.. actuator
1
Once the air and gas flow rates are adjusted, turn the burner off, switch the
CM
switch to the heavy oil operation (OIL, on the bur-
ner control panel (see page 38).
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. 22) by loosing the cap without removing it, then release the contactor.
4
record the high flame value set during the gas operation adjustments (see prevoius paragraphs);
5
Start the burner up by means of the thermostat series and wait unitl the pre-purge phase comes to end and that burner starts up;
6
the burner starts up with the actuator on the ignition position, set it to the
MAN
(manual mode), by the
MAN/AUTO
selector (ignition
position= read on the air damper index
ID1
);
7
disconnect the
TAB
thermostat removing the wire from the terminal no. 6 or by setting MAN on the RWF40 modulatore or by set-
ting 0 by means of the
CMF
switch (only for fully-modulating burners);
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. 24 and act on on the pump adjusting screw
VR
(see Fig.
22 and page 22) as to get the nozzle pressure at 25bar (Fluidics nozzles - see page 33).
SQL33.. actuator cams
A = (red) cam locking lever for “high flame”
S = (green) cam locking lever for “stand-by and
ignition”
BF1 = Low flame (GAS)
BF2 = Low flame (OIL)
F = plastic cam
CP
MAN
AUT
BF
F
A
S
BF2
AB
BF1
Summary of Contents for HR93A
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