C.I.B. UNIGAS - M039140CE
35
dics nozzles - see page 45-30).
10 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 previous 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.
11 as for the point-to-point regulation in order to set the cam foil shape, move the oil low flame microswitch (cam V) a little lower than
the maximum position (90°);
12 set the
TAB
thermostat to the minimum
(as far as fully-modulating burners, see related paragraph) in order that the actuator
moves progressively towards the low flame position;
13 move ”low flame” cam IV(SQM40..) / V (STM30..) towards the minimum to move the actuator towards the low flame until the two
bearings find the adjusting screw that refers to a lower position: screw
V2
to increase the rate, unscrew to decrease, in order to get
the pressure as showed on chart/diagram on “Adjusting light oil flow rate” on page 32, according to the requested rate.
14 Move again cam IV / V 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 cam I
V / V
must be set 20°- 30° more than the ignition
position.
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 39).
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. 23) 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
- see picture on pag.34);
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.
Fig. 24
Fig. 25
SQL33.. actuator cams
A = (red) cam locking lever for “high flame”
S = (green) cam locking lever for “stand-by and
ignition”
F = plastic cam
BF1 = Low flame (gas)
BF2 = Low flame (oil)
Pressure gauge port
RP
PG
V2
SV2
CP
MAN
AUTO
BF
F
A
S
BF2
AB
BF1
Summary of Contents for HP91A
Page 45: ...C I B UNIGAS M039140CE 45 ...
Page 53: ...E039140CA Rev 0 12 2009 WIRING DIAGRAMS ...
Page 55: ......
Page 56: ......
Page 57: ......
Page 58: ......
Page 59: ......
Page 60: ......
Page 61: ......
Page 62: ......
Page 63: ......
Page 64: ......
Page 65: ......
Page 66: ......
Page 67: ......
Page 68: ......
Page 69: ......
Page 70: ......
Page 71: ......
Page 73: ......
Page 74: ......
Page 75: ......
Page 76: ......
Page 77: ......
Page 78: ......
Page 79: ......
Page 80: ......
Page 81: ......
Page 82: ......
Page 83: ......
Page 84: ......
Page 85: ......
Page 86: ......
Page 87: ......