Unigas HP60, Manual Of Installation - Use - Maintenance

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C.I.B. UNIGAS - M03957CI
28
Settings by means of Berger STM30../Siemens SQM40.. actuator
1 ;set GAS fuel by means of the burner CM switch (it is placed on the burner control panel - see page 39)
2 open the electrical panel to check the fan motor rotation (see paragraph page 24)
3 Only for burners provided with Multibloc MB-DLE gas valves: before starting the burner up, set the slow opening. To set the slow
opening, remove cover T , reverse it upside down and use it as a tool to rotate screw VR . Clockwise rotation reduces start flow rate,
anticlockwise rotation increases it. Do not use a screwdriver on the screw VR !
Note: the screw VSB must be removed only in case of replacement of the coil.
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 safely achieve the high flame stage.
5 Start the burner up by means of the thermostat series and wait until the pre-purge time comes to an end and that the burner starts
up;
6 drive the burner to high flame stage, by means fo the thermostat TAB (high/low flame thermostat - see Wiring diagrams), as far as
fully-modulating burners, see related paragraph.drive the burner to high flame stage, by means fo the thermostat TAB ; as far as
Fully-modulating burners, see next paragraphs.
7 Then move progressively the microswitch to higher values until it reaches the high flame position; always check the combustion
values and eventually adjusting the gas by means of the valves group stabiliser.
8 go on adjusting air and gas flow rates: check, continuosly, the flue gas analisys, as to avoid combustion with little air; dose the air
according to the gas flow rate change following the steps quoted below;
9 acting on the pressure stabiliser of the valves group, adjust the gas flow rate in the high flame stage as to meet the values
requested by the boiler/utilisation:
- Multibloc MB-DLE: The pressure governor is adjusted by operating the screw VS located under the cover C . By screwing down
the pressure is increased and by unscrewing it is reduced. The valve is adjusted by means of the RP regulator after slackening the
locking screw VB by a number of turns. By unscrewing the regulator RP the valve opens, screwing the valve closes.
- Siemens VGD valves group: remove cap T and act on the VR adjusting screw to increase or decrease the pressure and conse-
quently the gas rate; screwind VR the rate increases, unscrewing it decreases (see next figure).
- Dungs MBC..SE valves group: act on its pressure governor to increase or decrease the pressure and consequently the gas
rate.
10 To adjust the air flow rate in the high flame stage , loose the RA nut and screw VRA as to get the desired air flow rate: moving
the rod TR towards the air damper shaft, the air damper opens and consequently the air flow rate increases, moving it far from the
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..)
MAN-AUTO
mensions
Dimensions in
SQM4...
I
III
II
IV
V
VI VI
V
IV
II
III
I
MAN-AUTO
VR
T
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$MÏEFTJYQBOTNÉMFOP
$IJBWFFTBHPOBMFDBWBOS
1
#S
Siemens VGD..
Dungs MBC..SE
C VS
T(VR)
VB
VSB
Dungs Multibloc MB-DLE
RP
Fig. 33