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

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C.I.B. UNIGAS - M039219CA
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- 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
shaft the air damper closes and the air flow rate decreases.
Note: once the procedure is perfomed, be sure that the blocking nut RA is fasten. Do not change the position of the air damper
rods.
11 the air and gas rate are now adjusted at the maximum output, go on with the point to point adjustment on the SV adjusting cam as
to reach the minimum output point: gradually move the adjusting cam in order to adjust each of the V screws as to set the cam foil
shape as described on the next steps:
12 to change the SV position set the actuator on the manual mode (MAN), turn the adjusting cam SV and set again the actuator to the
AUTO mode to lock the adjusting cam;
13 act on the V screw that mathces the bearings referring to the adjusting cam position;
14 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.
15 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).
16 Turn the burner off, then start it up again.
17 Once the pre-purge time comes to end, drive the burner to the high flame stage by the TAB thermostat and check the combustion
values;
18 drive the burner to low flame, if necessary adjust the low flame size (ouput) by inserting a screwdriver on the slot F to move the BF
cam.
19 The low flame position must never match the ignition position that is why cam BF must be set 20°- 30° more than the ignition posi-
tion (see ID1 index on previous pictures).
20 Now adjust the pressure switches (see next paragraph).
Fully modulating burners
To adjust the fully-modulating burners, use the CMF switch on the burner control panel (see next picture), instead of the TAB thermo-
stat as described on the previous paragraphs about the progressive burners. Go on adjusting the burner as described before, paying
attention to use the CMF switch intead of
TAB .
The CMF position sets the oprating stages: to drive the burner to the high-flame stage, set CMF=1; to drive it to the low-flame stage, set
CMF=2. To move the adjusting cam set CMF=1 or 2 and then CMF=0.
CMF = 0 stop at the current position
CMF = 1 high flame operation
CMF = 2 low flame operation
CMF = 3 automatic operation
Keys
GV
gas valves group
ID1
air damper index
ID2
index
PA
air pressure switch
SC
actuator
SV
adjusting cam
V
adjusting screws
VF
butterfly valve
VRA
RA
TR
ID1
VF
PA
SC
SV
GV
ID2
V
SV
BF
F