Unigas TP90A-TP91A, Руководство по установке, использованию и обслуживанию, Страница: 30 / 64

PART I: INSTALLATION MANUAL
30
rods.
11 the air and gas rate are now adjusted at the maximum power stage, go on with the point to point adjustement on the SV adjusting
cam as to reach the minimum output point.
12 as for the point-to-point regulation, move the gas low flame microswitch (cam III) a little lower than the maximum position (90°);
13 Set the
TAB thermostat to the minimum in order that the actuator moves progressively towards the low flame position;
14 move cam III to the minimum to move the actuator towards the low flame until the two bearings find the adjusting screw that refers
to the lower position: screw V to increase the rate, unscrew to decrease.
15 Move again cam III 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.
16 If it is necessary to change the burner output in the low flame stage, move cam III: the low flame position must never match the
ignition position, that is why cam III must be set 20°-30° more than cam II.
17 Now adjust the pressure switches (see next par.).
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 indexgas
valves group
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