C.I.B. UNIGAS
- M03993CH
26
Oil thermostat adjustment
All thermostats are located inside the control panel. To set the temperature use a small screwdriver. Such temperature must be set
during burner operation, checking temperature in the thermometer mounted on the pre-heating tank. We suggest a thermometer with
scale up to 200° C.
Adjusting the pilot gas flow rate: gas valve Brahma EG12xR and pressure governor
To change the pilot gas valve flow rate, proceed as follows:
1
remove the protection on the bottom of the valve, moving it counterclockwise (see next picture);
2
rotate clockwise the nut 1 as shown in to close the valve or counterclockwise to open.
To perform a finest adjustment, act directly on the pressure governor as follows (see next picture):
3
remove the cap
T
: to increase the gas pressure at the outlet use a screwdriver on the screw
TR
as shown in the next picture. Screw
to increase the pressure, unscrew to decrease; once the regulation is performed, replace cap
T
.
Adjustments - brief description
z
Adjust the air and oil flow rates at the maximum output (“high flame”) first, by means of the air damper and the adjusting cam res-
pectively.
z
Check that the combustion parameters are in the suggested limits.
z
Then, adjust the combustion values corresponding to the points between maximum and minimum: set the shape of the adjusting
cam foil. The adjusting cam sets the air/fuel ratio in those points, regulating the opening-closing of the fuel governor.
z
Now set the low flame output, acting on the low flame microswitch of the actuator in order to avoid the low flame output increasing
too much or the flues temperature getting too low to cause condensation in the chimney.
Now, adjust the burner according to the actuator model provided.
Safety resistors thermostat TRS:
it is factory preset
and sealed. Do not change it!
When the set temperature is exceeded, check the rea-
son why and reset it by means of the push button PR.
Resistor thermostat TR:
check the best atomising oil
temperature on paragraph on page 13 and set it on TR.
Thermostat TCI
(it gives the enabling signal to the oil
N.C. valve): set TCI at about 20° less than TR.
Fig. 18
Set pilot gas pressure switch at 50 mbar.
Fig. 19
PR
1
T
TR
Brahma gas valve EGRx12
Pressure governor with filter
