Unigas RN510, Installation, Use & Maintenance Manual, Page: 20 / 138

20
Adjusting light oil flow rate
The light oil flow rate can be adjusted choosing a by-pass nozzle that suits the boiler/utilisation output and setting the delivery and
return pressure values according to the ones quoted on the chart below and the diagram on Fig. 15 (as far as reading the pressure
values, see next paragraphs).
Oil thermostat adjustment
Progressive and fully modulanting oil burners are equipped with electronic multi-thermostat Danfoss MCX, whose operation is con-
NOZZLE
DELIVERY
PRESSURE
bar
RETURN
PRESSURE MIN.
bar
FLUIDICS WR2/UNIGAS M3 25 7 - 9 (indicative values)
FLUIDICS NOZZLE: REFERENCE DIAGRAM (INDICATIVE ONLY)
Tab. 2
NOZZLE SUPPLY PRESSURE = 25 bar
ATTENTION! To achieve the maximum flow rate close completely the return line.
DIMENSIONS
FLOW RATE kg/h Indicative
pessure on
return (bar)
Min Max
40 13 40 19
50 16 50 22
60 20 60 20
70 23 70 23
80 26 80 23
90 30 90 22
100 33 100 22
115 38 115 21
130 43 130 22
145 48 145 21
160 53 160 21
180 59 180 22
200 66 200 21
225 74 225 22
250 82 250 22
275 91 275 22
300 99 300 23
330 109 330 23
360 119 360 22
400 132 400 22
450 148 450 22
500 165 500 22
550 181 550 22
600 198 600 23
650 214 650 23
700 231 700 23
750 250 750 23
800 267 800 22
850 284 850 22
Pressure on return (psi)
Up to 100kg/h
Over 100kg/h
Flow rate
Atomisation angle
Pressure on return (bar)
- - - - -
Atomisation angle according to the return pressure
̶̶̶̶ ̶̶̶̶ ̶̶̶̶ ̶̶̶̶ ̶̶̶̶ ̶̶̶̶̶
% Flow rate
viscosity at nozzle = 5 cSt