Unigas RG91, Manual

Page: 20 / 108

PART II: INSTALLATION
20
ADJUSTING AIR AND LIGHT OIL FLOW RATE
Light oil nozzles
The oil flow rate can be adjusted choosing a nozzle that suits the boiler/utilisation output and setting the delivery and return pressure
values according to the ones quoted on the following charts.
NOZZLE
NOZZLE SUPPLY
PRESSURE (bar)
HIGH FLAME
RETURN PRESSURE (bar)
LOW FLAME
RETURN PRESSURE (bar)
BERGONZO A3 20 11 - 13 5 (recommended))
FLUIDICS WR2/UNIGAS M3 25 See table below 7 (recommended)
FLUIDICS NOZZLE: REFERENCE DIAGRAM (INDICATIVE ONLY)
Tab. 1
NOZZLE SUPPLY PRESSURE = 25 bar
ATTENTION! To achieve the maximum flow rate close completely the return line.
DI
M
E
N
S
IO
NS
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)
Supply 25 bar
- - - - -
Atomisation angle according to the return pressure
̶̶̶̶ ̶̶̶̶ ̶̶̶̶ ̶̶̶̶ ̶̶̶̶ ̶̶̶̶̶
% Flow rate
viscosity at nozzle = 5 cSt