Unigas HTP90A, Installation, User'S, And Maintenance Manual

Page: 32 / 60

C.I.B. UNIGAS - M039219CA
32
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. 29-Fig. 30 (as far as reading the pres-
sure values, see next paragraphs).
Fig. 29
Example (Bergonzo): if a 220kg/h flow rate BERGONZO nozzle is provided, set the return pressure at 11bar, supply at 20bar on the
delivery to get a 220kg/h flow rate. If the return pressure needed is 5bar, instead, act on the V adjusting screw on the pressure gover-
nor (see chapter on page 32). The flow rate will then be about 95kg/h (see the example showed on the Bergonzo diagram-Fig. 29).
NOZZLE
DELIVERY
PRESSURE
bar
RETURN
PRESSURE MAX.
bar
RETURN
PRESSURE MIN.
bar
BERGONZO A3 20 11 ÷ 13 6 (recommended)
FLUIDICS WR2 25
20
7 (recommended)