Unigas RG91 Manual page 31

Oil Flow Rate Settings
1 Once the air and gas flow rates are adjusted, turn the burner off, switch the CM switch to the heavy oil operation (OIL, on the bur-
ner control panel.
2 with the electrical panel open, prime the oil pump acting directly on the related CP contactor (see next picture): check the pump
motor rotation and keep pressing for some seconds until the oil circuit is charged;
3 bleed the air from the M pressure gauge port (Fig. 2) by loosing the cap without removing it, then release the contactor.
Suntec TA.
VR
4 As for setting the fuel/air ratio curve, see the LMV related manual.
5 the nozzle suplly pressureis already factory-set and must not be changed. Only if necessary, adjust the supply pressure as follows
(see related paragraph); insert a pressure gauge into the port shown on Fig. 3 and act on on the pump adjusting screw VR (see
Fig. 2) as to get the nozzle pressure at 20bar (Monarch or Fluidics nozzles).
Pressure gauge portPressure gauge port
6 Only if necessary, change the combusiton head position: to let the burner operate at a lower output, loose the VB screw and move
progressively back the combustion head towards the MIN position, by turning clockwise the VRT ring nut. Fasten VB screw when
the adjustment is accomplished.
Attention! if it is necessary to change the head position, repeat the air and gas adjustments described above.
Suntec T..
M
VR
Fig. 2
Fig. 3
VB
VRT
CP
M
VR
RP
31
PART II: INSTALLATION
HP-Technick UHE-A
PG
Fig. 4
"MIN" position
"MAX" position
M