Unigas HTP90A, Installation, User'S, And Maintenance Manual, Page: 36 / 60

C.I.B. UNIGAS - M039219CA
36
18 The low flame position must never match the ignition position that is why cam BF2 must be set 20°- 30° more than the ignition position.
19 Turn the burner off; then start it up again. If the adjustment is not correct, repeat the previous steps.
As far as fully-modulating burners, see paragraph on page 30.
Light oil circuit
The fuel is pushed into the pump 1 to the nozzle 3 at the delivery pressure set by the pressure governor. The solenoid valve 2 set the
fuel immission into the combustion chamber. The part of fuel that is not burnt goes back to the tank through the return circuit. The fuel
amount to be burnt is adjusted by means of the burner actuator according to the adjustments set (see prevoius paragraph).
Fig. 36 - Stand-by
Fig. 37 - Prepurge
Fig. 38 - Low flame
Fig. 39 - High flame
Key
1 Light oil pump
2 Light oil solenoid valve
3 Nozzle
4 Actuator
5 Adjusting cam
6 pressure gauge
7 Pressure regulator
8 One-way valve