Pump Pressure And Air Output; Pump-Adjustment - Riello BG5 Instrucciones De Instalación, Uso Y Mantenimiento

4.3

PUMP PRESSURE AND AIR OUTPUT

The burner, in order to guarantee good smooth starts, ir-
respective of the type of boiler, is fitted with a hydraulic
device which, independently of the control-box, reduces
the fuel- and air-flow.
At ignition, the pressure at the nozzle is 12 bar. After 3 -
9 seconds, it automatically increases to 14 bar.
The air-flow, initially adjusted to the low setting, is, at the
change-over of pressure, automatically brought to the
air-flow required for the big flame.
SETTING FOR THE LOW-FLAME (See fig. 15)
ADJUSTMENT OF AIR SHUTTER
Unloosen the screw (8), by approximately one full turn; in
this way, the burner remains permanently on low flame.
Unloosen the nut (5), turn the screw (4) until the indicator
(6) reaches the position desired.
Then lock the nut (5) and tighten the screw (8).
ADJUSTMENT START DELAYING DEVICE:
This is set at 12 bar at the factory.
It is advisable not to reduce this value. The pressure gauge must be mounted in place of plug (4, fig. 9, page
6). Should it be necessary to re-set or alter such pressure, this can be done, by adjusting screw (7), always after
having loosened screw (8).
SETTING FOR THE HIGH-FLAME (See fig. 15)
ADJUSTMENT OF AIR SHUTTER
Loosen the nut (3), turn the screw (1), until the indicator (2) is in the required position. Then, lock the nut (3).

PUMP-ADJUSTMENT:

This is set at 14 bar at the factory. The pressure gauge must be mounted in place of plug (4, fig. 9, page 6).
Should it be necessary to re-set or alter such pressure, this can be done, by adjusting screw (5, fig. 9, page 6).
When burner shuts down the air damper automatically closes till a max. chimney depressure of 0.5 mbar.
ATTENTION:
The values of the set-points stated in the table are only indicative.
Carry out the setting with CO 2 not lower than 13%.
3402
Fig. 15
S7160
9 GB