Nozzle Placement; Installation/Removal Of Drawer Assembly; Electrode Setting; Turbulator Setting - Riello F20 Installation, Use And Maintenance Instructions

NOZZLE PLACEMENT

A) Determine the proper firing rate for the boiler or furnace
units, considering the specific application, and then use the
Burner Setup Charts to select the proper nozzle and pump
pressure to obtain the required input from the burner.
B) Remove the NOZZLE ADAPTER (2) from the DRAWER
ASSEMBLY by loosening the SCREW (1).
C) Insert the proper NOZZLE into the NOZZLE ADAPTER and
tighten securely (Do not over tighten).
D) Replace adapter, with nozzle installed, into drawer assem-
bly and secure with screw (1).
INSTALLATION/REMOVAL
OF DRAWER ASSEMBLY
A) To remove drawer assembly,
loosen SCREW (3), then unplug
CONTROL BOX (1) by carefully
pulling it back and then up.
B) Remove the AIR TUBE COVER
PLATE (5) by loosening the two
retaining SCREWS (4).
C) Loosen SCREW (2), then slide
the complete drawer assembly
out of the combustion head as
shown.
D) To insert drawer
reverse the procedure in items A
to C above, then attach fuel line
to the pump.

ELECTRODE SETTING

IMPORTANT:
These dimensions must be observed and verified.

TURBULATOR SETTING

A) Loosen NUT (1), then turn SCREW (2) until the INDEX MARK-
ER (3) is aligned with the correct index number as per the
Burner Set-up chart.
B) Retighten the RETAINING NUT (1).
NOTE:
Zero and five are scale indicators only. From left to right, the first
line is 5 and the last line 0.
2902453
assembly,
S7438
5 / 32" or 4 mm
D6003
1 / 4" to 9 / 32" or 6 to 7 mm
6
GB
S7437
D5997
3
2
1