Boiler Fixing; Burner Assembly - Riello 484LD2X Installation, Use And Maintenance Instructions

5.6

Boiler fixing

Prepare a suitable lifting system.
 Align burner combustion head 1)(Fig. 7) interposing the
insulating gasket 2), into the boiler housing tube 3)(Fig. 6).
 Push firmly down to compress the gasket 2).
 Tighten the two screw 4) sufficiently to ensure a good seal.
 Make sure any electrical cable and flexible oil line are routed
away from hot surfaces.
The seal between burner and boiler must be air-
tight.
WARNING
3
4
5.7

Burner assembly

The temperature of the incoming air must not
exceed 70 °C.
CAUTION
The combustion air supply is through a flexible or rigid pipe con-
nected to the air intake.
Consequently, you must comply with the following requirements
and instructions:
 The combustion air intake tube must be:
- fastened securely to the burner;
- made of a suitable material, with temperature characteris-
tics in the range - 30 °C to 80 °C;
- in compliance with all requirements of applicable regula-
tions in force in the country of destination.
 The intake-tube / burner system must not allow a loss of
3
over 2 m /h at 0.5 mbar:
for instance, the above requirements will be met if you use flues
for pressure exhaust of flue gases (the condensation kind).
 Make sure the air intake tube's inlet is positioned so that it is
not likely to be obstructed by foreign matter and, where nec-
essary, use suitable screens.
 The inside diameter of the hose must be at least 80 mm.
 The intake tube can be up to 6 metres in length.
Length is reduced if there are bends in the intake
section.
For instance, using a tube with a smooth inside
WARNING
surface, you must allow for the following losses:
– for each 45° bend, tube length is reduced by
0.5 m;
– for each 90° bend, tube length is reduced by
0.8 m.
2903266
Installation
Fig. 6
D7419
NOTE:
Burner installation must in any case comply with the flue
systems included within the boiler approved configuration.
12 GB
D7383
1
2
 Under no circumstances should the air's
entry in the hose intake area be obstructed.
 The hose must not be blocked in any way or
feature a shutting device (valves, membranes
WARNING
etc.).
1
D7418
Fig. 7
Fig. 8