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Only for RLS 400/EV FGR model
To achieve operation at minimum output, the com-
bustion head's gas pipes must be adjusted to hole
position 5 (Fig. 21).
WARNING
D3418
4.9.1
Adjustment at the maximum output (for gas)
Only for RLS 650/EV FGR model
The adjustment at the maximum output requires the disassembly
of the 6 nozzles as indicated in Fig. 22.
Proceed as follows:
➤ disassemble from the burner of the complete combustion
head assembly;
D10479
4.10
FGR duct system
–
Normally the duct would connect to the stack as shown in
Fig. 23, with a 45° cut facing the flue gas flow and with the
center of the cut centered in the stack.
The duct could be made to the smoke box, but must still be lo-
cated with the same 45° cut facing the flue gas flow stream and
with the center of the cut in the center of the stream.
–
The duct should be routed in a manner that has the minimum
number of elbows and provides for the normal expansion and
20037168
Installation
➤ unscrew the screws and remove the 8 tangential tubes 1);
➤ unscrew the 4 screws and disassemble the diffuser disc 2);
➤ unscrew and remove the 6 nozzles 3);
Re-assemble with reverse procedure, re-placing all the burner
components as originally.
3
2
contraction of the piping.
Long duct runs can change length by over 1" and can put an
extreme load on the connecting points that could cause com-
ponent failures.
The design must include offsets that will allow for the required
movement of the piping without undue force on the burner or
stack.
28
GB
Fig. 21
1
Fig. 22
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