A
Ø
L
b
Blast tubes must not exceed the specified lengths by more than 20%.
a
Do not re-use old burners if their blast tube lengths are below those specified in the table.
If you are installing a new boiler but re-using an old
burner, always perform the following checks:
- Make sure that the performance of the old burner is
adequate for the requirements of the boiler
- Make sure that the length and diameter of the burner’s
blast tube are as specified in the following table
b
When you finish installing the burner in the boiler,
fill the gap between the burner’s blast tube and
the refractory material in the door with the ceramic
insulation (A) supplied with the boiler.
DIMENSIONS (mm)
RTQ 3S
2700
3000
3500
4000
Burner head - L min. (mm)
350
350
405
405
Hole in door - Ø (mm)
350
350
440
440
DIMENSIONS (mm)
RTQ 3S
2700
3000
3500
4000
Ø
300
300
350
350
A
260
260
310
310
Threads
M18
M18
M20
M20
45°
45°
A
A
Ø
BURNER PLATE
RTQ 3S
r
boilers have burner plates with holes
arranged to accept the recommended burners. The
following table shows the dimensions of the holes.
L < S
S
L
IMPORTANT NOTES FOR BURNER
INSTALLATION
Before fixing the burner to the boiler, make sure that:
- The door opens the right way (see the relevant sections
for details on how to reverse the door).
- The length (L) of the burner fixing bolts is less than
(S), i.e. the total depth of the seal, plates and washer.
Longer bolts can cause the door to warp, compro-
mising its ability to seal the boiler hermetically and
permitting the release of combustion fumes.
To ensure correct burner installation, also refer to the
burner’s own manual.
10
GENERAL
