Installation; Boiler Plate; Blast Tube Length; Securing The Burner To The Boiler - Riello GAS 9/2 Installation, Use And Maintenance Instructions

mm A B C
GAS 9/2 300 260 260
(A)
(B)
PROBE
(C)
D
M18
D46
ELECTRODE

INSTALLATION

BOILER PLATE (A)
Drill the combustion chamber locking plate as
shown in (A). The position of the threaded holes
can be marked using the thermal screen sup-
plied with the burner
BLAST TUBE LENGTH (B)
The length of the blast tube should be selected in
relation to indications provided by the boiler
manufacturer and, in any case, should be great-
er than the thickness of the boiler door complete
with refractory material.
Three different blast tube lengths are available:
Blast tube L mm
Shortened
Standard
Lengthened
For boilers with front flue passes as shown in 15)
or a flame inversion chamber, the space be-
tween the front plate quarl 17) and the burner
blast tube, must be properly sealed with appro-
priate refractory material 16).
Afterwards, it must still be possible to pull out the
blast tube.
SECURING THE BURNER TO THE BOILER (B)
- Detach the combustion head, as follows:
• remove screws 5)(B) from the two slide bars 6);
• detach head drive rod 11) by removing pin 2);
• remove screws 7), which secure the fan
D3514
housing to the combustion head;
• withdraw the burner by about 100-120 mm;
• detach drive fork 8) by removing screws 12);
• at this stage, slide the burner fully out from
slide bars 6);
- Before securing the combustion head to the
boiler, make sure the probe and the electrode
are correctly positioned, as shown in (C).
If positioning is incorrect, disassemble elbow
10) from sleeve 13).
CAUTION
- Secure the blast tube to the boiler plate,
installing the burner heat shield 14) supplied
as standard equipment. To do this, use the
four standard-issue screws, having first pro-
D101
tected the threads with an anti-grip product.
The burner-boiler installation must be hermet-
ically sealed.
- Adjust the combustion head as described
below.
- Mount the fan housing on to slide bars 6).
- Leave the burner open by about 100-120 mm.
- Refit fork 8) securing it with screws 12).
- Close the burner.
- Tighten screws 7) which secure the fan hous-
ing to the combustion head.
- Fit stops to slide bars 6) with screws 5).
WARNING
WARNING
8
9/2
314
444
574
Do not rotate the probe but
leave it in position as shown
in (C); positioning the probe
near the firing electrode
could damage the control
box amplifier.
When fitting the burner on the
two slide bars, it is advisable to
gently draw out the high tension
cable and flame detection
probe cable until they are
slightly stretched.
"
Refer to paragraph Safety
testwith gas ball valve
"
closed on page 18 before
the first start up.