Gas Feeding Line; Probe-Electrode Positioning - Riello BS2/M TL Manuel D'entretien

ATTENTION
The tube connecting valve tap P F with boiler tap A must be positioned so that any condensate is drained into

the combustion chamber and not inside the valve.
The run for the pulse lines must be short.

It is necessary for the pulse lines not to touch the boiler since the high temperature would damage them.

In certain applications, where pressure measurement in the combustion chamber is inaccurate, it is neces-

sary to move the G1/8 connector from the burner flange to the boiler door. In this case, blank the flange hole.
Failure to do so may cause the valve to malfunction, and to be damaged.

3.3

GAS FEEDING LINE

1
Fig. 7
Gas supply pipe
1 –
Manual cock
2 –
(charged to the installer)
Gas pressure gauge
3 –
(charged to the installer)
4 – Filter
Gas pressure switch
5 –
Electromagnetic safety valve
6 –
Electromagnetic operating valve
7 –
Pressure governor
8 –
– Pressure in
P
F
chamber
3.4 PROBE - ELECTRODE POSITIONING
ATTENTION
Verify that the plate (3, fig. 8) is always inserted in the

flattening of the electrode (1).
Lean the probe insulator (4) against the cup (2).

TYPE A
30
916M
917M 31
918M 31
3134
2 M1 4
Air pressure at combustion head
P –
L
Gas-supply pressure test point
M1 –
Pressure point for gas measurement at
M2 –
gas train outlet
Pressure point for gas pressure meas-
M3 –
urement at combustion head
combustion
5 6 7
3.5
±
0.3
3
D6088
7
GB
M2
M3
P
F
P
L
Fig. 8
A
±
0.3
1
4
D4430
2