Riello 576T1 Installation, Use And Maintenance Instructions page 37

4.3 SETTING OF THE AIR DAMPER ACTUATOR
PAUSE
I CAM
The I cam is factory set to allow the air damper to fully
close on shutdown. (Reference value 0°).
Do not modify this setting for any reason.
FIRST STAGE
V CAM
The V cam controls the air for the 1
The cam must be adjusted on decrease (damper closing)
by adjusting the micrometer screw.
The definitive position is obtained after 2
ment.
SECOND STAGE
II CAM
The II cam controls the air for the 2
(Reference value 60°, not to exceed 70°).
Do not modify this setting for any reason.
The regulation of airflow at 2
air damper (1, fig. 2).
The III cam controls the opening of the gas valve at 2
must precede the II cam by at least 15°.
Warning:
For power adjustment at 1
tions:
– the power ratio between 1
mum, if the above ratio is exceeded, valve seal control must be
used;
– in any case, the minimum burner power at 1
less than the firing rate range.
4.4 COMBUSTION CHECK
It is advisable to set the burner according to the type of gas used and following the indications of the table:
EN 676
Theoretical max. CO
GAS
0 % O
G 20 11.7
G 25 11.5
G 30 14.0
G 31 13.7
IONIZATION CURRENT
The minimum current necessary for the control
box operation is 3 µA.
The burner normally supplies a higher current
value, so that no check is needed. However, if
you want to measure the ionization current, you
must open the connector fitted to the red wire
and insert a microammeter.
2744
st
stage flame (2, fig. 2).
nd
stage adjust-
nd
stage flame.
nd
stage is carried out by operating the
st nd
and 2 stage, apply the following indica-
st nd
and 2 stage must be 1 : 2 at a maxi-
Setting CO
2
λ = 1.2
2
9.7
9.5
11.6
11.4
D1777
nd
stage and
st
stage must not be
AIR EXCESS:
max. output λ ≤ 1.2 – min. output λ ≤ 1.3
%
2
λ = 1.3
9.0
8.8
10.7
10.5
Terminal board
of control-box
10
7 GB
Micrometric screws
Fig. 2
E9085
CO
mg/kWh
≤
100
≤
100
≤
100
≤
100
Connector
D5006
2
1
NO
x
mg/kWh
≤
170
≤
170
≤
230
≤
230
Probe