Riello 40 Installation, Use And Maintenance Instructions page 36

3.4.2 ELECTRICAL WIRING WITH GAS LEAK CONTROL DEVICE (DUNGS VPS 504)
nd
Connect 2 stage thermostat between clamps T6 and T8 removing
the bridge.
4. WORKING
4.1 COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC the application of
the burner on the boiler, adjustment and testing must be carried out
observing the instruction manual of the boiler, including verification
of the CO and CO concentration in the flue gases, their tempera-
2
tures and the average temperature of the water in the boiler.
To suit the required appliance output, choose the proper setting of
the combustion head, and the air damper opening.
4.2 COMBUSTION HEAD SETTING
Loose the screw (A), move the elbow (B) so that the rear plate of
the coupling (C) coincides with the set point.
Tighten the screw (A).
Example:
The burner is installed on a 155 kW
boiler with an efficiency of 90%, the
burner input is about 172 kW using the
diagram, the combustion set point is 3.
The diagram is to be used only for initial
settings, to improve air pressure switch
operation or improve combustion, it
may be necessary to reduce this setting
(set point toward position 0).
20033980
~
230V 50Hz
D4148
kcal/h kW
240
200,000
220
180,000
200
160,000
180
172
140,000
160
140
120,000
120
100,000
100
80,000
70,000
80
0
6 GB
KEY TO LAY-OUT
X4 – 4 pin plug
X6 – 6 pin plug
X7 – 7 pin plug
st
B4 – 1 stage working signal
nd
B5 – 2 stage working signal
st
h1 – 1 stage hour counter
nd
h2 – 2 stage hour counter
PG – Min. gas pressure switch
S3 – Remote lock-out signal
(230V - 0.5 A max.)
T6A – Fuse
TL – Limit thermostat
nd
TR – 2 stage thermostat
TS – Safety thermostat
V10 – Safety valve
st
V11 – 1 stage valve
nd
V12 – 2 stage valve
C
A
B
D5109
1 2 3
TO BE DONE BY
THE INSTALLER
S7015
4 5
Set point