COSMOGAS AGUADENS Series, Installation, Operating And Maintenance Manual

Page: 42 / 72

42 AGUADENS
COSMOGAS
6 - OPERATING
6.7 - Measurement and
adjustment of CO2 levels
The appliance in normal operating condition and for altitudes within
1000 m, must have a CO2 (carbon dioxide) level in the exhaust flue
gases within the parameters as detailed in section 9. A value which
is different to those detailed can cause malfunctions and is strictly
prohibited. Combustion analysis must be performed to check and
eventually adjust this value. Proceed as follows:
1.- insert a combustion analyser on the appropriate point on
the flue fitting “B” in figure 6-10 or 6-11;
2.- open the domestic hot water tap fully;
3.- wait for the CO2 measurement to stabilise;
4.- compare the value measured with that given in the
table in figure 6-8, “CO2 maximum power”. If the value
measured is different from the value read, it must be
taken back within the value given in the table in figure
6-8. proceeding as follows:
a) turn screw “A” (figure 6-12) clockwise to decrease the
level of CO2;
b) turn screw “A” (figure 6-12) counter-clockwise to increase
the level of CO2;
5.- once the check has been completed, seal the screw “A” in
figure 6-12 with red paint or similar system;
6.- follow section 7.8 to enter parameter 2010 and set it to
Lou;
7.- open a DHW faucet to draw some water;
8.- now appliance will fire at minimum capacity;
9.- wait for the CO2 measurement to stabilise;
10.- compare the value measured with that given in the
table in figure 6-8, “CO2 minimum power”;
11.- if the value is not into the range, use screw “B” as per
figure to adjust the CO2 value. Rotate the screw counter-
clockwise to reduce the CO2 value or clockwise to
increase the CO2 value;
12.- once the check has been completed, seal the screw “B”
in figure 6-12 with red paint or similar system;
13.- press the RESET key again to enter the parameter
2010
and use the and keys, to modify
the value to
OFF
;
14.- press the RESET key to confirm the modification.
15.- hold the RESET key down for 5 seconds to exit the
“installer” menu.
16.- close the previously-opened domestic hot water tap.
Figure 6-10 - Combustion analysis port on models
16 and 22
B
A
C
D
E
020002.01.015
Figure 6-12 - Gas valve
A - High fire CO2 adjustment screw
B - Low fire CO2 adjustment screw
A
B
A
B
020002.01.045
Figure 6-11 - Combustion analysis port on model
37
B
D
B
D
020008.01.023