38
AGUADENS
COSMOGAS
Figure 6.9 - Combustion agent air pressure point
Figure 6.11 - Controlling combustion air pressure
6.7 - Measurement of
combustion air pressure
As the appliance has an air/gas ratio fixed in the factory, the
gas pressure at the burner is controlled indirectly by measuring
the pressure of the combustion air inside the appliance and
must correspond to that stated in the table in chapter 9, under
“Combustion agent air pressure”.
Proceed as follows for the check (refer to the Figures from
6.9 to 6.12):
1.- use a differential manometer with precision of at least 0.1
mbar (1 mmH2O);
2.- close the gas isolation valve;
3.- open the appliance casing following paragraph 8.2;
4.- remove the caps “A” (see figure 6.9);
5.- take the flexible hose “D”, which is found inside the
appliance and remove the cap “B” (see figure 6.9);
6.- insert the pipe “D” inside the hole indicated by the arrow
in figure 6.9;
7.- loosen the pressure point “H” in figure 6.10;
8.- take a silicone pipe with external diameter of 10 mm and
internal diameter of 7mm (detail “E” in figure 6.10) and
introduce it into pressure point “H”;
9.- insert pipe “E” into the hose as indicated in figure 6.11;
10.- connect the manometer to the two pipes “E” and “F” as
illustrated in figure 6.12, making sure to connect the pipe “E”
to the negative pressure point and tube “F” to the positive
pressure point;
11.-
close the casing “B” in figure 8.1. It is indispensable
to have a reliable measurement;
12.- switch the appliance on;
13.- press the
and RESET keys simultaneously for
more than 5 seconds to enter the “installer” menu
confirmed by the icon
appearing on the display.
14.- using the
and
keys, access the
parameter
2010
;
15.- press the RESET key to enter the parameter and use the
and
keys, to modify the value to
FAn
;
16.- press the RESET key to confirm the modification. Now
just the fan will operate at maximum speed for 10 minutes.
17.- compare the pressure value read on the manometer with
that given in the table in table 9, “Combustion air pressure”.
If the pressure is at a lower value, check that there are no
obstructions in the combustion air/exhaust flue pipes or
that the combustion air/exhaust system does not exceed
the parameters as detailed in table 9 entitled combustion
air/exhaust pipe max. length for the relevant type;
18.- Once the control has ended, press the RESET key
again to enter parameter
2010
and via the
and
keys, change the value to
OFF
;
19.- press the RESET key to confirm the modification;
20.- hold the RESET key down for 5 seconds to exit the
“installer” menu.
At the end of the control, remove the tube “E”, close the
holes indicated by the arrow using the previously-removed
caps “A”, close the pipe “D” using cap “B” and close the
pressure point “H” again as in figures 6.9 and 6.10.
6 - OPERATING
D
A
C
B
020002.01.019
D
C
E
F
020002.01.020
Figure 6.10 - Combustion agent air pressure point
H
E
020002.01.022