54
60T - 280T
COSMOGAS
15 - COMMISSIONING
15.8.2 - Checking the CO2 seal and any
adjustments on appliance models from
100T up to 280T
ATTENTION!!! If, during this procedure, a CO
value greater than 1000 ppm is detected, stop the
appliance and contact the manufacturer.
1. - If there isn’t one already, a hole must be made for
combustion analysis positioned about 200 mm from the
flue exhaust fitting (see figure 15-9 near the plug, part “F”).
2.- Put the appliance in stand-by, shutting down all heating
demands (remove the room thermostat bridge, if any, or
adjust the heating service to off using the
key).
3.- Make sure that the required temperature is higher than the
boiler/water heater temperature;
4.- Access the installer menu (see section 16.15) and set
parameter
2201
to
HIGH.
The MASTER burner will now
work for 20 minutes at maximum output heat;
5.- Wait two or three minutes for the CO2 to stabilise;
6.- Put the CO2 value reading probe into socket “F” shown in
figure 15-9;
7.- Compare the CO2 value detected with the one shown in
table 15-8. Be sure to read the value for the type of gas being
used. If the CO2 value does not match the one in table 15-8,
it must be adjusted via screw “E” in figure 15-10. Use a 2,5
mm hex spanner (turn the screw clockwise to reduce the CO2
value and anticlockwise to increase it). Make small turns,
always waiting for the value to stabilise before continuing,
until you reach the desired value.
8.- Once the correct CO2 value as per table 15-8 has been
reached, seal the screw with red paint or a similar system
to discourage tampering.
9.- Set parameter
2201
to
LOu
. The MASTER burner will
now work for 20 minutes at minimum output heat;
10.- Wait two or three minutes for the CO2 to stabilise;
11.- Compare the CO2 value read with the one in table 15-8.
Be sure to read the value for the type of gas being used. The
CO2 value must be within the values shown; if not, stop the
appliance and call the manufacturer.
ATTENZION!!! The C02 reading, at low fire,
could be affected by the natural draught of the
chimney (negative pressure inside the chimney). If
this is the case, take the CO2 reading removing the
correspondent flue gas sensor.
12.- Set parameter
2201
to
OFF
.
13.- Repeat the operations from point “3” to point “11” on the
remaining burners, considering that parameter
2202
corresponds to burner 2,
2203
to burner 3 and
2204
to burner 4.
14.- Close the combustion analysis hole in figure 15-9 with
appropriate plug “F” as per the instructions from the drain
pipe manufacturer.
ATTENTION!!! Once plug “H” is positioned with
the appliance at maximum output heat, make sure there
are no flue exhaust leaks, which could cause damage.
15.9 - Checking appliance output heat
The appliance has a factory set air/gas mixture ratio. The gas
pressure to the burner is indirectly controlled by the fan. The
only way to check the appliance output heat is to directly use
the gas counter. Proceed as follows:
1. Switch the appliance on by turning the main switch to ON
(part “T” in figure 16-1)
and send a heating demand, bring
the requested temperature to the maximum value via the
key, making sure that the system is able to dissipate
all the heat generated.
2. For the 60T and 70T models, set parameter
2010
to
HIGH
. For the other models, set parameter
2200
to
HIGH
. The appliance will now work for 20 minutes at
maximum output heat.
3. Measure the gas flow rate to the counter. The value obtained
must be compared with the value given in section 18 under
“Gas flow rate” with a tolerance of + or - 10%.
4. If the flow rate is lower, make sure:
a) That there are no obstructions in the air intake and flue
exhaust ducts;
b) That the lengths of the air intake and flue exhaust ducts
correspond to what is described in section 18;
c) That the air intake filter (part “11” in figures 3-3, 3-5 and
3-7) is clean;
5. If the gas flow rate is within the tolerance, set parameter
2200
to
OFF
. In 60T and 70T model appliances, set
parameter
2010
to
OFF
to bring the appliance back to
normal operation.
6. If the gas flow rate is greater, repeat the procedure in section
15.9.
15.10 - Minimum water flow rate
The appliance has a protection system against low water flow
rate. The water flow rate measuring device (part “16” in figure
3-1) continuously measures the flow rate on each exchanger.
If the flow rate drops below the “Minimum operating water flow
rate” referred to in section 18, the appliance automatically
switches off and, if the flow rate does not increase after three
minutes, the corresponding error appears on the display.