75
60T - 280T
COSMOGAS
17.10 - Emptying the appliance
1.- generate a heating demand by increasing the domestic
hot water and heating temperature (also close any room
thermostat bridges in the boiler version);
2.- wait for the burner to ignite (in the multi-burner versions,
wait for all the burners to ignite) (make sure as many
corresponding “L” icons in figure 16-1 as burners are on);
3.- switch off the appliance. This way, any motorised valves
stay open);
4.- close the system loading cock provided for by the
installer;
5.- connect a flexible rubber hose to the drain cocks “38” in
figures 3-3, 3-5 and 3-7, and direct it to the drain in a sink
or the like;
6.- wait for the water inside the appliance to cool to below
about 40°C;
7.- open the drain cocks slowly;
8.- open the heating element bleed valves. Start from the
higher heating elements and continue with the lower
ones.
9.- once all the water has been drained, close the bleed
valves on the heating elements and the drain cocks
provided for by the installer.
ATTENTION!!! Recovering and/or reusing the
water leaving the heating circuit for any purpose is
prohibited, as it could be polluted.
17.11 - Minimum and
maximum output heat
It is possible to force operation to your own minimum,
maximum or ignition output heat. Proceed as follows:
1.- make sure the heat generated by the appliance can be
dissipated by the system;
ATTENTION!!! During forcing, the supply
temperature automatically goes to 93°C to allow the
heat generated by the appliance to be assimilated as
much as possible. Make sure the system can withstand
this temperature.
2.- access parameter
2010
(
2200
for multi-burner
models) located in the “installer menu” (see section 16.15);
3.- set the parameter to the following value:
a)
LOu
to force the burner, or all the burners, to minimum
output heat;
b)
Ign
to force the burner, or all the burners, to ignition
output heat;
a)
HIgH
to force the burner, or all the burners, to
maximum output heat;
4.- To end forcing, bring parameter
2010
(
2200
for multi-
burner models) back to
0FF
and press the RESET key.
ATTENTION!!! If, during forcing, the output heat
dispensed by the appliance is much greater than the
output heat absorbed by the system, the appliance
switches off continuously to reach the maximum
allowed temperature (93°C).
The same procedure above can also be applied to 100T to
280T model multi-burner appliances but consider that only
one burner can be forced at a time, moving the display from
one burner to another, as described in section 17.8.
17.12 - Checking the ionisation current
At any operating state, even during maximum and minimum
output heat checks as per section 17.11, it is possible to see
the ionisation current value on parameter
1008
in the “user
menu” (section 16.14). This value must be between 4 and 7
uA (microamperes).
Being that parameter
1008
on multi-burner appliances
(models from 100T to 280T) corresponds to Burner 1 (Master),
in order to check the other burners, you must refer to section
17.8.
17.13 - Checking combustion
performance
Based on national laws on gas appliances, combustion
performance must be checked periodically;
To this end, do exactly what is described in section
15.8 and, along with the output heat, check combustion
performance, which must be greater than 96%.
17 - MAINTENANCE