57
AGUADENS
COSMOGAS
Figure 8.10 - Water sensors curve
8 - MAINTENANCE
8.10 - Procedure for draining
the water heater
To empty the appliance from the domestic hot water side,
proceed as follows:
1.- close the main cold water supply isolation valve;
2.- open all hot and cold water taps;
3.- make sure that at least one of these is at a height below
the level of the appliance.
8.11 - Fan test mode procedure
Switch-on of the fan only can be generated, accessing the
parameter
2010
situated inside the “Installer menu” (see
chapter 7.10) and set it on
FAn.
To go back to normal
operating conditions, set parameter
2010
again to
0FF.
8.12 - Gas burner minimum
and maximum performance
test mode procedure
Appliance operation can be forced to its own minimum,
maximum, adjusted or ignition power. Proceed as follows:
1.- access parameter
2010
found in the “installer menu”
(see chapter 7.10);
2.- set the parameter
2010
at the following value:
a)
LOu
to force the appliance to minimum power;
b)
Ign
to force the appliance to ignition power;
a)
HIgH
to force the appliance to maximum power;
a)
rEg
to force the appliance to maximum power.
4.- to end forcing, take the parameter
2010
to the
0FF
value and press the RESET key.
8.13 - Checking the ionisation current
In any operating status, also during verifications of minimum
and maximum power stated in paragraph 8.12, the ionisation
current value can be consulted on parameter
1008
present
in the “User menu” (table 7.9). This value must be between
1.5 and 3 uA (microampere) at minimum power and between
5 and 8 uA at maximum power.
8.14 - Water temperature measurement
sensor testing procedures
The temperature sensors are positioned on the appliances’
exchanger body. The electric resistance existing between
the two contacts of the sensor, must correspond with that
stated in figure 8.10.
The temperature sensors are:
1001
,
1002
,
1003
,
1005
,
1006
,
1007
and
1014
, the positioning of
which can be verified in figure 3.1.
