CLIMAVENETA ACCURATE, User & Maintenance Manual

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18
English 01/07
ACCURATE AX* - AW*
HUMIDIFIER
A I U
SYSTEM COMPONENTS
Upon request, the air-conditioning unit can be fitted with an
immersed electrode humidifier (versions D and H).
1 Humidifier interface board:A3; (inside the electrical panel).
2 Current transformer TA1 (inside the electrical panel) for
measuring the current input of the steam cylinder.
3 Water fill tank.
4 High water level electrodes in the steam cylinder.
5 Overflow pipe (BEHIND THE CYLINDER).
6 Boiler cylinder (or steam cylinder).
7 Water fill solenoid valve:YV1.
8 Cylinder drain solenoid valve:YV2.
9 Microprocessor control board:A1.
10 Temperature and humidity probe: BH1.
3
4
6
7
8
9. B1
2. TA1
4
6.
8. YV2
7. YV1
5
3
1. A3
10. BH1
KM4
HUMIDIFIER OPERATING PRINCIPLE
In the immersed electrode humidifier, the current that runs
between the electrodes, through the water contained in the boil-
er cylinder, generates the heat required to boil the water.
By controlling the level of the water and the concentration of
salts inside the steam cylinder (6) using the fill (7) and drain (8)
solenoid valves, the amount of current delivered can be regulated,
and measured using a current transformer (2).
When steam production is required, the humidifier contactor CU
closes (see the wiring diagram) so as to supply power to the
immersed electrodes.
When the current falls below the set value due to the lowering
of the water level, the fill valve (7) is opened.
The drain valve (8) is activated cyclically, depending on the char-
acteristics of the supply water, so as to maintain the optimum salt
concentration inside the cylinder (6).
The only periodical maintenance operations required are the
inspection and cleaning of the parts in the steam production unit.
The operations indicated below should be performed annually,
preferably before shutting down the unit in summer.
STEAM CYLINDER
The steam cylinder requires periodical cleaning to remove the
scale deposits that form on the surface of the electrodes and the
flakes that deposit on the filter at the base of the cylinder.
To remove the cylinder, proceed as follows:
• completely drain the water from the boiler; to do this, see the
paragraph “MANUAL CONTROL” in the EVOLUZIONE con-
troller instruction manual;
• disconnect the power supply by opening the main switch on
the electrical panel;
• remove, from the top of the cylinder, the hose that carries the
steam to the distributor;
• disconnect the power connections by unscrewing the knobs
on the cable ends and remove the plugs from the level elec-
trodes;
• release the strap that secures the cylinder to the unit;
• slide the cylinder out upwards.
The steam cylinder can be reused a number of times after clean-
ing the electrodes: if, however, the wear on the grills of electrodes
is such that these cannot be regenerated, they must be replaced.
The only spare part is the complete cylinder body (with filter
included).