FläktGroup Row-DENCO DRC 020, Руководство по эксплуатации, Страница: 67 / 92

Row -DENCO Commissioning and Testing
FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications 67
10.14 Humidifier
10.14.1 System components
Upon request, the air-conditioning unit can be fitted with an immersed electrode humi-
difier.
Fig. 10-19: Components
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.
10.14.2 Humidifier operating principle
In the immersed electrode humidifier, the current that runs between the electrodes,
through the water contained in the boiler 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 deli-
vered 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 characteristics of the sup-
ply 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.
3
4
6
7
8
9. B1
2.TA1
4
6.
8.YV2
7.YV1
5
3
1. A3
10.BH1
KM4