Nortec ME Control - Manual (Page 17)

17 Product Overview
Functional description
The water tank is filled up to a preset upper level via the level-controlled inlet solenoid valve (NC). When
the water level in the water tank drops below a certain limit, the level-controlled inlet solenoid valve opens
until the upper limit is reached again.
The Nortec ME Control provides On/Off or stage control by means of the Nortec ME Control control unit
and the stage pumps. The Nortec ME Control control unit processes analog sensor/control signals and
uses them to control the stage pumps.
In case of a humidification/cooling request with
activated On/Off control the inlet solenoid valve (NC)
opens and all stage pumps start and the water flows to the distribution header above the evaporative
cassettes.
In case of a humidification/cooling request with
activated stage control the inlet solenoid valve (NC)
opens, then one, two, three, four or all five stage pumps start (depending on the demand signal and
evaporative module size) and the water flows to the distribution header above the evaporative cassettes.
The distribution pipes inside the distribution header evenly supply the water to the entire surface of the
evaporative cassettes where it flows down and humidifies the air flowing through the evaporative cas-
settes. The excess water not used for humidification flows to the water tank.
To prevent accumulation of mineral residues and the formation of germs in the water tank, the tank is
completely drained periodically (interval or time controlled). Additionally further hygiene functions can
be activated: Operation-dependent draining of the water tank (fill cycle, conductivity, temperature or
time controlled).