Nortec MH Series - Manual (Page 16)

12 | MH Series
MHB Reflow - System Overview
Figure 7: System Overview – MHB Reflow
Functional Description
The water tub is filled up to a preset upper level via the level-controlled supply valve. When the
water level in the tub drops below a certain limit, the level-controlled supply valve opens until
the upper limit is reached again. The pump is activated whenever the float is high and
continues to operate for a preset time after the float level drops.
The MHB Reflow model provides on/off control by means of the MHB control unit and an
external on/off humidistat. In case of a humidification/cooling request the pump is activated.
The water flows via the manually adjustable volume controlling valves to the distribution pipes
above the humidification boxes.
The distribution pipes evenly supply the water to the entire surface of the humidification boxes
where it flows down and humidifies the air flowing through the humidification boxes. The
excess water not used for humidification flows to the water tub. To prevent accumulation of
mineral residues and the formation of germs in the water tub, the tub is completely drained
periodically (interval or time controlled).