Nortec MH Series - Manual (Page 18)

14 | MH Series
MHTC Reflow System Overview
Figure 9: System Overview – MHTC 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 MHTC Reflow model provides multistep control by means of the MHTC total control unit
and the step valves (1, 2 or 3 step valves depending on the humidifier capacity). The MHTC
total control unit (for wall mounting) processes analog sensor/control signals and uses them
to control the step valves. This allows multistep control (1 to 3 steps depending on the
humidifier capacity) which improves control accuracy compared to the MHB Reflow model.
In case of a humidification/cooling request, the circulation pump starts and one, two, or all
three step valves open (depending on the request). 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.