Nortec MES2 - Manual (Page 12)

9 | Introduction
Humidifier Schematic
Figure 7: Humidifier Schematic
How the Humidifier Works
The MES2 is an atmospheric steam generator that uses heat generated by electrical current
flowing between submerged electrodes to generate steam. The MES2 is designed for air
humidification via steam distributor.
Steam Generation
 If the MES2 is configured for On/Off operation then as soon as the safety loop between
terminal 1 and 2 is closed the humidifier assumes 100% demand, closes the power relay on
the control board, and measures the current flowing through the power wire routed through
the control board’s current sensor. If it is configured for modulating operation it waits for a
demand signal and for the safety loop between terminal 1 and 2 to be closed.
From
Contactor
To
Contactor
24 VAC
Power Relay
Control Board
Steam Distributor
Steam Line
Cylinder
Drain Canal
Fill Valve
Condensate Return
Fill Cup
Overflow
Electrodes
Internal Air
Gap
Air Gap
1.25 in.
(3.2 cm)
Drain Valve
External Air
Gap
Current Sensor
High
Water
Sensor