Principle Of Operation - Nortec NHRS Series Engineering Manual

1. PRINCIPLE OF OPERATION

(1) The NORTEC NHRS uses an advanced control system to monitor and maintain
optimum operating conditions within the humidifier cylinder.
(2) The NHRS humidifier operates on Potable, DI (De-ionized), or RO (Reverse
osmosis) water supply. All components are suitable for DI/RO water operation as a
standard.
(3) When the unit is activated in the ON position, and there is a call for humidity, the tank
will fill with water through the fill cup located, in the back of the unit.
(4) The water level is being sensed by the float chamber. It contains a dual magnetic
float assembly to ensure accurate water level is maintained in the cylinder. Three
LEDs on the float chamber indicate the water level.
(5) The bottom red LED is the security level to ensure water is above the heating
elements. The middle green light is the optimum operational level for the heating
elements. The top yellow light is the maximum water level. The float chamber
distinguishes 5 different water levels between the red LED and the yellow LED. The
micro-computer can respond to fluctuations in water level to schedule draining and
filling of the cylinder without affecting the steam generating process.
(6) At start up, the floats rise in the float chamber, the internal micro-computer evaluates
the rise of each float to ensure it is equal. This way, the system ensures the fill valve
is functioning properly and that both floats are operational. When the water level
reaches the top indication level, the system will flush the water down to the green
LED. This ensures correct operation of the drain pump and reading of the floats by
the micro-computer
(7) Then, relying on feedback from the signal received by the humidifier, the internal
controller will ensure operation of the contactors to power heating elements.
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2008-02-18