Nortec NHRS, Engineering Manual

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10-10
Page 3
2008-02-18
D. VARIABLE AIR VOLUME (VAV) CONTROL SYSTEM
(1) NORTEC offers several VAV control packages where VAV or variable duct
temperature, air flow or humidity conditions require additional control flexibility.
2. STANDARD FEATURES AND BENEFITS
(1) NORTEC NHRS humidifiers can be suited for all humidity control applications.
Resistive heating elements satisfy controller requirements instantaneously for rapid
control with minimum deviation. NHRS units produce pure atmospheric clean steam
on Potable, DI, or RO water operation. Fully variable steam output from 0 to 100%
of capacity is achieved by electronic power control of the resistive heating elements.
When using with deionized water(<20 micromhos) the NHRS with SSR option can
control relative humidity to ± 1%. The unique design of the stainless steel cylinder
ensures the process is not affected by water fill cycles.
A. INTEGRAL DRAIN WATER COOLER (DWC)
(1) NHRS has a standard internal Drain Water Cooler to meet plumbing codes by
tempering the drain water below 140°F (60°C) during normal operation.
B. TWO-LINE ALPHANUMERIC LIQUID CRYSTAL DISPLAY (LCD)
(1) The NORTEC NHRS has a two line display, which provides important operating
data using text for system messages and numbers. Operating status, performance
data and defined parameters can be accessed and displayed. Its principle
language is English, but the NHRS can display in French, on the user level.
C. AUTOMATIC SYSTEMS TEST
(1) Each time a NORTEC NHRS humidifier is started, it automatically undergoes a
self-test. It checks the correct operation of the PC board and other components
including the fill valve and drain pump. The humidifier will display system faults
with the alphanumeric display and the indicator lights.
D. AUTOMATIC END OF SEASON DRAIN
(1) After 3 days of no call for humidity the steam production tank will completely drain
the cylinder and automatically restart upon a call for humidity. Does not apply if
keep warm feature is activated.
E. AUTOMATIC DETECTION, RESPONSE, AND SYSTEM MESSAGES
(1) Operation is monitored continuously by an automatic check program. When
unacceptable deviations from normal operation are detected (such as no water
entering humidifier or, improper water level), the NHRS responds by taking
appropriate action. Corresponding system messages are displayed on the LCD.
By identifying the specific service messages, troubleshooting is simplified and
problems external to the unit are more easily diagnosed. For non-critical service
messages, the NHRS continues to operate and displays a service message on the
LCD and illuminates the yellow light.
F. SIMPLE INSTALLATION
(1) The compact construction of the NHRS allows for a simple installation. The NHRS
comes standard with key hole mounting locations, and is ready for field connection.