Introduction; Airfog Definition; Nortec Airfog Family Of Products; Afe Principle Of Operation - Nortec Airfog Series Installation Manual

1. INTRODUCTION

Prior to installing any AIRFOG product carefully READ through this entire guide, it contains
valuable information, which will assist in all aspects of the installation.
A. AIRFOG DEFINITION
(1) NORTEC AIRFOG systems use the nozzle humidification technology of injecting
droplets of cold water directly into the air. This method of humidification has the
following advantages over steam humidification:
(a) Lower frequency of maintenance.
(b) Systems are mainly mechanical (water pipes and air pressure) with only a 24
VAV power requirement in the control panel.
(c) A "no cost" air cooling benefit due to latent heat of vaporization extracting
heat from the air.
(d) Maintenance is primarily focused on keeping the air compressor operational.
(e) Change of components is fast and requires minimal system disassembly.
B. NORTEC AIRFOG FAMILY OF PRODUCTS
(1) The AirFog family is Nortec most advanced adiabatic humidifiers. There are
groups of products that fall in this family: applied products and packaged products.
(2) The applied products group describes systems that are tailored specifically for
each application. Two products fall under this category:
(a) HP HVAC uses high-pressure water to create a very fine mist for spray into
ducts and air-handlers.
(b) AFE Nozzle systems use compressed subsonic air flows and water to create
a fine mist that is sprayed directly into a space.
(3) The packaged products group describes systems that are ready to operate out of
the box, and need only be connected to power, air, and water. These products
include:
(a) AFE Mini: Systems are wall mounted and have 1 or 2 AFE nozzles.
(b) AFE Octo: Systems are ceiling mounted and available in many configurations
including modulating versions, and have between 3 and 8 AFE nozzles.
(4) This manual describes the installation, operation, and maintenance of all AFE, Mini
and Octo systems.
C. AFE PRINCIPLE OF OPERATION
(1) The AFE nozzle uses air flow and the Bernoulli principle to siphon water out of
zero psig water distribution pipes. Increases in air velocity (by increasing air
pressure) will increase the vacuum pressure and increase the rate that water is
siphoned into the nozzle. As the water exits the nozzle it is broken down into a
fine mist by a shearing action. Increases in air supply pressure also means that
the exiting mixed flow is at a higher velocity.
NOTE
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2008-04-11