Nortec AIRFOG Series - Manual (Page 31)

AirFog Installation Manual | 27
The on/off valve of the primary water pressure control section is turned ON. The handle should
be in line with the pipe (as opposed to 90 degrees to it).
Adjust the water regulator valve in the primary water pressure control section until the gauge
reads 25 psig. The pressure regulator on the vacuum valve should be adjusted to read between
5 and 7 psig.
Manually depressing the thumb screw on top of the vacuum valve will permit water to flow into
the pipes and fill them.
AIRFOG water throughput can be controlled at the control panel by adjusting the air pressure.
This air pressure must never be greater than 75 psig. If water spray should reach the floor, then
the water throughput can be reduced by adjusting the air pressure, droplet size, or both as
described the following paragraph. Reducing the air pressure feed to the nozzles. Refer to
Figure 25: Capacity Output vs. Vacuum Valve Adjustment and Figure 26: AFE Capacity Chart.
Water flow through the nozzles can be adjusted using the thumb-wheel on the vacuum valve.
Turning the thumb-wheel clockwise will lower water flow through the valve, which will cause a
finer mist from the nozzles and a lower capacity. Turning the thumb-wheel counterclockwise will
raise the water flow through the valve, which will cause a coarser mist from the nozzles and
increased capacity. The optimal setting for the valve is a balance between capacity and spray
length. If the spray is reaching the floor or wetting equipment, try turning the thumb-wheel
clockwise. If the room is not receiving enough humidity, try turning the thumb-wheel counter-
clockwise. Some experimentation may be necessary to obtain the best results. Please refer to
Figure 1: Capacity Output vs. Vacuum Valve Adjustment for more information.
Self Cleaning Cycle Adjustment
The AFE, Mini, and Octo Systems all feature an automatic self-cleaning mechanism that
prevents mineral build-up in the nozzle tip. Buildup of lint, dust, or other materials on the
exterior of the nose cone can affect nozzle performance. Nozzles should be inspected and
cleaned periodically to remove any buildup. This mechanism activates whenever air pressure
falls below 10 psig. This will occur every time the humidistat cycles the nozzles off based on
demand, or when the unit is manually switched off. Additionally, a timer is included that allows
the user to set automatic cleaning cycles (off time), which occur after a period of operation.
The timer is a white box with several dials on the front of it. The timer can be removed (after the
unit has been powered off) for ease of adjustment; simply pull on the timer to remove it. To
adjust the timer:
 The upper white dial and blue dial control the length of the time the system will remain on
for (T
on
). The white dial is used to set the scale, and the blue dial is used to set the value.
For example, to have the unit remain on for 4 hours before powering off, turn the white dial
to point at 1-10h, and then turn the blue dial to point at 4.
 The lower white and blue dials control the length of time the system will remain off for one
the timer cycles it off (T
off
). The white dial sets scale, and blue dial sets the value. For
example, to have the unit remain off for 2 minutes, set the white dial to 1-10min, and then
turn the blue dial to point at 2.
If the timer were set as in the above examples, the system would run for 4 hours, shut off for 2
minutes, run for another 4 hours, shut off for 2 minutes, and so on and so forth.
Note: The humidistat takes precedence over the timer for shutting down the system. If the
humidistat reaches its set point, it will shut the system off regardless of the timer to
prevent over humidifying the space.