Nortec Airfog Series, Installation Manual

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Page 31
2008-04-11
(3) Adjust the water regulator valve in the primary water pressure control section until
the gauge reads 25 psig.
(4) The pressure regulator on the vacuum valve should be adjusted to read between 5
and 7 psig.
(5) Manually depressing the thumb screw on top of the vacuum valve will permit water
to flow into the pipes and fill them.
(6) 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 adjustment
AFE, Mini and Octo systems.
(7) Reducing the air pressure feed to the nozzles. Refer to Figure 1 Capacity Output
vs. Vacuum Valve Adjustment and Figure 2 AFE Capacity Chart.
(8) 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.
D. SELF CLEANING CYCLE ADJUSTMENT
(1) The AFE, Mini, and Octo Systems all feature an automatic self-cleaning
mechanism that prevents mineral build-up or dirt from affecting nozzle
performance. 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.
(2) 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:
(a) 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.
(b) 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.