IQAir GCX AM User Manual Download Page 6

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Menu Key

The

Menu

key allows access to any one of ten menus. Pressing the

Menu

key once allows access to the first menu

function. Pressing the

Menu

key twice allows access to the second menu function, and so on. If no key is pressed for

15 seconds in a menu window, the display will revert to the main display window.

Tip:

If you are in a menu window

and would like to remain in the window for more than 15 seconds, keep the

key depressed.

Enter Key

The

Enter

key, if pressed for 3 seconds, allows the modification of a setting. The enter mode is indicated by a flashing

cursor on the modifiable setting. Pressing the

Enter

key again will save any entry and move the cursor to the next

modifiable item in the display window. When the last modifiable choice in a window is confirmed with the

Enter

key,

the enter mode is automatically terminated and the new settings are saved.

Filter Life LEDs:

Whenever the system is on, the color of the filter life LEDs (light emitting diodes) indicates the state

of the in di vidual filters in the system.

Note:

The positions of the filter life LEDs on the control panel correspond to

the actual positions of the filters within the system.

The filter life indicator LEDs signal four possible stages in the life of the filter:

1. Green:

The filter is still within 80% of its estimated life span.

2. Orange:

The filter is approaching the last 20% of its estimated life span.

3. Red:

The filter has reached the end of its estimated life span.

4. Red blinking:

The filter has passed its estimated life span and should be replaced immediately. The IQAir®
system’s effectiveness is likely to have been reduced dramatically, either due to a reduction in
airflow (particle filters are clogged) or a reduction in filter efficiency (gas phase filter is saturated).

Fan Speed LEDs:

These LEDs simulate the fan speed through the frequency of their rotation. The faster the rotation

of the fan speed LEDs, the faster the actual fan speed of the unit.

4.2 Control Panel Locking Function

The control panel keys can be locked to avoid tampering with the
settings. To lock or unlock the control panel keys, both the

Menu

and

the

Enter

key have to be pressed down simultaneously for 3

seconds. The acti

vated locking function is indicated with a star

symbol in the control panel display. The locking function is cancelled
by disrupting the power supply.

4.3 Fan Speed and Air Delivery

The IQAir® system can be set to run at six different fan speeds, which correspond to six different airflow rates. Speed
1 is the lowest speed. Speed 6 the highest fan speed. The higher the fan speed, the more room air will be filtered by
the system. The high fan speed settings provide additional air cleaning power to deal with situations of elevated
pollution levels.
To allow better evaluation of the system’s performance at different fan speeds, the standard display window shows
not only the fan speed, but also the air delivery rate (airflow). The displayed airflow is factory preset and is not
measured by the system itself.

4.3.1 Regulating Fan Speed

When the IQAir® system is switched off (standby mode), the first line of the
LCD display shows the model name. To switch the system on, press the

Power

key on the far left of the control panel.

The LCD now displays the fan speed and the corresponding airflow rate.

Note

: The system starts at the fan speed at which it was running when it

was last used.

To change the fan speed, press the

key.

4.3.2 Air Exchange Rates in Differently Sized Rooms

Any air cleaner can only be effective if it filters a sufficient amount of air in an indoor environment. For general air
cleaning purposes, the IQAir® system should be able to filter the room air volume at least twice every hour on the set
fan speed to achieve a significant air quality improvement. If the intensity of the pollution source is high or a high
degree of purification is needed, more air changes may become necessary. In order to achieve the desired number
of air changes, more than one air cleaner may be required.

The number of air changes that are necessary to attain a certain level of indoor air quality will depend on a variety
of factors, including:

•

Intensity of air pollution source:

The higher the rate at which air pollutants are produced or enter the indoor

environment, the higher the air cleaning rate in the room needs to be.

•

Filtration efficiency for specific air pollutants:

The lower the filtration efficiency for certain pollutants, the more

air changes are required to reduce these pollutants.

•

Desired improvement in air quality:

The higher the desired improvement in air quality, the more air changes are

required.

The number of air changes per hour (ACH) produced by an IQAir® system in a specific environment are calculated
as follows:

hourly air delivery of the IQAir® system (cfm)

= air changes per hour (ACH)

air volume of the room (cu.ft.)

N.B. The air delivery rates of the IQAir® system at the various fan speeds settings are listed on the “Technical
Specifications” sheet.

Example calculation:

A room with the dimensions of 13 x 14 x 8.5 ft. has an air volume of 1,547 cu.ft. With an air
delivery rate of 140 cfm, the room air volume will be circulated over 5.4 times per hour by the
IQAir® system (140 cfm = 8,400 cu.ft/h; 8,400 cu.ft/h ÷ 1,547 cu.ft = 5.43 ACH).

4.4 Using the Menu Functions

The IQAir® c ontrol panel offers a choice of several menu options which allow access to the advanced features of the
system. In total there are ten active menu functions. The functions can be accessed in standby or running mode.

4.4.1 Menu Overview

Pressing the

Menu

key accesses the menu functions in the following order:

1. Filter Life Monitor

Allows the viewing of the remaining filter life of the individual filters
within the system.

2. Setting the Timer ON period

Allows to activate the timer and set the Timer ON period.

3. Automatic Timer

Allows to deactivate the Timer ON period on certain days of the week.

4. Timer ON Speed Selection

Allows to set the fan speed for the Timer ON period.