4.4.2 Filter Life Monitor
The IQAir system is equipped with an electronic Filter Life Monitor that calculates the remaining life of the sys tem’s
lters. Thanks to the Filter Life Monitor, the user does not have to guess when lters need to be replaced or replace
them at xed intervals (which rarely correspond to the actual amount of use). The Filter Life Monitor keeps track of
the most important factors affecting the life of the individual lters. The Filter Life Monitor display shows the
remaining life of each individual lter at any given time at the selected fan speed.
1. To reach the Filter Life Monitor display from the main display win dow,
press the Menu key once. The remaining life of the Pre-Filter will appear.
2. Press the p key to view the remaining life of the other lters in the system.
3. The remaining life of the lters is expressed in hours of operation at the
current speed setting. Filter Life will adjust whenever the fan speed is
changed. If the filter is beyond its useful life, a negative number will be
displayed.
How the Filter Life Monitor Works
The basis for calculating the remaining lter life is the already elapsed operation time at the set fan speed. This input
is compared with an internal memory bank which contains infor mation about the different lters’ lives under specic
conditions of use.
The Filter Life Monitor makes a calculation of the remaining lter life, taking into account not only past use of the
system, but also likely future use. As reference for future use, the Filter Life Monitor uses the fan speed which is set
at the time.
The relationship between the current fan speed and the remaining lter life displayed can be expressed as follows:
The higher the current fan speed setting, the shorter the displayed remaining lter life.
7. Filter Life Reset
Allows the resetting of the lter life counter after replacing a lter.
8. Airow Units
Allows to switch the airow units between cfm (cubic feet per minute)
and m3/h (cubic meters per hour).
9. Language
Allows to switch the display language.
10. Service Access
This menu is designed for factory access only.
12
Chapter 4 – Using the Control Panel
