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Chapter 4
– Using the Control Panel
4.4.11 Filter Load Index Setting
The filter load indices are used by the filter life monitor for a more accurate calculation of the remaining filter life.
The filter load indices are based on air pollutant groups that have particular impact on the life of the system’s filters.
Each index can be adjusted to reflect the pollution levels in a certain indoor environment.
The Filter Load Index Menu allows to view and modify the filter load indices for:
•
Large Dust
•
Fine Dust
Large Dust Index:
This index is based on the group of coarse or heavy dust. This dust can contain particles with
several millimeters in length down to particles a mere 0.003 mm in size. This type of dust will generally settle within
an hour after generation or agitation on top of surfaces. It consists of fibers, pollen, spores, dander, wood dust, etc.
Fine Dust Index:
This index is based on the group of fine dust particles. This type of dust is smaller than 0.003 mm
(3 μm) in size and will remain airborne for long periods of time. This dust group is made up of small combustion
particles that are created as the result of combustion processes of automobiles, small allergen particles such as cat
allergens, tobacco smoke particles, etc.
4.4.11.1 Determining the Filter Load Index
The setting for each of the filter load indices can range from “very low” to “very high”. The system is supplied with
the following default settings:
•
Large Dust Index:
average
•
Fine Dust Index:
average
There are a number of factors that may make a modification of the default settings necessary in order to ensure the
most accurate filter life display possible.
Tobacco Smoke
The amount of tobacco smoke in the room air can have a significant effect on filter life. If tobacco smoke exposure is
regular, the filter load indices for each pollutant group should be adjusted to “high” or “very high”.
Dusty Environments
Environments with a high dust levels are likely to shorten the lives of the pre-filter and the HEPA-filter. If there is a
frequent high dust content in your environment, set the Large Dust Index to “high” or “very high” (Tobacco smoke
exposure should not be used for the definition of a “dusty environment”).
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