iCOM
Controls Training and Service Manual
Next Maintenance Calculation
Foreword
The next maintenance calculation will help run the Liebert Environmental unit in an
optimum way to ensure minimum component stress resulting in increased
reliability.
Calculation of next Maintenance Parameters
The following components are included in the calculation individually:
•
Fan(s)
•
Compressor
1
•
Compressor
2
•
Electric
Heaters
•
Humidifier
For
each individual component
the next maintenance will be calculated from
following parameters:
1. Standard service interval: No, 1 through 12 times per year (programmed by
the customer).
2. Working hours (counted by control).
3. Number of starts (counted by control).
4. Average running time (calculated by control).
5. Optimum number of starts per hour (programmed by the customer).
6. Maximum number of starts per hour (programmed by the customer).
7. Maximum bonus to enlarge time to next maintenance (calculated by
control).
8. Maximum penalty to reduce time to next maintenance (calculated by
control).
Maintenance Calculation
Basic: maintenance frequency (1). The control counts the working hours of the
component, as well as the number of starts.
The working hours and the number of starts are compared with the programmed
optimum/maximum starts per hour. This results in “Wellness Factor”.
This factor, in accordance to the service interval, will add a “Bonus” to increase the
time before the next maintenance, or will add a “Penalty” to decrease the time
before the next maintenance.
In simple words: If a component starts very often,
the time to next maintenance will be decreased, if it starts rarely, the time to next
maintenance will be increased.
46
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