Nortec ME Direct Feed - Manual (Page 26)

26 Maintenance
5.2 Maintenance Intervals
In order to maintain operational safety and hygienic demands the Nortec ME Direct Feed must be serviced
at regular intervals. The time interval for the complete system service is to be adapted to the operating
conditions. The hygiene status depends mainly on the quality of the humidifier water but also on the
adherence to the exchange intervals of the upstream air filter, the air velocity and the micro-biological
and chemical composition of the supply air. Therefore the service intervals must be determined for each
system separately.
The interval time for a complete system service is to be determined at commissioning. A typical interval
time is 2000 hours of operation.
Depending on the encountered hygiene status when performing a complete system service the interval
time must be decreased or increased.
In any case the Nortec ME Direct Feed should receive a complete service at least once annually.
Note: We recommend to perform a minor service between two complete system service.
5.3 Maintenance guide
The Nortec ME unit will form part or your hot and cold water system and as such require you to undertake
certain duties with regards to local regulations and bylaws concerning the control of Legionella microbes
in water systems. Your water sampling / testing and disinfection regime must be based on results of a
site specific risk assessment.
If any further assistance is required or you are interested in a planned maintenance quote, please contact
your Nortec distributor .
Note: routine water sampling and testing is not included as part of a Nortec service contract.
Please note that the information given in the table below is only to act as a guide which shows the work
to be carried out on “Minor Service” and “Complete System Service”.
Correct maintenance is vital to ensure optimum output, reliability and safety.
Operations Minor
Service
Complete
System Service
Replace inlet water filter if applicable Yes Yes
Check all solenoid valves Yes Yes
Clean all solenoid valves ––– Yes
Replace purge valve flow restrictor (if applicable) ––– Yes
Check all hoses and connectors Yes Yes
Check flow restrictors in hydraulic manifold ––– Yes
Clean inlet valve strainer ––– Yes
Replace all feed hose ––– Yes
Check distribution headers Yes Yes
Clean distribution headers ––– Yes
Clean front section of tank Yes Yes
Check droplet separator (if applicable) and evaporator cassettes in suit-
able condition
Yes Yes