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6.3 Energy wheel maintenance & cleaning
Depending on the working environment maintenance tasks must be carried out at various time intervals. Frequency
depends on the quality of the air distributed to the energy wheel matrix. It may turn out that self-cleaning effectiveness
is insufficient in given work environment and some manual cleaning will be necessary. Basing on the ASHRAE Standard
62.1 guidelines, please refer to the following list separating the air classes in terms of their pollution.
Air Class
Contamination description
Cleaning
Frequency
Pre-Filtration Class
PN-EN 779
(MINIMUM EFFICIENCY
REPORTING VALUE)
Class 1
Average clean air consisted of low contamination.
Non-odorous and free of toxic fumes. May be found
in office spaces, class rooms, meeting places like
conference rooms, lecture halls, churches.
Every 8 years
G4
Class 2
Moderately contaminated air. Mildly sensory-
irritating. Slightly offensive odours: swimming
pools, restrooms, restaurants, magazines and
warehouses, cloakrooms.
Every 4 years
M5-M6
Class 3
Air of significant contamination concentration with
offensive odours. Marked irritation of the senses
may be felt. Depending on the activities this may
apply to laboratories, hospitals, production areas
involving material processing, shopping centres etc.
Every 1-2 years
F7-F9
Class 4
Highly contaminated air which may be dangerous
for health. Odorous and irritating environment.
Painting shops, processing of harmful materials,
laboratories working with toxic compounds
Swiss Rotors energy recovery wheels are not suita-
ble for application in such work environment
Swiss Rotors recovery wheels cannot be used in highly polluted areas including kitchens: use may cause
an explosion. Expose to air containing oil, aerosols, VOCs will cause the contamination to build upon the
energy wheel surface causing clogging of the air channels.
Swiss Rotors recommends following methods of cleaning:
•
Brush cleaner or vacuum cleaner for small amount of dust deposit which is easy to remove
•
Air compressor burst. Use precaution with keeping an appropriate distance between matrix and compressor nozzle.
Too much pressure can easily damage the aluminium media. Try to keep the minimum distance of 60 mm from the
wheel.
•
Water burst from the appropriate distance of minimum 60 mm from the surface of the energy recovery wheel ma-
trix. Do not use any detergents! Keep temperature below 25°C. Tightly cover all electric parts and bearings while
using pressure water streams.
During manufacturing process there is a chance that some of surplus coating material will remain on the wheel. In such
wheels there is a high probability that surplus material will leave the matrix (especially after first few hours of operation).
This phenomenon is natural and do not affect the efficiency or adsorption properties of the of exchanger in any way.
Use vacuum cleaner to get rid of the surplus material from the surface of the wheel after first 24hour of operating. This
molecular sieve should not be inhaled, SDS of coating is available upon request.
Note that energy recovery wheels are not meant to operate in environment of toxic, flammable or corrosive fumes, or
special application exposed to corrosive / industrial processes or marine environment, exposure to liquid water, paint,
dust or grease from commercial kitchen, for further application guidance contact Seller’s representative.
6.4 Drive Belt – maintenance & replacement
Drive belt requires periodic inspections. Due to material property, belt may stretch, therefore it may require user
to increase the tension, upon inspection.
Obligatorily check the tension after first 24h of the operation and at least once a year while doing general control.
