5.3.3 Checking the fans
Even if the required maintenance, such as change of filters, is carried out dust and grease may slowly
build up inside the fans (pos.1 and 2, figure 3 ). This will reduce the efficiency.
The fans can be dismounted by loosening the 4 screws on the fan casing (figure 8. They may be cleaned
with a cloth or a soft brush. Do not use water. White spirit can be used to remove obstinate settlements.
Allow drying properly before remounting.
Fig. 8 Dismounting the fans
5.3.4 Cleaning extract louvres and inlet diffusers
The system supplies treated outdoor air to the building and extracts the used indoor air via the duct system
and diffusers/louvres. Diffusers and louvres are mounted in ceilings/walls in bedroom, living room, wet
rooms, WC etc. Remove diffusers and louvres and wash in hot soapy water if required. Diffusers/louvres
must be put back with their original settings and positions in order not to unbalance the system.
5.3.5 Checking the outdoor air intake
Leaves and pollution could plug up the air intake grille and reduce the unit’s capacity. Check the air intake
grille at least twice a year and clean if necessary.
5.3.6 Checking the duct system
Dust and grease settlements may build up in the duct system even if filters are changed regularly. This
will reduce the efficiency of the installation. The ducts should therefore be cleaned/changed when
necessary. Steel ducts can be cleaned by pulling a brush, soaked in hot soapy water through the duct via
diffuser/louvre openings or special inspection hatches in the duct system (if fitted).
Topvex FR03, FR06, FR08, and FR11
Operation and Maintenance Instructions
206575
19
Systemair AB
