Topvex FR800, FR1600, FR3800
Operation and Maintenance Instructions
Systemair Inc.
26
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 1). This will reduce the efficiency.
The fans can be dismounted by loosening the 4 screws on the fan casing (figure 5). Topvex FR1600-3800
have a fan support bracket that needs to be removed by loosening the 4 screws. The fans may be cleaned
with a cloth or a soft brush. Do not use water. A mild solvent can be used to remove obstinate settlements.
Allow drying properly before remounting.
Fig. 5 Dismounting the fans
5.3.6 Cleaning Extract Louvers and Inlet Diffusers
The system supplies treated outdoor air to the building and extracts the used indoor air via the duct system
and diffusers/louvers. Diffusers and louvers are mounted in ceilings/walls in bedroom, living room, wet
rooms, bathrooms etc. Remove diffusers and louvers and wash in hot soapy water if required. Diffusers/
louvers must be put back with their original settings and positions in order not to unbalance the system.
5.3.7 Checking the Outdoor Air Intake
Leaves and other debris 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.
5.3.4 Checking the Hot Water Heating Coil
After long periods of operation (usually several years) dust may have deposited on the surface of the coil.
This may reduce coil capacity. The coil can be cleaned with a pressure washer with misting jets, or with
compressed air. Cleaning should be carried out carefully so as not to damage the coil’s aluminum fins.
Once a year the coil water circuit needs to be vented to maintain the coil capacity
5.3.5 Checking the Electrical Heater
After a long period of time dust and pollutants can build up on the heating rods. This can cause unpleasant
odors and, in the worst case, fire. Clean with compressed air, vacuum or brush. The heating power can
be measured, in the electrical connection box, before the heating season. The heater rods need to be
measured to ensure there are no discrepancies in resistance between them. The automatic safety function
needs to be tested and verified.
