Topvex FR800, FR1600, FR3800
Operation and Maintenance Instructions
Systemair Inc.
24
5
Insert the new filter and fasten it against the inlet seal with the filter support bars.
Make sure the filter is fitted tight all around the frame.
2
There are 4 screws (2 on each side) holding
the heat exchanger block (FR3800 model has
8 screws, 4 on each side). When removing the
heat exchanger start with checking that the screw
marked “A” is tightened properly. Remove the
screw marked “B” completely as shown in the
figure after which the screw marked “A” is loosened
carefully, just enough to allow the exchanger frame
to slide in the tracks
4
Changing pre-filter (only when pre-heater is
installed
A - EL Pre-Heater
B - HW Pre-Heater
After a long time of use dust may built up in the exchanger (pos. 5, figure 1) and block the air flow. It is
important to clean the exchanger regularly to maintain high efficiency. The total heat exchanger in the
Topvex FR800-3800 can be taken out of the unit. Wash in hot soapy water or use pressurized air. Do not
use detergent containing ammonia.
5.3.2 Checking the Heat Exchanger
Note:
Make sure that the rotor motor is not exposed to moisture
5.3.2.1 Dismounting the Heat Exchanger Block on Ceiling Mounted Units
1
Remove the exchanger cover plate in the centre of
the unit by unscrewing the 4 screws in the corners
of the plates.
Removing the plate is only possible after opening
both inspection doors.
A
B
