Topvex Series
BFT - Filter replacement instructions
Systemair Inc.
1
1 Changing Supply/Extract air filter
The bag filter cannot be cleaned and must be changed when necessary. New filters can be ordered from
Systemair. Operation time between filter changes depends on the air pollution at the installation site. A
differential pressure switch indicates when it’s time to change the filters. This will trigger an alarm in the
control panel.
When this occurs do the following:
1. Replace the filters with new ones as described below
2. Acknowledge the alarm by pressing the red button on the control panel (pos. 1 figure 4 in the Operation
and Maintenance manual for Topvex) followed by OK (pos. 4 figure 4 in the Operation and Maintenance
manual for Topvex).
3. Choose
→Acknowledge
by pressing OK
The filters are taken out by releasing the filter locking handle as shown in (Step 1) below after which the
filters can be taken out and replaced (Step 2) below.
1
Releasing the filter locking handle
2
Changing filters
3
Changing pre-filter (only when pre-heater is installed)
1.1 Topvex TR Changing Supply/Extract air filter
4
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.
