8.3 Cleaning louvers and diffusers
Check the louvers and diffusers at least twice a year, and clean if necessary.
The system supplies fresh air to the building via the duct system and diffusers/louvers. Diffusers and
louvers are mounted in ceilings/walls.
Remove diffusers and louvers and wash in hot soapy water as required. (Diffusers/louvers must be put
back with their original settings and positions in order not to unbalance the system).
8.4 Checking the fresh air intake
Leaves and pollution could plug up the air intake grille and reduce the capacity.
Check the air intake grille at least twice a year, and clean if necessary.
8.5 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 duct runs 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/louver
openings or special inspection hatches in the duct system (if fitted).
Note:
In addition the roof cowl must be checked once a year and cleaned as necessary.
8.6 Changing the Internal Battery
Note:
This procedure requires knowledge of proper ESD protection; i.e. an earthed wristband must be used!
When the alarm ”Internal Battery” is activated and the battery LED lights up red, the battery for backup of
program memory and real-time clock has become too weak. The battery is replaced as described below.
A backup capacitor saves the memory and keeps the clock running for at least 10 minutes after the power
supply is removed. Therefore, if the battery replacement takes less than 10 minutes, there will be no need
to reload the program, and the clock will continue to run normally.
The replacement battery must be of the type CR2032.
1
Remove the cover by pressing down the locking
torques at the edge of the cover using a small
screwdriver, and at the same time pulling the
edges outwards.
Operation and Maintenance Instructions
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Systemair Sverige AB
