WZA
School ventilation
Assembly, installation and operating instructions
28
11
Maintenance
11.1 Securing against reconnection
DANGER!
Risk of death by unauthorised or uncontrolled restart!
Unauthorised or uncontrolled restarting of the equipment can result in serious injury or death.
Before restarting, ensure that all safety devices are fitted and working properly and that there is no haz-
ard to humans.
The units are switched off by a factory-fitted safety switch when the service door is opened. We nevertheless recommend se-
curing the units to prevent them from being started up again accidentally.
Always follow the procedure described below to prevent accidental restart:
1. De-energise the units by disconnecting the mains power plug.
2. Prevent accidental re-connection.
3. Check that the equipment is de-energised.
4. Cover and cordon off adjacent live parts.
11.2 Maintenance Schedule:
The sections below describe maintenance work needed for the proper and trouble-free operation of the equipment.
If there are signs of increased wear during regular checks, shorten the required maintenance intervals to the actual wear and
teat. Contact the manufacturer with any questions about maintenance work and intervals.
Interval
Maintenance task
Personnel
As required
Regular visual checks and acoustic checks for
damage, dirt and function.
User
every six months
Check the electrical wiring.
Qualified personnel
every six months
Clean components/surfaces that come into con-
tact with air.
Qualified personnel
