CAIRplus Safety and User Instructions
PR-2009-0096-GB • Subject to modifications • R8-10/2015 11
For all kinds of work:
Jobs on the unit can only be carried out if
– all poles for the power supply are disconnected
– the unit is secured to prevent inadvertent energising (also refer to "Electrical haz-
ard")
– all moving components - in particular - fan impeller, motor, rotary heat exchanger,
control and shut-off dampers – have come to a standstill: wait at least 5 minutes after
deactivating the unit
– the heat exchangers have cooled down to reach ambient temperature
Upon completion of jobs on the unit ensure that
– all protective devices are operating properly – for example, the fan safety devices
(door protection grille, contact guard) are locked
– no persons are present in danger areas.
Risk of personal injury!
No matter what kind of jobs are performed on the unit, there is always a risk of
cuts by thin sheet metal and heat exchanger fins. In particular, this aspect applies
when carrying out maintenance and cleaning work on the surfaces of heating and
cooling coils.
• Wear suitable protective clothing.
Before commissioning and after maintenance of the unit there is an increased
risk of injury:
• Ensure that no persons are locked inside the unit. Walkable surfaces of the
unit are equipped with emergency levers on the interior side of doors. Smaller
units must provide a protection against inadvertent locking by using padlocks
on the door stop.
An operating unit poses a risk of injury:
– Danger of impacts by opening doors arranged on the discharge side
– Danger of crushing resulting from negative pressure applied to doors on the suc-
tion side
– Danger resulting from rotating parts such as fans etc.
– Danger of hot surfaces and/or media
Units equipped with coolers with a refrigeration circuit pose additional risks.
• Observe all the safety notes contained in Chapter "commissioning/maintenance
of integrated refrigerating systems" on page 80.
ATTENTION
Risk of damage to the unit!
If dampers are abruptly shut during unit operation, the unit can be damaged
beyond repair as a result of negative pressure or overpressure.
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