Mains power failure
42
HDK350_EN_01_2005-05-10
Shutdown and restart dryer
In the following cases, the dryer must be fully shut down and depressurised:
In the event of an emergency or malfunction
For maintenance work
For dismantling
Risk of injury from escaping compressed air!
Never remove any parts of the dryer, or manipulate the same in any way,
as long as the unit is pressurised! Suddenly escaping compressed air
might cause serious injuries.
Prior to any work, release all pressure from the unit.
Mains power failure
In the event of a power failure, follow the instructions below:
In the event of a power failure, or when the dryer is switched off with the ON/OFF
switch
all main valves are closed
all expansion valves are closed
As a result
the pressure at the inlet side of the dryer is increased, while the compressor
is on (until the compressor is automatically switched off by the control
system),
the pressure in the vessel (without start-up device) is reduced, as the
compressed air outlet valve is open, while compressed air is taken in from
the pipeline system,
no compressed air is fed to the downstream compressed air system.
Note:
If the unit is equipped with a compressor synchronisation system, first
switch off the compressor and then wait until the dryer has reached
the standby phase before switching it off with the ON/OFF switch.
This ensures that the regeneration cycle is completed, and that the
pressure in both vessels is at the same level.
Note:
As soon as the dryer is switched on again, the programme continues
the cycle from the point at which it has been stopped.
Summary of Contents for HDK 50/100
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