iValve Lift Control Valve 6 Installation and commissioning
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300-I-9010544-EN-01/10.2014
6.3.2 Pipe rupture valve test
A precondition for testing the pipe-rupture valve is that the lift must be
working properly, without any faults.
DANGER!
Uncontrolled descent (free fall)
Leads to death or serious injuries.
Before testing the pipe-rupture valve, make sure that there are no
people or materials in the lift shaft.
1. Load the car to half of its rated capacity
ATTENTION!
Do not carry out the test if the car is too close to the lowest floor.
2. Drive the car to the top floor
3. Prepare the Handterminal
ATTENTION!
Uncontrolled descent (free fall)
Can cause damage to the support frame and car.
The elevator car must come to rest within 3…5metres.
If it does not, immediately release the push buttons on the iCon.
Resolve the problem and repeat the test.
ATTENTION!
Pipe rupture valves do not close completely leakage free.
In case of a simulated pipe rupture, as described in this test pro
cedure, the leakage causes the pipe between the pipe rupture
valve and the lift control valve to assume the same pressure as
the hydraulic cylinder after a certain time.
This pressure compensation causes the automatic reopening of
the pipe rupture valve.
This does not impede the safe function of the pipe rupture valve
in case of an actual pipe rupture, since in case of an actual pipe
rupture the pipe between the rupture valve and the lift control
valve would remain pressure-less, the pressure compensation
would not occur.
If the pipe rupture valve is meant to remain closed after the test,
the pipe between the rupture valve and the lift control valve must
remain pressure-less, e.g. by continuous pressing of the manual
emergency lowering valve.
Reference: 300-I-9010544-EN-01
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