Durr Dental Duo Tandem, Installation And Operating Instructions Manual

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9 Commissioning
In many countries technical medical prod-
ucts and electrical devices are subject to
regular checks at set intervals. The owner
must be instructed accordingly.
❯
Carry out an electrical safety check in accor-
dance with applicable local regulations (e.g. the
German Ordinance on the Installation, Opera-
tion and Use of Medical Devices / Medizinpro-
dukte-Betreiberverordnung) and record the
results as appropriate, e.g. in the technical log
book.
❯
Carry out and document the instruction and
handover for the unit.
A sample handover report is included in
the attachment.
9.1 Checking the switch-on/cut-
off pressure
The switch-on/cut-off pressure is preset at the
factory. Check the adjustment during first start-
up.
When the mains plug is connected the compres-
sor will start after a short delay.
❯
Read off the cut-off pressure from the pressure
gauge.
❯
Drain the air from the pressure tank (e.g. via
the condensate drain valve) until the unit starts
and then close it again.
❯
Read off the pressure when the unit starts up.
If the readings deviate from the values preset at
the factory, adjust the values to the factory set-
tings. If other pressure values are required, take
care to observe the maximum pressure differ-
ence.
9.2 Checking the safety valve
The safety valve must be checked to establish
that it is working correctly when the unit is
started up for the first time.
At the factory, the safety valve is set to
10 bar (1 hPa), checked and stamped.
DANGER
Risk of explosion of the pressure tank
and pressure hoses
❯
Do not change the safety valve set-
tings.
❯
Fill the pressure tank to the cut-off pressure.
WARNING
Risk of damage to the safety valve
Risk of explosion of the pressure tank
and pressure hoses due to a defective
safety valve
❯
Do not use the safety valve to vent the
pressure tank.
❯
When the cut off pressure is reached, turn the
screw of the safety valve several turns anti-
clockwise until the valve begins to blow. Only
allow the safety valve to blow for a short
period.
❯
Turn the screw clockwise as far as it will go.
The valve must now be closed again.
Checking the safety valve – alternative
method:
With this function the safety valve will
open suddenly and emit a very loud blow-
off noise
❯
Press and hold the service key until the
safety valve triggers.
The compressor units keep running as long
as the button is pressed. The defined cut off
pressure is not taken into account.
Assembly
22 9000-610-72/30 1907V007
EN