Durr Dental Tornado 1, Installation And Operating Instructions Manual

Page: 29 / 48

❯
Measure the maximum current consumption
(this is the value just before the cut-off pressure
is reached).
If the reading deviates from the recommended
setting then the motor protection switch needs
to be adjusted (see "10.2 Adjusting the motor
protection switch").
9.2 Checking the switch-on/cut-
off pressure
The switch-on/cut-off pressure is preset at the
factory. Check the setting during first start-up.
❯
Switch on the unit at the pressure switch by
rotating it to the position "I AUTO".
❯
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 switches
on.
If the readings deviate from the values preset at
the factory, adjust the pressure switch to the
factory settings.
bar
0
4
8
12
16
7,8 bar
(0,78 MPa)
9.3 Checking the safety valve
Correct operation of the safety valve must be
checked when the unit is started up for the first
time and again subsequently at regular intervals.
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.
❯
Switch on the unit at the pressure switch and
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.
❯
To open, rotate the screw of the safety valve
anti-clockwise until the valve begins to blow
off. Only allow the safety valve to blow for a
short period.
❯
Then turn the screw clockwise as far as it will
go to close the valve. The valve must now be
closed again.
9.4 Draining the condensation
water
Temperature changes during transport may
cause condensation water to accumulate in the
pressure tank. The condensation water can only
be drained from the pressurised pressure tank.
❯
Switch on the unit at the pressure switch and
wait until the cut-off pressure is reached.
Assembly
9000-610-60/02 1909V007 27
EN