Supply and Connections
Electrical power supply
The ventilator is designed for a mains voltage of:
either : 220 V to 240 V
or : 100 V to 127 V
● Insert the plug in the mains socket.
For operation with DC power unit and external battery
(option)
either : 12 V
or : 24 V
● Connect the external battery by cable.
Note on the use of a socket strip for ancillary
equipment
Connecting other devices to the same extension socket
strip may, in the event of earth failure, cause the current
leakage to the patient to increase beyond the permissible
values.
In this case, the risk of electric shock cannot be
eliminated.
Temporary interruption of power supply
e.g. if hospital reserve power supply is activated.
Without the 12/24 V DC power unit:
During a power interruption, Evita 4 outputs a continuous
alarm tone for max. 2 minutes.
The duration of this alarm tone may be shorter if Evita 4
was switched on for less than 15 minutes.
Evita 4 tolerates power interruptions shorter than 10 milli-
seconds – without any effect on ventilation.
In the case of power interrupts lasting longer then
10 milliseconds, the machine restarts with a short self-
test lasting about 4 seconds – ventilation is continued
with the same values that were set before the power
interruption.
If a lower alarm limit has been set for the minute volume,
the MV low alarm is activated until the measured value
has risen above the lower alarm limit.
With 12/24 V DC power unit (option):
Follow Instructions for Use of Evita 4 DC option
(DC power supply).
Preparation
Supply and Connections
36
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