76
Siemens-Elema AB
E382 E380E 061 01 03 01
Description of functions
Servo Ventilator 300/300A
2
19 Cooling system
19.1 Cooling fan
The
COOLING
FAN
is an axial fan for 24 V
power supply.
If the air temperature inside the power
section exceeds approx. 41°C (106°F), the
21.4
POWER
TEMPERATURE
CONTROL
will turn on
the fan.
The airstream provided by the fan will
ventilate (cool) the inside of the patient unit.
The airstream is divided so that 70% goes
to the power section and 30% goes to the
pneumatic section.
When the temperature drops below approx.
40°C (104°F), the fan is automatically
turned off.
If the input
FAN
CONTROL
on N78 is connected
to ground (CGND), the fan will be on
continuously. This option can also be used
to test the fan.
19.2 Air inlet with dust filter
There is one
AIR
INLET
WITH
DUST
FILTER
situated on the pneumatic section casing.
The dust filter is a fine wire mesh net that
provides filtering of the incoming cooling air.
Service interval 3000 h of operation for
cleaning of the dust filter as described in the
Operating Manual.
Patient unit Power section
The Power section consists of the main
blocks 20 22 which are described below.
20 Mains power
20.1 Mains power inlet
The
MAINS
POWER
INLET
is a male connector at
the power section panel. Two fuses (F11
and F12) and a voltage selector are included
in the
MAINS
POWER
INLET
.
The following table states the voltage
selector setting and fuse value for different
mains power voltages:
Mains power
Selector
Fuses
voltage
setting
F11/F12
100 V (±10%)
100 V
T 3.15 AL
117 V (±10%)
120 V
T 3.15 AL
220 V (±10%)
220 V
T 1.6 AL
230 V (±10%)
220 V
T 1.6 AL
240 V (±10%)
240 V
T 1.6 AL
Mains frequency is 50 60 Hz.
The NTC resistor, soldered to the
MAINS
POWER
INLET
, works as an inrush current
limiter.
20.2 Transformer
The
TRANSFORMER
is a toroide transformer
rated 235 VA. A temperature fuse, included
in the transformer, will blow if the
temperature exceeds 110°C (230°F). The
fuse is not resetable and not replacable;
replace the transformer if the fuse has
blown.
20.3 Capacitor
The capacitor shown in this main block is
the rectifier smoothing capacitor. The
capacitor is rated 40 V DC, 22000 µF.
Содержание Servo Ventilator 300
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