May 2011
5
2010-8400 Rev F
IV.3. Operating Principle
The compressor sends ltered room air to a solenoid valve,
which allows compressed air to pass to the column in pro-
duction. The columns contain a molecular sieve material
that functions to adsorb the nitrogen from the room air and
thus allow oxygen to pass through.
The oxygen enriched product is then directed to a pressure
reducing valve through the adjustable ow control to the
oxygen product outlet tting.
During this time, the other column being "regenerated" is
connected to the ambient air and a ow of oxygen enriched
product is passed through it (from the column "in produc-
tion"). In this way, when one column is in production, the
other is in a nitrogen desorption or "regeneration" phase.
The oxygen enriched product nally passes through a nal
product lter located prior to the oxygen outlet tting.
IV.4. Alarms - Safety Devices
IV.4.1 Alarm:
•
No voltage detection:
In the event of a loss of mains power, an intermittent audible
alarm is activated. Test alarm by activating the
I/O [On/Off]
switch with power cable unplugged from wall outlet.
•
Power Quality:
A rapidly pulsing alarm is indicative of a power quality
problem that normally will not affect the machines output,
if the problem persists contact your power provider.
•
Process fault:
In the case of a process fault, a visible and audible alarm
is activated (continuous red light and audible alarm, see
p. 7).
•
No Oxygen Flow Alarm (If supplied with unit):
The Nuvo Lite Concentrator has a no ow alarm option.
This device provides a continuous audible alarm in the
event the oxygen ow to the patient becomes blocked.
IV.4. 2. Safety devices
•
Compressor motor:
Thermal safety is ensured by a thermal switch situated in
the motor winding (145 ± 5
o
C).
•
Electrical Protection:
A 5A circuit breaker is incorporated into the front cabinet
of all 230V models. A 10 A circuit breaker is included with
115V models.
Class II device with insulated casings (EN60601-1 stan-
dard).
• Pressure:
A safety relief valve calibrated to 2.7 bar (40 psig) is tted
on the compressor outlet.
IV. 5.3. Maintenance of the system alarms:
• No special maintenance is required.
• The equipment supplier checks that the unit is still operating
correctly when the routine checks are performed on the
MARK 5 Nuvo LITE
.
IV. 6. Technical characteristics
Dimensions: L x W x H:36x23x58.5cm (14 x 9 x 23 in.)
Caster diameter: 5.0 cm (2.0 in.).
Tilt angle (transport with humidi er tted): 30
o
.
Weight: 13 kg. 30 lbs (depends on model)
Noise level: 45 to < 40 dBA (depends on model)
Flow values:
12 postion adjustable ow valve 0.125-5 liters/minute.
(Some models may have other values)
Accuracy of ow supplied:
The ow supplied is equal to the ow set on the owmeter,
accurate to within ± 10 % or 200 ml/min, whichever is the
larger of the two.
Oxygen Concentration:
• at 2 l/min: > 90%.
• at 5 l/min: 90%. (+6.5%/-3%)
(Values at 21
o
C and at one atmosphere pressure).
Max. recommended ow: 5 l/min.
The variation of the maximum recommended ow does not
exceed ± 10 % of the indicated value when a back pressure
of 7 kPa (1 psig) is applied to the output of the device. The
maximum outlet pressure is 50 kPa (7 psig).
IV.5. Indicator Light Function
IV. 5.1 Green Indicator
The green (LED) indicator light indicates that power is
applied to the concentrator and that it is ready to provide
oxygen enriched air to the patient. To be lighted, it is ne-
cessary that the concentrator power plug be inserted into the
wall outlet and that the ON/OFF (
I/0
) switch be actuated.
IV. 5.2 Red Indicator
The red (LED) indicator light is utilized to warn the patient
of a system fault. The two events that can cause the red
(LED) indicator to be lighted are abnormal system pressure
and loss of mains power. The abnormal system pressure
warning red (LED) will light and an audible alarm will
sound when product pressure is outside of normal opera-
ting range. The audible alarm will sound intermittently on
loss of mains power. The red (LED) will also illuminate
on some models. Call the equipment supplier to service
the device.
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