CAIRE LIBERATOR 20, LIBERATOR 30, LIBERATOR 37, LIBERATOR 45, LIBERATOR 60 Service manual
L IBERATOR 20
30
37
45
60
Liberator
L IBERATOR
S E R V I C E
M A N U A L
I Preface
Page 2
SERVICE MANUAL
LIBERATOR 20
LIBERATOR 30
LIBERATOR 37
LIBERATOR 45
LIBERATOR 60
CAIRE, Inc.
3505 County Road 42 West
Burnsville, MN 55306-3803
Customer/Technical Service:
Toll Free Phone (U.S.A.): 1-800-48 CAIRE (1-800-482-2473)
Toll Free Fax (U.S.A.): 1-888-WE CAIRE (1-888-932-2473) (To place an order)
Phone: 1-952-882-5000
Fax: 1-952-882-5178
This manual covers use and maintenance of the Liberator 20, Liberator 30, Liberator 37, Liberator 45, and Liberator 60
units (see below). It is intended for use by experienced personnel only.
No attempt should be made to fill or maintain this equipment until both this manual and Patient Operating Instruction
booklet have been read and fully understood.
The following abbreviations are used throughout this manual:
FCV — Flow Control Valve PRV — Primary Relief Valve
LED — Light Emitting Diode QDV — Quick Disconnect Valve
LO2 — Liquid Oxygen RA — Return Authorization
LPM — Liters Per Minute RP — Repair Procedure
NER — Normal Evaporation Rate R/R — Removal and Replacement
POI — Patient Operating Instructions SRV — Secondary Relief Valve
Definition of Terms
WARNING Description of a condition that can result in personal injury or death.
CAUTION Description of a condition that can result in equipment or component damage.
NOTE A statement containing information important enough to emphasize or repeat.
(ITEM) Item numbers used throughout this manual are shown on the illustrations beginning on page 35.
Model Side Fill Top Fill Dual Fill
(0-6 LPM)
L20 10562007 10564150 10660379
L30 10561995 10564133 10564176
L37 10562023 10564168 10660328
L45 10562015 10564141 10564184
L60 11068983 11069020 11208641
Model Side Fill Top Fill Dual Fill
(0-10 LPM)
L20 10879389 10879434 10879477
L30 10879400 10879442 10879493
L37 10879418 10879451 10879514
L45 10879426 10879469 10879522
L60 11075905 11075921 11374892
Model Side Fill Top Fill Dual Fill
(0-15 LPM)
L45 11177805 11018951 TBD
L60 11075948 11075972 11374876
IITable of Contents
Page 3
I. Preface 2
II. Table of Contents 3
III. Equipment Description 4
IV. Specifications 5
V. Safety 6
VI. Theory of Operation 7-9
VII. Unpacking/Setup Instructions 10
VIII. Operation 11-12
IX. Routine Maintenance 13-14
X. Troubleshooting/Repair 15
Troubleshooting Chart 16-17
Repair Procedures 18-31
Service Tools/Equipment/Supplies 32
XI. Parts Illustration (Top Fill G3.0 Units) 35
Parts Illustration (Side Fill G3.0 Units) 38
Parts Illustration (Dual Fill G3.0 Units) 42
Parts Illustration (Dual Fill G3.1 Units) 45
Parts Listing (Top Fill G3.0 Units) 33-34
Parts Listing (Side Fill G3.0 Units) 36-37
Parts Listing (Dual Fill G3.0 Units) 39-41
Parts Listing (Dual Fill G3.1 Units) 43-44
XII.Ordering Information/Return Policy 46-47
III Equipment Description
Page 4
The CAIRE Liberator is the stationary component of the
Liberator/Stroller supplementary oxygen system. The
Liberator incorporates a stainless steel cryogenic container
with the valves, plumbing, and associated hardware required
to deliver gaseous oxygen to the patient at near ambient
temperature.
The Liberator is comprised of four major assemblies.
Grouped according to function, they are:
1. Cryogenic Container – This assembly is a double walled,
vacuum insulated dewar for storing liquid oxygen at approximately -300 degrees Fahrenheit. The inner pressure vessel is designed to safely hold liquid oxygen and
is protected from over pressurization with the primary relief valve. The vacuum insulation between the inner and
outer vessel keeps the outside heat from evaporating the
cold liquid
2. Breathing Circuit – This circuit consists of the manifold
assembly, fixed orifice rotary flow control valve (FCV),
a breathing coil, and a warming coil. It withdraws liquid
oxygen from the cryogenic container, warms it to near
ambient temperature, and meters the oxygen gas to the
patient. The water that is formed when the cold liquid is
converted to gas is collected in the condensate bottle.
An economizer regulator is used to reduce any excessive head pressure while oxygen is being provided to the
patient.
3. Shroud Assembly – The shroud assembly houses and
protects the breathing circuit and liquid level meter.
Labels listing safety information and patient operating
instructions are affixed to the side of the shroud.
4. Meter – This system uses a capacitance probe and an electronic level meter (LED) readout to measure and display
the product contents at the touch of the meter switch.
An optional roller base can be provided to help move
the Liberator.
* For Top Fill or Dual Models Only
Meter Switch
Liquid Level Meter
Shroud
Portable Release
Button*
Top Fill Fitting*
(QDV)
Flow Control Valve
(FCV)
Vent Valve
Economizer Regulator
Breathing/Warming
Coils
Side Fill Fitting
(QDV)
Cryogenic Container
(Dewar)
Condensate Bottle
Inner Vessel
Vacuum Insulation
IVSpecifications (Nominal Values)
Page 5
LIBERATOR 20 LIBERATOR 30 LIBERATOR 37 LIBERATOR 45 LIBERATOR 60
Capacity
Pounds (L02): 52 75 92 112 144
Liquid Liters: 21.6 31.2 38.3 46.6 60
Gaseous Liters: 17,780 25,650 31,460 38,300 49,200
Selectable Flow Rates
Liters per minute (0-6 LPM): Off, .25, .5, .75, 1, 1.5, 2, 2.5, 3, 4, 5, 6
Liters per minute (0-10 LPM): Off, .5, .75, 1, 1.5, 2, 3, 4, 5, 6, 8, 10
Liters per minute (0-15 LPM) Off, .5, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15
Flow Rate Accuracy ± .1 liter per minute or ±10% of flow setting, whichever is greater
Hours of Operation
@ 2 liters/minute: 148 213 262 319 410
Standard Fill Connections Side Side Side Side Side
Top Top Top Top Top
Operating Pressure
(Economizer Regulator) PSIG: 20 20 20 20 20
Primary Relief Valve Setting
PSIG: 23 23 23 23 23
Secondary Relief Valve Setting
PSIG: 30 30 30 30 30
Normal Evaporation Rate
Pounds per day: 1.5 1.5 1.5 1.5 1.6
Filling Time (Fast Fill Technique)
Minutes: Warm 2.5 3.0 3.5 4.0 5.5
Cold 1.5 2.0 2.5 3.0 4.0
Height
Inches: 24.5 29.5 32.75 37 39
Diameter
Inches: 14 14 14 14 16
Weight, Empty
Empty (Lbs.): 39 45 50 55 66
Full (Lbs.): 91 120 142 167 210
Fill Connector Type Side Mounted Rotary Coupling (Standard)
Top Mounted Push Coupling (Optional)
V Safety
Page 6
Oxygen, as it exists at standard atmospheric pressure and
temperature, is a colorless, odorless, and tasteless gas.
Oxygen constitutes 21% of the atmosphere, by volume. Aside
from its well-documented ability to sustain life, oxygen also
supports combustion, even though it is nonflammable. Many
substances which will burn in air, burn at a faster rate and at
a higher temperature in an oxygen enriched atmosphere. A
few materials that do not burn in air will burn as the oxygen
concentration increases. Some greases and many liquid solvents become extremely hazardous materials when placed in
an oxygen-enriched environment. In its liquid form, oxygen
is still odorless and tasteless, but is now pale blue in color.
At an operating pressure of 20 psig, the temperature of liquid oxygen is about -280° Fahrenheit. Skin exposed to such
a low temperature can become severely frostbitten.
These hazards require that certain safety precautions be taken
when working with or around gaseous and/or liquid oxygen:
1. Never permit combustible substances such as greases,
oils, solvents, or other compounds not oxygen compatible to contact any component of the unit exposed to
higher-than-atmospheric concentrations of gaseous or
liquid oxygen. This especially applies to tubing, fittings,
and valves.
2. Keep the oxygen equipment away from open flames or
electrical appliances such as heaters, stoves, toasters,
and other devices with heating elements.
3. Never permit smoking in an area where oxygen equipment is repaired, filled, or used.
4. Always wear goggles, a face shield, and insulated gloves
when working with or around liquid oxygen.
While CAIRE equipment is designed and built to the most
rigid standards, no piece of mechanical equipment can ever
be made 100% foolproof. Strict compliance with proper
safety practices is necessary when using a Liberator or
Stroller. We recommend that our distributors emphasize
safety and safe handling practices to their employees and
customers. While safety features have been designed into the
unit and safe operations are anticipated, it is necessary that all
distributor personnel carefully read and fully understand
WARNINGS, CAUTIONS, and NOTES throughout the man-
ual. Periodic review of this information is recommended.
WARNING: Excess accumulation of oxygen creates an oxygen-enriched atmosphere (defined by the Compressed Gas
Association as an oxygen concentration above 23%). In an
oxygen-enriched atmosphere, flammable items may burn vigorously and may explode. Certain items considered non-combustible in air may burn rapidly in such an environment. Keep
all organic materials and other flammable substances away
from possible contact with oxygen; particularly oil, grease,
kerosene, cloth, wood, paint, tar, coal dust, and dirt which
may contain oil or grease. DO NOT permit smoking or open
flame in any area where oxygen is stored, handled, or used.
Failure to comply with this warning may result in serious
personal injury.
WARNING: In the event a unit is dropped, tipped over, or
unreasonably abused, immediately, but cautiously, raise the
container to its normal vertical position. If substantial container damage has occurred, remove the liquid oxygen from
the vessel in a safe manner (RP 24). Purge the unit with an inert gas (nitrogen) and promptly return it to CAIRE for inspection. The container should be prominently marked
“CONTAINER DROPPED, INSPECT FOR DAMAGE.”
Failure to comply with these procedures may result in personal injury and can seriously damage the container.
WARNING: Personnel must remove liquid oxygen and depressurize the Liberator or Stroller before removing parts or
loosening fittings from a unit. Failure to do so may result in
personal injury because of the extreme cold of the liquid oxygen and the pressure in the vessel. External valves and fittings
can become extremely cold during liquid transfer.
WARNING: During transfer of liquid oxygen, components
will become extremely cold. Care should be used to avoid any
contact with these components, as serious burns may result.
WARNING: Keep filled unit upright at all times. Tip over
of filled unit may result in liquid oxygen leakage and/or oxygen enriched atmosphere.
WARNING: Only use replacement equipment which is compatible with liquid oxygen and has been cleaned for oxygen
use. Do not use regulators, fittings, hoses, etc. which have
been previously used in a non-oxygen service.
CAUTION: The Liberator should be moved by utilizing the
roller base or hand truck. The Liberator must be used, stored,
and transported in a vertical position. Do not lay, store, or
ship on its side.
IVTheory of Operation
Page 7
Filling
The Liberator is filled by connecting a pre-purged transfer
line with a fill adapter from a larger liquid oxygen source to
the Liberator female (side fill) or male (top fill) quick disconnect valve. The Liberator vent valve is opened. The pressure of the oxygen gas above the liquid in the source container forces liquid oxygen through the transfer line and into
the Liberator inner vessel.
There will be some oxygen vaporized during filling. This
gas is discharged through the vent valve. When the Liberator
is full, liquid oxygen is expelled. Closing the Liberator vent
valve and disconnecting the fill adapter from the Liberator
QDV terminates the fill process.
Saturation Pressure
The saturation point of a liquid is a steady-state condition
where the liquid has absorbed the maximum amount of heat
it can. Such a liquid is defined as being at its saturation pressure. For each saturation pressure, there is a corresponding
temperature; the higher the saturation pressure, the higher
the liquid temperature.
There are two conditions which can seriously affect the
overall efficiency and operation of the system:
1. Saturation pressure of the liquid oxygen in the fill source
is substantially higher than the Liberator operating pressure (oversaturated).
2. Saturation pressure of the liquid oxygen in the fill source
is substantially lower than the Liberator operating pressure (undersaturated).
For example, when a Liberator is filled from a liquid source
saturated at 100 psig, larger transfer losses will occur. This
is because the Liberator is designed to operate at 20 psig,
and the liquid it is filled with is saturated at a much higher
pressure and at its correspondingly higher temperature. It is
necessary for this liquid to desaturate to a lower pressure and
temperature before the relief valve will close and the
Liberator will operate properly.
In order to become saturated at 20 psig, the liquid oxygen
must give up enough heat for its temperature to be lowered
to that temperature corresponding to a pressure of 20 psig, as
shown in the graph. It accomplishes this by a vigorous boiling action. All of the gas generated by this boiling is vented
through the primary relief valve, and is lost.
If the saturation pressure of the liquid oxygen in the filling
vessel is lower than the normal operating pressure of the
Liberator, e.g., 10 psig, then the pressure building rod of
the Liberator must function to raise the system pressure to
the operating pressure of 20 psig. It may require as much as
several hours for the undersaturated liquid to become saturated at 20 psig. The time required for saturation to 20 psig
depends on the initial liquid saturation pressure.
FILLING
SATURATION CURVE
Vent Valve
Liquid
Gas
Fill Connection
(QDV)
Gas
-240
-250
-260
-270
TEMPERATURE (˚F )
2
-280
LIQUID O
-290
-300
0 255075100
(-278)
(-297)
SATURATION PRESSURE (PSIG)
(-251)
(-258)
VI Theory of Operation
Page 8
WARNING: Low oxygen flow rates to the patient may
result if the Liberator is filled with under-saturated liquid oxygen.
To minimize the effect of undersaturated liquid on the
Liberator, a fixed orifice has been installed in the outlet of
the vent valve. This orifice regulates the back pressure in the
unit during the fill process, resulting in more correct saturation pressures in the Liberator.
Operation
With liquid oxygen in the unit and the flow control valve and
vent valve closed, the pressure in the inner vessel will remain
near the primary relief valve setting of 23 psig.
In the Liberator, as in all vacuum-insulated cryogenic containers, some liquid (oxygen in this case) is always evaporating into a gas because no insulating system is perfect.
The rate of generation of this gas, with the flow control
valve closed, is called the normal evaporation rate (NER).
This gas is lost through the primary relief valve.
When the flow control valve is at any setting other than off,
and the economizer valve is open (pressure above 20 psig),
gaseous oxygen is forced from the head space in the inner
vessel, through the economizer valve, to the breathing coil.
This process conserves or “economizes” liquid oxygen by
withdrawing the head gas first, instead of allowing it to escape through the relief valve.
In the breathing coil, the cold gaseous oxygen is warmed to
near-ambient temperature while flowing to the flow control
valve, where it is metered and dispensed.
Whenever gas is removed from the space above the liquid
oxygen, the inner vessel internal pressure begins to drop
slightly. When the pressure drops to 20 psig, the economizer
valve closes, forcing liquid oxygen up the withdrawal tube
and through the warming coil where it becomes gas.
The gas then flows through the bypass tee to the breathing
coil, the flow control valve, and then the patient.
As the pressure in the container increases over 20 psig, the
economizer valve opens, and the cycle repeats, maintaining
constant oxygen flow, at the set flow rate, to the patient.
OPERATION PRESSURE
ABOVE 20 PSI
OPERATION PRESSURE
BELOW 20 PSI
Gas to Patient
Breathing
Coils
Warm-Up
Economizer
(Closed)
Coils
Breathing
Coils
Economizer
(Open)
Gas
Gas to Patient
VITheory of Operation
Page 9
Liquid Level Measurement
Liberators are equipped with a unique liquid level measurement system. This system measures the level of liquid oxygen
inside the unit with a capacitance probe and displays that liquid level on an LED bar graph meter called "Sur-Cal 3".
The liquid level probe consists of two concentric stainless
steel cylinders, which are inside the inner vessel. As the liquid oxygen level rises, the capacitance of this assembly goes
up. The meter measures this capacitance and displays it on
the LED bar graph.
Electrical connection between the Sur-Cal 3 meter and
the probe is made via a single conductor plug connector. The
male plug carries the coaxial cable from the meter. The female receptacle carries the same wire from the probe. A single ground wire is connected from the meter to a male spade
terminal on the corresponding meter ground wire. The SurCal 3is equipped with a short-circuit indicator which turns
all LED’s “off” when capacitance above approximately
375pF is reached.
The meter is powered by a nine volt battery. The meter has
a low battery (LOW BATT) indicator which signals the need
for battery replacement.
LIQUID LEVEL
METER
Probe Outer
Cylinder
Liquid Fill Tube
(Probe Inner Cylinder)
Plug Connector
Female Quick
Connect Valve
Meter Package
LOW
BATT.
+
+
Meter
Switch
Battery
3/4
1/4
+
+
9 Volt
F
1/2
E
_
_
VII Unpacking and Setup
Page 10
Unpacking
1. Always inspect carton for shipping damage. Report any
damage to freight company before signing bill of lading.
2. Check description on carton against your order.
3. Unpack unit, including condensation bottle, POI, and humidifier elbow kit.
4. Set aside several sets of packing materials in case a unit
must be returned to factory.
Setup
1. Install condensation bottle on bracket located below
shroud. Remove cap from bottle. Put condensation hose
inside bottle.
2. Install humidifier elbow following instructions in carton.
3. Visually inspect the Liberator for damage from improper
handling. Note any container dents, cracks in shroud,
missing or loose screws or other hardware, bent quick
disconnect valve or humidifier adapter.
4. Check for smooth operation of the flow control selector,
making sure that a positive detent is felt at all settings.
The flow control knob should be secure and properly
aligned.
5. Check the vent valve (Item 41) for smooth operation.
6. If possible, connect a Stroller to the Liberator to check
for smooth coupling, and to make sure the Stroller is in
proper alignment with the Liberator when mated.
7. Verify operation of the Sur-Cal 3 meter by depressing
the push button. LED segments will light, displaying the
level of liquid oxygen. If the unit is empty, only the bottom
segment should light. If it does not, or if other erroneous
indications are given, refer to the Troubleshooting/Repair
Section.
8. Check all labels for damage and wipe away any dust on
unit with a clean, dry, lint-free cloth.
9. If desired, flow control knob (Item 1) can be adjusted so
it will not exceed maximum prescribed flow rate.
a. Using hex key wrench, loosen setscrew if used (Item
17) in flow control knob and remove knob (Item 1).
b. Remove flow rate decal number disc (Item 2).
c. Remove two hex head screws (Item 4) from flow lock
plate (Item 3) and remove plate.
d. Remove locking pin (Item 65) from its storage position
on flow lock plate (Item 3) and place in underside of
hole corresponding to maximum allowable flow rate.
e. Replace flow lock plate (Item 3), number disc
(Item 2) and knob. Tighten screws (Item 4) to 4-6 inchpounds. Verify flow lock is at correct position.
ILLUSTRATION
FOR STEP 9
17
2
2
1/2
1/2
1
1
3/4
1/2
3
4
5
6
1/4
0
1
2
4
65
3
65
VIIIOperation
Page 11
Transport
CAUTION: Always ship, store, or transport a Liberator,
empty or full, in an upright position, properly secured to prevent damage.
Specifically designed roller bases are available for moving
the Liberators short distances on smooth surfaces. Hand
trucks are also available for moving the Liberators.
The Liberator 20, 30, 37, 45 and 60 may be moved about or
transported in a vehicle while full without damage. However,
the equipment should not be dropped or handled roughly, or
necktube damage may occur.
Filling
1. Fill Source
a. Fill source must contain a sufficient amount of liquid
oxygen to completely fill the Liberator (approximately
120% of Liberator volume).
b. The liquid oxygen in the fill source must be saturated
at 35-60 psig (50 psig is optimal).
c. The fill source must have correct fitting (5/8” * 45°
male flare) to connect to transfer line.
WARNING: Fill source must be in a well ventilated area
to prevent formation of oxygen enriched atmosphere.
2. Fill Procedure
a. Required Equipment:
♦ Fill source as outlined above
♦ Liquid oxygen transfer line
♦ Male transfer line adapter for side fill Liberators
♦ Female transfer line adapter for top fill Liberators
♦ Liberator vent valve wrench
♦ Eye protection
♦ Insulated gloves
b. If refilling partially filled Liberator, verify flow rates are
within tolerance specifications before filling.
c. Verify that liquid level meter is operating properly. The
LED display should indicate approximate level in unit.
The low battery LED should not be lit.
NOTE: If flow rates are out of specifications or liquid
level meter operates improperly, refer to Troubleshooting/
Repair section.
d. Verify that fill source has enough properly saturated
(35-60 psig) liquid oxygen to fill Liberator.
e. Connect transfer line to fill source. Connect proper
transfer line adapter to transfer line.
f. Fully open liquid valve on fill source.
WARNING: Wear insulated gloves and eye protection whenever working with liquid oxygen.
VIII Operation
Page 12
g. For male fill adapter:
Purge transfer line by placing adapter poppet (remove
protective cover) against side of unit and pressing in until poppet opens. Hold the poppet open for approximately five seconds, then release.
NOTE: Purge the transfer line any time fill source valve
has been closed.
h. Wipe reservoir fill connector with lint free rag if moist.
i. Weigh unit as required by local and federal standards.
j. Open reservoir vent valve.
k. Connect transfer line (liquid hose) to reservoir to begin
fill.
l. Connect a pressure gauge to oxygen outlet and open
the flow control valve to 2 lpm or greater.
m. While filling throttle the vent valve as required to keep
pressure at 20 psi nominal.
An alternate method to throttle the vent valve is to attach a flow meter to the oxygen outlet, set the flow control valve to 2 lpm, and then throttle the vent valve to
maintain a flow of 2 lpm. This is equivalent to using a
pressure gauge.
n. When liquid spurts from vent outlet, disconnect trans-
fer line.
o. Close reservoir vent valve immediately after removing
transfer line.
p. Disconnect pressure gauge (or flow meter) from oxygen
outlet.
CAUTION: Do not allow excessive venting of liquid
oxygen through the vent valve. Prolonged exposure may
freeze the valve in the open position.
q. Replace protective cover on adapter QDV and hang
adapter and transfer line using hook provided.
r. Verify that all flow rates are within tolerance specifi-
cations. Verify that liquid level meter indicates full.
NOTE: The liquid level indicating system is accurate
only after the vent valve is closed, and the oxygen has
been stabilized for five minutes.
IX
Routine Maintenance/Schedule A, Annual
There are two schedules for routine maintenance which the
home health care distributor may follow. These schedules
allow the distributor maximum flexibility while assuring that
equipment is operating properly.
Schedule A – Annual
A. Introduction
Routine maintenance is a series of steps used to assure that
equipment is functioning properly.
1. If a unit fails to pass a given test, one of two things may
be done.
a. Refer to Troubleshooting/Repair (Section X) of this
manual.
b. Return to CAIRE for repair.
2. Schedule – Maximum of one year between routine maintenance testing. Unit should be tested when a problem is
suspected.
B. Procedure
Follow the steps in order listed. If the unit fails any step,
refer to Troubleshooting/Repair (Section X) of this manual.
1. Visual Inspection:
a. Remove any LO2prior to maintenance (RP24).
b. Look for damaged or missing parts.
c. Verify that meter reads empty (one LED) and that the
low battery LED is not lit.
2. Component Test:
a. Remove shroud (RP2).
b. Pressurize to 25 psig (RP12) and check that PRV is
open.
c. Pressurize to 34 psig (RP12) and check that SRV is
open.
d. Recalibrate meter (RP5).
e. Test pressure retention (RP15).
f. Replace shroud (RP2).
3. Flow Test:
a. Fill with approximately 15 lbs. (2 LEDs) of properly
saturated LO
2
.
b.
Set FCV to maximum setting and run for one hour
minimum.
c. Check all flow settings to the following chart and
check pressure to be at least 18 psi.
4. Check Efficiency of Unit:
a. Set FCV to zero and allow bottle to warm up (10-15
minutes).
b. Inspect bottle for cold or sweaty condition and for ex-
cessive venting from relief valve (some venting is
normal).
c. If either condition is observed, conduct NER test
(RP32).
5. Prepare for Use:
a. Empty contents (RP24).
b. Allow unit to sit until warm (2-4 hours).
c. Clean outside of unit with household glass cleaner
and lint free cloth (do not get in any valves).
Page 13
Reservoir Flow Test
FCV Setting LPM
OFF -0-
0.25 0.15 to 0.35
0.50 0.40 to 0.60
0.75 0.65 to 0.85
1.00 0.90 to 1.10
1.50 1.35 to 1.65
2.00 1.80 to 2.20
2.50 2.25 to 2.75
3.00 2.70 to 3.30
4.00 3.60 to 4.40
5.00 4.50 to 5.50
6.00 5.40 to 6.60
8.00 7.20 to 8.80
10.00 9.00 to 11.00
12.00 10.80 to 13.20
15.00 13.50 to 16.50
IX
Routine Maintenance/Schedule B, Continuous
Page 14
Schedule B – Continuous
A. Introduction
Continuous maintenance is a set of test or inspections done
consistently to assure equipment is functioning properly. It
can be done with equipment in service, by drivers or other personnel.
1. If a unit fails to pass a given test, it should be taken out of
service and sent to the Repair Center/Department for further inspection.
2. Schedule – Checks are made when the driver sees patient
and when moving equipment between patients.
B. Procedure
These inspections/ tests are done by driver as part of the
Standard Fill Procedure every time the reservoir is filled.
1. Visual Inspection:
a. Broken shroud.
b. Cold sweaty bottle (vacuum problem).
c. QDV not deformed.
2. Check prescription flow rate(s). Erie liter meter (± 0.25
lpm) can be used.
3. Check meter. Push meter button before fill and verify that
battery is not low and that meter is within one LED of
table below. After filling, verify that meter reads full.
These inspections/tests are done between patients.
1. Visual Inspection:
a. Broken shroud/flow control knob.
b. Cold sweaty bottle or excessive venting from relief
valve (vacuum problem). Some venting from relief
valve is normal.
c. QDV not deformed.
d. Inspect under shroud (without removal) for any visible
dirt or contaminants.
e. Inspect drain tube for visible dirt. Clean with a 6” cot-
ton swab to remove dirt.
2. Verify that meter battery is not low and meter is within one
LED of table. If unit is empty, verify meter reads empty,
then fill with approximately 15 pounds of liquid oxygen
and verity with chart.
3. Set FCV to maximum flow rate for one hour. Check all
flow settings to the following chart and check pressure to
be at least 18 psi.
4. If unit fails one of the above test, return to Repair
Center/Department or CAIRE. if units passes all tests,
clean outside of unit with household glass cleaner and lint
free cloth (do not get in any valves).
Contents vs. Meter Reading
Pounds of Oxygen
LED Lib 20 Lib 30 Lib 37 Lib 45 Lib 60
1 0.0-9.8 0.0-14.6 0.0-17.8 0.0-21.2 0.0-21.6
2 9.9-14.7 14.7-21.9 17.9-26.7 21.3-31.8 21.7-33.4
3 14.8-19.6 22.0-29.2 26.8-35.6 31.9-42.4 33.5-53.1
4 19.7-24.5 29.3-36.5 35.7-44.5 42.5-53.0 53.2-71.9
5 24.6-29.4 36.6-43.8 44.6-53.4 53.1-63.6 72.0-86.3
6 29.5-34.3 43.9-51.1 53.5-62.3 63.7-74.2 86.4-100.5
7 34.4-39.2 51.2-58.4 62.4-71.2 74.3-84.8 100.6-121.9
8 39.3-44.1 58.5-65.7 71.3-80.1 84.9-95.4 122.0-130.9
9 Above 44.1 Above 65.8 Above 80.2 Above 95.5 Above 131
Reservoir Flow Test
FCV Setting LPM
OFF -0-
0.25 0.15 to 0.35
0.50 0.40 to 0.60
0.75 0.65 to 0.85
1.00 0.90 to 1.10
1.50 1.35 to 1.65
2.00 1.80 to 2.20
2.50 2.25 to 2.75
3.00 2.70 to 3.30
4.00 3.60 to 4.40
5.00 4.50 to 5.50
6.00 5.40 to 6.60
8.00 7.20 to 8.80
10.00 9.00 to 11.00
12.00 10.80 to 13.20
15.00 13.50 to 16.50
Page 15
XTroubleshooting (Table of Contents)
Introduction ………………………………………………………15
Troubleshooting Charts…………………………………………16-17
Procedures
RP1 General ………………………………………………18
RP2 Shroud Assembly R/R ………………………………19
RP3 Condensation Bottle Bracket R/R ……………………19
RP4 Battery R/R …………………………………………19
RP5A Sur-Cal 3 Meter Calibration ……………………19-21
RP5B Sur-Cal 3.1™ Meter Calibration ……………………21
RP6 Manifold Capacitance Test …………………………22
RP7 Manifold Assembly R/R …………………………22-23
RP8 Resolder Feed-thru Wire ……………………………23
RP9 Manifold Harness Assembly R/R ……………………23
RP10 Clean/Dry Probe and Dewar …………………………23
RP11 Sur-Cal 3TMMeter R/R ………………………………24
RP12 Relief Valve Test ……………………………………24
RP13 Primary Relief Valve (PRV) R/R ……………………24
RP14 Secondary Relief Valve (SRV) R/R …………………25
RP15 Pressure Retention Test ………………………………25
RP16 Plumbing Leak Test …………………………………25
RP17 Warming and Breathing Coil Assembly R/R ………26
RP18 Vent Valve R/R ………………………………………26
RP19 Fill ……………………………………………………26
RP20 QDV Lip Seal R/R (Side Fill Only) ………………26-27
RP21 QDV Poppet Assembly R/R (Side Fill Only) ………27
RP22 QDV Assembly R/R (Top Fill and Dual Only) ………27
RP23 Stroller Pop-Off Assembly (Top Fill and Dual Only)…27
RP24 Empty Unit……………………………………………28
RP25 Warm Unit ………………………………………28-29
RP26 Flow Rate Test ………………………………………29
RP27 Operating Pressure Test………………………………29
RP28 Flow Meter Verification………………………………29
RP29 Economizer Regulator R/R …………………………30
RP30 Flow Control Valve (FCV) R/R ……………………30
RP31 Dewar R/R ………………………………………30-31
RP32 Normal Evaporation Rate (NER) Test ………………31
RP33 Cleaning Unit…………………………………………31
Tools ………………………………………………………………32
Fixtures/Equipment ………………………………………………32
Supplies ……………………………………………………………32
Introduction
1. These procedures are designed to be performed only by qualified personnel with proper equipment.
2. Any failure during routine maintenance checks will refer you to this section. See troubleshooting
chart for appropriate procedure.
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