DeVILBISS MC44-90 User manual

DeVILBISS

OXYGEN

CONCENTRATOR

DeVO/MC44-90

|

220

VOLT

50

Hz

SERVICE

-

We

add

1-800

Somerset,

Canada € France € Japan e U.

433-1331 e 814

PA

MANUAL

life

to

every

U.S.A.

breath.
443-4881

15501-0635

Kingdom e W.

Germany

SB-MC44

-220M

TABLE

OF

CONTENTS

Section

Section 2 -

Section 3 -Installation

Section 4 -

Section 5 -

Section 6 -
Section 7 -

1-General

A.

B.

C.

D.

Theory

A.

B.
Maintenance

A.

B.

C.
Alarm

A.

B.

Information

Initial

Inspection

Maintaining

Warnings/Hazards

General

of

Operation

Installation

Operation

Testing

Routine
Periodic

System

Patient

Microcomputer

Troubleshooting

Service
A.

Instructions

Proper

Description

and

and Calibration

Maintenance

Maintenance

Alert

Repair

B.CabinetCovers.......................................

<.

Flow

Meter

D.

Pressure

E.

ManifoldlheckValves

F.

Molecular

G.

Four-Way

H.

Purge

|.

Compressor

J.

Pilot

К.

Manifold

L.

CapacitOr

M.CoolingFan..........................................

М.

Microcomputer

O.

Normal

Regulator

Valve

Pressure

Cycling

................................,......

.......................................

the

DeVO/MC44

............................

......................................

of

the

DeVO/MC44

...................

...............,.........,,......,.....

Operating

............................................

...............,.............................

Procedures

Procedures

.................................:.

......................

.................................

................................... 5 ㆍ

...................................

.........................

System

Control

Guide

....................................

Board

...........................

..................................

00

eee

............................,.........

Procedures

..........................................

.............................

...................................

................................

Sieve

Valve

Bed

Assemblies

......................................

........................

..........................................

..........................................

System

Assembly

een

Control

Sequence

..................................

...................................

Board

of

.........................

DeVO/MC44

...............

1

1

1
1

1
2
3

3

3

B

5

6
8

8

8

10
13

13
13

14

14
14
15

16

17

19

21

21

22
23

23
24

10/87

Section 8 -
Pneumatic

Electrical
Упк
Dealer

Block

бресИсаНоп$

Warranty

Parts

List

Diagram

Diagram

and

Wlustrations

................................

......................

for

Model

MC44

...............

0...

eee

............................

eee

K 0

K

25
38
39
40
41

SECTION

1

GENERAL

A.

Initial

Inspection

An

Initial

inspection

DeVO/MC44

After

unpacking

any

external
during
the

DeVilbiss

dealer
The

for

concentrator
operated
Section 3 of
operate
contact
or

your

B.

Maintaining

The

DeVO/MC44
cording
the

manual.

is

required

qualified

maintain

C.

Warnings/Hazards

Oxygen

When

Person

Near

Hot,

Electrical
Removed

as

soon

damage

shipment.

international

specific

for

at

this

properly

the

DeVilbiss

dealer.

the

to

the

guidelines

Whenever

it

should

service

the

unit

Promotes

Using

The

Receiving

Sparking,

Shock

Hazard:

By A Qualified

INFORMATION

should

the

concentrator,

!f

damage

instructions.

should

least 30

manual.

or

DeVO/MC44

should

personnel.

may

Warning

Rapid

DeVO/MC44

Oxygen

Or

Warning

be

performed

as

possible

that

may

have

has

occurred,

Department

then

be

turned

minutes

internal

If

the
damage

as

International

be

routinely

set

forth

routine

be

servicing

performed

Failure

void

the

warranty.

Burning.

Therapy.

Burning

The
DeVilbiss

Do

Or

When

Objects.

Cabinet

Dealer.

on

after

receipt.

examine

occurred

contact

or

on

outlined

unit

fails

is

found

Department

serviced

in

Section 4 of

or

repair

by

to

properly

Not

Smoke

Near

Do

Not

May

Only

it

your

only

the

for

and

in

to

ac-

A

Use

Be

directs
ing
a
very
tively
concentration

Because
beds,
depressurize
allows
of

the

air

into

molecular

synthetically

porous,

sieve

produced

and

adsorbing

of

the

DeVO/MC44

it

is

able

the

the

unit

adsorbed

nitrogen

to

producing a high

process
approximately
altitude
assures

is

alternated

and

oxygen

the

patient

every

oxygen.
The

oxygen

leaving

through a check

From

here

it

passes

flow

meter,

filter

before
meter
and

adjusted

patient's

Тре

DeVO/MC44

visible
diagnostic
personnel.
power
or

pneumatic

and a second

exiting

allows

the

physician.

patient

service

This

failure,

component

to

alert

alert

low

one

of

two

cylinders

material.

This

inorganic

has

the

unique

nitrogen.

oxygen

to

other

cleanse

This

for

the

has

two

pressurize

bed

at

the

the

depressurized

while

the

pressurized

concentration

between

16

seconds

output

flow

of a continuous

the

sieve

valve

to

an

accumulator

through a pressure

high

efficiency

at

the

outlet

oxygen

the

incorporates

system

system

flow

level

system

to

system

pressure,

prescribed

as

be

will

failure.

contain-

sieve

material

silicate.

quality

of

is

It

is

selec-
produces a high
patient.

molecular

one

same

bed

time.

sieve

and

This

bed

bed

is

of

oxygen.

the

depending

rate.

The

beds

is

two

beds

cycling

supply

directed

This

on

of

tank.

regulator,

bacteria

fitting.

to

an

well
used

activate

The

be

controlled

audible

as a self-

by

and

electrical

flow

by

the

and

service

due

to

D.

General

The

DeVilbiss

is

designed

oxygen

in

the

providing

2,92%
4

liters
minute.
similar

Room

oxygen

DeVO/MC44

Description

to

for

the

home

95% + 3%

+

3%

at 3 liters

per

minute,

This

is

to

filtration.

air,

which

and

78%

by a compressor.

DeVO/MC44

through a gross
a

high

efficiency

the

compressor.

will

produce

flow

from a cooling

Leaving
HEPA

filter

clean

the

compressor,

and a four-way

of

deliver

patient

or

high

requiring

institution.

oxygen

per

and

70% + 3%

accomplished

contains

nitrogen,

particle

filter, a felt

bacteria

The

“WOB’L”

oil

free

fan.

the

the

DeVO/MC44

Oxygen

Concentrator

concentrations

oxygen

It

is

capable

concentration

minute,

approximately

80% + 3%

at S liters

by

using a process

is

drawn

The

pre-filter,

filter

before

type

compressor

air

and

is

cooled

air

passes

directional

therapy

at

21%

into

air

passes

entering

by

through
valve

of

of

1-

at

per

the

and

air

a

that

10/87

SECTION

THEORY

The
similar

2

microcomputer

to

the

DeVO/44

OF

OPERATION

controlled

and

MC29

in
uses a pressure-depressurization
produces
efficient
are

DeVO/44

Observation
cycle

in

conjunction
the
trouble-shooting

observed
points

Variations
can
de-activating

complete

This

dependent
cycle
monitored
control board).
a

pressure

ducer

1/16”

oxygen

A

cycle

pressure

25.5

the

received
and
air
way

high

manner.

also

pneumatically

and

is

one

MC

board,

by

located

in

be

observed

cycle

is

an

approximate

and

the

transducer

is

connected

(1.6

mm)

pressure

change

in

the

PSI

(176

four-way

by

purge.

from

the

and

purge

concentrations

The

four-way

of

and

operated

MC29.

of

the

pressure-depressurization

way

to

isolate

with

the

it

can

the

installing a set

on

the

the

pressure-depressurization

in

relation

of

the

four-way

takes

on

the

liter

alarm

by

the

MC

This

is

to

diameter

in

the

takes

accumulator

KPa).

At

and

purge

pilot

valves

These

pilot

pilot

accumulator

so

they

problems.

indicator

be

of

significant

unit.

Cycle

of

gauges

manifold.

to

the

and

approximately

time

because

flow

and

system

are

board

accomplished

on

the

MC

the

accumulator

hose.

It

accumulator.

place

tank

this

point a signal

valves.

located

valves

allow

to

can

be

activated.

oxygen

lights

operation

(microcomputer

board.

constantly

only

is

on

DeVO/MC44

many

ways.

system

which

in a very

purge

similar

When

valves

to

used

located

help

when

can

to

the

cycle

activating

purge

valves.

22

seconds.

all

cycles

altitude.

controlled

by

the

use

The

trans-

tank

senses

when

approximately

is

sent

This

signal

the

four-way

compressed

enter

the

four-

is
It

the

on

be

test

and

A

are
The
and

of

by

a

the

to

is

which
the
the
purge

and

the

is
bed.
four-way

pressed
bottom.

allows

bed

from

bed

being

The

valve.

air

is

At

the
high

the

to

start

exhausted

air

and

When

directed

top.

concentrations.
air

in

the

previously

This

exhaust

can

closes.
At

the

beginning

needie

on

the
approximately
the

purge
needle
rise

until
maximum
four-way
drop

KPa).

and

bed.

hesitate

steadily

KPa).
continuous
to

depressurized
orifice.
reached,
anew

opening.

will

hesitate

maximum

accumulator

shifts

in

pressure

This

drop

releasing

When

the

slightly

and

This

low

flow

When

the

cycle

begins.

some

level

maximum

four-way

being

exhausted

out

of

the

into

same

time,

purity

When

This

its

cycle

oxygen
additional

the

pressurized

be

heard

of

the

gauge

15

PSI

will

(103

When

slightly

pressure

and

the

to

approximately

is

caused

of

purge

and

off

at

pressure

of

oxygen

bed

and

through

the

four-way

the

the

the

passes

exhaust

other

purge
to

enter

bottom

through

port

shifts,

bed

from

valve

the

pressure

at

higher

purge

each

pressurization

suddenly

KPa).

the

and

pressure

gauge

by

the

oxygen

closes,

then

pressures

valve

bed

is

exhausted.

time

increase

This

is

purge

then

continue

is

reached.

is

reached,

will

show a sudden

15

the

purge

to

the

needle

continue

closes,

the

cycle

caused

closes,

PSI
opening

the

to

approximately 2 PSI

reading

through

accumulator

from

purge

is

caused

the

pressurized

the

pressure

valves

manifold

shift

of

of

the

com-

the

opens

same

allows

and

the

purge

the

to
by

the

to

When

the

(103

other

will

drop

(13.8

by

the

is

and

The

four-way
position
PSI

tank.

this

activated
that

until

(175.8

This

takes

pressure

causing

when

KPa)

activated,
pressurization
activated,
Although
time
activated

It

is

during

the

pressurized

bed

that

During
from
into
located
purge

10/87

the

the

as

the

four-way,

position

this

is

just

pressurization a small

the

pressurized

the

depressurized

in

the

the

nitrogen

valve

will

the

right

of

oxygen

approximately

is

reached
the

left

of

the

right

left

bed

purge

valve

for

approximately

time

that

bed

is

allowed

beginning

bed

manifold.

from

remain

sieve

bed

the

is

is

it

high

in

bed

in

the

11

the

four-way

to

pressurize.

four-way

sieve

bed.

being

activated

only

remains

purity

to

its

pressurization

amount

is

constantly

bed

through

This

oxygen

the

depressurized

the

activated

builds

up

accumulator

seconds.

When

is

allows

When

pressurized.

at

the

same

in

1.0

seconds.

oxygen

flow

into

cycle.

of

oxygen

flowing

the

orifice

flow

helps

25.5

de-

Note

de-

this

from

the

bed

SECTION

3

INSTALLATION

A.

Installation

1.

B.

Operation

1.

Position

control
lt
cycle,
a

minimum
of
trator

radiators,

NOTE:

imprinted

2)

read:

WARNING:

burning.

DeVO/MC44
receiving
near

Electrical
cabinet.
removed

With

position,
volt,

handling a minimum

Push

"ON"

illuminate,
cated

of

switch

is
guide

When
audible
the
erable

may
the
surize.
continues
shooting

The

"Service

illuminate

remain
system

With
turn

(S

the

panel

must

be

electrical

other

appliances.

should

Always

located

hot,

the

50

cycle,

the

position.

in

the

the

unit.

still

unbroken,

for

the

alarm

unit

length

sound

accumulator

If

visible

on

is

the

the

knob

Fig.

2)

AND

concentrator

is

convenient

accessible

outlet

of 7 amps

not

be

heaters,

or

observe

on

the

instruction

on

the

front

Oxygen

Do

not

smoke

or

when

oxygen

sparking,

shock

The

therapy.
or

hazard:

cabinet

by a qualified

power

plug

the

switch

line

electrical

On/Off

check

power

switch

If

the

the

connector

Replace

fails

to

illuminate,

refer

to

specific

power

has

instructions.

switch

will

sound

not

been

of

time,

for

an

extended

has

the

alarm

to

sound

guide

for

specific

alarm

on

the

Required”

when

the

until

pressure

approximately 9 PSI.

DeVO/MC44

(6

Fig.

until

the

such

to

to a 240
capable
that

is

independent

The

oxygen

located

hot

air

registers.

the

label

of

the

promotes

when

near a person

Do

burning

Do

not

may

DeVilbiss

in

cord

outlet

of 7 amps.

(1

Fig.

switch

fuse

(1

if

necessary.

and

the

troubleshooting

is

turned

momentarily.

used

for a consid-

the

audible

had

time

does

not

refer

to

the

instructions.

control

(2

Fig.

unit

is

turned

operating,

2)

on

the

ball

in

the

OPERATING

that

the

the

patient.

volt,

50

of

handling

concen-

adjacent

warnings

unit.

using

objects.

only

the

into a 240

capable

2)

does

Fig.

on

period

sound

panel

2).

within

flow

to

(4

Fig.

They

rapid

the

not

use

remove

be

dealer.

“OFF”

of

to

the

not

4)

lo-

the

back

If

the

the

fuse

on,

the

alarm

until

to

pres-

or

trouble-

says

It

will

on

and

the

slowly

meter

meter

If

is

PROCEDURES

centered

-

the

Flow

LPM.
positioned
enclosed

properly
tions

Therefore,

retained

log

Important:

pletely

tubing

because
When

trator

extended

up

oxygen

flow

period

and

If a humidifier

the

delivery

the

not

If a humidifier
a

bubble-type

humidifier

the

to

the

NOTE:
DeVO/MC44
pressure

“Set-Type”

properly
bubble-type

Included

plastic

piece
Fig.

8

inches

fitting
(203
fitting
humidifier
tightened
fitting.
oxygen
mm)

may

from

on

the

prescribed

meter

accuracy

Because

as
with
the

may

not

this

or

the

book

for

future

If

off

it

alarm”

of

the

the

DeVO/MC44

is

turned

period

to

30

minutes

concentration

rate

may

of

time

readjusted

physician,

tubing

oxygen

exceed

elastic

outlet

50

stand

strap

stand.

For

optimum

has a pre-set

of

8.5

humidifiers

at

humidifiers

with

fittings

of

tubing.

8)

for

all

humidifiers

(203

(3

Fig.

mm)

and

by

turning

counterclockwise

securely

Connect

outlet

piece

of

have

to

kinking.

line

corresponding

flow

rate.

will

of

this,

the
shown
every

correct

unit.

be

attained

green

on

oxygen

information

reference.

flow

meter

may

activate

and

turn

severely

on

(or

if

of

time),

for

the

drift

slightly

and

should

if

necessary.

has

not

been

the

5/32”

can

be

attached

fitting.

feet

(15

m).

has

been

humidifier

(4

Fig.

(5

Fig.

performance,

PSI

(58.6

this

low

the

DeVO/MC44

and a 3-inch

Use

the

mm)

tall

8)

for

humidifiers 8 inches

taller.

Attach

the

on

the

humidifier

fitting
tubing
be

with
(4

shortened

vary

slightly

ball

should

the

green

If

ball

is
concentra-
at 5 LPM.

card

should

recorded

is

turned

the

“crimped

the

unit

restricted

flow.

oxygen

not

in

use

it

may

flow

rate

to

stabilize.

during

be

monitored

prescribed

(4

mm)

directly

Tubing

prescribed,

(6

Fig.

3)

3)

securing

3)

that

is

attached

nominal

KPa),

therefore,

will

not

function

pressure.

should

straight

that

and

be

(76.2

are

the

fitting

less

the

wing

nut

until

the

humidifier

the

3-inch

Fig.

8).

The

to

prevent

with

at

5

be

card

not

set

be

in

a

com-

off

concen-

for

an

require

and
The
this

by

1.D.

to

should

place

on the

it

with

the

output

Only

used.

are

mm)

(2

than

elbow

proper
on

the

it is

to

the

(76.2

tubing

2

it

10/87

SECTION

3

INSTALLATION

Attach

I.D.

the

cannula

not

Condensation

occur

the

oxygen

humidifier

or a suitable

exceed

in

longer

desired

delivery

50

feet

from

lengths

length

tubing

and

attach

mask.

(15 m).

the

AND

of

5/32”

(7

Fig.

either

Tubing

humidifier

of

tubing

OPERATING

(4

mm)

3)

to

a

should

may

or

with

PROCEDURES

tubing

reduced
ifier
end
outlet
plastic

The

may

laying

by

stand.

of

the

delivery

fitting

fitting

DeVO/MC44

now

be

on a cold

using

To

use

and

on

the

used.

floor.

the

removable

the

stand,

tubing

the

humidifier.

oxygen

to

other

This

can

humid-

attach

the

end

concentrator

one

oxygen

to

the

be

10/87

SECTION

4

MAINTENANCE

Every

"burned-in“
of
assure
ous
formed
dealer.
are

A.

DeVO/MC44

the

product

continued

maintenance

on a regular

The

provided
Testing

1.

Turn
tion
trol

rate
minute.

When

used
may
gen
rate
of
gradually
specific

When
stabilized,
attached

Fig.
various
should

oxygen

under

the

decreases,

oxygen
The

outlet
the

OXYGEN
CONCEN-
TRATION
(Percent

+3)

at

the

factory

specifications

trouble-free

procedures

following

as a guideline.

and

Calibration

the

power

and

slowly

knob

(6

Fig.

is

variable

the

unit

for

an

require

concentration

may

drift

time

and

the

increase

flow

the

oxygen

an

to

2)

to

test

flow

be

calibrated

percentage

B-6).

As

percent

range

graph

100

90

80

70

Oxygen

of

though

delivered

of

for

various

below

ο

FLOW

Production

is

thoroughly

to

basis

by a qualified

maintenance

switch

turn

2)

and

from 0 to 5 liters

is

first

extended
up

to

30

to

slightly

oxygen

to a steady

rate.

oxygen

the

oxygen

oxygen

rate

settings.

the

flow

oxygen

the

per

oxygen

flow

for

the

1

2

(Liters

PROCEDURES

tested

make

sure

are

being

performance

should

instructions

to

the

“ON”

the

flow

meter

note

that

turned

minutes

stabilize.

concentration

analyzer

prior

reading

in

Per

Vs.

on

period

during

concentration

concentrations

actual

minute

delivered

3

of

for

outlet

The
to

rate

is

the

delivered

rates

is

MC44.

4

Minute)

Flow

Rate

this

volume

and

that

met.

To

vari-

be

per-

DeVilbiss

posi-

con-

the

flow

per

(or

if

not

time)

the

oxy-

The

flow

period

will

value

at

has

should

fitting

analyzer

taking

(See

note

increased,

gas

is

greater.

at

the

shown

MC44
(240

Volt)

5

all

it

a

be

(7

at

an

of

in

B.

Routine

1.

Maintenance

Humidifiers - The

should

mended

be
thoroughly,
overfill.
cannula
according
dations.

Gross

filter

cleaned

To

A.

B.

C.

D.

NOTE:
monitored
with
matter
DeVO/MC44

filter

pre-filter

performance.
Felt

should

month

To

A.

B.

C.

D.

be

by

washed

or

Particle

(6

Fig.

weekly.

remove

Turn

turn

and

(See

Fig.

Wash

water
from

the

Use a lint-free

dry

filter.

dry

before

Filter

vacuuming.

The

abnormal

in

will

Pre-Filter - The

be

under

replace

Rotate

counterclockwise

the

intake

Remove
housing
used

filter

Insert a new

the

housing

the

housing.

Place

teria
snug.

humidifier

cleaned

the

manufacturer.

in

warm

and

refilled.

The

tubing

mask

should

to

manufacturer's

Filter - The

4)

should

and

clean:

the

knob

counterclockwise

remove

5).

the

assembly

and

rinse.

filter.

cloth

Be

sure

replacing.

may

also

gross

particle

more

closely

amounts

the

air.

without

prematurely

and

cause a decrease

felt

changed

the

the

the

and

the

filter

approximately

normal

pre-filter:

filter

bacteria

cap

(1

pull

pad

(2

felt

and

filter

housing

and

daily

turn

or

soapy

Fig.

water,

Be

careful

and

prescribed

also

gross

be

removed

the

entire

in

warm

Shake

Operation

conditions.

out

replace

excess

or

paper

filter

is

be

cleaned

filter

in

environments

of

the

gross

occlude

pre-filter

housing

to

remove

filter

(5

Fig.

7)

on

and

7).

pre-filter

on

clockwise

(6

Fig.

3)

as

recom-

It

should

rinsed

not

to

be

cleaned

recommen-

particle

and

1/4

assembly

soapy

water

towel

to

completely

by

should

particulate

(3

Fig.

discard

the

be

of

the

particle

the

felt

in

unit

(2

Fig.

once

Fig.

it

from

7).

the

filter

the

pad

into

cap

on

the

bac-

until

7)

7)

a

10/87

SECTION

4

MAINTENANCE

С.

Intake

filter
same

and

mately
To

A.

B.

D.

Audible

system should
maintenance

checked

A.

B.

NOTE:
purchased
batteries

02

tions

accordance

procedures

NOTE:
the
calibrated

source.

changes

midity

tration
Therefore,

calibrated
the

Periodic

Bacteria

(5

time

changed

every

replace

Pull

rubber
Remove
Place

new

The
be

inserted

To

test

remove

volt

switch

alarm

replace
located
divider.

Plug
and

“ON”
momentarily.
or

sounds

battery.

Concentrations - Oxygen

should

Before

oxygen

reading

concentrator

Maintenance

Filter - The

Fig.

6)

should

the

felt

when

six

the

intake

the

bacteria

grommet

the

the

feit

bacteria

complete

into

be

pre-filter

months).

bacteria

(See

felt

pre-filter

pre-filter

filter.

filter

the

Alarm - Testing

be

included

program.

on a monthly

the

the

AC

outlet

to

the

is

not

the 9 volt

on

the

the

unit

turn

the

position.

weak

basis.

audible

line

cord

and

“ON”

heard

front

into a 220

power

The

If

the

replace

Replacement

locally

or

(Section

and

equivalent.

be

checked

with

the

4,

A).

checking

analyzer

should

using a 100%

It

should

in

temperature,

may

affect

the

in

similar

also

the

as

shown

analyzer

conditions

is

located.

PROCEDURES

intake

inspected

needed

filter

Fig.

assembly

rubber

the

alarm

turn

position.

or

battery

of

switch

alarm

alarm

batteries

should

established

concentrations,

be
altitude,

oxygen

by

bacteria

at

the

is

inspected

(approxi-

filter:

out

of

the

6).
assembly.

assembly

can

on

then

grommet.

audible

alarm

in a routine

!t

should

system,

from

the

220

the

power

if

sounds

volt

(20

the

will

is

not

weak,

Fig.

vertical

AC

outlet

to

sound

heard

the

the 9 voit

can

be

alkaline

concentra-

monthly

test

be

properly

pure

oxygen

noted

that

or

concen-

the

analyzer.

should

to

where

the

hu-

a

be

11)

be

in

be

Final

Bacteria

filter

(3

Fig.

needed

normal

To

A.

C.

D.

E.

(approximately

conditions).

replace

Loosen

top

Swing

the

and

the

Remove
each

end

Install

with

new

hose

Replace
fasteners.

Compressor

filter

(12

Fig.

before
To
A.

25,000

replace

Refer

to

compressor

cabinet

be

completely

B.

Cut

plastic

filter

in

C.

Loosen
rubber

D.

Install

new
directional
and

secure

NOTE:

directly

screws
unit
can

E.

F.

Holes

behind

and

must

be

inserted

Attach
of

filter

Replace

with

cabinet

Compressor

necessary
10,000

See

NOTE:

hour

Service

All

maintenance

listing

the

maintenance

shown

on

the

Filter - The

12)

should

final

bacteria

the

cabinet

sides

of

the

front

cover

hose

clamp

of

filter

and

bacteria

clamps.

cover

and

Filter - The

14)

should

hours

of

Service

covers.

place.

hose

hose

Instruction B to

The

removed.

cable

tie

clamps

from

HEPA

arrow

with

plastic

for

cable

left

brackets

be

removed

into

holes.

black

rubber

and

secure

cabinet

fasteners.

-

Inspect

the

internal

intervals

Instruction

routine

should

date

and

schedule

following

final

be

changed

once a year

filter:

fasteners

unit.

to

the

and

discard

filter

secure

with

compressor

be

changed

unit

operation.

filter:

back

cover

that

holds

and

remove

both

ends

filter

with

pointing

cable

tie

are

sieve

bed.

that

secure

so

that

hoses

to

with

hose

covers

and

and

components

of

unit

|.

and

be

recorded

hour

readings

like

page.

bacteria

as

under

on

the

right.

hose

from

filter.

and

secure

cabinet

HEPA

at

or

open

should

HEPA

black

of

filter.

air

flow

downward

tie.

located

Thumb

beds

to

cable

tie

each

end

clamps.

secure

change

if

at

operation.

periodic

by

in

the

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10/87

SECTION

5

ALARM

Most

problems

MC44

This

audible

there

problems

the

personnel
The
the

A.

are

indicated

system

is

alarms

comprised

which

is a malfunction.

are

indicated

MC

board.

These

troubleshoot

alarm

MC
Patient

1.

system

board.

Alert

Visible
located

Alarm

on
Required”
illuminated

such

as

low
compressor

flow

will
illuminate. A more
of

the

type

observing

the

MC

board.

NOTE:
come
turned

period,

The

on

on.

or

operating,

2.

guide
Audible

will

in

Section

Alarm

sound
pressure,
component
alarm

system.

the

unit

accumulator

powered

is

The

alarm

of

the

MC

alarm

control

B.

Microcomputer

The
board
cover
monitoring
as

well

transducer
When

indicates a malfunction,

be

activated

transmits

panel

microcomputer

(7

Fig.

of

the

and

as

the

(13

the

pressure

component
activated

if

the

SYSTEM

encountered

by

the

alert

by

are

problems

is

monitored

System

System - The

the

control

(2

Fig.

it

indicates a unit

pressure,

failure. A severe

also

of

problem

the

alarm

“Service

momentarily

If it

stays

comes

refer

to

6.

System - The

when

power,

failure

This

is

turned

has

had

by a 9

itself

is

board.

(3

Fig.

Control

12)

is

located

unit.

controlling

alarms

Fig.

12).
sensed

whether
failure.

system

with

patient

of

both

the

Further

alarm

lights

designed

and

panel

2).

When

valve,

cause

definitive

can

indicator

Required”

when

on

for

on

while

the

troubleshooting

there

is a low

valve,

that

alarm

will

time

volt

alkaline

located

When

the

sound

2).

Board

contro!

on

It is

responsible

the

by

using a pressure

by

the

alarm

it

is

for a pressure

Alarms

fails

to

within

this

on until

to

on

the

DeVO/

alert

system.

visible

patient

when

isolation

located

to

help

service

the

activated

visible

says

this

alarm

“Service

panel

malfunction

sieve

bed,

restriction

panel

description

be

found

lights

panel

the

unit

an

extended

the

unit

audible

or

or

other

activates

sound

pressurize.

battery.

the

backside

activated

through

board

the

this

will

operate

or

inside

entire

system

transducer

system

also

within

and

of

on

unit.

by

is

or
of

to

by

on

will

is

is

alarm

high

the

when

the

It

the

the

MC

front

for

will

or

be

the

pre-set

times.

The

DeVO/MC44
system
disconnected
the

patient
malfunction
is

still

malfunctions

minimum

cannot

or

from

because

operational.

will
automatically,
damage

The

Fig.
cycle
what
unit.
shooting

information

pressure

22)

sequence

When

indicator

sequence.

illuminate

cases,

further

the

may

malfunction.

light

causes

1.

to

the

MC

board

12)

labeled

and

high

type

of

They

aid

test

on

the

manifold.

on

a

malfunction

lights

One

when

whether

testing

exact

cause

be

more

is

given

for

the

Short

Cycle:

beds

have
minimum
been

pre-set

beds

pressurize

minimum

will

be

activated.

Possible
nation
and

will

activate
four-way
flow

may

malfunction

should

that

gauges

page

An

malfunction.

and

cycle

Cause: Severe

valve

on.
NOTE:

come
four-way
done

problem.

The

On

together

failure.

to

determine

Refer

Section 7 for

dures

for

the

and

maximum

is

designed

be

overridden.

weak

battery

being

the

For

will

alerted

visible

Also,

cause

the

unit

thus

preventing

unit.

has

four

red

indicator

short

cycle,

pressure.

be

in

conjunction

can

be

to

Refer

24.

long

These

has

occurred

used

derived
the

test

to

occurs

will

or

one

must

of

than

come

possibly

the

or

be
the
one

on

unit

shuts

two

done

problem

possible

two

lights

explanation

below

This

along

light

indicates

pressurized

maximum

on

the

time

so

MC

board.

quickly

is

reached,

cycle

cause a decreased

this

alarm. A failure

or a severe

also

cause

this

alarm

short

and

no

cycle

whether

Further

to

the

sieve

proper

beds

the

exact

Service

and

testing

cycle

so

its

alarm

example,

not

prevent

a

to a system

alarm

most

lights

to

any

cycle,

shut

system
major

off

further

lights

(8

no

indicate

in

the

as a trouble-

with

by

points

normal!

these

the

attaching

(Fig.

cycling

alarm

in a certain

lights

off.

to

determine

since

cause

of

each

with

will

In

come

on,

there

for

alarm

possible

all

the sieve

too

soon.
time

If

the sieve

that

this

bed

contami-

cycle

restriction

to

lights

it

is a bed

cause

alarm

time

of

come

must

of

A

has

the

the

of

will

or

be

the

Instructions,

testing

proce-

four-way.

a

10/87

SECTION

5

ALARM

2.

Long

cycle

cycle

activated.
Possible

or

any

pre-set
NOTE:

by

itself

has
come
when a high
the

determine

problem.

Instructions,
testing

purge

on.

No

Cycle:

the

Possible

way

faulty

defective

of

flow

activate

SYSTEM

Cycle:

time.

time

been

on

unit.

depending

See

four-way

valve,

wiring

This

When

is

reached,

Cause: A faulty

problem

cycle

time

The

long

when

the

exceeded.

with

pressure

Further

the

Refer

Section 7 for

procedures

number 4 below:

This

light

valve

Cause:

inadequate

from

MC

board. A severe

or

contaminated

this

alarm.

light

indicates a long

the

pre-set

this

alarm

compressor,

that

causes

to

be

cycle

the

exceeded.

light

will

maximum

However,

the

high

pressure

situation

testing

Defective

must

exact

for

on

to

valve

cause

to

the

the

the

compressor

which

indicates a failure

shift

alarms

High

properly.

or

sticking

pilot

to

MC

beds

maximum

will

be

leak,

maximum

come

on

cycle

time

it

will

light

exists

be

Service

Pressure.

pressure,

board,

restriction

may

done

of

the

proper

come

four-

also

in

to

or

of

or

audible

Required”
illuminate.

The

lights
“four-way.”

Purge:

come

activated
Four-Way:

come
activated.

sieve

off,
Important:

designations
(Short
Pressure)

the

Bed,
Pressure.
DeVilbiss
either
malfunctions

same

alarm

light

MC

board

(8

Fig.

This

on

only

(approximately

This

on

only

At

bed

is

the

left

bed

Cycle,

some

following

Purge/Compressor,

These

Models

case

they

way.

will

sound

on

the

also

has

12)

labeled

These

are

green

when

green

when

the

same

being

pressurized.

is

pressurizing.

Instead
explained

Long

Cycle,

DeVO/MC44's

alarm

were

MC29

refer

and

and

control

two

green

“purge”

not

alarm

indicator

the

purge

1.0

indicator

the

four-way

time

of

in

No

light

designations:

4-way,

used

and

to

the

should

be

the

"Service

panel

indictor

lights.

light

valve

seconds).

light

valve

the

right

When

the

alarm

this

section

Cycle,

DeVO/44.

same

may

on

used

High

have

High

type

will

and

will

is

will

is

it is

the

in

of

the

NOTE:

come

way

be
the
Instructions,
testing
sieve

High

pressure

Possible
the

MC

NOTE:

lights

pressure

Further
determine

problem.

instructions,
testing

When

come
automatically
will

The

on

together

or

bed

done

to

problem.

procedures

beds.
Pressure:

situation

Cause:

activated

board

or

The

will

come
situation
testing

procedures

any

of

on

continue

short

failure.

determine

sticking

high

Refer

and

no

cycle

whether

Further

the

Refer

Section 7 for

This

Purge

position

pressure

on

the

Section 7 for

the

the

shut

to

to

for

the

light

in

the

system.

valve

due

valve.

together

exists

must

exact

to

for

the

four

red

compressor

off

but

operate.

indicates a high

lights

will

it

is a four-

testing

exact

the

the

four-way

remained

to a defective

and

when a high

in

be

cause

the

the

purge

indicator

the

must
cause
Service

proper

long

cycle

the

unit.

done

of

Service

proper

valve.

lights

will

cooling

Also,

and

the

fan

the

of

in

to

10/87

SECTION

6

TROUBLESHOOTING

4.

5.

o.

Visible | Audible | Compressor

Alarm

1.

OFF

2.

3.

ON

ON

OFF

OFF

Symptom

、

Alarm

ON

ON

ON

OFF

OFF

On

or

OFF

OFF

OFF

ON

ON

GUIDE

Off

Other

Symptoms

On/Ott

switch

illuminated | yo

On/Off

İN

utumına

Unit

warm

o

the

U

cannot

restarted

for

several | Low

minutes

Pulsating
air

noise

Excessive

noise

Line

not

[|

or

defective

Line
termina!

Defective
Blown

Defective

ted

Loose

Defective

Defective
Upper

disconnected

Compressor

a

Occluded

an

be

Restricted

passage

Defective
Defective

Felt
filters

Compressor
disconnected

Defective

mounts

Defective

Defective

Possible

cord

power

cord

fuse

Compressor

.

and

.

line

and/or

not

Problems

not

properly

at

receptacle

disconnected

block block

On/Off

in

power

MC

board

compressor

Capacitor

lower

overheated

filters

. : :

input

voltage

cooling
compressor

intake

in

place

intake

or

loose

compressor

cooling

installed | Insert

at

switch

connector

Wire

wiring

harness | Reconnect

due

to:

or

output

air

fan

bacteria

or

defective

hose

motor

fan

line

Check

fuse,

by

Circuit
other

receptacle

Reconnect

Replace
Replace

Replace
Tighten

Replace

Replace

Replace

Remove

Check
circuit

appliances

Replace
Replace

Check
necessary

Reconnect

Replace

Replace

Replace

Suggested

99

plug

in

cord

building

or

have

qualified

electrician.

may

be

appliances

may

line

switch
fuse

MC

board

or

attach

compressor

Capacitor

wiring

filters

obstruction

line

voltage,

independent

cooling
compressor

filters

hose

or

tighten

compressor

cooling

Remed

receptacle

circuit

fully

and

be

required.

cord

wire

harness

fan

replace

fan

breaker

wiring

loaded

another

at

terminal

use

alternate

of

other

motor

house

and

y

or

replace

checked

with

if

mounts

or

10/87

10

SECTION

6

TROUBLESHOOTING

Visible | Audible | Compressor

Alarm

6.

8.

OFF

7.

9.

10.

OFF

OFF

OFF OFF

OFF OFF

Symptom

Alarm

OFF

OFF

OFF

On

or

ON

ON

ON

ON

ON

Off

GUIDE

Other

Symptoms

Fluctuating | Occluded

flee

Littleorno
oxygen

flow

Audible

alarm

does

when

unit

_ |

isturned

Low

on
possible

increasein | Defective

cycle

Low
concentra-
tion
decrease
cycle

on } Defective

02

sn

time | Four-way

02

and

in

time

Possible

Use

of

improper

Occiuded
Occluded

and

tubing

Use

of

excessive

Defective

Air

leak

Defective
Defective
Defective
Pressure

properly

{Flow

meter

properly
Hose

disconnected

meter
Oxygen

kinked

or

Occluded

Defective 9 voit

Defective

Defective

Leaks

in

Defective
Defective

Occluded

Purge

valve

activated

Contaminated

Problem

!

humidifier

humidifier

filters
or

defective

tubing

flow

meter

in

system

compressor
reed

valve

check

valve

regulator
or

defective

not

adjusted

delivery

tubing

blocked
humidifier

battery

wire

harness

sonalert

MC

board

system

check

valves

reed

valve

compressor

valve

not

filters

stuck

position

sieve

'

not

to

in

cannula

adjusted

flow

fully

de-

beds

*

Clean

Use

only a bubble

Clean

Detach
tubing.
tained,
other
straighten
tubing

The

Ipm

meters)

(4mm)

Small
tion

may

flow

Replace

Check

fittings

Replace
Replace
Replace

|]

Adjust

regulator

Adjust

Reconnect

is

shifted | Clean

Straighten
obstruction

Clean

Replace 9 volt

Repair

Replace

Replace

Check

Replace
Replace

Replace

Replace
Refer

tions,

Purge

Replace

Suggested

99

or

replace

humidifier

or

replace

filters

cannula

check

obstructions.

if

unit
with a cannula

inside

diameter

of

any

prevent

rate.

for

or

flow

or

or

all

or

to
on

Valve

from

If

proper

flow

tubing

as

required

necessary.

is

designed

of

approximately

diameter

tubing

other

flow

obtaining

flow

meter

leaks

in

compressor
reed valve
manifold

replace

meter

hose

tubing

replace

humidifier

battery

replace

MC

board

MC

board

hoses

and

manifold
reed

valve

compressor

replace

four-way

filters

Section

7,

How

to

Trouble-shoot

sieve

beds

Remed

type

humidifier

O2

delivery

is

not

for

kinks

Clean

or

replace

to

deliver

on

50

tubing.

or

restriction

the

all

hoses

base

pressure

or

remove

wire

harness

fittings

base

Service

y

at-

or

or

5

feet

(15

5/32”

the

addi-

desired

and

valve

Instruc-

11

10/87

SECTION

6

TROUBLESHOOTING

Visible | Audible | Compressor

Alarm

11.

12.

13.

14.

15.

ON

OFF

OFF

OFF

ON

16.

17.

ON

ON ON

NOTE:

Some

designations

Symptom

Alarm

ON ON

ON

OFF

OFF

ON

ON

On

or

Off

OFF

ON

ON

OFF

OFF

.

OFF

MC

board

alarm

stated

in

the

lights

above

Other

Symptoms

Fluctuating | System
or

no

flow KPa)

Fan

operating

Visible

alarm

does

not
illuminate
when
is

turned

Low

pilot

pressure

Fan
operating, | property
short

and

no

cycle

lights

MC

board

itluminated

Fan
operating, { exceeded

long

cycle | teak

light

on

board
illuminated | Defective

Fan

operating, | position

long

cycle
andhigh
pressure
lights
MC

board

illuminated

may

be

troubleshooting

designated

GUIDE

Possible

due

Leak

in

Defective

Four-way

Blown

fuse on

Defective

Defective

panel | Defective

unit

on

Leak

in

Defective

accumulator

Defective

Defective
compressor

Four-way

MC

on

Contaminated

Severe

to:

Crimped
Occluded
Flow

meter

too

low

Maximum

in

SY

Defective

Four-way

Purge

valve

on

Problems

Oss!

pressure

system

pilot

restriction

system

г

below 9 PSI

to:

compressor

valve

not

MC

MC

board

bulb

MC

board

pressure

check

valve

compressor

reed

valve

valve

failed

sieve

,

tubing

humidifier

turned

cycle

time

due

to:

reed

valve
compressor
valve

not

stuck

board

of

in

fully

system

in

in

to

beds

flow

off

or

was

fully

activated

Bed,

guide.

Purge/Compressor,

See

Section 5 for

explanation

(62

Check

Replace

shifted | Clean

Replace
Replace

Replace

Replace

Check
fittings

pilot

shift

due

set

shifted | Clean

Replace

Replace

Replace

Refer
Instructions,
shoot

Refer

Instructions,

Troubleshoot

Straighten
Clean
Adjust

Check

Replace
Replace

Refer

Instructions,

shoot

4-Way,

and

High

of

the

Suggested

ugg

all

hoses

compressor

or

replace

fuse

MC

bulb

MC

all

pilot

manifold

compressor

reed

to

Section

Four-Way

to

Section

or

replace

flow

all

hoses

reed
compressor

or

replace

to

Section

Purge

Pressure

various alarms.

and

four-way

board

board

pressure

valve

7,

on

How

Valve

7,

on

How

Sieve

tubing

meter

and

vaive

on

How

Valve

Remed

fittings

base

Service

Service

humidifier

four-way

7,

Service

rather

y

valve

hoses

and

to

Trouble-

to

Beds

fittings

3

valve

to

Trouble-

than

the

10/87

12

SECTION

7

SERVICE

Proper
The

of

15)

Components
shelf
attainable.
tailed

replacing

Also,

Kit

the

ments
trator.
Service

Repair

DeVilbiss

service

and

in

information

to

(Part

necessary gauges,

to

The

(1) | 3/16”

(1)

(1)

(1)

(1)

(1)

(1) | 8"

(1)

(1) } 9/64”

(1)

(1) | 7/64”

(2)

(1) | Toolbox

(10) | Cabinet
(20) | #2
(20) | #8

(20) | #11

(20) | #12

(2)

| Pressure

(1)

In

addition
analyzer
concentration
needed

When

servicing
certain
parts
material

tape

are

is

DeVO/MC44

by

utilizing a vertical

accumulator

are

such a way

The

components

aid

service

#444-501)

properly

following

Kit.

Slotted

#1

Philips

#2

Philips

13/8”

Nut

7116”

Nut

6”

Crescent

Duckbill

5/32"

"T“

“T“

3mm

“T”

“T”

10-30

PS!

hose

Hose
Hose

Hose

Hose

Pressure

to

will

when

that

the

free

not

recommended

INSTRUCTIONS

Procedures

is

situated

as

to

service

head

head

driver

driver

wrench

pliers

Handle

Handle

Handle

Handle

Pressure

fasteners

clamp
clamp

clamp

clamp

test

test

the

be

needed

levels. A volt

voltage

the

of

compatible

section

for

troubleshooting

within

personnel, a DeVO

is

available

tools,

service

parts

screwdriver

screwdriver

screwdriver

allen

allen

allen

alien

gauge

assembly

assembly

Service

testing

DeVO/MC44

correct

oil

and

and

designed

shelf

on

the

make

which

and

the

oxygen

are

included

wrench

wrench | (444-593)

wrench | (MC29D-645)

wrench f (MC44D-710)

and

Kit,

to

check

meter

is

tools

grease

with

must

for

ease

divider

(1

provides

the

required.

are

oxygen.

be

(4

Fig.

divider

them

easily

system.

Service

contains

test

instru-

concen-

in

(444-592)

(444-591)

(444-524)
(444-537)

(MC29D-638)

(444-538)

(444-502)

(MC29D-606)

an

oxygen

the

oxygen

may

also

be

absolutely

used

or

Teflon

applied

Fig.

15).

and

de-

and

the

be

and
any

to

the

male

threads
eliminate
entering
sealant
tape.

NOTE:

components
nect
before
extra
operate
opened.

Cabinet
To

1.

2.

To

1.

2.

3.

4.

5.

To

1.

the

may

Due

the

AC

attempting

care

the

Covers

open

front

Loosen
and

on

allen

wrench

be

rotated

loosen

Carefully
to

the

trical

harness.

remove

Disconnect

(16

Fig.

ness.
Open

from

terminal

Disconnect

Fig.

11).

Remove

attached

24).

Remove

that

connects

the

flow

removed.

open

back

Loosen
back

of
allen
away

accumulator
Ensure
on

the

By

disconnecting

terminal

connect
Fig.

13)

completely.

omitting

the

possibility

oxygen

also

be

to

the

proximity

within

power

should

the

the

them.

right

front

10)

back

the

the

wrench

from

that

electrical

the

cord
repairs

be

unit

with

cover:

cabinet

sides

(See

1/4

turn

swing

to

avoid

cover

large

located

cover

block

termina!

1/16”

to

accumulator

hose

clamp

the

meter.

cover:

four

the

unit

and

the

shelf

undue

block

terminal

back

the

first

of

tape

system.

used

in

Loctite

place

of

the

DeVO/MC44,
from

the

on

the

taken

the

Either

unit

(6

if it

is

the

cabinet

fasteners

of

the

unit

Fig.

9).

Fasteners

counterclockwise

front

cover

damaging

completely:

quick-connect

in

main

and

disconnect

(6

Fig.

13).

to 9 volt

diameter

fitting

and

hose

pressure

end

of

cabinet

using a 5/32”

(1

connections.

Fig.

for

cover

then

until

Fig.

tension

the

line

13)

the

can

fasteners

pull

the

15)

and

hour

thread

particles

of

the

electrical

wall

unit.

necessary

at

using a 5/32”

(7

wiring

battery

hose

(8

regulator

hose

back

top

is

is

not

cord

the

be

to

“PST”

teflon

discon-

outlet

Also,

to

covers

the

top

should

to

Fig.

10)

the

elec-

terminal

har-

line

cord

(21

that

(2

Fig.

Fig.

10)
to

may

be

in

the

(4

mm)

cover

of

the

exposed.

placed

at

the

quick-

meter

removed

(4

is

13

10/87

SECTION

7

SERVICE

Flow

Meter

Each

flow

meter
accuracy
repairable
DeVO/MC44
flow
check
with
care
interconnecting
diameter
ingly
back
ence

The
which

To

1.

2.

3.

4.

5.

Pressure

The
the

back
PSI
field.
pressure
suitable
or
outlet.

when

necessary,
top
pressure

protective

from
A

malfunction
cause a loss
flow
cause a decrease
defective

of + 5%

in

rates

up

the

accuracy

devices

in

of

the

connection

and

unimportant

pressure

in

the

indicated

flow

meter

provides a more

replace

Unplug
Refer

front

flow

unit

to

cover.

Remove

end

of

flow

Remove

contro!

Remove
front

Install

Close
fasteners.

panel.

flow

of

control

new

front

Regulator

pressure

oxygen

flow

pressure

and

should

To

test

gauge

to

fit

on a short

The

flow

testing

turn

of

pressure

reads

coating

set

screw

as

shown

or

out

INSTRUCTIONS

(5

Fig.

2)

is

of

the

field.

is

designed

to

five

of

certified

hoses

as

short

variations

may

cause a noticeable

is

meter:

from

Service

hose

clamp

meter

the

two

meter

panel.

flow

meter

cover

regulator

to

the

on

the

system.

not

have

the

pressure

(Part

on

the

piece

of

meter

the

regulator.

the

allen

regulator

8.5

PSI

may

before

in

the

or

fluctuation
on

the

in

of

adjustment.

calibrated

full

scale

and

The

flow

meter

for

use

at

liters

per

operation,

accuracy

to

the

should

as

possible

and

test

be

in

reading.
pressure

accurate

wall

compensated

reading.

outlet.

Instruction B to

and

hose

(4

Fig. 12).

nuts

holding

by

pushing

in

reverse

and

secure

(10

patient

to

Fig.

and

It

is

be

adjusted

with

11)

pre-set

regulator

#444-591)

oxygen

tubing

should

and a fitting

outlet

connected

be

If

adjustment

head

set

until

(58.6

KPa)

have

to

adjustment

pressure

flow

oxygen

regulator

in

the

meter.

concentration

to

is

non-

on

8.5

PSI

minute.

do

so

exercise

flow

meter.

of

large

since

seem-

piping

differ-

open

from

meter

it

through

order.

cabinet

stabilizes

also

puts

at

in

use

(7

Fig.

to

set

at 2 LPM

screw

the

outlet

at 2 LPM

be

removed

is

made.)

oxygen

It

may

an

the

at

To

only

and

each

to

a

8.5

the

a

2)

the

is

on

(a

will
liter
also

if

To

replace

1.

2.

3.
sure

4.

Unplug
Refer

inet

Remove

Unscrew

pressure

unit

from

to

Service

covers.

hose

regulator.

regulator

clamp

tank.

5.

Install

tank,

new

attach

regulator

hose,

clamp.

6.

Close
net

fasteners.

Manifold

Two

check

allow

oxygen

(9

Fig.

11)
becomes
pressure.
oxygen

from

cabinet

Check

greater

They

covers

Valves

valves

to

enter

when

also

the

beds.

A

defective
crease
accumulator
pressures,
and

the

included

1/16”

(1.6

the

accumulator

barbed
Attach
end

of

accumulator
Then

install

assembly.

at5

LPM.

Notice
the

accumulator

25.5

PS!

and

purge

pressure

(131

KPa)

will

vary

the

liter

in

the

valve

opens,

accumulator,

until

maximum

check

in

oxygen

pressures.

use

pressure

pressure

in

the

DeVO

mm)

diameter

fitting

the

the

on

1/16”

pressure

tank

the

gauge

Turn

unit

that

during

will

(176

KPa)

shift

to

will

then

at 5 LPM.

according

flow,

the

accumulator

allowing

pressure

pressure

tank

(1.6

at

decrease

lower

NOTE: A defective

rapid

drop

in

accumulator

pressures

below

19

regulator:

wall

outlet.

Instruction B to

and

hose

from

on

and secure

and

secure

located

the

than

prevent

in

the

accumulator

sieve

the

reverse

the

bed

accumulator

accumulator

valve

will

result

concentration

To

check

gauge

test

Service

the

pressure
mm)
test

fitting

on

with

each

rise

which

(Part

assembly

Kit.

hose

(4

and

attach

test

hose

assembly

(Point F Fig.

on

the

the

cycle

the

to

approximately

point

start a new

to

as

This

minimum

to

liter

flow.

the

pressure

tank.

When

oxygen

will

check

to

start

is

reached.

valve
pressure

PSi

(131

KPa)

open

cab-

from

pres-

accumulator

accumulator

with

hose

with

cabi-

manifold

tank

pressure

flow

to

the

sieve

in a de-

and

lower

accumulator

#444-591)

(6

Fig.

Remove

Fig.

24)

it

to

the

from

the

assembly.

on

the

other

to

the

24).

pressure

liter

flow

test

set

pressure

the

four-way

cycle.

low

The

the

flow

to

will

as

19

pressure

higher

will

drop

check

into

increase

cause

as

well

The

the

at 5 LPM.

of

8)

in

PS!

a

as

10/87

SECTION

7

SERVICE

If a manifold

faulty,

Refer

to

replacement.

A

third
between
oxygen
oxygen
prevents

into

the

check

valve

completely.

A

defective

to

be

drawn

when

unit

final

bacteria
causing a restriction
difficult

To

replace

1.

Unplug

2.

Refer
front

3.

Remove
end

4.

Attach
that
VAC
fitting.

5.

Close
fasteners.

Molecular

The

two

ternately

passing
patient

Sieve

bed
pressure
located
pressures
when
fittings.
PSI

(6.9 - 13.8

The

efficiency

will

be

by

moisture.
molecular
adsorbing
in

oxygen

within

because

shorter

check

the

manifold

section K for

check

the

outlet

to

flow

gas

or

unit.

allows

final

is

turned

to

adjust

final

unit

to

cover.

hose

of

check

hoses

the

end

is

directed

Secure

front

Sieve

molecular

remove

through

with a constant

pressures

gauges

on

manifold

are

taken

Pressures

impaired

sieve
properties

concentration.

the

sieve

of

contamination

cycle

time.

INSTRUCTIONS

valve

is

base

manifold

valve
final
fitting.

water

When

(1

bacteria

This

in

only

from

unit

Fig.

one

accumulator

check

valve

in

from

the

off.

This

filter

and/or

of

flow

the

flow

rate.

check

valve:

from

wall

outlet.

Service

Instruction B to

clamp

and

valve.

to

new

check

of

the

check

toward

with

hose

cover

and

secure

Bed

Assemblies

sieve

beds

the

nitrogen

them

supply

can

be

to

the

test

assembly.

approximately

at

these

KPa)

of

will

when

the

molecular

if

it

test

be

bed

becomes

Contamination

materia!

to

resulting

bed

will

Cycle

time

determined

must

be

12)

filter

check

valve

direction

being

is

turned

tank

may

humidifier

may
the

and

hose

valve

valve

the

oxygen

clamps.

with

(1,2

from

and

provide

of

oxygen.

read

by

points

26

PSI

points

approximately

is

depressurized.

sieve
contaminated

lose

in a reduction

Also,

the

increase

which

will

to

replaced.

assembly

is

located

and

allows

drawn

off

to

drain

cause

water

bottle

occlude

flow

meter

making

open

from

ensuring

labeled

outlet

cabinet

Fig.

10)

the

attaching

(1

Fig.

Normal

(179
or

access

material

causes

its

nitrogen

pressure

faster

results

continue

be

the

and

back

this

the

it

each

al-

air

the

22)

bed

KPa)

1-2

the

in

to

a

decrease

severe.
decrease.
minimum
cycle

To

Tools

1.

as

Concentrations

Once

pre-set

alarms

test

sieve
needed:

(2)

Pressure

(2)

Pressure

Remove
fittings
corners

2.

Attach
assembly
the

manifold.

plugs

to

assembly.
assembly

3.

same

pressure

Fig.

Turn

(see

manner

22).
the

Figure

approximately
this

will
altitude
to

the

24.

4.

Check
A

oxygen

combination

low

oxygen

taminated

NOTE:
been
er

failure

done
of

failure

way

If

no
the

contamination

To

1.

2.

If

the

activated

the

problem

of

the

by

observing

the

unit.

and

valve

malfunction.

the

molecular

longer

replace

Unplug
Refer

effective,

malfunction

to

cabinet

bed

contamination

the

cycle

cycle

will

be

activated.

beds:

gauges
test

assembly

the

plugs

(6,11

Fig.

of

the

manifold.

the

1/16”

to

one

of

Then

the

barb

Attach

to

the

the
other
and

gauges

unit

on

22).

to

and

Normal

16

vary

slightly

and

the

liter

normal

cycling

concentration

of

concentrations

sieve

beds.

short

and

it

must

is

with

four-way

the

Short

cycling

noncycling

sieve

first

or

cause

and

take

the

molecular

unit

from

Service

covers.

becomes

will

also

continue

time

reaches

time

the

short

(Part

#444-591)

(Part

#444-502)

from

the

two

16)

located

1.D.

hose

the

attach

fitting

second

access

then

the

test

observe

seconds

from

access

one
on
pressure

fitting

connect

assemblies

cycle

at 2 LPM,

at

the

fittings

the

the

times

depending

flow

setting.

sequence

short

cycle

of

on

unit.

times

indicate

no

cycle

alarms

be

determined

the

valve

cycling

would

would

material

locate

(such

corrective

sieve

wall

outlet.

sieve

bed

to

shift.

or

noncycling

indicate

indicate a four-

is

found

the

source

as

leaks)

actions.

beds:

Instruction B to

more

the

and

no

access

the

top

test

of

the

test

test

in

the

the

(4,7

cycling

are

but

Refer

page

and

con-

have

wheth-

or

This

bed

to

open

to

on

on

a

is

be

of

for

15

10/87

SECTION

7

SERVICE

3.

Remove

brackets

to

4.

Remove

fittings

5.

Remove
ing

6.

Install

Make
serial

unit.

NOTE:
removed
prior

7.

Leak
fied
“Snoop”

8.

Close
net

Four-Way
The

pneumatically

(14

Fig.
supplied
cular
onds.
other
four-way
through
the

manifold

be

released

The

four-way
pneumatically,
that

allows

the

four-way.

(approximately

board
pressure

four-way

pressurize.
accumulator
removing

will

cause

pressurize
NOTE:

the

oxygen

will

take

pending
If

the
system
cycle
See

Section

the

unit

vertical

the

at

from

new

sure

number

Ensure

to

connecting

test

leak

cabinet

fasteners.

Valve

11)
by

the

sieve

beds

While

bed

is
valve.

the

from

causing

to

is

activated

the

the

the

The

four-way

approximately

on

altitude

four-way

may

lights

INSTRUCTIONS

thumb

(1

Fig.

hose

top

hose

fittings

sieve

the

from

hose

detection

or

“Search”.

alternately

compressor

one

being

four-way

to

uses

pressure

This

it

activate

Once

tank,

signal

four-way

left

accumulator

be

activated

on

the

5,

Alarm

screws

11)

that

secure

divider.

clamps

of

sieve

clamps

at

beds

end
and

that

the

beds.

and

bottom

in

of

bed

label

the

sealing

new

and

reinforced

with

is

sieve

hoses.

connections

compound

covers

and

operated

secure

four-way

distributes

to

approximately

bed

is

being

pressurized

exhausted

Exhaust

the

purge

the

unit.

valve,

an
to

pilot

12-15

to

the

the

the

to

sieve

valve

open

the

gases

are

directed

valve

while

external

shift

the

valve

receives a signal

VDC)

and

four-way.

right

bed

fills

cycle

the

pilot

to

deactivate

bed.

will

tank

11

and

liter

flow.

does

not

shift,

and

the

MC

board
System.

(2

Fig.

11)

and

sieve

beds

tubing

from

tub-

of

sieve

beds.

reverse

at

nine

the

caps

beds

order.

digit

top

are

just

with a certi-

such

with

cabi-

valve

pressure

the

two

mole-

every

11

sec-

the

through

the
passing
through

so

they

can

operating

pilot

valve

spool

inside

from

the

MC

allow

sieve

the

is

changed

When

bed

oxygen

valve.

pilot

the

will

This

and

not

shift

until

is

filled.

seconds

the

short

will

If

This

de-

alarm

and

illuminate.

the

alarm

of

as

by

no

system

low

the
There

is

oxygen

same

are

not

concentrations

bed

several
malfunction.
determined
action

Some

(1)

can

be

reasons

Continuous

four-way.

(2)

Little

or

(3)

Foreign

spool

from

(4)

Defective

(5)

O-rings

To

1.

2.

test

venting

Connect

DeVO

22)
Turn

the

four-way

Service

located

unit on

indicator

on

the
illuminated
vated

and

surizing.

instead,
did

not

properly

If

the

right
observe
left

bed
reached
pressurize
bed

continues

shifting,

to

the

normal

24.

3.

Place

the

the

terminals

16)

on

top

mately

while

the

illuminated
approximately
oxygen

reading

broken
the

MC

are

found,

activated,

will

continue

reasons

The

cause

before

the

taken.

for

four-way

or

no

voltage

no

pilot

pressure.

matter

inside

shifting.

or

damaged

on

sleeve

valve

from

valve:

pressure

on

gauges

Kit

to

the

manifold.

and

light

(8

Fig.

MC

board.

the

four-way

the

right

If

the

left

this

indicates

shift.

bed

does

whether

once

or

the

if

the

again.

pressure

right

In

to

further

test

testing

cycling

leads

(See

of

the

12-15

green

VDC

four-way

(voltage

11

accumulator

is

not

obtained,

wires

from

board.

If

no

replace

the

short

cycle

will

result

to

pressurize.

for

the

of

failure

proper

failure

to

valve

four-way.

may

be

shifting

furnished

the

test

observe

12)

labeled

When

should

bed

should

bed

that

pressurize

is

shift

point
bed

either

pressurize

is

needed.

sequence

of a volt

test

position

pilot

valve.

should

indicator

will

be

seconds

tank

is

check

the

four-way

loose

or

MC

board.

times

because

four-way

must

corrective

are:

pilot

valve

preventing

worn

pre-

properly.

in

points

the

(Fig.

green

four-way

this

light

be

acti-

be

pres-

pressurizes

the

four-way

first,

shifted

to

pressure

proceeds

case,

if

either

without

Refer

on

page

meter

C,

Figure

across

Approxi-

be

measured

light

supplied

or

until

filled).

for

If

loose

valve

broken

wires

and

to

be

on

the

is

the

is

to

is

for
the
this

or
to

10/87

16

section.)

SERVICE

4.

Test

for

Instruction

5.

If

12-15

VDC

leads

to

four-way

normal

defective

inside
either
removed

To

remove

1.

Unplug

2.

Refer

front

3.

Disconnect

on

4.

Remove
pilot

5.

Remove
Fig.
allen
gasket

NOTE:
manifold

are

cleaning

To

clean

1.

Remove

the

valve
with
will

located
manifold

2.

Remove
valve

spacers

position

3.

Carefully
Using a non-metallic

diameter
slowly

the

will
Remove
inspect
are
using
to
valve

then

valve

case

to

four-way

unit

to

cover.

pilot

valve

the

valve

the

16)

from

wrench.

can

Do

not

will

or

the

four-way

the

top

of

body

the

remain

between

the 4 screws

so

and

of

push

valve

cause

the

them

damaged,

valve

reinstallation

body.

INSTRUCTIONS

pilot

or

Service

remain

pilot

should

that

remove

pressure.

“J”,

Pilot

is

measured

four-way

foreign

causing

the

four-way

clean

or

valve:

from

wall

Instruction B to

the

two

(14

Fig. 16).

pilot

(13

Fig.

16).

two

allen
top
The

now

be

remove

on

replacing

valve:

two

allen

four-way

can

now

valve.

on

the

the

also

the

spring

these

parts.
spool

no

greater

the

sleeve

body.

(Note:

o-rings

“O”

rings

for

signs

they

rebuild

of

See

Pressure

and

System.

at

pilot

connecting

pressure

valve

matter

it

to

has

malfunction.

valve

replace

it.

outlet.

wires

from

pressure

of

four-way

top

head

or

valve

tubing

cap

removed.

manifold.

the

unit

whether

the

valve.

head

screws

valve.

be

The

The

removed

valve

unit. A rubber

valve

body

be

removed.

from

the

ends

end

plates,

can

be

removed.

from

valve

rod

or

dowel

than

the

out

either

Pushing

to

roll

and

from

the

of

damage.

should

Kit

the

be

#MC44D-707

sleeve

Service

is

either

gotten

must

open

terminals

from

screws
using

body

and

The

you

from

top

or

along

manifold

gasket

and

valve

of

plastic

Note

body.

with

sleeve,

end

too

fast

jam).

sleeve

If

and

they

replaced

prior

into

is

In

be

(2

an

the

the

a

of

the

deposits
spacers

needed.

the

spool

substance

adversely

valve).

6.

Rinse

and

dry

Reinstall

7.

Ensure
both
of

any

cloth

used

8.

Carefully
(turning

knick

placement
spacer

valve

9.

Reassemble

reverse

To

replace

1.

Align

Ensure

Secure

2.

Attach

valve.

3.

Reconnect

pilot

4.

Replace

cabinet

H.

Purge

Valve

Like

the
operated
external

receive a signal

from

the

cycle

(except
activated
While

the
transferred
depressurized
closed.

exhaust
exhausted.

Fig.

the

When

19)

located

compressor.

have

been

and

spring

may

(Important:

or

sleeve

for

cleaning.

the

affect

spool

the

and

with a soft,

or

that

the

valve

foreign

replace

“0”

the

air

body

matter. A ciean

or a compressed

to

clean

these.

push

sleeve

it

slightly)

the

o-rings.

of

spool,

and

push

until

body.

remaining

order.

four-way

valve

that

with

pilot

body

gasket

two

pressure

the

two

valve:

and

allen

valve.

the

front

cover

fasteners.

four-way,

purge

pilot

valve

valve.

This

(approximately

MC

for

port

It is

board

the

purge

from

opens

at

the

first)

causing

approximately

is

activated,

the

pressurized bed

bed

and

the

purge

allowing

released

on

the

vertical

removed.

also

never

or

operation

sleeve

clean,

rings

passages

and

The

be

cleaned

try

to

use

an

This

thoroughly

lint-free

on

sleeve.

(ports)

manifold

plastic

scrape

abrasive

would

of

are

lint-free

air

hose

can

into

valve

so

you

do

not

cut

To

ensure

use

white

spool

parts

gasket

is

aligned

head

screws.

tubing

wires

on

and

the

pneumatically

(13

Fig.

pilot

proper

plastic

is

flush

of

valve

on

manifold.

properly.

to

terminals

secure

11)

uses

valve

12-15

beginning

the

purge

1.0

of

seconds.

oxygen

to

the

exhaust

is

deactivated

nitrogen

through a muffler

divider

port

behind

if

the

cloth.

in

free

be

body

or

with

in

pilot-

of

with

an

will

VDC)

each

to

be

is

the

is

the

to

be

(6

5.

Wash
in

warm,

the

spool

soapy

and

water

sleeve

until

(less

all

“O”

rings)

of

the

17

10/87

SECTION

7

SERVICE

The

opening

can

be

observed

to

the

test

points

When
sudden
sudden

changes.
pressures
increase
hear

purge
heard

A
will
taneously

red
illuminated.

the

position,
activated

(1)

the

increase

decrease

When

in

and

the

oxygen

is

activated

when

purge

valve

cause

long

cycle

purge

but

noticed:

No

sudden

bed

pressures

will

go

(2)

Only

the

cycles.

(3)

Possible
especially

There

are

to

malfunction.
determined
action
failure

(1)

can

are:

Continuous

purge.

(2)

Little

or

(3)

Foreign

spool

from

(4)

Defective

(5)

O-rings
venting

To

test

purge

1.

Connect
DeVO

22)

located

2.

Turn
indicator

the

MC
illuminated
the

purge

purge

the

the

both
and

See

valve

the

up

exhaust

drop

several

be

no

matter

the

pressure

Service

unit

INSTRUCTIONS

and

closing

by

attaching

(1,

is

in

pressure

in

the

sieve

decrease

being

and

valve

stuck

sieve

activate

and

high

Section

remains

alarm

the

following

increase

when

and

down

in

at

the

reasons

The

before

taken.

or

no

pilot

shifting.

or

damaged

on

sleeve

valve

valve:

Kit

on

the

on

light

(8

board.

(approximately

should

of

the

pressure

Fig.

22)

on

activated

in

the

other

purge

beds

is

deactivated

will

respectively.

transferred

the

exhaust

is

deactivated.

in

the

activated

beds

to

pressurize

the

alarm

pressure

5,

Alarm

in a deactivated

system

symptoms

and

decrease

cycle

gradually.

can

be

heard

oxygen

higher

liter

for

cause

of

the

proper

Some

reasons

voltage

to

pressure.

inside

valve

purge.

may

from

shifting

gauges

to

the

manifold.

and

observe

Fig.

12)

labeled

When

be

activated

purge

valve

gauges

the

manifold.

there

will

be

one

bed and

as

the

cycle

the

continue

You

when

will

will

the

also

to

be

position

simu!-

system.

lights

The

will

be

System.

will

not

be

may

be

of

sieve

changes.

when

They

unit

concentration,

flows.

the

purge

failure

valve

must

be

corrective

for

purge

pilot

valve

on

preventing

be

worn

pre-

properly.

furnished
test

this

1.0

in

points

the

green

purge

light

seconds)

and

the

(Fig.

on

there

a
a

If

is

should
of

pressure

The

absence

cates

activated.

sequence

3.

Place

the

the

terminals

located

Approximately

measured

tor

light

supplied

İf

this

loose
valve
broken
board.

4.

Test

Instruction

5.

If

12-15

leads

normal

defective

inside

either

removed

To

remove

1.

Unplug

2.

Refer
cabinet

3.

Disconnect
on

pilot

4.

Remove

pilot

valve

5.

Remove
from
The

top

be

removed.

NOTE:

The

whether

valve.

To

1.

Do

valve

clean

purge

Remove
the

top
valve
along

manifold
rubber

be a sudden

in

the

of

that

the

Refer

on

page

test

leads

(See

on

top

while

is

illuminated

for

approximately

reading

or

to

wires

for

to

then

valve

case

purge

unit

to

covers.

valve

top

or

not

manifold

you

or

with

gasket

broken

the

MC

are

pilot

"J",

VDC

is

purge

the

or

foreign

causing

the

to

clean

valve:

from

Service

the

(4

the

pilot

(5

Fig. 16).

the

two

of

purge

valve

remove

are

valve:

the

two

of

purge

valve

the

will

is

cleaning

body

increase

and

respective

this

purging

purge

to

24.

was

the

not

normal

of a volt

test

position

of

the

pilot

12-15

the

VDC

green

(voltage

purge

1.0

not

obtained,

wires

from

board.

found,

pressure.

Pilot

medsured

and

purge

If

replace

See

Pressure

at

pilot

valve

matter

it

to

malfunction.

purge

or

wall

valve

replace

outlet.

it.

Instruction B to

two

wires

from

Fig.

16).

pressure

allen

head

using

an

allen

body

and

gasket

the

valve

will

remain

or

replacing

allen

head

valve.

pilot
remain
located

can

The

now

valve.

on

between

decrease

sieve

beds.

action

indi-

properly

cycling

meter

no

tubing

across

B,

Fig.

valve.

should

indica-

will

seconds).

check

the

purge

loose

the

Service

System.

connecting

pressure

is

either

has

gotten

must

open

terminals

from

cap

screws

wrench.

can

manifold.

on

the

screws

top

be

the

removed

The

unit.

from

of

valve

valve

16)

be

be

for

or

MC

is

In

be

now

unit

the

the

A

10/87

18

SECTION

7

SERVICE

body

and

removed.

2.

Remove
valve
spacers and

position

3.

Carefully

Using a non-metallic

diameter

slowiy

the

will

Remove
inspect
are

using
to
valve

5.

Wash

in

deposits

spacers

needed.
the

substance

adversely

valve).

sleeve.

6.

Rinse

and

7.

Ensure

both
of
cloth

used

8.

Carefully

(turning

knick

placement

spacer

valve

9.

Reassemble

reverse

To

replace

1.

Align

Ensure

Secure

Attach

Reconnect

pilot

the 4 screws

so

of

remove

push

valve

cause

the

them

damaged,

valve

reinstallation

body.

the

warm,

have

and

(Important: Never

spool

Reinstall

the

dry

with a soft,

that

the

valve

any

foreign

or a compressed

to

clean

it

the

and

body.

order.

purge

valve

that

with

pilot

valve.

INSTRUCTIONS

valve

manifold

that

the

spring

these

can

parts.

spool

no

greater

the

sleeve

body.

(Note:

o-rings

“O”

rings

for

signs

they

rebuild

of

spool

and

soapy

or

spool

push

water

been

spring

sleeve

for

cleaning.

affect

the

or

and

the

air

body

matter. A clean

these.

sleeve

slightly)

o-rings.

of

spool,

push

until

remaining

valve:

body

and

gasket

two

allen

pressure

the

two

may

clean

should

from

the

end

plates,

be

removed.

from

rod

or

than

out

Pushing

to

roll

from

of

damage.

should

Kit

#MC44D-707

the

sleeve

sleeve

(less

until

removed.

also

or

use

operation

replace

sleeve

lint-free

passages

and

manifold

air

into

so

you

To

ensure
use
spool

parts

gasket

is

aligned

head

tubing

wires

on

also

ends

plastic

valve

body.

dowel

the

sleeve,

either

end

too

and

the

sleeve

be

replaced

into

“O”

all

The

be

cleaned

try

to

an

abrasive

This

would

“O”

rings

thoroughly

cloth.

(ports)

are

lint-free

hose

can

valve

do

not

proper

white

is

flush

of

valve

on

manifold.
properly.

screws.

to

pilot

terminals

be

of

the

Note

with

a

of

fast

jam).

and

If

they

prior

the

rings)

of

the

plastic

if

scrape

of

the

on

in

free

be

body

cut

or

plastic

with

in

valve.

of

4.

Replace

with

cabinet

Compressor

The

DeVO/MC44
Thomas
the

KPa)

the

compressor

system

every

unit

by

14).

A

defective

times

resulting

tions.

Long

system

when

exceeded.

will

illuminate.

A

compressor

cause

excessive

also

result

Usually

this
component
gasket,
(except

compressor

or

the

566.
NOTE:

These
inspected
proximately

A

built-in

thermal
compressor
protects
by a heat

To

A

pressor.

power

tested.

test

240

the

build-up.

compressor

VAC

If

the

is

turned

This
compressor
test

light.

(See

İf

no

voltage
broken
nector
replace

the
capacitor

To

Testing

testing

wires

and

the

compressor

or

test

the

the

of
pressures.
Service
or
also

Instruction

rising

slowly,

low

or

the

cabinet

fasteners.

uses a double

(14

up

to a maximum

cycle.

It is

four

rubber

compressor

in

lower

cycle

times

the

maximum

In

this

case,

See

Section

that

is

noise

and/or

in a reduced

is

caused

such

as a reed

teflon

teflon

service

ring.

ring)

kit

internal

and

changed

10,000

hours

cutoff

off

if it

becomes

compressor

voltage:

is

required

compressor

on,

the

voltage

can

connector

Figure

is

detected

between

MC

board.

MC

board.

connector

compressor

compressor

compressor

the

pilot

pressure

First,

test

"J“.

test

sieve

rising

slowly,

covers

and

head,

Fig.

14)

to

of

28

secured

motor

will

will

to

mounts

cause

oxygen

activate

the

longer

concentra-

pre-set

the

red

long

5,

Alarm

worn

or

defective

vibration.

pressure

by a defective

valve,
These
are

(21

included

Fig.

26),

components

Part

components

if

necessary

of

unit

operation.

switch

will

overheated.

from

damage

to

operate

does

not

start

voltage

be

input

checked

using a volt

18).
check

the

If

the

If

there

itself

for

proper

for

compressor

wiring

is

then

either

is

defective.

output:

involves

and

for

pilot

pressure.

If

pilot

pressure

bed

pressures.

then:

secure

oil

free,

pressurize

PSI

(193

base

of

(13

Fig.

cycle

the

alarm

cycle

is

cycle

light

System.

may

It

may

output.

internal

o-ring,

in

the

#955-

should

at

shut

be

ap-

the

This

caused

the

com-

when

must

be

at

the

meter

loose

or

or

con-

is

good,

voltage

at

the

both

the

sieve

bed

See

is

low

If it is

19

10/87

SECTION

7

SERVICE

or

rising

slowly,

also

low

or

rising

(1)

Compressor

compressor

(2)

There

is a severe

(3)

One

or

more

occluded.

Check
solution

ensure
compressor
are
pressor
or

To

1.

2.

3.

4.

5.

6.

7.

To

nents:

for

found

replaced.

remove

Refer
cabinet
completely
compressor

not
Remove

intake
intake

Turn
compressor

Remove
washers
driver.

Carefully
and
connect
behind

Loosen

the

Fig.
be

accomplished
lifting
and

Remove
and

Fig.

that
inspect

1.

Remove

25)

25)
same

air

such

that

filter

and

must

compressor:

to

covers.

have

to

hose

baffle.

unit

motor

(3

disconnect

terminal

the

hose

black

19)

from

the

outward

compressor

unscrew

14)

from

it

can

and/or

the

that

hold

in

place.

time.

INSTRUCTIONS

test

sieve

bed

slowly,

reed

valves,

itself

may

leak

of

leaks

using a leak

as

“Snoop”

the

air

are

not

filters

then

Service

are

be

removed

Instruction B to

The

removed

removal.
be

removed

hose

clamp

(11

Fig.

face

down

directed

mount

Fig.

21)

place

unit

the

compressor.

clamp

rubber

pressure

compressor

more

compressor

while

the

four

bottom

be

placed

replace

four

allen

each

compressor

Remove

pressures.

then:

teflon

be

defective.

in

system.

unit

filters

or

“Search”.

intake

occluded.

not

occluded,

and

back

cover

to

make

The

front

completely.

and

compressor

14)

from

on

work

upward.

nuts

(2

using a 7/16”

in

an

upright

compressor

(15

Fig.

(4

Fig.

19)

exhaust

fitting.

easily

slightly

removing

from

base

motor

of

compressor

on

the

work

internal

head

screws

both

heads

If it

ring

or

the

may

detection

Also

filters

If

no

leaks
com-

repaired

open

should

it

easier

cover

compressor

surface

Fig.

14)

and

by

the

mounts

head

for

does

with

21)

and

nut

position

quick-

located

remove

hose

This

can

carefully

upward

hose.

assembly

surface.

compo-

(4

Fig.

(3

Fig.

at

the

is

be

or

be

(3

(13

so

2.

Check
the
compressor
are

3.

Remove
There

side

NOTE:

of

the

piston

the

reed

4.

The

valve

valve

inside
reed

To

replace

(A)

(B)

(C)

(D)

(E)

5.

Check

the

bottom
damaged.

6.

Remove

upwards

Fig.

or

To

replace

(A)

for

proper

gaskets

(6,21

heads.

damaged.

reed

is a reed

of

the

valve

Scratches

are

or
normal.

valve.

reed

valves

plate.
plate,

valve.

Remove

valve

plate
Reed

Place

edges,

of

the

reed

(8

and
valves

If
or

valve:

screw

Fig.

the

between

forefinger.

mately

1/8”

direction

Place

the

down

on

valve

Position
centered
hole

in

the

Place

the
retainer
valves

have

these

rubber

for

of

on

only

with

proper

o-ring

the

sleeves

and

26)

on

pistons.

damaged.

teflon

Remove

piston
can
teflon

screws

(2

be

removed.

ring.

placement

Fig.

Replace

valve

valve

plates.
slight

should

it

is

broken,

foreign

head,

(9

26)

discard

flex

new

Gently

(3mm))

of

flex.

concave

plate.

the

new

and

completely

valve
nylon

on

the

the

bottom

the

metal

the

reed

placement

(13,15

valve

(12,16

inspect

ring:

(3

Fig.

26)

or

26)

on

them

plates

(8,20

(7,17

Fig.

indentation

These

are

be

flush

not

matter

replace

Fig.

in

reed

in

reed

or

26)

position

valve.

only

ane

valve,

your

bend

to

determine

side

of

reed

plate.

keeper

reed

valve.

of

retainer.)

valve

or

Fig.

plate.

Replace

Fig.

26)

teflon

Replace

so

Fig.

that

if

26)

retainer

Discard

damage
bottom

if

Fig.

26)

on

on

caused

with

flush

is

detected

clean

holding

on

direction.

by

thumb

(approxi-

reed

so

that

covers

and

valve

Secure

screw.

damage

26)

on

by

pulling

rings

badly

from

defective

to
of

they

26).

each

top

by

the

with

the

reed

valve

the

and

the

face

it

is

the

metal
(Reed

plate

of

the

if it is

(4,23

worn

top

of

plate

10/87

20

SECTION

7

SERVICE

10.

Secure

To

replace

1.

Remove
the
and

new

2.

Inspect

damaged.

3.

Install
compressor.
tight”.

4.

Place
threaded

mounts

5.

Reconnect

pressor

hose

6.

Reconnect

terminal

7.

Turn

directed

nuts

NOTE:

mount
rubber

cause

8.

Reconnect

Fig.

9.

Replace cabinet
quick-connect
connected

cabinet
Pilot
The

system

purge

mately

the

manifold
allows
from
accumulator
the
accumulator
valves
externally

mm)

A

defective

accumulator

compressor
compressor:

the

compressor

attach

compressor.

rubber

motor

compressor

extending

fitting

clamp.

(9

unit

on

motor

When

with

mount. A twisted

excess

14)

to

fasteners.
Pressure
compressed

is

used

valves.

22-28

pilot

accumulator

(1

compressed

escaping.

manifold.

on

the

mounted

tubing.

INSTRUCTIONS

heads

with

the

screws.

intake

it

rods

black

the

Fig.

face

upward

tightening

one

vibration

compressor

intake

before

System

to

This

PS!

Fig.

is

cavity

check

or

baffle ( 8

intake

to

the

intake

motor

mounts

Tighten

on

at

bottom

through

rubber

(2

Fig.

compressor

25).

down

and

mounts.

hand

or

baffle

covers.

terminals

securing

air

in

activate

compressed

(152-193

20).

An

air

to

enter

The

inlet

connected

The

outlet

is

connected

purge

“T”

fitting

valve

leak

in

Fig.

fitting

fitting

mounts.

on

them

base

only

assembly

holes

hose

25)

and

quick-connect

with

install

to

nuts,

avoid

washers

hold

motor

noise.

intake

(8

Fig. 14).

Ensure

are

the

pilot

the

four-way

air

KPa))

cavity

internal

and

side

of

internally

of

and

4-way

and

in

the

pilot

14)

from

(8

Fig.

25)

on

the

Replace

bottom

of

“hand

with

of

motor

in

base.

to

com-

secure

with

compressor

and

motor

twisting

mount

hose

that

may

(11

all

properly

covers

with

pressure

and

(approxi-

is

stored

within

check

the

valve

prevents

the

pilot

within

the

pilot

to

the

pilot

by

an

1/16”

(1.6

the

pilot

pressure

if

in

it

tubing
This,
four-way

To

1.

in

test

Refer

would
turn,

and/or

pilot

to

cabinet

2.

Remove

the

pilot

3.

Attach
barbed
test

assembly

the

DeVO

4.

Attach

other
fitting

5.

end

on

Install a pressure
assembly.

6.

With

the

readings

22

to

28

range

may
another.
pressure
compressor.
to

help

working

7.

If

pilot

pressure.

8.

If

sieve

for

leaks

leaks

are

the

pilot
internally.
base

must

9.

If

sieve

slowly,

(A)

Compressor
or
defective.

(B)

There

(C)

One
occluded.

.

Manifold
The

of

the
mounted
Fig.

Assembly

manifold

vertica!

valves,

16).

separately

result

in

lower

pilot

could cause a malfunction

purge

valve.

pressure:

Service

Instruction B to

covers.

the

pilot

valve

on

the

pilot

fitting

on

(3

Service

the

1/16”

of

the

the

pilot

unit

operating,

should

PSI

(152-193

vary

This

as

that

Therefore,

determine

pressure

the

four-way

pressure

one

Fig.

23)

Kit.

(1.6

test

valve

gauge

be

alternating

slightly

is

essentially

being

if

tubing

tubing

end

of

the

that

is

mm)

hose

assembly
(Point

on

pilot

KPa).

This

from

exhausted

it

can

the

compressor

(4

included

D,

one

also

properly.

pressure

bed

in

found,

accumulator

be

bed

then:

the

is a severe

or

assembly

These
for

is

low,

pressures

the

pilot

then

If

confirmed,

replaced.

pressures

reed

compressor

more

of

divider

the

and

four-way

valves

cleaning

check

are

normal,

pressure

the

check

may

the

are

also

valves,

itself

leak

in

system.

unit

filters

is

located

has

two

and

can

or

replacement

system.

be

low

teflon

on

be

pressure.

of

the

open

from

Fig.

23).

to

the

pressure

in

on

the

to

the

Fig.

23).

the

test

pressure

between

pressure

unit

to

the

same

by

the

be

used

sieve

bed

check

If

no

valve

in

leaking

manifold

or

rising

ring,

may

be

may

be

the

front

externally

purge

(see

removed

when

is

21

10/87

SECTION

7

SERVICE

(A)

Compressor

or

the

defective.

(B)

There

is a severe

(C)

One

or

occluded.

K.

Manifold

The

of

the

mounted

Fig.

separately

necessary.

does
The

valves,

cavity
procedures

the

valves
entire

not

attempt

To

remove

1.

2.

3.

NOTE:
a

bending
breakage
disconnecting

4.

5.

6.

7.

8.

Assembly

manifold

vertical

valves,

16).

These

for

The

not

have

manifold

an

orifice,

with

check

reveal

result

of a failure

or

any

manifold

take

the

to

change

manifold:

Unplug

Refer

front

Cut the

center
of

to

cover.

the

Care

unit

cable

oxygen

manifold

must

of

Loosen

and

from
(7,9

Loosen

and

bottom

Disconnect

on

(4,14

Remove
screws
right

right

the

Fig.

right

the

Fig.

face

hose

16).

hose

of

four

the

located

Carefully

from

the

other

service

force

the

16).

pull

vertical

INSTRUCTIONS

reed

compressor

more

assembly

divider

the

valves

cleaning

base

of

to

be

removed

base

contains

and a pilot

valve.

that a unit

internal

base

base

of

any

from

wal!

instruction B to

tie

outlet

assembly

be

taken

which

fitting

this

tubing.

clamps

sieve

bed

top

of

the

clamps

sieve

the

manifold

the

wires

way

and

two

manifold

at

the

of

the

manifold

the

manifold

divider a short

valves,

leak

of

unit

is

located

and

4-way

or

the

If

of

one

must

the

internal

outlet.

clamp

tubing

on

the

and

oxygen

manifold

and

bed

from

upper

teflon

itself

in

has

and

can

replacement

manifold

in

may

system.

filters

two

may

on

the

externally

purge

be

removed

assembly

this

case.

internal

when

check

accumulator

troubleshooting

malfunction

of

these

check

problem,

be

manifold

and

(8

to

could

manifold

remove

then

replaced.

apart

components.

open

remove

from

the

Fig. 16).

avoid

applying

result

the

supply

when

assembly

remove

hoses
unit

purge

base

(16

the

pilot

left

the

from

Fig. 11).

terminals

valves

mounting

and

lower

base.

assembly

distance

ring,

be

be

front

(see

is

the

Do

or

the

the

top

in

left

hoses

left

the

away

to

gain

access

back

of

the

9.

Loosen

hose

compressor

fitting

(3

Fig.

assembly.

NOTE:
installed
must

If a replacement

immediately,

be

tightly

contamination.

To

replace

1.

Remove

defective
the

2.

Remove

fittings

NOTE:
ing

or

3.

Attach

inlet

secure

4.

Position
vertical
screws

manifold:

the

manifold

new

manifold

protective

on

Care

should

otherwise

the

fitting

with

the

divider

in

the

corners.

5.

Install

sieve

bottom

hose

6.

Install

oxygen

top

new

7.

Install

hose

left

right

first

bed

of

clamps.

the

tubing

of

the

cable

the

to

the

sieve

manifold

bed

clamps.

NOTE:
right

the

(outside)
manifold

NOTE:

to

violet-brown
way

8.

Connect

pilot

the

Care

(inside)

left

manifold

sieve

fitting.

valves

The

yellow-brown

purge

pilot

valve

must

sieve

the

pilot

wire

to

the

air

manifold

(see

clamp

exhaust

20)

and

manifold

the

sealed

4-way

and

and

base.

replacement

be

taken

damaging

compressor

on

back

hose

clamp.

manifold

and

upper

the

hoses

the

smaller

left

right

on

manifold

(1/8”

on

the

manifold

tie

clamp.

right

sieve

left

manifold

oxygen

fitting.

be

taken

bed

hose

fitting,

bed

hose

electrical

of

the

4-way

valve

(upper

pair

connects

(lower

unit).

inlet

Figure

and

hose

remove

sieve

to

prevent

purge

install

covers

manifold

to

the

fittings.

exhaust

of

manifold

assembly

secure

and

and

the

fittings

unit

(3.2

center

and

secure

bed

oxygen

fitting,

supply

Tighten

to

insure

is

and

on

wire

and

wire

fitting

on

20).

remove

from

manifold

is

not

bed

valves

them

from

unit.

avoid

scratch-

to

on the

with

lower

then

the

at

and

tighten

mm)

fitting

with

supply

and

hose

to

that

connected

the

the

pairs

to

purge.

pair

connects

unit),

and

to

the

the

the

inlet

to

be

hoses

bed

from

on

hose

the

and

two

right

left
the

1.D.)

at

the

the
the

hose

the

to

left

right

the

the

four

a

10/87

22

SECTION

7

SERVICE

objects

on
To

1.

2.

3.

4.

5.

.

Cooling
The

constant
defective
pressor
off.

To

1.

2.

3.

4.

5.

NOTE:
flow
is

6.

7.

Microcomputer

The

board

front

controlling

alarms
depressurization

to

come

the

capacitor.

replace

Unplug
Refer

cabinet

Disconnect

on

Cut

capacitor:

unit

to

covers.

the

capacitor.

the

capacitor

Install
cable

new

ties.
Reconnect
Replace

cabinet

fasteners.

Fan

cooling

air

cooling

to

overheat

replace

Unplug
Refer

front

cooling

unit

to

cover.

Disconnect

terminal.

Remove

11)

that

divider.

Remove
replacement
retaining

When

directional

directed

toward
Reconnect
Replace

cabinet

fasteners.

microcomputer

(7

Fig.

cover

is

the

and

INSTRUCTIONS

in

contact

from

Service

the

two

two

nylon

in

place

capacitor

wires

to

cabinet

fan

(12

flow

fan

fan:

from

Service

the

cooling

the

four

secure

the

defective

fan

screws.
installing

arrow

compressor.

the

quick-connect

the

front

Control

12)

located

responsible

DeVO/MC44.

maintains

with

the

wall

outlet.

Instruction B to

wires

from

cable

and

capacitor

covers

Fig.

for

the

will

and

wal!

ties

remove

and

capacitor.

secure

terminals.

and

secure

11)

provides

compressor.

cause

automatically

outlet.

Instruction B to

fan

quick-connect

retaining

the

in

position

the

on

fan

fan

fan,

the

screws

to

the

and

with

be

sure

side

terminal.

cover

and

secure

Board

control

the

cycle.

on

the

for

monitoring

It

normal

When

board

inside

activates

terminals

open

terminals

holding

with

with

a

A

the

com-

shut

open

(11

Fig.

vertical

secure

of

the

the

four

the

air

the fan

with

or

MC

of

the

and

all

pressure/

a

system

malfunction
alarm
type

system

of

control

indicator

will

come

is

is

failure, a visible

panel

lights

on.

sound.
A

pressure

board

the

accumulator

connected

(1.6

mm)

the

accumulator
accumulator

25.5

transducer

constantly

to

diameter

rise

and

PSI

(176

the

throughout

pressure

KPa)
(approximately
and

purge

valves,
starting a new
pressure
will

16
and
altitude
time.
will
cause

A

minimum

been
cycle
the
cycle
time,
When

reached
will

To

2.

reaches

not

shift.

seconds

complete

and flow

Increases

increase

an

opposite

pre-set

time

alarm

time

the

long

the

the

come

on.

replace

Unplug
Refer

Normally

at 2 LPM

cycle

and

on
does
system

exceeds

pre-set

short

See

MC

unit

to

Service

front cover.

3.

Disconnect
end

of

wire

MC

board

4.

Remove

the

transducer

5.

6.

Remove

secure
remove

Install

using

the

the

the

the

the

four

sensed

activated.

will

illuminate

(8

Fig.

The

audible alarm

(13

senses

tank.

accumulator

hose

fall

of

reaches

the

MC

12-15

VDC)

activating

cycle.

25.5

PS!

for a bed

the

cycle,
rate

in

altitude

time

effect.

maximum

the

MC

not

remain

will

be

the

cycle

alarm

minimum

and

Section

board:

from

wall

Instruction B to

the

terminal

harness

by

pulling

1/16"

(14

Fig.

four

screws

board

MC

board.

new

MC

screws.

by

the

MC

Depending

alarm

12)

on

the

Fig.

12)

oxygen

This

transducer

tank

(14

Fig.

pressure

each

cycle.

approximately

board

to

Until

(176

KPa)

it

takes

but

factors

will

affect

and/or

slightly.

cycle

board.

within

activated.

pre-set

maximum

light

no

cycle

5,

Alarm

outlet.

connectors

(12

Fig.

them

straight

hose

attached

12).
(6

to

the

board

board,

on

and

MC

on

pressure

on

the

the

board

will

the

the
the

unit

red

also

MC

in

is

by a 1/16”

12)

and

senses

within

Once

the

the

sends a signal

the

four-way

them

and

accumulator

the

valves

approximately

to

pressurize

such

as

this

cycle

flow

rate

Decreases

time

if

these

the

If

has

the

will

also

unit

limits,

unit

cycle

will

come

on.

cycle

alarm

time

lights

is

System.

open

at

12)

from

the

out.

to

the

Fig.

12)

that

cabinet

and

secure

and

it

23

10/87

SECTION

7

SERVICE

2.

Refer
front

3.

Disconnect
end

MC

4.

to

5.

secure

6.

7.
transducer

8.

.

Normal!
When

the
following
observed.

cause a deviation
possibly a unit

times.

to

cover.

of

wire

board

Remove

Remove

remove
Install

using

Reconnect

Close
fasteners.

the

transducer

the

the

front

the

the

the
the

Cycling

pressure

test

points

cycling

Most

Service

four

INSTRUCTIONS

the

termina!

harness

by

pulling

1/16”

four

board

MC

board.

new

MC

screws.

the

terminal

hose.

cover

Sequence

test

(Fig.

types

shutdown

Instruction B to

connectors

(12

Fig.

12)

them

straight

(1.6

mm)

hose

(14

Fig.

12).

screws

and

gauges

22)

to

board

secure

of

on

the

the

(6

Fig.

cabinet

and

connectors

with

DeVO/MC44

are

manifold

sequence

of

unit

malfunctions

in

this

sequence

or a change

open

from

out.

attached

12)

that

and

secure

cabinet

attached

should

in

cycle

at

the

it

and

to

the

be

will

and

C.

Left

mately
bed

depressurizes

1.

Four-way

a.

b.

D.

Purging

step

B.

E.

Step

NOTE:

Cycle

seconds

However

will

increase

decreases

seconds

indicator

sieve

bed

26

PSI

The
pressure

No

voltage

of

pilot

way

inated.

action

Ais

repeated

time

for

each

increases

will

shorten

and

light

is

pressurized

(179

KPa))

to 2 PSI

valve

is

deactivated.

pilot

valve

to

four-way.

is

valve

indicator

is

present

again.

is

sieve

in

altitude

cycle

times

cycles.

the

green

is

illuminated.

(approxi-

and

right

(13.8

KPa).

shuts

present

and

light

at

the

green

is

not

as

described

off

terminals

approximately

bed

at 2 LPM.

and

flow

slightly

purge

sieve

pilot

four-

illum-

in

11

rate

and

When

normal
A.

the

cycling

Right

mately

is

depressurized.

1.

Four-way
a.

b. A 12-15

B.

Purging

1.0

seconds)

approximately

1.

Purge
a.

b. A 12-15

concentrator

sequence

sieve

bed

is

26

PS!

(179 KPa))

valve

is

Pilot

pressure

(approximately

KPa)).

VDC
board
pilot

way

Pilot

valve

indicator

action

and

valve

pressure

is

present

is

present

bed

15

PSI

is

activated.

(approximately

KPa)

VDC
board
pilot

is

present

valve

is

turned

should

be

pressurized

and

left

activated.

is

entering
22-28

PS!

signal

at

terminals

and

the

green

light

is

illuminated.

(approximately

pressures

(103 K Pa).

is

entering

22-28

PS!

signal

at

terminals

for

approximately

on,

this

observed.

(approxi-

sieve

bed

four-way

(152-193

from

MC

on

four-

equalize

at

purge

(152-193

from

MC

on

1.0

10/87

24

SECTION

8

PARTS

AND

ILLUSTRATIONS

4

2

Figure

1.

Humidifier

2.

Elastic

1:

DeVO/MC44-90

stand

strap

444-509

2

Figure

Humidifier

1.

2.

3.

お
の

の

NO

2:

On/off

Visible

Audible
front

Control

Flow

Control
Oxygen

Velcro

switch

alarm

cover

meter

strip

alarm

panel

knob

outlet

4

DeVO/MC44-90

Stand

panel

on

label

Removed

(located
MC

board)

fitting

inside

with

MC291-662

MC44D-675

444-576

25

10/87

SECTION

8

PARTS

AND

ILLUSTRATIONS

1

2

3

4

5

6

7

2

4

9

Figure

Humidifier

1.

2.

3.

4.

5.

6.

7.

3:

DeVO/MC44-90

Bottle

Oxygen

Humidifier

Straight

Humidifier

Elastic

Bubble

Oxygen

outlet

adapter

humidifier

stand

strap

humidifier

tubing

fitting

tubing
adapter

with

444-506

444-506

444-509

or

507

Figure

1.

2Amp

2.

Line

cord

3.

Hour

4.

Line

cord

5.

Serial

Gross

6.

7.

Fastener

8.

Wheel

9.

Power

4:

Rear

fuse

meter

strap

number

particle

connector

View

label

filter

assembly

MC441-664

MC291-618

MC291-617

MC29D-657

444-514

444-539

MC29D-610

MC441-660

10/87

26

SECTION

8

PARTS

AND

ILLUSTRATIONS

Figure

Assembly

1.

2.

Gross
Gross

5:

Gross

Being

particle
particle

Particle

Filter

Removed Removed

filter

assembly

filter

444-578
444-514

Figure

1.

2Ampfuse

2.

Serial

3.

Line

cord

4.

Felt

pre-filter

5.

Intake

6:

Filter

number

strap

bacteria

Assembly

label

assembly

filter

MC441-664

MC29D-657

444-577
444-504

27

10/87

SECTION

PARTS

8

AND

ILLUSTRATIONS

Figure

.

Pre-filter

Felt

pre-filter

Pre-filter

Adapter

δω»

intake

Pre-filter

συ

(Includes

7:

Filter

cap

housing

bacteria

assembly

nos.

Assembly

pad

filter

1,

2, 3,

4)

444-503

444-598
444-504
444-577

Figure

1.

Gauge

2.

Straight
Elbow

3.
Humidifier

4.
Fastener

5.
Pressure

6.
5/32”

7.

8:

Accessories

and

hose

assembly

humidifier

humidifier

test

(4mm)

adapter

adapter

assembly

“T"

handle

adapter

tubing

wrench

444-591
444-506

444-507

444-506

444-539
444-502
444-592

or

507

10/87

28

SECTION

8

PARTS

AND

ILLUSTRATIONS

42345

678

44431244

40

9

Figure

Fastener

1.

2.

3.

4.

9:

Front

cover

Back

cover

Fastener

5/32"

"T“

Loosening

handle

wrench

Cabinet

MC44U-620
MC44U-621

444-539

444-592

Figure

Cover

1.

Left

2.

Right

3.

Accumulator

4.

Pressure

5.

Back

6.

Upper

7.

Front

8.

1/4”

9.

MC

10.

1/16”

11.

Cooling

12.

Capacitor

13.

Four-way

14.

Purge

15.

Lower

16.

Connector
(main

10:

Front

Open

molecular

molecular

regulator

cover

wire

harness

cover

(6.4

mm)

board

(1.6

тт)

fan

valve

valve

wire

harness

terminal

wire

harness)

sieve

sieve

tank

1.D.

1.0.

View

bed

bed

hose

Бозе

With

444-518

444-518

MC44D-630

MC29D-612

MC44U-621

MC441-678

MC44U-620

444-525

MC44U-714

444-526

MC291-634

444-543

MC44D-702
MC44D-703

MC441-679

29

10/87

SECTION

8

PARTS

AND

56

18 17

Figure

Covers

11:

Removed

Sieve

bed

Thumb

Left

molecular

Right

molecular

Brass

elbow

#2

hose

1/4”

(6.4

1/8"

(3.2

Accumulator

Pressure

.

Screw

.

Cooling

Purge

valve

Four-way

.

Capacitor

1/2”

(12.7

Бозе

Hose

clamp

Brass

elbow

.

Pilot

valves

.

9Volt

.

Battery

Front

bracket

screw

(top

clamp

mm)

mm)

tank

regulator

(fan)

fan

valve

тт)

(bottom

battery

terminal

sieve

sieve

of

1.D.

I.D.

1.0.

ILLUSTRATIONS

7

8

940

46

View

sieve

hose

hose

reinforced

bed

of

sieve

bed

bed)

With

444-566

bed)

444-548

MC29D-648

444-518
444-518

MC44D-672

444-524
444-525

444-554
MC44D-630
MC29D-612

MC291-634
MC44D-703
MC44D-702

MC441-626

444-549

MC44D-673

or

538

44

Figure

>

PWN

ONAN

.

.
.

ARNO

.

12:

Final

check

#2

hose

clamp

Final

bacteria

Flow

meter
On/off
Screw
MC

Indicator

Fastener
Plastic

Wire
Pressure

board

1/10

1/16”
1/4"

switch

(MC

washer

Amp

harness

transducer

(1.6

(6.4mm)

Inside

valve

filter

board)

lights

fuse

connector

mm)

I.D.

|.D.

Front

hose

hose

43

Cover

444-527
444-524

MC29D-651

MC44D-675

MC291-662

MC441-714

444-539

MC44D-683

444-534

444-526
444-525

12

10/87

SECTION

8

PARTS

AND

ILLUSTRATIONS

Figure
Cover

1.

2.

3.

4.

5.

6.

7.

13:

Rear

Open

Back cover
2Ampfuse
Hour

meter

Connector
(hour

meter)

Compressor

Terminal
Accumulator

block

terminal

tank

View

With

MC44U-621

MC44I-664
MC291-617

MC44U-625

MC44D-630

Figure

14:

Removed

1.

Accumulator

Pressure

N

Terminal

W
PB

Intake
Felt

pre-filter

Intake

Fastener

NU

Compressor
Nylon

&œ

#12

D

Intake

5

(1/2"

—k

Compressor

må

Motor
Compressor

må

Connector

AN

må

(compressor)

Rear

regulator

block

baffle

bacteria

retainer

elbow

hose

clamp

hose

(12.7

mount

View

tank

assembly

filter

intake

mm)

1.D.)

filter

terminal

With

baffle

Covers

MC44D-630
MC29D-612

444-577
444-504

MC29D-668

444-542
444-544
444-538
444-549

MC44D-637

444-581

MC44U-625

31

10/87

SECTION

8

PARTS

AND

ILLUSTRATIONS

5

E
4

3

2

4

Figure

1.

2.

3.

4.

5.

6.

7.

15:

Left

Accumulator

Intake
Fastener

Vertical

Compressor
Motor

Compressor

baffle

retainer

divider

mount

shelf

base

Side

assembly

View

ㆍ

MC29D-668

MC44D-677

444-581

MC441-625

14

Figure

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

mone

16:

Four-way

Allen

head

Purge

valve

Pilot

valve

Pilot

pressure

(1/16”

Access
Oxygen

(from

right

Oxygen
Oxygen

(from

left

#2

Hose

Access

Pilot

valve

Pilot

pressure

(1/16"
Pilot

valve

Manifold

(includes 2 each

Test

position

Test

position

Test

position

Test

position

D

13

Manifold

valve

screws

hose

(1.6

mm)

fitting

fitting

(1.6

and

supply

bed)

outlet
supply

bed)

clamp

and

exhaust

hose

mm)

accessory

for
for
for
for

1.D.)

plug

hose

hose

hose

plug

I.D.)

package

of

nos

voltage

voltage
pilot
pilot

42

Assembly

6,11,12)

at

purge

at

four-way
pressure
pressure

MC44D-702

MC44D-703

444-526

MC44D-706

444-525

444-554
444-525

444-524

MC44D-706

MC44D-706

444-526

MC44D-706

at

four-way

at

purge

10/87

32

SECTION

8

PARTS

AND

ILLUSTRATIONS

Figure

1.

2.

3.

4.

17:

Right

Vertical

Accumulator
Compressor

Exhaustscreen

divider

base

shelf

assembly

Side

View

MC44D-677
MC44D-681

Figure

Voltage

1.

Volt

2.

Volt

A.

Test

18:

Testing

meter
meter

test

position

leads

for

compressor

Compressor

voltage

33

10/87

SECTION

8

PARTS

AND

ILLUSTRATIONS

Figure

Compressor

1.

NOUAWN

19:

Rear

Connector

(compressor)
Cooling

Pressure
Ladder
Compressor
Exhaust
Exhaust

terminal

fan

exhaust

clamp

muffler
muffler

View

Removed

hose

—

filter

assembly
felt

pad

With

aq.

ant

ME291634

444-565

444-566
MC44D-637
MC44D-705
MC44D-704

Figure

20:

Assembly

1.

Manifold

2.

Pilot

pressure

(1/16"

PW

ONAN

(1.6

Pressure

Ladder

Pressure

Exhaust

Plastic

Manifold
(includes
four-way

tee

Removing

base

hose

mm)

!.D.)

inlet

clamp

exhaust

muffler

assembly
base

and

and

purge

hose

assembly

both

valves)

Manifold

MC44D-701

444-526

444-566

444-565
MC44D-705
MC44D-706
MC44D-700

10/87

SECTION

8

PARTS

AND

ILLUSTRATIONS

Figure

1.

2.

3.

21:

Wheel

Motor

Washer

assembly

mount

Bottom

nut

View

MC29D-610

Figure

22:

Pressures

1.

Access

2.

Pressure

3.

Nylon

4.

Pressure

5.

Nylon

6.

Access

7.

Pressure

fittings

test

cable

test

cable

fitting

test

Testing

And

gauges

tie

assembly

wrap

plugs

assembly 444-502

Sieve

Cycle

Bed

Observation

MC44D-706

444-591

MC441-708

444-502

MC44I-709

MC44D-706

35

10/87

SECTION

PARTS

8

AND

ILLUSTRATIONS

Figure

1.

Four-way

2.

Pilot

3.

Pressure

4.

Pilot

(1/16"

5.

Purge

6.

Pilot

7.

Pressure

D.

Test

position

E.

Test

position

23:

Testing

valve

valve

test

pressure

(1.6

mm)

valve

valve

test

3D2

4

assembly

hose

1.D.)

gauge

for

pilot

for

pilot

Pilot

pressure

pressure

Pressure

MC44D-702

MC44D-703

at

four-way

at

purge

444-502

444-526

444-591

Figure

Tank

1.

2.

3.

4.

5.

Е.

24:

Testing

Pressure

Accumulator
Accumulator

Pressure

1/16"

Pressure

Test

test

(1.6

mm)

test

position

tank
fitting

gauge

!.D.

hose

assembly

for

accumulator

Accumulator

MC44D-630

444-582
444-591

444-526

444-502

tank

pressure

10/87

36

SECTION

PARTS

8

AND

ILLUSTRATIONS

Figure

Compressor

Brass

Compressor

Screw

Bwin

Valve

Housing

NAU

Connecting
Brass
Connector

DO

(compressor)

25:

Compressor

elbow

elbow

(pressure

heads

plate

tube

(intake)

terminal

Assembly

exhaust)

MC44U-625
MC44D-673

MC44D-687

Figure

26:

Compressor

Compressor
Pistons

Teflon

Compressor
Gasket
Valve

Reed

Screw

Metal
Nylon

.

Piston

O-ring

.

Screw

.

O-ring
Piston

.

Valve

.

Screw
Metal

.

Reed

.

Gasket

.

Compressor
(Includes 2 each

12,

ring

plate

valve

(reed
retainer
keeper

sleeve

sleeve

plate

(reed

retainer

valve

&4

each

Internal

housing

head

(top

valve)

(bottom

valve)

service

of

Components

view)

view)

kit

of

nos.

no.

7)

of

955-566

5,

37

10/87

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Electrical

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39

Diagram

10/87

UNIT

SPECIFICATIONS

Oxygen

Oxygen

Voltage

Power

Running

Decibel

Dimensions

usage

level

concentrations

outlet

pressure

required

amperage

1

LPM - 95%

2

LPM - 95%

3

LPM - 95%

4

LPM

-92%

5

LPM - 80%

8.5

PSI

(58.6

220 + 10%

390

Watts

1.8

Amps

47

db

maximum

Height - 243”

Width - 17”

Length - 143"

VAC,

Maximum

Maximum

(43.2

+

3%

+

3%

+

3%

+

3%

+

3%

KPa)

(62.4

(37.5

50

cm)

cm)

cm)

Hz

@

@

220

220

VAC,

VAC,

50

50

Hz

Hz

48

Ibs.

(21.7

kg)

9°F

(5°C)

above

220

VAC,

41°F

at

220

Double

Valves - pneumatic

50

(22.7°C)

VAC,

insulated

ambient

Hz

above

50

Hz

Cycling - pressure
Fuse - 2.0

Amp,

250

temperature

ambient

activated

VAC,

time

at

temperature

delay

10/87

40

-

DEALER

DeVOÍMC44

This

Certificate

Oxygen

purchasing

workmanship
of

equipment

Somerset,

from
components
claim
plant

fide

warranty

replacement

other

to

remove
DeVOIMC44,
damage
cost

part(s)

Concentrator

Pennsylvania.

misuse,

under
in

Somerset,

further

is

than

and

of

labor

of

the

OXYGEN

12-MONTH

ON

of

dealer

or

this

instructions

limited

for

as

the

pack
to
incurred

DeVO/MC44.

or

original

and

materials

from

abuse,

failure

warranty,

Pennsylvania.

to

component

herein

warranted.

defective

the

make

shipment

in

The

to

the

CONCENTRATOR

LIMITED

COMPONENT

Warranty

becomes

for a period

DeVilbiss

This

alteration

comply

the

will

option

part(s)

component

removing

for

valid

leasing

warranty

of

with

original

The

be

issued.

of

repairing

of

It

shall

component

part(s)

prepaid.

or

WARRANTY

PARTS

the

specified

and

warrants

dealer

of

Company,

does

the

the

dealer

claim

the

be

replacing

to

12

months

not

DeVOlMC44

operating

must

will

DeVilbiss’

DeVOIMC44

the

part(s)

in a manner

This

warranty

Model

be

free

from
Health
cover

instructions.
notify

be

evaluated

obligation

at

its

plant

that

responsibility

from

does

the

warranted

DeVOIMC44

to

the

from

date

Care

failures

with

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or

is

proven
of

the

to

avoid

not

original

defects

of

receipt

Division,

resulting

improper

To

make

at

and

if

bona

under

supplying

the

specified

cover

component

this

to

dealer

intransit

the

in

¡ts

a

be

There
those
twelve
all

liability
warranties

states

the

above

other

of

merchantability

months

implied

for

do

not

limitation

limitations

This

warranty

rights

is

no

other

from

purchase

warranties

consequential

are

excluded

allow

or

which

limitations

exclusion

or

exclusion

gives

vary

express

and

fitness

and

are

excluded.

and

to

the

or

consequential

may

you

specific legal

from

state

warranty.

for a particular

to

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This

incidental

extent

on

exclusion

how

long

not

apply

to

state.

41

Implied

extent

is

the

damages

an
or
to

rights

warranties,

purpose

permitted

exclusive

under

is

permitted

implied

incidental

you.

and

warranty

you

including

are

limited

by

law

remedy,

any

by

law.

damage,

may

also

any

and

and

and

all

Some

lasts,

so

the

have

to

or

10/87