Ohmeda Tec 4 Vaporizer User manual

AE SERVICES

SECTION 1

STANDARD SERVICE PROCEDURE

REVTSION:- 7

DATE: 14.03.2001

AUTTIORISATION

ЗЕ

Tec 4 Vaporizer Service Manual	Page 1 of	18
Section 1	Revision	7

AE SERVICES

SECTION 1

RVICING

1.Introduction

‘The standard service ola Tec 4 Vaporizer shall consist of the following:

Disassembly of components as required,

Thorough cleaning.

Inspection for damage and wear.

Renewal of Wicks, Seals and damaged or worm components as required.

Lubrication

Tactile Tests.

Checks of the delivered concentration under closely defined conditions and

Te-calibration as necessary.

Unless otherwise stated, the procedures which follow are applicable to all Tec 4 vaporizers.

At cach	stage	of	testing, the operator	shall	record	the	test	results on
Service	Record		AEOF-10.7.1/3 (filled-in		by hand)	and	on	the Test Certificate
generated by		the	lascr reltaciometer	and laptop computer.

CONTROLLED	DOCUMENT
Tee 4 Vaporizer Service Manual	Page 20118
Section	Revision 7

AE	SERVICES
2	SERVICE	PROCEDURES
21	Draining	and	Drying		Out
211	Method 1
ZII	Draining
	a) Drain	alt	the	free	liquid		from	the vaporizer	until only a	very small	amount of
	liquid	can	be	scen	in	the	level	tube. Note.	Draining can	be assisted	by carefully
	tilting	the	vaporizer			slightly forwards,

2112 Drying-Out

a) Mount the vaporizer on the test stand and turn the dial to its maximum setting.

b)	Passa	flow of5 litres/minute air	or	oxygen		through	the	vaporizer for		at Icast one
	hour	until the wicks have dried out.		Lixhaust		to suitable		a gas	scavenging		system
	Alternatively:
a)	Block	the outlet of the vaporizer,	tum the dial to its				maximum		setting	and	connect
	the vaporizer drain to a vacuum		system		(between 10		and	30 litrestminute			negative
	flow)	for one hour until the vaporizer îs			dry.

2.1.2Method 2

	Agent	Recovery		Condensers
FARA!	Draining
	a} Connect		the	vaporizer to	the vacuum	system by inserting drug specific adaplor
	into	the	drain	port of the	keyed filler	assembly and clamping it in position with
	the	clamp screw.

b) Open the drain screw and sct the dial to its maximum mark.

	e)	To	ensure that all liquid is	drained	from	the vaporizer,	«itt	the vaporizer farward
		slightly until liquid can no		longer	be scen	flowing into	the	glass Mask
212	Drying		Out

a) Ensure that the Condenser is switched ‘OFF.

b)Open the drain valve, and drain olf all agent into the appropriately labelled measuring cylinder, Record the quantity of anaesthetic agent recovered on the Condenser Record Form AEOF-10.6.1/1

©). Transfer the agent into the appropriately fabelled brown Winchester bottle for

future purity check. (Refer (0	TEST EQUIPMENT	MANUAL Section 11). Store
the Winchester bottle in the	designated quarantine	arca of the drug cupboard.

Teo 4	Vaporizer Service Manual	[7	ROLLED DOGUNENT—	Page 3 of	7	18
Section	|			Revision

AE SERVICES

ENFLURANF

CONDENSFR

ONLY

Close the valve on the outlet

lo

the

Condenser

and

open

the

drain

valve.

water

Turn

on

the drying-out pump

at

the

time-switch

to

force

any

temaining

out of the

system.

pump, close

the drain

valve, and

open

the

outlet

valve.

‘Tum off

the

drying-out

NOTE:

In

order

to

speed

up

the

Condenser

thawing-out

process,

the heater

switch

may

be

set in the red-light position

ISOFLURANE

CONDENSER

ONLY

Close

“T

the

valve

on

the

outlet

to

the

condenser

and

open

the

drain

valve.

Detach the

pipe

connection

on

the

Condenser

inlet,

and

blow

through

the

Condenser

using an

aitting

gun (0 force out any remaining water

[rom

the

system

Öpen

the

outlet

valve and

re-fit

the

"I"

piece.

d)

Switch

on

the

Condenser

by

turning

the switch to the cooling

position,

to

(the green lamp will be illuminated)and allow a period

of

45

minutes

clapse

in order to permit the correct

operating

temperature

to

be

achieved.

©)

During

drying-out monitor the Condenser pressure gauge.

An

increase

in

pressure

indicates

thal

ice

is

causing

a

restriction to the

gas

low,

and

that

action must be taken to restore the Condenser's optimum operating condition.

£ _If the	specified	pressure is	exceeded, inform the Service/Test Supervisor,
who	will take	the required	action.

2) Recordthe quantity of dricd-out vaporizers on AEQF-10.6.1/1 THEN:-

h) Blankofl'iheinict pori with a plastic plug

i)	Connect		the	vaporizer to the	evacuation	system
	Turn	the	dial	to the maximum	calibration	mark	and allow the vaporizers to
	dry	out as	follows:
				Halothane			40	minutes	Max.
				Enflurane/ Lsofluranc			30	minutes	Max

22

Tec 4 Vaporizer Service Manual	Page 4 of	18
Section	Revision	7

AE SERVICES

23 INSPECTION/CITECK

24

25

2.6

With

the

exception

of the

Serial Number

Label,

located

on

the

rear

face

of

the

Block,

Interlock

Block,

and

the vaporizer type label, on the

font

face

of

the

Interlock

carefully

remove

all

other self adhesivo labels and adhesive residue from the

vaporizer using a cloth moistened

with

Elecsol

ED

or

similar

cleaning agent.

renew

Visually

examine

the

vaporizer

lor

signs

of

external

damage.

Where

necessary,

damaged

or

wom

parts

during

the

service.

and

that

the

vaporizer

locks

Ensure

that

the

Locking

Lever

operates

positively

satisfactorily onto the Selectatec manifold,

DIAL

ASSEMBLY

(Figure

1, Page

8)

Remove

the

self

adhesive

Dial

Cover

Label

from

the

Dial

Loosen

the three cheese-head screws (M3) which secure the Dial and remove the dial

Assembly.

Inspect

the Clicker

Plungers

and

Springs

and

also

the

locking

catch

mechanism.

Renew

any parts which arc damaged

or

worn

DP

CONTROL

(Figure

2,

Page

8)

Check

the

nylon

Stop

Control

for

damage

and wear

and

if necessary

replace

NOTE:

If the

stop

contro!

has

to be

replaced,

the

position

of

the

edge of

the

stop

at

the

maximum

dial

setting

may

have

to

he

a

adjusted

by culling

or

filing

the

stop

so

that

the

dial

can

reach

the maximum

graduation

on

the

dial

REMOVING/REPLACING

A

ROTARY

(Figure

3, Page

9 and

10)

Figures

4

&

5,

Page

Remove

the

Locking

Lever

serew

(M3),

the

Locking

Lever

and

the

Spindle

Bush.

Peel-off

the

self

adhesive

Label

from the interlock Block to expose

the

heads of the

hexagon

socket

head

screws

(M4).

Remove

the

two

Pozi

head

serews

and

Top

Cover

Plate.

completely

the

two

Pozi

head

screws

and

lift

out

the

Pivot

Ann/Platform

Unscrew

Assembly.

It may

be

necessary

to

lever

out

these

assemblies

but

care

must

be

taken

not

to

damage

the black anodizing of the interlock Block.

Carefully

remove

the

Woodruff

Key and put to one side for later

use.

uses a

separate

Note.

There

are

two designs

of

Rotary

Valve

in

use.

The

earlier

one

Woodrult

Key

and

the

later

one

has

an

integral

key.

Clamp

Tabs.

Unscrew

and

remove

the

three

M3

clamp

screws

and

Unscrew

the

four

MS

and

the

two

M4

serews

that

secure

the

Interlock

Biock.

Lift

off

the Interlock Block, leaving the Rotary Valve, Washers

and

Compression

Spring

in

place

Cam

and

Retaining

Ring

from

the

Block,

lifting over

the

Spirol

Remove

the

Pivot

of

Pins,

Remove

and

discard

the

black

rubber

Distributor

Seal

from

the

bore

the

Interlock

it

Block.

to

fit

a

new

Serial

Plate,

the

Interlock

Block

should

be drilled

Note.

If

is

necessary

at this

point.

Tec 4 Vaporizer Service Manual	[CONTROLLED DOCUMENT	1	Page 5 of	18
Section 1	——		Revision	7

AE SERVICES

b)

Carefully

bft

the

Rotary

Valve

off

the

Sump

Cover

and

remove

and

place

lo

one

side

the Thrust Washer(Thick), Spring and Thrust Washer( hin).

NOTE:

The

Rotary

Valve

and

Sump

Cover are

very

important

precision

components

and great care must be taken not lo

damage

them

when

they

are being

worked

on

or

handled.

¢)

Inspect

and

clean

the

Rotary

Valve

and

Sump

Cover

checking

for

damage.

Clean

the

Rotary

Valve

by

wiping

with

a

soft

cloth moistened with Elecsol FD,

taking

particular

care

not

to

damage

the

lower

face,

then

polish

with

a

clean,

dry

cloth,

NOTE.

The

Rotary

Valve

must

not

be

soaked

in

L'lecsol

FD.

Any

marks

or

dirt

on the

surface of

the

Valve,

which are not easily removed by

wiping,

should

be

removed

by

gently rubbing

with

‘Duraglit’ Silver Polish Wadding

and

then

wiped

with

a

soft

cloth

moistened

with

Flecsol

FD,

Finally,

il

should

be polished

with

a

clean,

dry

cloth

Materials

ofa

more

abrasive

nalure must net be used.

d)

Thoroughly

clean

the

Sump

Cover

with

a

sofi

cloth moistencd with Eleesol FD

taking

care

nat

to

scratch

or

damage

the

main

sealing

face.

Then

polish

with

a

clean

dry cloth

e)

Before

fitting the Rotary Valve, write the Valve Pressure Reading,

if available,

on

the

Service

Record,

1)

Very

carefully

place

the

Rotary

Valve

on

the

Sump

Cover

with

the

key

or

keyway

positioned

to the

right

when

viewed

[rom

the

frant

of the

vaporizer.

£)

Inspect

the thinmer Thrust Washer and also

the

thicker

Thrust

Washer

and

replace

as

necessary

ie.

if damaged

or

wom.

h)

Place the

thinner

Thrust

Washer

over

the

stem of the

Valve,

followed

by

the

Spring

and

then

the

thicker

Thrust

Washer.

1)

‘Take

anew

Distributor

‘U’

Seal, lubricate with ‘Fomblin’ UTI8

gecasc,

fit

to

the

special

fitting

siceve

and

place

the

sleeve

over

the

valve

stem.

j)

Check

that the PTFE O-Ring

is

fitted

to

the Interlock

Block

then

position

the

Block

over

the

fitting

sleeve

with

the

pointer

to

the

front

k)

Čarefully

press

downwards

on the Interlock Block and

hold

it

in

place

whilst

fitting

and

fully

lightening

the

six

(

Four

MS

and

two

M4)

retaining

screws

‘Tec 4 Vaporizer Service Manual	Page 6 of	7	18
Section |	Revision

AE SERVICES

1) Ensure

that

there

is sufficient Fomblin UT18

grease

on

the Slip

Ring

and

replace.

Grease

the

Pivot

Cam as required with Fomblin UTI8

grease

and then

fit

over

the

Rotary

Valve spindle into the Interlock Block.

Ensure

that the

retaining Ring is

adequately lubricated with Fomblin UTI8 grease and

fit

into

the

Interlock

Black.

Secure

the Retaining Ring with the three M3

screws

and

Clamp

Tabs,

carefully

and

evenly

tightening

down

in position.

Tin-up

keyways

in Cam

and Rotary Valve then fit the

Woodrull

Key

m)Fnsute thal there is sufficient Fomblin UT18 grease on the Platform and Pivot Arm assemblies and re-fit the Interlock assembly.

Secure the assemblies with two M4 screws, tightening down in position but ensuring that there is minimum clcarance belween the Pivot Bearings and Pivot Arm.

n) Check that Spring is in position then re-fil Stop Release Button. Check that Clicker Plungers and Springs are in position and re-fit the Dial Assembly, sccuring with three

M3 screws.

0) Install	the	Lop	Cover Plate,	securing	with	two	M4	screws, Install		the	Lock/Unlock
Knob Bush on the Locking Lever Spindle.
Install the Lock/Unlock Knob and sceure						with	one	M3	screw.
Note	that	the	Lock/Untock	Label may	be	fitted	after the		inal Test	ai	the Final

Inspection stage.

‘Tee 4 Vaporizer Service Manual}	Page 7 of		18
Section 1	Revision	7

AE SERVICES

Figure 1 Dial

Assembly

		Figure 2 Dial	and Stop Control
Tec 4 Vaporizer Service Manual	|	CONTROLLED DOCUMENT	Page 8 of	7	18
Section I			Revision

AE SERVICES

.	E	+

n

i

na

Figure 3 Mechanism

Tec 4	Vaporizer Service Manual	| CONTROLUFO DOCUMENT";	Page 9 of	7	18
Section	|		Revision

AE SERVICES

Figure 4 Rotary Vaive

i fa

|

	Figure	5 Pivot Cam
Tec 4 Vaporizer Service Manual	[CONTROLLED DOCUMENT |	Page 10	of 18
Section 1		Revision	7

AE SERVICES

27SUMP ASSEMBLY (Figure 6, Page 13)

NOTE. The vaporizer shall have been drained, dried-out and Max. tested prior to the commencement of this operation.

a)

b)

©)

d)

Remove the self-adhesive Keyed

I'iller label

and unscrew

the

two

M3

scrows

that

which

retain

the

filler.

Tfa

keyed

filler

is

fitted,

cure

must

be

taken

to

ensure

the killer

Ball

is

not

misplaced

place

to

one side.

Remove the Filler Assembly and

Invort the

vaporizer.

Remove

{he

four

MS

Pozi

screws

and

remove

the

Outer

to

Cover

Base

and

Heat

Pad

then

lift off

the

Outer

Cover.

Place

all components

one side for subsequent use.

Cutand

remove

the

Tess

tape

to

release the

Support

Plate.

Discard

the

old Tesa

Tape.

Unscrew

and

remove

the

four

Sump Studs

and

Washers.

Assembly.

Lift off

the

Sump

Assembly with

O-Ring.

Lift off the Outor Wick

Renew

the

Outer

Wick,

securing

with

cotton

twine,

28 SUMP AND WICKS (Figure 6, Page 13 and Figure 7, Page 14)

2.8.1Disassembly

a)

Remove

the

self-adhesive

label

from

the

Filler.

b)

Unscrew

the

two

M4

x

35

Socket Cap Screws which secure the Filler Body

Assembly

to

the

Sump,

remove

the

Filler

Body

and the

two

PTFE

seals,

Note:

On the

Keyed

Filler,

a

4

mm

Nylon

Ball

is

located

between

the

Filler

Body

and

the

Sump,

When

removing

the

Filler

Body,

take care

not

to

lose

the

Ball

©)

Slacken

the

three

M4

x

6

Texagon

Socket

Set

Screws

which

are

used

to

lift

the

Heat

Pad

up

to

the

Sump

Base.

d)

Unscrew

and

remove

the

four

MS

x

16

Pozi

Pan

Head

Screws in

the

Outlet

Cover

Base

and

remove

(he

Base

and

the Tleat

Pad.

e)

Slide

off

the

Outer

Cover,

©

Remove

the

Support

Plate

(if

fitted)

which

is

secured

to

the

Sump

Studs

by

adhesive

tape.

Check

that

the

two

Sump

Studs

at

the

rear

of

the

unit

are

of the

‘waisted’

type.

If

nol,

dispose

of

them

and

fit

the

latest type

during

re-assembly.

2)

Remove

and dispose of the Wicks.

i)

The

Outer

Wick

is

attached

with

thread

to

the

Spiral

Support.

The inner

Wick

is

attached

with

thread

to

the

Inner

Wick

Support

Asscmbly.

ii)

Unscrew

the

two

M3

x

5

Pozidrive

Screws

and remove the Non-Spill Cup.

The Non-Spill Cup Wick

is

attached

with

thread

Tec 4 Vaporizer

Service

Manual

Page

11

of 18

Section 1

Revision

7

AE SERVICES

h)

Remove

the

four

M4 x

10

Cheese

lead

Screws and

remove

the

Inner

Wick

Support

Assembly

complete

with

Thermostat

Cover

Assembly.

Clean

the

external

surfaces

with

Elecsol

ED

or

similar cleaning

agent

i)

Note:

‘This next

procedure

only

needs to

be

carried

out

if

the

vaporizer

has not

been

serviced

in

the past

three

years.

i)

Inspectthe

Thermostat

for

signs of

corrosion

and

damage.

ii)

Clean

the

‘Thermostat

by

blowing

through

with

clean

compressed

air at

210 kPa (30 psi) maximum.

iii)

Check

the

Thermostal

restriction

as

detailed

in

Section

XX.

iv) Fita new O-Ring to the Sump Cover face.

у)	Refît	{he	Thermostat		and	secure	with	two	MS x 16 Screws and spring
	Washers,		Fnsure	that	the	screws	are	fully	tightened.
) Kit	three new	O-Rings to		the	Inner Wick		Support		Assembly, then refit the
Assembly.

2.8.2Assembly

a) Fit	the Inner	Wick onto the Inner Wick	Support	Assembly, ensuring	that the cut-
aut	holes are	aligned with the holes in	the rivets.	Secure with cotton	thread.

b) Lay the Non-Spill Cup Wick across the Cup and secure with cotton thread, Fit the

Non-Spili Cup into the Ballle and secure with two M3 x 5 Pozi-Drive Screws.

«)

Fit

the

Outer

Wick

onto the Wick Support and secure with cotton thread.

d)

Fil

the

Outer

Wick

Support over the Inner wick Assembly.

Note:

This

may

be

made

casier

by

first

wrapping a thin film of plastic, for

example

Mylar,

around

the Inner

Wick

Assembly

to

form

a

sleeve,

then sliding

the

the

Spiral

Wick

Assembly

over

the

siceve

onto the Support and

then

withdrawing

the

sleeve. A

paper

sleeve

may

be

used

instead

of plastic

but care

must be

taken

to ensure that the paper does

not tear when the paper

is

withdrawn

leaving

paper

sandwiched

between

the

Wick

and

the

Spiral.

283

Sump

Cleaning

Clean

the

inside of the

Sump

using

Llecsol

FD

or

a

similar a

cleaning

agent

284

Final

Fita

Locking

washer to

cach

Hexagon

Stud

as illustrated (sce Figure XX).

to

Fit a

new

O-Ring

to

the

Sump

Assembly. Attach

and

secure

the

Sump

Assembly

lie

the

Sump

Cover

using

the

four Hexagonal

Studs, ensuring that no strands of wick

across

the

O-Ring

located

between

the

Sump Cover

and

the

Sump.

Tec 4 Vaporizer Service Manual	Page 12	of 18
Section 1	Revision	7

AE SERVICES

‘Tec 4	Vaporizer Service Manual	i	R	al	Page 13	of 18
Section	|				Revision	7

AE SERVICES

NOLL.	The knot	must	be	outside of the Inner Wick	and	in a	position where
the transfer holes		are	not	obstructed, Tt must also be	ofa	size	which does not
restrict	fitting of the Spiral			Wick Assembly.
				Figure	7 Wick		Renewat

‘Tec 4	Vaporizer Service Manual	μα	DOCUMENT	Page 14	of 18
Section	I			Revision	7

AE SERVICES

29 THERMOSTAT

dì

e)

8)

N.B.

This

procedure

needs only to be performed

if the

thermostat

is

found

to be

in

need of adjustment during calibration.

Unscrew

the

four

M4

slotted

head

screws

which

secure

the

Inner Wick

Assembly

and lift off the assembly together

with

the

three

O-Rings,

Place

to

one

side

for

subsequent

use.

Obtain

a

replacement

Thermostat

of

the

correct

type and record the number

of

the

new

thermostat

on

the

test

sheet.

Staple

the thermostat

test

record

to

the

vaporizer

test

sheet.

Secure

the

thermostat

to

the

Sump

Cover

using

the

two

M5

Pozi

screws

and

washers.

Secure

the

Inner

Wick

Assembly

to

the

Sump

Cover

using

the [Dur

M4

slotted

head

screws,

ensuring

that

the

three

O-Rings

are

in place

and

that

the Wick

is

correctly

orientated.

Invert

the

vaporizer.

round

the

Inncr

Wick

Assembly

and

slide

the

Spiral

Wrap greaseproof paper

Wick Support into position over the Inner Wick,

ensuring that the paper has not

become

tom

and

that

the

Inner

is

Wick

is

not

crumpled

into

the

spiral.

Note

that

the

leg

of

the

Spiral

positioned

at

the

bottom of the

Sump

Fit

the

Sump

Assembly

over

the

Wick

Assembly

ensuring that the Sump O-Ring

is

in

place.

Secure

the

Sump to the Sump Cover

with

the

four

Sump

Studs

Secure

the

Support

Plate

in

position

on

the

Sump

Studs

with

Tesa

Tape

adhering

to

the

sides

of the

Sump.

Fit

the

Outer

Cover

over

the

Sump

Studs.

Sump

Assembly.

Fit

the

Outer

Cover

Position

the

Heat

Pad

on

the

base

of

the

Base

into

position

on

the

Outer

Cover

and

secure

to

the

Sump

Studs

with

the four

M5 Pozi Pan Head screws.

Sump

with

the

three M4

Grub

screws

in

the

Outer

Secure

the

leat

Pad

to the

Cover

Base

CONTROLLED	DOCUMENT
Tec 4 Vaporizer Service Manual	Page 15	of 18
Section 1	Revision	7