gas type DATSUN 210 1979 User Guide

Remove

snap
ring
CD
and
lock
bolt

@
and
the

following

parts
can
be

detached
from
heat

control
valve

shaft

Key

ID

Counterweight

@

Thermostat

spring

@

Coil

spring

@

Note
As

previously
descnbed

heat

control

valve

j
is

welded

to
valve

shaft

@
at

exhaust
manifold

and

cannot
be
disassembled

To
install

reverse
the
removal

procedure

INSPECTION

1
With

engine
stopped
visually

check
the

quick
heat
manifold

system

for
the

following
items

I
Check
heat
control
valve
for

malfunction
due

to
break
of

key
that

locates

counterweight
to
valve
shaft

2
Rotate
heat
control
valve
shaft

with

fingers
and
check
for

binding

between
shaft
and

bushing
in

closing

and

opening
operation
of

heat
control

valve
If

any
binding
is
felt
in

rotating

operation
move
valve
shaft
in
the

rotation

direction
several
times
If
this

operation
does
not
correct

binding

condition
it
is

due
to
seizure
between

shaft
and

bushing
and
exhaust
mani

fold
should

be

replaced
as
an

assem

bly
Emission
Control

System

Counterweight

Heat
control
valve

Stopper
pin

EC249

Fig
EC
IO

Checking
Heat
Control

Valve
Movement

2
Run

engine
and

visually
check

counterweight
to
see
if
it

operates

properly

I
When

engine
speed
is
increased

discharge

pressure
of

exhaust

gases

causes

counterweight
to

move

down

ward

clockwise

2
For

some
time

after

starting

engine
in

cold
weather

counterweight

turns
counterclockwise
until
it

comes

into

contact
with

stopper
pin
installed

to

exhaust
manifold

EC
9
Counterweight
gradually
moves

down

clockwise
as

engine
warms

up

and
ambient

temperature
goes
higher

around
exhaust
manifold

If
it
does
not
move
at
all
check

and

replace
thermostat

spring

AIR

INJECTION

SYSTEM
A

I
S

DESCRIPTION

The
Air

Injection
System
A
I
S

is

adopted
on
U
S
A

models

except
FU

models

and

injects
compressed
air

secondary
air

coming
from
the
air

pump
into

the
exhaust

port
of
the

cylinder
head
to
reduce

hydrocarbons

He
and

carbon

monoxide
CO
in

exhaust

gas
through
recombustion

There

are
two

types
of
Air

Injection

System

Fresh
outside
air
is
drawn

by
the
air

pump
through
the

air

pump
air

cleaner

Compressed
air
is

injected
into

the

exhaust

manifold

through
the

check
valve

The
A
B

valve

supplies
air
from
the

carburetor
air
cleaner
to
the

intake

manifold

so
as

to

prevent
after

fire

during
deceleration

The
amount

of

injected
air
is
con

trolled

by
C
A

C
valve

California

models
or
air

relief
valve

Non

California
models

Note
When
tho
vaCUUm
hose

is
dis

connected

plug
it

up
or

engine
will

stumble

EC
47A

FiJ
Fig
EC
49

Disconnecting
Vacuum

Hose

from
C
A

C
Valve

5

Connect

hand
operated
vacuum

pump
in

place
and

manipulate
it
in

order

to

apply
a

pressure
of
2oo
to

250

mmHg
7
87

to
9
84

inHg

to

C
A
C

valve
Increase

engine
speed

to
3
000

rpm
and
confIrm
that

no
air

leaks
from
C

J
C
valve

Fig
EC

50

Checking
C
A
C

Valve

1

6
With
the
above

condition
discon

nect
air
hose
at
check
valve
and

plug
it

up
At
this

point
confirm

the
air

leaks

from

C
A

C
valve

ECl48A

Fig
EC

51

Checking
C
A
C
Volve
2
Emission

Control

System

7
If

teshesults

satisfy
3
4
5

and
6

the
C
A
C
valve

is

properly
function

ing

AIR
INDUCTION

SYSTEM
A
I
S

DESCRIPTION

The
air

induction

system
A
1
s
is

adopted
on
the
FU
model
and
Canada

models
and
is

designed
to
send
see

ondary
air
to
the

exhaust
tube
utiliz

ing
a
vacuum
caused

by
exhaust

pulsa

tion
in
the

exhaust
tube

Air
inductIon
valve

A
reed

valve

type
check
valve
is

installed
in

the
air

cleaner
When
the

exhaust

pressure
is
below

atmospheric

pressure

negative
pressure

secondary

air

is
sent
to
the
exhaust
manifold

When
the
exhaust

pressure
is

above

atmospheric
pressure
the

reed
valve

prevents

secondary
air

from

being
sent

back
to
the
air
cleaner

EC
t8
The

exhaust

pressure
in

the
exhaust

tube

usually
pulsates
in

response
to

the

opening
and

closing
of

the
exhaust

valve
and

it
decreases

below
atmos

pheric
pressure
periodically

If
a

secondary
air
intake
is

opened

to
the

atmosphere
under

vacuum
con

ditions

secondary
air

can
be

drawn

into

the
exhaust
tube
in

proportion
to

the
vacuum

Therefore
the
air
induction

system

A
I
s
reduces
CO

and
HC
emissions

in

exhaust

gases

operatiug
the
same
as

the
air

injection

system
A
I
s
The

system
cpnsistsof
an
air

in

tJctio

valve

a
filter
an

A
B
valve

and
hoses

fl

V

t

5

1

Air

ind9ction
valve

2
Air

c
eancr

3
Carburetor

4

Exhaust
manifold

5

Anti
obRcldlre
valve

EC919

Fig
EC
52

Ai
Induction

SYltem

1

Reed
valvo

2

Stopper

EC920

Fig
EC

53
Air
Induction

Val

Emission
Control

System

EXHAUST
GAS

RECIRCULATION

E
G
R
CONTROL

SYSTEM

DESCRIPTION
to
lower
the

spark
flame

temperature

during
combustion
This
results

in
a

reduction
of
the

nitrogen
oxide

NOx

content
in
the
exhaust

gas

When

the
E

G
R
control
valve

is

open
some
of
the
exhaust

gas
is
led
from
the

exhaust
manifold
to
the

E
G

R

chamber

through
the
E

G
R

passage
The

exhaust

gas
is

then
con

trolled
in

quantity
by
the
E

G
R

valve
and

is
introduced
into
the
intake

manifold

In

the
exhaust

gas
recirculation

system
a

part
of
the

exhaust

gas
is

returned
to

the
combustion

chamber

U
S
A

models

c

r

i

From
carburetor

EC309A

1
E
G
R
thermal
vacuum
valve

2
E

G
R
control

valve

3
Carburetor

4
E
G
R

passage

5
Intake
manifold
6
Exhaust
manifold

7

E
G
R

tube

8
Orifice

9
B
P
T
tube

10

B
P
T

valve

Canada
models

CD

o

1

Thermal
vacuum

valve

2
E
C
R
control
valve

3
Carburetor

4

E
C
R

passage
5
Intake
manifold

6
Exhaust
manifold

7

E
G
R

tube
Thermal
vacuum

valve

3
port
type
T
V
V

Thermal
vacuum
valve

2
port
type
T
V
V
for
FU
model
E
G
R
tube

E

G
R

control
valve

4

Thermal
vacuum
valve

2

port
type
T
V
v

E
G
R
tube

EC155A

Fig
EC
63
E
G

R

System

EC
21

Emission
Control

System

ATloN

The

operation
of
the
E

G
R

system
is

as
follows

U

S
A

models

Except
FU
model

Thermal

Water

temperature
Oc
OF

vacuum
valve
B
P
T
valve

Exhaust

pressure
mmH20
inH20
E
G
R

system

Below

SO
to

63

I22
to
145
Open
Exhaust

pressure

Below
21

to
33
0
82
to
1
30
Open

Not

actuated

Above

21
to

33
0
82
to

1
30
Closed

Exhaust

pressure

Open
Not
actuated

Aliove

Closed
Below
21
to
33

0
82
to
1
30

SO
to

63

I
22

to
145

Above
21
to
33

0
82

to
130
Closed

Actuated

FU
model

Water

temperature
Oc
F
Thermal
B

P
T
valve

E
G
R

system

vacuum
valve

Exhaust

pressure

mmH20
inH2O

Below
Below
21
to
33
0
82
to

1
30

Open

Closed
Not
actuated

40
to
63
104
to
145

Above
2
to

33
0
82
to
1
30
Closed

Above
Below
21

to
33

0
82
to
1
30

Open
Not
actuated

40
to
63
104
to
145
Open

Above
21
to

33
0
82
to
1
30
Closed
Actuated

Canada
models

Water

temperature
Oc
OF
Thermal

vacuum
valve
E

G
R

system

Below
40

to
63

I04
to
145

Closed

Not
actuated

Above
40
to
63

I04
to
145

Open
Actuated

E
G
R
control
valve

The
E

G
R
control

valve

controls

the

quantity
of
exhaust

gas
to
be
led

to
the
intake

manifold

through
vertical

movement
of
the

taper
valve
con

nected
to
the

diaphragm
to
which
vacuum
is

applied
in

response
to
the

opening
of

the
carburetor
throttle

valve

E
G
R

control
valve
construction

and

type
vary
with

transmission

type
and
car
destination
For
identification

purposes
the

part
number

is

stamped

on
the
recessed

portion
at
the

top
of

the
valve

EC22

1l

I

I

1J

1

Diaphragm
spring

2

Diapliragm

3
Valve
shaft

4
Valve

5
ValVe

seat

6
Valve
chamber

EC231

Fig
EC
64
E
G
R
Control
Value

Thermal
vacuum
valve

2

port

type

FU
and
Canada
models

The
2

port

type
thermal
vacuum

valve
is
mounted
on
the

engine

thermostat

housing
It

detects

engine

coolant

temperature
by
means
of
a

built
in

bi
metal
and

opens
or
closes

the
vacuum

passage
in
the

thermal

vacuum
valve

When
the
vacuum

passage
is

open

the

carburetor
vacuum

signal
is

applied

to
the

diaphragm
of
the
E
G
R
con

trol

valve
to
actuate
the

taper
valve

connected
to
the

diaphragm

1

Spring

2

Bi
metal

3
O

ring

EC232

Fig
EC
65
Thermal
Vacuum
Valve

2

port
type
Emission
Control

System

Thermal
vacuum
valve

3

port
type

U
S
A
models

except

FU

model

The
3

port
type
thermal

vacuum

valve
is
located

on
the
rear

end
of
the

cylinder
head

It

defects

engine
coolant

tempera

ture

by
means
of
wax

expansion
and

opens
or
closes
the
air

passage
from

the
air

cleaner

When

the
air

passage
is
closed
the

carburetor
vacuum
signal
is

applied
to

the

diaphragm
of
the
E
G
R

control

valve
to
actuate
the

taper
valve
con

nected
to
the

diaphragm
This
valve
is

also
co
used
as
a

component
for
the

Spark
Timing
Control

System

JiI2
To
air
cleaner

From
B
P
T

valve

From
distributor

EC156A

Fig
EC
66
Thermal
Vacuum
Valve

3

port
type

B
P
T
valve

The
B
P

T
valve
monitors
exhaust

pressure
to
activate
the

diaphragm

controlling
intake

manifold
vacuum

applied
to
the
E
G
R

control
vaNe
In

other
words
the

amount
of
recirculat

ed
exhaust

gas
vari

s
with
the

position

of
the
E
G
R

valve

regulated
by
the

operating
condition
of
the

engine

EC
23
To
E

G
R

control
valve
Vacuum
nal
Curce

Air
bleed
1

Exhaust

pressure

EC310A

Fig
EC
67
B
P
T
Value

REMOVAL
AND

INSTALLATION

E
G
R
control
valve

I
Disconnect

vacuum
hose
and
re

move
nuts

securing
E
G
R

control

valve
to
E

G
R

passage
The
E

G
R

control
valve

can
then
be
taken
out

Fig
EC

68

Remouing
E
G
R

Control
Valve

CAUTION

Pay
attention

not
to

give
damage
to

packing
of
E
G
R

control
valve

2

Installation
is
in

the
reverse
se

quence
of
removal

Note
In

installing
new
E
G
R

control

valve
confirm
that

the
model

num

ber
and

identification
marks
at

the

top
of
valve
are

as
follows

E
G
R
passage
arid
taibe

I

E
G
R

tube
can
be
removed

by

loosening

securing
nuts

2

Disconnect

blow

by
gas
hose
and

remove

securing
bolts
and

nuts
E

G
R

passage
can

then
be
taken

out

3

Installation
is
in
the

reverse
se

quence
of
removal

EC158A

Fig
EC
S9

Removing
E
G
R

Passage

Note

New

gasket
should

be
used
in

installing
E

G
R

passage

Thermal
vacuum
valve

The
thermal

vacuum
valve
is

made

of

plastic

Consequently
pay
attention

not
to

give
damage
to
it

On
U
s
A

models

except
for

the

FU

model
the
3

port
type
thermal

vacuum

valve
is
located
on
the

rear

end

of
the

cylinder
head

On
Canada
and

FU
mode
the

valve
is

located
on

the
front
end
of
the

cylinder
head
Emission

Corltr
ol

System

I
Drain

engine
coolant
about
one

liter

I
US

qt
Imp
qt

2

Remove
manifold
nut

securing

heat

shield

plate

I
I

LIkat
shield

plate

EC170A

Fig
EC

70

Removing
Heat
Shield

Plate

3
Disconnect
two

vacuum
hoses

and
unscrew
the
thermal
vacuum

valve
The
valve

can
then
be
taken
out

4

Installation
is
in
the

reverse
se

quence
of
removal

Note

a

Be
sure
to

apply
sealer
to
threads
of

the
valve

prior
to

installing
new

wive

b
When

installing
new

thermal
vacu

um
wive
make

sure
it
is

black

t
J

Tightening
torque

Thermal

vacuum
valve

Less
than

2
2

kg
m
16
ft
b

Manifold
nut

1
5
to

2
0

kg
m

11

to
14
ft
b

EC
24
2

port

type

3
port

type

Fig
EC
71

Removing
Thermal

Vacuum
Valve

B
P
T
valve

I

Remove

vacuum
tube
on
the

B
P
T

valve

2

Remove

screws

securing
B
P
T

valve
to

bracket

3
Disconnect
back

pressure
tube

from

B
P
T
valve

The
B
P
T

valve
can
then
be

taken

out

EC770

Fig
EC

72

Removing
B
P

T
S

curing

Screws

4

Installation

is
in

the
reverse
se

quence
of

removal

Note
In

replacing
the
B
P
T

valve

with

new
one
h
that
the

type
number
on

new

part
is
the

same
85
that
on
former

one

I

AA552

Fig
RA
18
Shock
A
bllOrber

Upper

End

2

Remove
bolt

securing
shock

ab

sorber
lower
end

and
remove
shock

absorber

Note
When

removing
shock
ebsorber

lower
end
from
bracket

Iueeze

shock

absorber
end
lift
it

out

right

aJ
o
J
to
accommodate

emb
ss

ment

inside
bracket

c

RA486

Fig
RA
19
Shock
Absorber

Lower

End
Brocket

Inspection

I

Test
shock
absorber
and

compare

with

specification

given
in

Service

Data
and

Specifications
Replace
if

nece

ry

2

Check
for
cracks

Also
check

pis

ton
rod
for

straightness

3
Check

all
rubber

parts
for
wear

cracks

damage
or

deformation
Re

place
if

necessary

Installation

Install
shock
absorber
in
the
reverse

order
of
removal

Note

Tighten
shock

absorber

upper

end
nut
to

specification
until
it
is

fully

tightened
to
thread
end
of

pis

ton
rod

Then

securely

tighten
lock

nut
Rear
Axle
Rear

Suspension

@
Tightening
tonlU1l

Shock
absorber

upper
end
nut

1
5

to
2
0

kg
m

11
to
14
ft
b

Shock
absorber
lower

end

n1
t

7
0
to
8
0

k
l
m

51
to
58

ft
bl

CAUTION

I
Be
careful
not
to

damage
or
bend

piston
rod

during
operation

b
Do

not

open
or
heat

gas
filled

type

shock
absorbers

COIL
SPRING

Removal

Block
front
wheels
with

chocks

2
Raise

rear
of
car

high
enough
to

permit

working
underneath
and

place

stands

solidly
under

body
member

on
both
sides

3

Support
under
center
of
dif

ferential
carrier
with

a

garage
jack

4
Remove

rear
wheels

5

Remove
bolts

securing
shock

absorber
lower
ends
on
each
side

C
J

1
v

I
JJJ

RA485

Fig
RA
20

RemoviTIII
Bolt

Securing

Shock

Abwrber
Lower
End

6
Lower

jack
slowly
and
remove

coil

springs
on
each
side
after

they

are

fully
extended

RA546

Fig
RA
21

Removing
Coil

Spring

RA
6
Inspection

1

Check
coil

spring
for

yield
defor

mation
or

cracks

2
Test

spring
and

compare
with

specifications
given
in
Service
Data

and

Specifications

3

Check
all
rubber

parts
for
wear

cracks

damage
or
deformation

Re

place
if

necessary

InsteDatlon

Install
coil

spring
in

the
reverse

order
ofremoval

CAUTION

Correctly
fit

open
end
on

spring
seat

CD
Tightening

torque

Shock
absorber
lowel
end
nut

7

010
8
0

kg

51

to
58
ft
b

LINK

ASSEMBLY

Removal

It
is

possible
to

remove
one
link

assembly
alone
When

removing
more

than

two
link

assemblies
remove
axle

assembly
first
Refer
to

Rear
Axle

Assembly
for
removal

Remove

upper
link
or
lower

link

alone

by

removing
bolt

on
each

end

Fig
RA
22

Removing
Upper
Link

RA553

Fig
RA
23

Remouing
Lower
Link

DESCRIPTION

The
front
and

rear
bumpers
consist

essentially
of

a
center

bumper
two

side

bumpers
and
two
shock
absorbers

The

bumper
is

attached
to
the
side

member

through
a

gas
filled
strut

type
shock
absorber
at
each
end
to

effectively
absorb
the

energy
of
a

collision

upon
ilnpact

The
side

bumper
is
constructed

with

a
steel
insert

panel
and

porous

urethane
rubber
The
urethane
rubber

FRONT

BUMPER

I
I
Body

BUMPER

section
reduces
to
a
nummum
the

possibility
of

damaging
the
car

body

when
the

bumper
is

involved
in

a

collision

CAUTION

The
shock

ebsorber
is
filled
with
a

high

pressure
gn
and
should
not
be

disassembled
drilled
or

exposed
to
In

open
flame
CAUTION

LABEL

Pasted

on
shock
absorbers

x
DANGER

i

t

e

e

e

t

I
Contents
under

pressure
Don
t
take

apart
puncture

apply
heat
or
fira

3S
mm

1
38
in

BF
5
1
Front

center

bumper

2

Over
rider

3
Side

bumper

4

Bumper
mounting
bracket

5

Center
bumper
brace

6

Bumper
rainforce

7

Sight
shield

8
Shock
absorber

9

Bumper
attaching
bolt

BF738B

Fig
BF
5
Front

Bumper

4

Wfefrlgerant

charging
speed
slows

down

charge
it
while

running
the

compressor
for

ease
of

charging
After

having
taken

the

steps
up
to

3
above

proceed
with

charging
in
the

following

order

1
Shut

off

high
pressure
valve
of

manifold

gauge

2
Run

the

engine
at

idling

speeds

below
1

500

rpm

3
Set
the

Temperature
lever
and

Fan

switch
at
maximum
cool
and

maximum

speed
respectively

To

Lpw
pressure

service

valve

t
Air

Conditioning

4

Charge

efiigerani
while
con

trolling
low

pressure
gauge
reading
at

2
8

kg
cm2

40

psi
or

less

by
turning

in

or
out
low

pressure
valve
of
mani

fold

gauge
See

Fig
A

20

WARNING

Never

charge
refrigerant

through

high

pressure
side

discharge
side

of

system
since
this
will

force
re

frigerant
back
into

refrigerant
can

and
can

may
explode

To

High
pressure

service
valve

A

5
When

refrigerant
can
is

empty

fully
close
both
valves

of
manifold

gauge
and

replace

refrigerant
can
with

a
new

ot
e

Before

opening
manifold

gauge

valve
to

charge

refrigerant
from
new

can
be

sure
to

purge
air

from
inside

charging
hose

6

Charge
the

specified
amount
of

refrigerant
into

system
by
weighing

charged

refrigerant
with

scale
Over

charging
wiU

cause

discharge
pressure

to
rise
AC380A

Fig
AC
20
Charging
Refrigeront

Measure
the
amount

of

charged
refrigerant

with
a

scale

Make
a
note

of
the

amount

charged
from

can

AC252

Fig
AC
21

Chorging
Refrigeront

Refrigerant
capacity

Unit

kg
lb

Refrigerarit
Minimum

Maximum

R
12

0
8
1
8

1
0
2
2

AC14
Note
The

p
Ce
of
btibble
hi

sight
glass
of
receiver
drier
is

an

unsuitable

method
of

checking
the

amount
of

refrigerant

charged
in

system
The
state
of
the
bubbles

iJt

sight
glass
should

only
be
used
ior

checking
whether
the
amount
of

charged

refrigerant
is
small
or

not

The
amount
of

charged

refrigerani

can
be

correcdy

judged
by
means

of

discharge
pressure
Refer
to
Re

frigerant
Level
Check

7
After

the

specified
amount
of

refrigerant
has
been

charged
intosys

tern
close
manifold

gauge
valves
Then

detach

charging
hoses
from
service

valves
of

system
Be

sure
to
install

valve

cap
to
service

valve

8

Confirm
that

there
are
no
leaks
in

system
by
checking
with
a
leak
detec

tor

Refer

to

Checking
for

Leaks

Note

Conducting
8

performance
test

prior
to

removing
manifold

gauge
is

8

good
service

operation
Refer
to

Performance

Test

CHECKING
FOR

LEAKS

Conduct
a
leak
t
st
whenever
leak

age
of

refrigerant
is

suspected
and

when

conducting
service

operations

which
are

accompanied
by

disassembly

or

loosening
of
connection

fittings

Refrigerant
is

a
colorless
odorless

gas
and

leakage
from

system
is

diffi

cult
to
detect

Accordingly
the
use
of

a
leak
detector
facilitates
check
for

leaks
Two

methods
of

checking
are

available
one

employs
a

halide
leak

detector
which
bums

propane

gas
or

butane

gas
and
the
other
is

an
electric

type
leak

detector

If

any
trace
of
oil
is

noted
at
and

around
connection

fittings
it
is

a
sure

indication
that

refrigerant
is

leaking

This
condition
can
be
corrected

easily

by

retightening
the

joints
If

any

joint

on
line
is

suspected
of
small
amount
of

leakage
use
a
leak
detector
to
locate

leaking
points

HALIDE
LEAK
DETECTOR

Since
the

propane
leak
detector
and

butane
leak
detector
are
the
same
in

respect
to
their

operation
this
section

describes
the

operation
of
the

propane

leak
detector

The

copper
screen
is
heated

by
the
Air

Conditioning

burning
of

propane
Refrigerant
gas

decomposes
to
color
the

flame
when
it

contacts
the
heated

screen
The

gas
to

be
checked
is
drawn
into
the

sampling

tube
and

sent
out
to
the
burner
A

refrigerant
leak
can
clearly
be

detected

by
variations
in
the
color
of
the

flame

1

Copper
reaction

plate

2
Flame

adjusting
lines

3
Burner

4

Sampling
tube

5
Strainer

6
Gas
bomb

7

Flame

adjuster

AC010

Fig
AC
22
Checking
for
Leaks
4

The
flame
will
be

almost
colorless

when
there
is
no

refrigerant
gas
being

burned
When
there
is

a
small

refriger

ant

gas
leak
the
flame
will
be

green
or

yellowgreen
When

refrigerant
gas
leak

age
is

large
the
flame

will
be
brilliant

blue
or

purple
Since
the

color
of
the

flame
will
be

yellow
when
dust
is

being
burned

or
there
is

aging
scale
on

copper
reaction

plate
always
keep
the

strainer

of

sampling
tube
and
reaction

plate
clean

5

Major
check

points

l
Compressor

Compressor
shaft
seal

rotate
the

compressor
by
hand

Flexible
hose

connections

Front
and
rear

head

gaskets

Service
valve

2
Condenser

Condenser

pipe
fitting

Condenser
inlet
and

outlet

pipe

connections

3
Refrigerant
lines

Flared
section
of

high

pressure
and

low

pressure
flexible
hoses

Une

connections

4

Evaporator
housing

Inlet
and
outlet
line
connections

Expansion
valve

Propane
type
Butane

type

ELECTRIC
LEAK
DETECTOR

NO
LEAK

Greenish
blue
Pale

blue

For
the

operational
procedures

SMALL
LEAK
Yellow

Bright
blue
refer

to
the
instructions
furnished
with

LARGE
LEAK

Purple
Vivid

green
each
electric
leak
detector

Discharge
refrigerant
in
one
or

two
seconds

to
ascertain

that

system

has

a
sufficient

pressure
needed
for

leak
detection

Charge
with
0
4

kg
0
9

Ib
of

refrigeranl
if

necessary

2

Light
leak
detector

Adjust
the

height
of
the
flame
between

flame

adjusting
lines
at
the

top
and
bottom

of
combustion
tube

A
reaction

plate

will

immediately
become
red
hot

3
Place
the
end
of

sampling
tube

near
the

point
of
the

suspected
leak
in

system

Note

a
Since

refrigerant
gas
is

heavier
than

air
small
leaks

can
be

easily
detect

ed

by

placing
sampling
tube
direct

ly
below
the
check

point
b
Suitable
ventilation
is

required
If

refrigerant
gas
is

mixed
with
the

surrounding
air
leak
detector
will

always
indicate
a

response
and

detection
of
the
actual
leak
will
be

difficult

c
Never

hold
leak
detector
at
an

angle

WARNING

a
Never
inhale
the
fumes

produced

by
combustion

of

refrigerant
gas

since

they
are
toxic

b
Never
use
halide
torch
in
a

place

where
combustible
or

explosive

gas
is

present

AC
15
REFRIGERANT

LEVEL
CHECK

SIGHT

GLASS

Sight
glass
is

provided
at
the

top
of

receiver

drier
One

guide
for
whether

there
is

enough
refrigerant
in

syst
m
is

given
by
observing
refrigerant
flow

through
sight
glass
However
this

method
is
unsuitable
for

judging
the

aJTlount
of

refrigerant
The
correct

refrigeranl
level
can
be

judged
by

measuring
the

system
pressures
in

ac

cordance
with
the

procedures
as
de

scribed
in
Performance
Test

1

Start
the

engine
and
hold

engine

speed
al
1

500

rpm

2

Set
AIR
lever
to

AlC

position