Head light DATSUN 210 1979 User Guide

Page 516 of 548


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

Page 546 of 548


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