Specifications

LEAK
TESTING
YODER
LOOP
The
following
general
information
ex-
plains
several
methods
used
in leak
test-
ing the
yoder
loop.
The
yoder
loop is
routed
in the front
cabi-
net
flange at
the top and
sides.
The
yoder
condenser
loop warms
the front
of
the ca-
binet
and
thus
reduces
the formation
of
condensation
on
the cabinet
front.
By
transferring
heat
to the cabinet
front, the
loop helps cool
the condensing
system.
Since
the
yoder
condenser
loop cannot
be
reached
for leak
testing, it
is impossible
to
check
in the normal
manner.
Instead,
it
must be
disconnected
from
the system
and
checked
separately.
NOTE: BE SURE
A LEAK IS
NOT PRESENT
IN ANY EXTERNAL
TUBING OR
JOINT
BE-
FORE
PERFORMING
THE
FOLLOWING
TESTS.
USING
PRESSURE
METHOD
To test for leaks
in the
yoder
loop
tubing,
a
pressurized
test using
the
following
equipment
is required,
A.
An access
fitting.
B. A cylinder
of dry
nitrogen.
C. Pressure
regulator.
D. One
gauge.
E. Line valve
and tubing.
The
access
fitting should
be
prepared
as
follows:
1. Solder
the
copper tubing
(C)
to the
adaptor
(A).
2. Assemble
all
parts
to
the
"brass
tee"
(B)
using
a sealant
such
as
"Leak
Lock"
to assure a
leak-tight
joint.
3. Seal
the end of
the copper
tube bY
crimping
and silver-soldering.
SOLDER
ADAPTER
TO
N,IALE
PIPE
@
1
/8" MIPT
x
1/4"
filSAE
WITH SCHFADER
VALVE
VALVECAP
@
\
A\\
\y\\
tf
trfft
4.
5.
Apply
200 lbs.
pressure
at
the
Schr.ader
valve and
leak test
the ac-
cess fitting
with a soap
solution.
lf
there
is no leak,
cut the crimped
end
off
the
tube
(C).
PRESSURE
REGULATOR
LINE
VALVE
.\
TESTING
YODER
LOOP
Top Mount Models
1. Disconnect unit
f rom
power
source.
2. Install a service
valve on the
process
tube
and vent
the refrigerant
outside.
GAUGES
3-8