Installation guide
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3.
For
alternate
liquid
line
options
on
18—42
size
units,
see
Product
Data
or
Residential
Piping
and
Application
Guideline
Install
Liquid-Line
Filter
Drier
Indoor
&
CAUTION
UNIT
DAMAGE
HAZARD
Failure
to
follow
this
caution
may
result
in
equipment
damage
or
improper
operation.
1.
Installation
of
filter
drier
in
liquid
line
is
required.
2.
Filter
drier
must
be
wrapped
in
a
heat-sinking
material
such
as
a
wet
cloth
while
brazing.
Refer
to
Fig.
4
and
install
filter
drier
as
follows:
1.
Braze
5-in.
liquid
tube
to
the
indoor
coil.
2.
Wrap
filter
drier
with
damp
cloth.
3.
Braze
filter
drier
to
above
5-in.
(127
mm)
liquid
tube.
Flow
arrow
must
point
towards
indoor
coil.
4.
Connect
and
braze
liquid
refrigerant
tube
to
the
filter
drier.
A05178
Fig.
4
-
Liquid
Line
Filter
Drier
Evacuate
Refrigerant
Tubing
and
Indoor
Coil
UNIT
DAMAGE
HAZARD
Failure
to
follow
this
caution
may
result
in
equipment
damage
or
improper
operation.
Never
use
the
system
compressor
as
a
vacuum
pump.
Refrigerant
tubes
and
indoor
coil
should
be
evacuated
using
the
recommended
deep
vacuum
method
of
500
microns.
The
alternate
triple
evacuation
method
may
be
used
(see
triple
evacuation
procedure
in
service
manual).
Always
break
a
vacuum
with
dry
nitrogen.
Deep
Vacuum
Method
The
deep
vacuum
method
requires
a
vacuum
pump
capable
of
pulling
a
vacuum
of
500
microns
and
a
vacuum
gage
capable
of
accurately
measuring
this
vacuum
depth.
The
deep
vacuum
method
is
the
most
positive
way
of
assuring
a
system
is
free
of
air
and
liquid
water.
A
tight
dry
system
will
hold
a
vacuum
of
1000
microns
after
approximately
7
minutes.
See
Fig.
5.
LEAK
IN
TIGHT
500
ry
SYSTEM
0
1
2 3 4 5 6 7
MINUTES
A95424
Fig.
5
-
Deep
Vacuum
Graph
Final
Tubing
Check
IMPORTANT:
Check
to
be
certain
factory
tubing
on
both
indoor
and
outdoor
unit
has
not
shifted
during
shipment.
Ensure
tubes
are
not
rubbing
against
each
other
or
any
sheet
metal
or
wires.
Pay
close
attention
to
feeder
tubes,
making
sure
wire
ties
on
feeder
tubes
are
secure
and
tight.
Make
Electrical
Connections
Be
sure
field
wiring
complies
with
local
and
national
fire,
safety,
and
electrical
codes,
and
voltage
to
system
is
within
limits
shown
on
unit
rating
plate.
Contact
local
power
company
for
correction
of
improper
voltage.
See
unit
rating
plate
for
recommended
circuit
protection
device.
NOTE:
Operation
of
unit
on
improper
line
voltage
constitutes
abuse
and
could
affect
unit
reliability.
See
unit
rating
plate.
Do
not
install
unit
in
system
where
voltage
may
fluctuate
above
or
below
permissible
limits.
NOTE:
Use
copper
wire only
between
disconnect
switch
and
unit.
NOTE:
Install
branch
circuit
disconnect
of
adequate
size
per
NEC
to
handle
unit
starting
current.
Locate
disconnect
within
sight
from
and
readily
accessible
from
unit,
per
Section
440-14
of
NEC.
Route
Ground
and
Power
Wires
Remove
access
panel
to
gain
access
to
unit
wiring.
Extend
wires
from
disconnect
through
power
wiring
hole
provided
and
into
unit
control
box.
ELECTRICAL
SHOCK
HAZARD
Failure
to
follow
this
warning
could
result
in
personal
injury
or
death.
The
unit
cabinet
must
have
an
uninterrupted
or
unbroken
ground
to
minimize
personal
injury
if
an
electrical
fault
should
occur,
The
ground
may
consist
of
electrical
wire
or
metal
conduit
when
installed
in
accordance
with
existing
electrical
codes.