Installation guide
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Check
Charge
Models
24ANB7
/
24ANB1
should
be
charged
in
high
stage
compressor
operation.
Factory
charge
amount
and
desired
subcooling
are
shown
on
unit
rating
plate.
Charging
method
is
shown
on
information
plate
inside
unit.
To
properly
check
or
adjust
charge,
conditions
must
be
favorable
for
subcooling
charging.
Favorable
conditions
exist
when
the
outdoor
temperature
is
between
70°F
and
100°F (21.11°C
and
37.78°C),
and
the
indoor
temperature
is
between
70°F
and
80°F
(21.11°C
and
26.67°C).
Follow
the
procedure
below:
Unit
is
factory
charged
for
15ft
(4.57
m)
of
lineset.
Adjust
charge
by
adding
or
removing
0.6
o02/ft
of
3/8
liquid
line
above
or
below
15ft
(4.57
m)
respectively.
For
standard
refrigerant
line
lengths
(80
ft/24.38
m
or
less),
allow
system
to
operate
in
cooling
mode
at
least
15
minutes.
If
conditions
are
favorable,
check
system
charge
by
subcooling
method.
If
any
adjustment
is
necessary,
adjust
charge
slowly
and
allow
system
to
operate
for
15
minutes
to
stabilize
before
declaring
a
properly
charged
system.
If
the
indoor
temperature
is
above
80°F
(26.67°C),
and
the
outdoor
temperature
is
in
the
favorable
range,
adjust
system
charge
by
weight
based
on
line
length
and
allow
the
indoor
temperature
to
drop
to
80°F
(26.67°C)
before
attempting
to
check
system
charge
by
subcooling
method
as
described
above.
If
the
indoor
temperature
is
below
70°F
(21.11°C),
or
the
outdoor
temperature
is
not
in
the
favorable
range,
adjust
charge
for
line
set
length
above
or
below
15ft
(4.57
m)
only.
Charge
level
should
then
be
appropriate
for
the
system
to
achieve
rated
capacity.
The
charge
level
could
then
be
checked
at
another
time
when
the
both
indoor
and
outdoor
temperatures
are
in
a
more
favorable
range.
NOTE:
If
line
length
is
beyond
80
ft
(24.38
m)
or
greater
than
20
ft
(6.10
m)
vertical
separation,
See
Long
Line
Guideline
for
special
charging
requirements.
Final
Checks
IMPORTANT:
Before
leaving
job,
be
sure
to
do
the
following:
1.
Ensure
that
all
wiring
is
routed
away
from
tubing
and
sheet
metal
edges
to
prevent
rub-through
or
wire
pinching.
bo
.
Ensure
that
ail
wiring
and
tubing
is
secure
in
unit
before
adding
panels
and covers.
Securely
fasten
all
panels
and
covers.
3.
Tighten
service
valve
stem
caps
to
1/12-turn
past
finger
tight.
4.
Leave
Owner’s
Manual
with
owner.
Explain
system
opera-
tion
and
periodic
maintenance
requirements
outlined
in
manual.
5.
Fill
out
Dealer
Installation
Checklist
and
place
in
customer
file.
CARE
AND
MAINTENANCE
For
continuing
high
performance
and
to
minimize
possible
equipment
failure,
periodic
maintenance
must
be
performed
on
this
equipment.
Frequency
of
maintenance
may
vary
depending
upon
geographic
areas,
such
as
coastal
applications.
See
Owner’s
Manual
for
information.