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Split
System
Condensers
Installation
Instructions
J
To
Check
System
Refrigerant
Charge
(Heating
Mode)
The
recommended
method
of
addition
or
removal
of
charge
in
the
heating
mode
is
by
weight.
The
system
op-
eration
may
be
checked
against
the
performance
charts.
Remember,
indoor
airflow
must
be
approximately
400
CFM
per
ton
to
compare
operation
to
performance
charts.
Defrost
System
(Heat
Pump
Only)
Time
/
Temperature
Type:
The
defrost
system
is
electronic
with
an
adjustable
time
in-
terval
of
90,
60,
or
30
minutes.
It
is
factory
set
at
60
or
90
minutes.
At
the
selected
time
interval
with
the
outdoor
coil
temperature
at
approximately
28°F,
the
system
will
defrost.
When
the
sensor
sees
the
correct
rise
in
the
outdoor
coil
temperature
or
after
approximately
10
minutes,
the
defrost
will
be
terminated.
Demand
Type:
The
defrost
frequency
is
demand
based
on
the
coil
reach-
ing
a
temperature
of
35
°F
for
a
minimum
of
34
minutes
and
a
maximum
of
6
hours
of
run
time.
The
actual
time
interval
will
vary
depending
on
the
outdoor
temperature
which
the
control
is
also
sensing.
This
can
not
be
adjusted,
but the
defrost
termination
temperature
can
be.
Factory
setting
is
50°F
for
termination
or
after
approximately
14
minutes,
the
defrost
will
be
terminated.
Temperature
can
be
set
higher
if
all
the
ice
is
not
melting
off
the
coil.
In
some
areas,
with
high
humidity,
the
time
interval
or
tem-
perature
termination
may
require
adjustment
for
complete
removal
of
ice
from
the
coil.
For
best
economy,
always
set
to
the
longest
interval
or
lowest
temperature
that
will
keep
the
coil
clear
of
ice.
NOTE:
The
term
ice
means
hard
but not
frost.
During
nor-
mal
operation,
the
coils
may
become
coated
with
frost
until
they
are
solid
white.
The
time
interval
for
the
defrost
should
be
set
so
the
frost
and
ice
melt
off
completely
without
hard
ice
building
up on
the
coil.
Defrost Control
Time
Interval
Adjustment
(Except
Demand
Defrost)
To
adjust defrost
frequency,
turn
off
all
power
to
the
Heat
Pump.
Remove
control
box
cover
and
locate
the
electronic
defrost
control
board.
The
defrost
control
board
has
a
jumper
clip
that
fits
over
two
pins.
To
change
the
time
interval,
remove
the
jumper
clip
and
place
it
on
pins
for
the
desired
time
interval,
30,
60
or
90
minutes.
17
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