Installation guide
Table
3
—
Outdoor
Fan
Motor
PWM
Outdoor
Temp
(DC
volts,
Tolerance
+/-
2%)
LOW-
&
MODEL
|
oresoeico"e)
|
(OsTero4-r40-0)
|
MIGH-STAGE
24ANB124
9.57
10.88 11.90
24ANB136
9.06
10.23 11.90
24ANB148
9.91
11.04 11.90
24ANB160
10.83 11.70 11.90
NOTE:
For
24ANB1
models
in
low—ambient
cooling,
the
PWM
output
for
both
high—
and
low—stage
equals
the
value
for
low—stage
operation
below
55°F
(12.8°C).
In
low
ambient
cooling
(below
55°F/12.78°C)
on
24ANB7
and
24ANB1
models,
the
control
board
cycles
the
fan
off
and
on.
Time
Delays
The
unit
time
delays
include:
¢
Five
minute
time
delay
to
start
cooling
or
heating
operation
when
there
is
a
call
from
the
thermostat
or
user
interface.
To
bypass
this
feature,
momentarily
short
and
release
Forced
Defrost
pins.
¢
Five
minute
compressor
re-cycle
delay
on
return
from
a
brown-out
condition.
¢
Two
minute
time
delay
to
return
to
standby
operation
from
last
valid
communication
(with
Infinity
only).
¢
One
minute
time
delay
of
outdoor
fan
at
termination
of
cooling
mode
when
outdoor ambient
is
greater
than
or
equal
to
100°F
(37.78°C).
¢
There
is
no
delay
between
staging
from
low
to
high
and
from
high
to
low
capacity.
The
compressor
will
change
from
low
to
high
and
from
high
to
low
capacity
“on
the
fly”
to
meet
the
demand.
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SUPPLIED
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UTILITY
PROVIDER
A12260
Infinity
Controlled
Low
Ambient
Cooling
This
unit
is
capable
of
low
ambient
cooling
down
to
O°F
(-17.78°C)
without
a
kit
-
ONLY
when
using
Infinity
control.
A
low
ambient
kit
is
not
required,
and
the
outdoor
fan
motor
does
not
need
to
be
replaced
for
Infinity
controlled
low
ambient
operation.
The
Infinity
Control
provides
an
automatic
evaporator
coil
freeze
protection
algorithm
that
eliminates
the
need
for
an
evaporator
freeze
thermostat.
Low
ambient
cooling
must
be
enabled
in
the
User
Interface
set
up.
Fan
may
not
begin
to
cycle
until
about
40°F
(4.4°C)
OAT.
Fan
will
cycle
based
on
coil
and
outdoor
air
temperature.
Infinity
controlled
low
ambient
mode
operates
as
follows:
—
Fan
is
OFF
when
outdoor
coil
temp
is
less
than
outdoor
air
temperature
(+3°F
/
1.67°C)
or
outdoor
fan
has
been
ON
for
30
minutes.
(Fan
is
turned
off
to
allow
refrigerant
system
to
stabilize.)
—
Fan
is
ON
when
outdoor
coil
temp
is
more
than
outdoor
air
temperature
(+
25°F
/
13.89°C)
or
outdoor
coil
temp
is
more
than
80°F
(26.67°C)
or
if
outdoor
fan
has
been
OFF
for
30
minutes.
(Fan
is
turned
on
to
allow
refrigerant
system
to
stabilize.)
—
Low
pressure
switch
is
ignored
for
first
3
minutes
during
low
ambient
start
up.
After
3
minutes,
if
LPS
trips,
then
outdoor
fan
motor
is
turned
off
for
10
minutes
with
the
compressor
running.
If
LPS
closes
within
10
minutes,
then
cooling
continues
with
the
outdoor
fan
cycling
per
the
coil
temperature
routine
listed
above
for
the
remainder
of
the
cooling
cycle.
If
the
LPS
does
not
close
within
10
minutes,
then
the
normal
LPS
trip
response
(shut
down
cooling
operation
and
generate
LPS
trip
error)
will
occur.
—
The
PWM
output
for
both
high
and
low-stage
equals
the
value
for
low-stage
operation,
below
55°F
(12.8°C).
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