Installation guide
Connect
Ground
and
Power
Wires
Connect
ground
wire
to
ground
connection
in
control
box
for
safety.
Connect
power
wiring
to
contactor
as
shown
in
Fig.
6.
DISCONNECT
PERN.
E.
C.
AND/OR
LOCAL
GODES
7-7
CONTACTOR
FIELD
POWER
Oo
oO
|
WIRING
|
O
Oo
FIELD
GROUND
DQ
WIRING
GROUND
a
LUG
AS91056
Fig.
6
-
Line
Connections
Connect
Control
Wirin
This
unit
is
capable
of
communication
with
an
Infinity
Control,
or
will
operate
using
standard
24v
2-stage
thermostat.
Route
24-v
control
wires
through
control
wiring
grommet
and
connect
leads
to
control
board.
When
an
Infinity
User
Interface
is
available,
connect
to
A
and
B
connections
only.
If
additional
grounding
is
needed,
use
C
terminal.
If
a
2-stage
thermostat
is
used,
connect
to
the
R,
C,
Y1,
and
Y2
connections.
Refer
to
the
wiring
label
to
further
clarification.
Use
No.
18
AWG
color-coded,
insulated
(35°C
minimum)
wire.
If
thermostat
is
located
more
than
100
ft.
(30.48
m)
from
unit,
as
measured
along
the
control
voltage
wires,
use
No.
16
AWG
color-coded
wire
to
avoid
excessive
voltage
drop.
All
wiring
must
be
NEC
Class
1
and
must
be
separated
from
incoming
power
leads.
Use
furnace
transformer,
fan
coil
transformer,
or
accessory
transformer
for
control
power,
24v/40va
minimum.
NOTE:
Use
of
available
24v
accessories
may
exceed
the
minimum
40va
power
requirement.
Determine
total
transformer
loading
and
increase
the
transformer
capacity
or
split
the
load
with
an
accessory
transformer
as
required.
Final
Wiring
Check
IMPORTANT:
Check
factory
wiring
and
field
wire
connections
to
ensure
terminations
are
secured
properly.
Check
wire
routing
to
ensure
Wires
are
not
in
contact with
tubing,
sheet
metal,
etc.
Compressor
Crankcase
Heater
When
equipped
with
a
crankcase
heater,
furnish
power
to
heater
a
minimum
of
24
hr
before
starting
unit.
To
furnish
power
to
heater
only,
set
thermostat
to
OFF
and
close
electrical
disconnect
to
outdoor
unit.
A
crankcase
heater
is
required
if
refrigerant
tubing
is
longer
than
80
ft.
(24.38
m).
Refer
to
the
Application
Guideline
and
Service
Manual
Longline
Section-Residential
Split-System
Air
Conditioners
and
Heat
Pumps.
Airflow
Setup
for
Infinity
Control
Furnace
or
FE
Fan
Coil
(communicating)
When
using
an
Infinity
User
Interface,
airflow
is
automatically
selected
based
on
equipment
size.
See
User
Interface
Installation
Instructions
and
air
conditioner
Product
Data
for
available
adjustments.
Airflow
Selections
(ECM
Furnaces
-
non
commu-
nicating)
The
ECM
Furnaces
provide
blower
operation
to
match
the
capacities
of
the
compressor
during
high
and
low
stage
cooling
operation.
Tap
selections
on
the
furnace
control
board
enable
the
installing
technician
to
select
the
proper
airflows
for
each
stage
of
cooling.
Below
is
a
brief
summary
of
the
furnace
airflow
configurations
1.
The
Y2
call
for
high
stage
cooling
energizes
the
“Cool”
tap
on
the
control
board.
The
grey
wire
from
cool
tap
is
connec-
ted
to
tap
5
on
the
motor.
Refer
to
the
furnace
Product
Data
to
find
the
corresponding
airflow.
If
the
airflow
setting
for
high
cooling
needs
to
be
switched
from
tap
5
to
a
different
tap,
jumper
a
connection
from
the
cool
tap
to
the
desired
tap
so
that
the
Y2
signal
is
communicated
via
the
cool
tap
to
the
desired
speed
tap.
bo
.
The
Y1
call
for
low
stage
cooling
energizes
the
“Fan”
tap
on
the
control
board.
The
red
wire
from
the
fan
tap
is
con-
nected
to
tap
1
on
the
motor.
Refer
to
the
furnace
Product
Data
to
find
the
corresponding
airflow.
If
the
airflow
setting
for
low
cooling
needs
to
be
switched
from
tap
1
to
a
differ-
ent
tap,
jumper
a
connection
from
the
Fan
tap
to
the
desired
tap
so
that
the
Y1
signal
is
communicated
via
the
Fan
tap
to
the
desired
speed
tap.
The
Y1
setting
will
also
govern
the
continuous
fan
airflow
for
the
furnace.
Reter
to
the
literature
for
the
furnace
and
air
conditioner
Product
Data
for
further
details.
Airflow
Selection
for
Variable
Speed
Furnaces
(non-communicating)
The
variable
speed
furnaces
provide
blower
operation
to
match
the
capacities
of
the
compressor
during
high
and
low
stage
cooling
operation.
The
furnace
control
board
allows
the
installing
technician
to
select
the
proper
airflows
for
each
stage
of
cooling.
Below
is
a
summary
of
required
adjustments.
See
furnace
installation
instructions
for
more
details:
1.
The
A/C
DIP
switch
setting
determines
airflow
during
high
stage
cooling
operation.
Select
the
A/C
DIP
switch
setting
corresponding
to
the
available
airflow
shown
in
the
furnace
Installation
Instructions
that
most
closely
matches
the
re-
quired
airflow
shown
in
the
air
conditioning
Product
Data
for
HIGH
speed.
.
The
CF
DIP
switch
setting
determines
airflow
during
low
stage
cooling
operation.
Select
the
CF
DIP
switch
setting
corresponding
to
the
available
airflow
shown
in
the
furnace
installation
instructions
that
most
closely
matches
the
re-
quired
airflow
shown
in
the
air
conditioning
Product
Data
for
LOW
speed.
If
a
higher
or
lower
continuous
fan
speed
is
desired,
the
continuous
fan
speed
can
be
changed
using
the
fan
switch
on
the
thermostat.
Refer
to
the
furnace
Installa-
tion
Instructions
for
details
of
how
to
use
this
feature.
Airflow
Selection
for
FV4C
Fan
Coils
(non-com-
municating)
bo
The
FV4
provides
high-
and
low-stage
blower
operation
to
match
the
capacities
of
the
compressor
at
high-
and
low-stage.
To
select
recommended
airflow,
refer
to
the
FV4C
Installation
Instructions.
The
FV4C
utilizes
an
Easy
Select
control
board
that
allows
the
installing
technician
to
select
proper
airflows.
This
fan
coil
has
an
adjustable
blower-olf
delay
factory
set
at
90
sec.
for
high-
and
low-stage
blower
operation.
When
using
a
communicating
control
with
the
fan
coil
or
the
furnace,
dip-switch
adjustments
are
not
necessary.
The
outdoor
unit
configuration
and
the
indoor
airflows
are
determined
by
communicating
control
setup.
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