Loading ...
INTRODUCTION
Use
this
instruction
manual
to
install
indoor
coils
on
upflow
or
downflow
furnaces.
Do
not
install
coil
in
horizontal
position.
Coils
are
enclosed
in
a
painted
casing
have
factory-installed
TXV’s.
These
coils
are
used
with
R-410A
refrigerant
systems.
INSTALLATION
NOTE:
Models
with
tin-plated
copper
coils,
“T”
in
the
8th
position
of
the
model
number,
are
installed
the
same
as
standard
copper
coils.
These
units
can
be
installed
in
multiple
configurations.
Before
installation,
there
are
several
performance
requirements
that
must
be
considered
because
poor
installation
can
negatively
alter
performance.
This
section
will
briefly
discuss
those
factors.
Airflow
Airflow
amount
and
distribution
are
vital
to
adequate
system
performance.
Problems
that
can
be
experienced
with
incorrect
airflow
include:
e
low
system
performance
*
restricted
TXV
°
frosted
coil
*
poor
humidity
control
¢
water
blow-off
When
attaching
the
coil
and
building
the
plenum,
pay
special
attention
to
the
effect
these
details
will
have
on
airflow.
After
system
start-up,
check
the
cfm
to
insure
that
it
is
correct.
(Generally,
the
cfm
should
be
350
to
400
cfm/ton
during
normal
cooling
operation.)
TXV
A
thermal
expansion
valve
is
utilized
in
this
coil
design
to
optimize
performance
and
comfort
throughout
the
entire
operating
range
of
the
system.
Special
attention
needs
to
be
taken
to
the
TXV
when
installing
the
coil
¢
Do
not
overheat
valve.
Temperatures
that
exceed
212°F
(100°C)
can
harm
valve
performance.
Use
a
wet
cloth
or
heat
sink
when
brazing.
e
Place
liquid
filter
dryer
near
ID
unit
to
reduce
the
risk
of
debris
clogging
the
valve.
e
Make
sure
TXV
bulb
is
securely
fastened
and
wrapped
in
the
indentation
on
vapor
line
tube.
END4X,
ENW4X
coils
have
a
factory—installed
hard—shutoff
TXV
designed
only
for
use
with
R-410A
refrigerant.
Use
only
with
outdoor
units
designed
for
R-410A.
NOTE:
All
TXV’S
have
preset
superheat
settings
and
are
not
field—adjustable.
Cabinet
Sweating
If
this
unit
is
installed
in
a
garage,
attic,
or
other
unconditioned
space,
special
attention
needs
to
be
given
to
the
potential
of
cabinet
sweating.
A
6-in
(152
mm)
wide
piece
of
insulation
should
be
wrapped
around
the
coil
casing
and
supply
duct
connection
point.
inspect
Equipment
File
claim
with
shipper
if
equipment
is
damaged.
Select
Installation
Procedure
4&
CAUTION
PROPERTY
DAMAGE
HAZARD
Failure
to
follow
this
caution
may
result
in
property
damage.
Installing
coils
rotated
90°
from
the front
of
the
furnace,
in
upflow
or
downflow
applications,
may
cause
water
blow-off
or
coil
freeze—up
due
to
the
concentration
of
air
on
one
slab
of
the
coil
or
lack
of
air
to
a
slab
in
the
coil.
It
is
recommended
that
on
this
type
of
application,
a
field~supplied
adapter
be
placed
between
the
coil
and
furnace
to
allow
air
to
distribute
properly
between
all
slabs
of
the
coil.
NOTE:
Furnace
coils
are
not
approved
to
be
used
in
fan
coil
or
“draw-through”
type
applications.
To
install
cased
coils
in
upflow
applications,
follow
the
instructions
below,
Upflow
Cased
Coil
Installation.
To
install
cased
coils
in
downflow
applications,
follow
the
instructions
below,
Downflow
Cased
Coil
Installation.
See
Table
1
for
dimensions
and
overhang
options.
Refer
to
instructions
for
placement
of
coil
casing
on
furnace.
484
071
3600
00
Loading ...
Loading ...
Loading ...