NOTE:
Read
the
entire
instruction
manual
before
starting
the
installation.
TABLE
OF
CONTENTS
PAGE
SAFETY
CONSIDERATIONS
1.0.2.0...
0.0...
1
INTRODUCTION
1.0...
cee
2
INSTALLATION
1.0.2.0...
0c
cece
eee
eee
eens
2
Horizontal
Right
and
Left
with
Pan
Extension
......
3
Furnace
Attachment.............0
0.0
eee
eee
eee
3
Horizontal
Attic
2.0...
kee
ee
4
Horizontal
Crawl
Space
...
0.2.0.0...
eee
eee
4
Refrigerant
Lines
............00.0
ccc
eee
eee
4
Connect
Refrigerant
Liquid
and
Suction
Lines
......
4
Connect
Condensate
Drain
Line
.................
5
Waste
Line
Connection
................00
000
eee
5
Model
Number
Identification
...................4.
6
SAFETY
CONSIDERATIONS
Improper
installation,
adjustment,
alteration,
service,
maintenance,
or
use
can
cause
explosion,
fire,
electrical
shock
or
other
conditions
which
may
cause
death,
personal
injury
or
property
damage.
Consult
a
qualified
installer,
service
agency,
or
your
distributor
or
branch
for
information
or
assistance.
The
qualified
installer
or
agency
must
use
factory-authorized
kits
or
accessories
when
modifying
this
product.
Refer
to
the
individual
instructions
packaged
with
the
kits
or
accessories
when
installing.
Follow
all
safety
codes.
Wear
safety
glasses,
protective
clothing
and
work
gloves.
Use
quenching
cloths
for
brazing
operations.
Have
fire
extinguisher
available.
Read
these
instructions
thoroughly
and
follow
all
warnings
or
cautions
attached
to
the
unit.
Consult
local
building
codes
and
the
current
editions
of
the
National
Electrical
Codes
(NEC)
NFPA
70.
In
Canada,
refer
to
the
current
editions
of
the
Canadian
Electrical
Code
CSA
C22.1.
Recognize
safety
information.
This
is
the
safety-alert
symbol
/A\.
When
you
see
this
symbol
on
the
unit
and
in
instructions
or
manuals,
be
alert
to
the
potential
for
personal
injury.
Understand
the
signal
words
DANGER,
WARNING
and
CAUTION.
These
words
are
used
with
the
safety-alert
symbol.
DANGER
identifies
the
most
serious
hazards
which
will
result
in
severe
personal
injury
or
death.
WARNING
signifies
hazards
which
could
result
in
personal
injury
or
death.
CAUTION
is
used
to
identify
unsafe
practices,
which
may
result
in
minor
personal
injury
or
product
and
property
damage.
NOTE
is
used
to
highlight
suggestions
which
will
result
in
enhanced
installation,
reliability,
or
operation.
NOTE:
Nitrogen
can
leak
out
through
the
needle
pierce
hole
in
the
plugs.
This
does
not
indicate
a
leaking
coil
nor
warrant
return
of
the
coil.
ELECTRICAL
SHOCK
HAZARD
Failure
to
follow
this
warning
could
result
in
personal
injury
or
death.
Before
installing,
modifying
or
servicing
system,
always
turn
off
main
power
to
system.
There
may
be
more
than
one
disconnect
switch.
Lock
out
and
tag
switch
with
a
suitable
warning
label.
4&
CAUTION
PERSONAL
INJURY
HAZARD
Failure
to
follow
this
caution
may
result
in
personal
injury.
This
coil
contains
Nitrogen
precharge
of
15
PSIG.
Release
of
this
pressure
through
the
center
of
the
rubber
plugs
is
required
before
removing
the
plugs.
4&
CAUTION
CUT
HAZARD
Failure
to
follow
this
caution
may
result
in
personal
injury.
Sheet
metal
parts
may
have
sharp
edges
or
burrs.
Use
care
and
wear
appropriate
protective
clothing
and
gloves
when
handling
parts.
484
01
3700
01
December
2011
INTRODUCTION
The
ENH4X
is
a
horizontal,
multi-use
furnace
coil
(see
Figure
1).
With
the
use
of
field-supplied
transition
duct,
these
furnace
coils
can
also
be
applied
to
other
similar
horizontal
furnaces
on
the
market.
The
ENH4X
is
available
in
sizes
24
through
60.
All
models
are
equipped
with
a
factory-installed
TXV
and
are
used
with
R-410A
refrigerant
systems.
NOTE:
Models
with
tin-plated
copper
coils,
“T”
in
the
8th
position
of
the
model
number,
are
installed
the
same
as
standard
copper
coils.
INSTALLATION
Shipping Brace
-|,
Remove
2
Screws
Pan
Extension
A06031
Figure
1
-
Model
ENH4X
Furnace
Coil
This
coil
is
not
designed
to
be
installed
with
furnaces
that
measure
wider
than
the
coil
itself.
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.
Ductwork
Coil
Furnace
<<
a
Airflow
¢«——
Filler
Plate
Ductwork
Coll
Furnace
os
|
Airflow
©
200
|)
«—
Fifer
Plate
Ductwork
Coil
Furnace
>
oO
¢
Filler
Plate
A08065
Figure
2
-
Horizontai-Left
installation
with
Filler
Plate
Furnace
Coil
Ductwork
Airflow
S90
Filler
Plate
——»
Furnace
Coil
Ductwork
Filler
Plate
——»
oC
Filler
Plate
—»
Coil
Ductwork
a
Furnace
Airflow
——
A08066
Figure
3
-
Horizontal-Right
Installation
with
Filler
Plate
Airflow
Airflow
amount
and
distribution
are
vital
to
adequate
system
performance.
In
addition,
heat
pump
applications
require
airflow
in
a
particular
direction
for
best
performance.
See
decal
on front
of
coil
for
correct
direction.
Problems
that
can
be
experienced
with
incorrect
airflow
include:
¢
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.)
IXv
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.
484
01
3700
01
¢
Place
liquid
filter
dryer
near
ID
unit
to
reduce
the
risk
of
debris
clogging
the
valve.
¢
Make
sure
TXV
bulb
is
securely
fastened
and
wrapped
in
the
indentation
on
vapor
line
tube.
ENH4X
Models:
These
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
lf
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
inch
(152
mm)
wide
piece
of
insulation
should
be
wrapped
around
the
coil
casing
and
supply
duct
connection
point.
Condensate
Management
With
proper
installation,
these
coils
will
manage
the
condensate
without
blow-off
into
the
duct
work.
The
60
size
coil
requires
the
addition
of
a
pan
extension
for
both
horizontal
left
and
horizontal
right
position,
which
is
supplied
with
the
coils.
See
detailed
instructions
for
more
info.
Also,
refer
to
Connect
Condensate
Drain
Line
section
of
this
instruction.
4&
CAUTION
PROPERTY
DAMAGE
HAZARD
Failure
to
follow
this
caution
may
result
in
property
damage.
When
installing
over
a
finished
ceiling
and/or
living
area,
install
a
field-fabricated
secondary
condensate
pan
under
the
entire
unit.
HORIZONTAL-RIGHT
AND
HORIZONTAL-LEFT
WITH
PAN
EXTENSION
(5
Ton
Size
Only)
1.
There
are
two
separate
pan
extensions shipped
with
the
unit.
For
horizontal
left
installations,
use
the
pan
attached
to
the
left
shipping
bracket.
For
horizontal
right
installations,
use
the
pan
attached
to
the
right
shipping
bracket.
Be
sure
to
use
the
correct
pan
extension
for
the
application.
There
should
not
be
any
gaps
between
the
plastic
condensate
pan
and
the
pan
extension.
All
condensate
should
flow
from
the
pan
extension
to
the
plastic
condensate
pan
and
not
leak
into
the
coil
cabinet
or
duct.
NOTE:
Discard
the
pan
not
used
along
with
both
shipping
brackets.
2.
For
horizontal-left
installation,
install
pan
extension
onto
left
end
of
horizontal-condensate
pan.
Pan
extension
is
slotted
to
fit
onto
condensate
pan
edge
and
will
extend
into
supply
plenum.
See
Figure
4.
)
Pan
Extension
:
Supply
Condensate
Pan
Plenum
A06032
Figure
4
-
Horizontai-Left
Installation
of
Pan
Extension
8.
For
horizontal-right
installation,
install
pan
extension
onto
right
end
of
horizontal-condensate
pan.
Pan
extension
is
slotted
to
fit
onto
condensate
pan
edge
and
will
extend
into
supply
plenum.
See
Figure
5.
A09084
Figure
5
-
Horizontal-Right
Installation
of
Pan
Extension
Installation
Configurations
These
units
can
be
installed
on
a
work
platform,
secured
to
roof
trusses
in
the
attic,
suspended
from
hangers
on
floor
joists
in
the
crawl
space,
or
installed
on
blocks.
See
proper
section
and
figures
for
detailed
installation
instructions.
NOTE:
Pan
extension
is
needed
for
both
horizontal
left
and
right
applications.
DO
NOT
DISCARD.
FURNACE
ATTACHMENT
Attach
coil
to
furnace
The
attachment
plates
(3)
and
filler
plate
(1)
are
packaged
together
and
placed
in
the
coil
carton.
Remove
these
items,
verifying
the
number
of
pieces.
Use
the
following
procedure
to
attach
ENH4X
horizontal
coil
to
furnace.
NOTE:
Remove
shipping
brace
from
both
ends
of
casing
prior
to
installation.
Also
remove
corrugated
shipping
block
from
inside
the
right
end
of
casing
prior
to
installation.
1.
Three
attachment
plates
are
used
to
attach
coil
to
furnace.
Application
determines
which
end
of
the
coil
will
be
attached
to
the
furnace.
2.
Use
self-tapping
screws
to
mount
attachment
plates
to
coil
casing.
See
Figure
6.
484
01
3700
01
A05419
Figure
6
-
Mount
Attachment
Plates
3.
Connect
furnace
snugly
against
coil
casing.
4.
Use
self-tapping
screws
to
attach
furnace.
See
Figure
7.
Self-Tapping
Screws
Drill
After
Coil
—.
is
installed
i.
p
.
GSp
,
U
| |
!
i
A05420
Figure
7
-
Attach
Coil
to
Furnace
5.
Seal
joint
between
coil
casing
and
furnace
to
create
air-tight
seal
using
locally-approved
materials.
NOTE:
if
the
coil
and
furnace
are
different
widths,
refer
to
Figure
2
and
Figure
3.
HORIZONTAL
ATTIC
INSTALLATION
Construct
work
platform
to
support
coil/furnace
combination
1.
Construct
work
platform,
using
material
in
platform
that
will
support
the
weight
of
an
installer
or
a
service
person.
2.
Place
work
platform
in
front
of
discharge
end
of
furnace.
8.
Secure
platform
to
building
joists.
Install
coil
To
suspend
ENH4X:
1.
Cut
metal
plumbers
strap
to
desired
lengths.
2.
Attach
metal
plumbers
strap
to
four
corners
of
coil
casing
(see
Figure
8).
3.
Use
a
minimum
of
two
screws
per
corner
to
attach
plumbers
strap
to
casing.
4.
Position
and
secure
coil
in
front
of
furnace
discharge
end.
5.
Make
sure
coil
is
level
for
proper
condensate
drainage.
6.
Using
appropriate
fasteners
for
duct
type,
connect
supply-air
duct
to
coil.
HORIZONTAL
CRAWL
SPACE
INSTALLATION
As
an
alternate
to
horizontal
attic
installation,
the
ENH4X
horizontal
coil
can
be
installed
in
a
crawl
space
by
mounting
on
suitable blocks,
pads
or
by
hanging
from
floor
joists.
To
suspend
ENH4X:
1.
Cut
metal
plumbers
strap
to
desired
lengths.
2.
Attach
metal
plumbers
strap
to
four
corners
of
coil
casing.
See
Figure
8.
3.
Use
a
minimum
of
two
screws
per
corner
to
attach
metal
plumbers
strap
to
casing.
4.
Position
and
secure
coil
in
front
of
furnace
discharge
end.
5.
Make
sure
coil
is
level
for
proper
condensate
drainage.
6.
Using
appropriate
fasteners
from
duct
type,
connect
supply-air
duct
to
coil.
Plumbers
Strap
2
Screws
for
Attachment.”
to
Casing
A05421
Figure
8
-
ENH4X
Suspension
with
Plumbers
Strap
484
01
3700
01
REFRIGERANT
LINES
Refrigerant
lines
must
be
configured
per
local
building
codes
and
the
guidelines
outlined
in
the
OD
units
installation
instructions.
NOTE:
The
filter
dryer
should
be
placed
just
before
the
indoor
unit.
Connect
Refrigerant
Liquid
and
Suction
Lines
For
matched
and
mismatched
systems,
use
line
sizes
recommended
in
outdoor
unit
Installation
Instructions.
The
coil
can
be
connected
to
outdoor
units
using
accessory
refrigerant
line
sets
or
field-supplied
lines
of
refrigerant
grade.
See
Table
1
for
coil
connection
tube
size.
COIL
CONNECTION
TUBE
SIZE
Table
1
inches
(mm)
MODEL
NUMBER
Liquid
Suction
ENH4X24(C,T)17A
3/8
(10)
5/8
(16)
ENH4X30(C,T)17A
3/8
(10)
3/4
(19)
ENH4X31(C,T)17A
3/8
(10)
3/4
(19)
ENH4X36(C,T)17A
3/8
(10)
3/4
(19)
ENH4X42(C,T)21A
3/8
(10)
7/8
(22)
ENH4X43(C,T)21A
3/8
(10)
7/8
(22)
ENH4X48(C,T)21A
3/8
(10)
7/8
(22)
ENH4X60(C,T)24A
3/8
(10)
7/8
(22)
ENH4X61(C,T)24A
3/8
(10)
7/8
(22)
4&
CAUTION
UNIT
DAMAGE
HAZARD
Failure
to
follow
this
caution
may
result
in
product
damage.
To
avoid valve
damage
to
the
refrigerant
contro!
device
while
brazing,
valves
must
be
wrapped
with
a
heat-sinking
material
such
as
a
wet
cloth.
1.
Remove
cabinet
access
door.
2.
Remove
rubber
plugs
from
coil
stubs
using
a
pulling
and
twisting
motion.
Hold
coil
stubs
steady
to
avoid
bending
or
distorting.
3.
Wrap
TXV
and
nearby
tubing
with
a
heat-sinking
material
such
as
a
wet
cloth.
4.
Fit
refrigerant
lines
into
coil
stubs.
Wrap
a
heat
sinking
material
such
as
a
wet
cloth
behind
braze
joints.
5.
Use
1/2
psig
Nitrogen
purge
in
the
suction
and
out
the
liquid
line.
6.
Braze
using
a
Sil-Fos
or
Phos-copper
alloy.
Do
not
use
soft
solder.
7.
After
brazing,
allow
joints
to
cool.
Slide
rubber
grommets
over
joints.
Position
tubing
at
center
of
each
grommet
to
ensure
an
air
seal
around
the
tube.
8.
Always
evacuate
lines
and
reclaim
refrigerant
when
making
connections
or
flaring
refrigerant
lines.
Leak
check
connections
before
insulating
entire
suction
line.
9.
If
outdoor
equipment
will
not
be
installed
until
a
later
date,
braze
liquid
and
suction
lines
closed
outside.
Add
a
Schraeder
port
test
fitting
to
the
suction
line
outside.
CONDENSATE
DRAIN
LINE
CONNECTION
4&
CAUTION
PROPERTY
DAMAGE
HAZARD
Failure
to
follow
this
caution
may
result
in
property
damage.
When
installing
over
a
finished
ceiling
and/or
living
area,
install
a
field-fabricated
secondary
condensate
pan
under
the
entire
unit.
The
coil
is
designed
to
dispose
of
accumulated
water
through
built-in
condensate
drain
fittings.
It
is
recommended
that
PVC
fittings
be
used
on
the
condensate
pan.
Do
not
over-tighten.
Finger
tighten
plus
1-1/2
turns.
Be
sure
to
install
plastic
plug
in
unused
condensate
drain
fitting.
Two
3/4
inch
female
threaded
pipe
connections
are
provided
in
each
coil
condensate
pan.
A
trap
is
not
necessary
on
the
condensate
line.
Consult
local
codes
for
additional
restrictions
or
precautions.
If
local
codes
require
a
trap
then
the
following
guidelines
are
suggested
to
assure
proper
drainage.
Install
a
trap
in
condensate
line
of
coil
as
close
to
the
coil
as
possible.
Make
trap
at
least
3
inches
(76
mm)
deep
and
no
higher
than
the
bottom
of
unit
condensate
drain
opening
(See
Figure
9).
Pitch
condensate
line
1
inch
(25.4
mm)
for
every
10
feet
(8m)
of
length
to
an
open
drain
or
sump.
Make
sure
that
the
outlet
of
each
trap
is
below
its
connection
to
condensate
pan
to
prevent
condensate
from
overflowing
the
drain
pan.
Prime
all
traps,
test
for
leaks,
and
insulate
traps
and
lines
if
located
above
a
living
area.
A08067
Figure
9
-
Condensate
Trap
NOTE:
If
unit
is
located
in
or
above
a
living
space,
where
damage
may
result
from
condensate
overflow,
a
field-supplied,
external
condensate
pan
should
be
installed
underneath
the
entire
unit,
and
a
secondary
condensate
line
(with
appropriate
trap)
should
be
run
from
the
unit
into
the
pan.
Any
condensate
in
this
external
condensate
pan
should
be
drained
to
a
noticeable
place.
As
an
alternative
to
using
an
external
condensate
pan,
some
localities
may
allow
the
running
of
a
separate
3/4
inch
(19
mm)
condensate
line
(with
appropriate
trap)
per
local
code
to
a
place
where
the
condensate
will
be
noticeable.
The
owner
of
the
structure
must
be
informed
that
when
condensate
flows
from
secondary
drain
or
external
condensate
pan,
the
unit
requires
servicing
or
water
damage
will
occur.
To
further
protect
against water
damage,
install
a
float
switch
to
shut
the
unit
off
if
the
water
in
the
secondary
pan
gets
too
high.
NOTE:
To
avoid
drainage
problems,
test
the
primary
drain
line
by
slowly
pouring water
into
the
pan.
Check
piping
for
484
01
3700
01
leaks
and
proper
condensate
drainage.
Using
the
secondary
drain
as
explained
in
the
previous
note
provides
further
protection
against
overflow
due
to
a
clogged
primary
drain.
NOTE:
In
applications
where
return
air
humidity
levels
stay
at
70%
or
above
for
a
prolonged
period
of
time,
condensation
can
form
on
the
bottom
of
pan
and
drip.
WASTE
LINE
CONNECTION
If
the
condensate
line
is
to
be
connected
to
a
waste
(sewer)
line,
an
open
trap
must
be
installed
ahead
of
the
waste
line
to
prevent
escape
of
sewer
gases
(See
Fig.
10).
Air
Gap
Above
Liquid
Level
Condensate
§
Line
Trap
Sewer
Line
A10216
Figure
10
-
Condensate
Drain
to
Waste
Line
4
WARNING
EXPLOSION
HAZARD
Failure
to
follow
this
warning
could
result
in
personal
injury
or
death.
Provide
trap
with
air
gap
in
drain
line
when
connecting
to
waste
(sewer)
line.
484
01
3700
01
Digit
Position
6,7
9,10
12
E
=
Evaporator
B
=
Builder
D
=
Standard
N
=N
Coil
TYPE
A
=
Uncased
D
=
Cased
Upflow/Downflow
H
=
Cased
Horizontal
M
=
Cased
Multiposition
(Upflow/Downflow/Horizontal)
W
=
Cased
Upflow/Downflow
for
narrower
furnaces
INSTALLATION
4
=
Environmentally
Sound
R-410A
REFRIGERANT
P
=
Piston
X
=
TXV
METERING
DEVICE
18
=
18,000
BTUH
=
1%
tons
19
=
18,000
BTUH
=
1%
tons
24
=
24,000
BTUH
= 2
tons
30
=
30,000
BTUH
=
2%
tons
31
=
30,000
BTUH
=
2%
tons
36
=
36,000
BTUH
=
3
tons
37
=
36,000
BTUH
=
3
tons
42
=
42,000
BTUH
=
3%
tons
43
=
42,000
BTUH
=
3%
tons
48
=
48,000
BTUH
=
4
tons
60
=
60,000
BTUH
= 5
tons
61
=
60,000
BTUH
= 5
tons
NOMINAL
CAPACITY
18
C
=
Plain
Copper
L =
Aluminum
T
=
Tin
Coated
Copper
HAIRPIN
MATERIAL
14
=
14-3/16"
17
=
17-1/2”
21
=21”
24
=
24-1/2”
BB
=
15-1/2”
FF
=
19.1”
JJ
=
22.8”
LL
=
24-1/2”
WIDTH
14
Sales
Digit
(Major
Revision)
Engineering
Digit
(Minor
Revision)
ee
nternational
Comfort
Products,
LLC
484
01
3700
01
Lewisburg,
TN 37091
USA
