Loading ...
Loading ...
Loading ...
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
Loading ...
Loading ...