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Pitch
condensate
line
1
inch
(25.4
mm)
for
every
10
ft.
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.
AQ8067X
Figure
6
-
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
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
Figure
7).
Air
Gap
Above
Liquid
Level
Condensate
§&
Line
|
Sewer
Line
A10216
Figure
7
-
Condensate
Drain
to
Waste
Line
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.
Humidifier
Application
When
installing
a
humidifier
in
a
system
which
contains
an
N-coil,
consideration
must
be
given
to
location
of
coil
slabs.
See
Fig.
8.
1.
The
humidifier
should
be
mounted
to
the
supply
plenum
or
return
duct
whenever
possible.
If
necessary,
humidifiers
can
be
mounted
to
the
left
side
of
coil
casing.
The
right
side
of
the
coil
casing
must
not
be
used
to
mount
the
humidifier.
2.
Care
must
be
taken
to
prevent
damage
of
N-coil
when
attaching
humidifier
to
coil
casing
or
plenum.
3.
Ensure
that
humidifier
has
adequate
airflow.
Evaporator
N-Goil
—+
Upflow
Furnace
Ce
A05414
Figure
8
-
Installation
of
Humidifier
in
System
with
N-Coil
484
071
3600
00
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