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3. Outdoor
openings
shall be sized
as %llows:
a. (alculate
the Ratio
of all Indoor
Space volume
divided
by
required
volume
fbr Indoor
(ombustion
Air
Method
below.
b. Outdoor
opening
size rednction
Factor
is 1 minus
the
Ratio
in a. above.
c. Minimum
size
of Outdoor
openings
shall
be
the
size
required
in Outdoor
Combus{ion
Air
Method
above
multiplied
by reduction
Factor
in b. above.
The mininlnnl
dimension
of air openings
shall be not tess than 3 in. (80
111111)
0
BNSTALLATION
Step
l--Leveling
Legs
(If Desired)
When furnace
is used in opflow position
with side inlet(s),
leveling
legs
may
be
desired.
(See
Fig.
19.)
Install
field-supplied,
corrosion-resistant
5/16-im
machine
bolts
and nuts.
NOTE:
The nlaximmll
length
of bolt should
not exceed
1- 1/2 in.
1. Position
flmaace
on its
back.
Locate
and
drill
a 5/16=in.
diameter
hole in each bottom
corner
of furnace.
(See Fig. 19.)
Holes
in bottom
closure panel may be used as guide
locations.
2. For each hole. install
nut on bolt and then install bolt and nut
in hole. (Install
flat washer
if desired.)
3. Install
another
nut on other side of fl/mace
base.
(Install
flat
washer
if desired.)
4. Adjust
outside nut to provide
desired
height,
and tighten
inside
nut to secure
arrangement.
NOTE:
Bottom
closure must be used when leveling
legs are used
See Bottom
Closure
Panel
section
Step
2--_nstaHation
in Upfiow
and
Downflow
Applications
NOTE:
For downflow
applications,
this fhrnace
is approved
for
use
on combustible
flooring
when
special
base
(available
fl'om
manufacturer)
Part No. KGASB0201ALL
is used.
Special
base in
not required
when
dlis fhmace
is installed
on manufacturer's
(?oil
Assenlbly
Part No. CD5 or CK5, or (;oil Box Part No. KCAKC
is
used,
1. Determine
application
being
installed
from Table
3.
2. (onstruct
hole in floor per dimensions
specified
in Table
3
and Fig. 20.
Fig, 19--Leve{ing
Legs
A89014
18
3. (onstruct
plenum
to dimensions
specified
in Table
1 and Fig.
20.
4. If downflow
subbase
(KGASB)
is used,
install
as shown
in
Fig. 2!.
If (oil Assembly
Part No. CD5 or CK5 or Coil Box Part No
KCAKC
is used,
install
as shown
in Fig. 22.
NOTE:
Remove
t:umace
perR_rated,
discharge
duct flanges
when
they interfere
with mating
flanges
on coil on downflow
subbase.
To remove
fi/rnace
perforated,
discharge
duct
flange,
use wide
duct pliers
or dtlct flange
tool to bend
flange
back and forth until
it breaks
off_ Be carefld
of sharp
edges.
(See Fig. 23.)
UNIT
MAY
NOT
OPERATE
Failure
to follow
this caution
could result
in intermittent
unit
operation.
Do not bend
duct flanges
inward
as shown
in Fig
23
This
will affect airflow
across heat exchangers
arid may cause limit
cycling
or premature
heat
exchanger
fifilure.
Remove
duct
flange
completely
or bend
it inward
a nlininlnm
of 2!0 ° as
shown
in Fig, 23
Step
3--hstaHation
in Horizontal
Applications
tNIT
MAY
NOT
OPERATE
Failure
to %llow
tllis caution
may result
in intermittent
unit
operation.
The
entire
length
of flmlace
MUST
be
supported
when
furnace
is used
in a horizontal
position
to ensure
proper
draining.
When
suspended,
bottom
brace
supports
sides and
center blower
shelf
When unit is supported
fi'om file ground,
blocks
or pad should
support
sides and center
blower
shelf
area.
These furnaces can be installed horizontally
in either horizontal
left or right discharge position. In a crawlspace, fmnace can either
be hung from floor joist or installed on suitable blocks or pad.
Furnace can be suspended flora each corner by hanger bolts and
angle iron supports. (See Fig. 24.) (Jut hanger bolts (4 each 3i8=im
all=thread rod) to desired length. Use 1 X 3i8=im flat washers.
3/%in. lockwashers,
and 3/8=in. nuts on hanger rods as shown in
Fig. 24. Dimples are provided for hole locations. (See Fig. 2.)
Step
4-==Air Ducts
GENERAL
REQUIREMENTS
The
duct
system
should
be
designed
and
sized
according
to
accepted
national
standards
such
as those
published
by:
Air
Conditioning
Contractors
Association
(ACCA),
Sheet
Metal
arid
Air Conditioning
ContIactors
National
Association
(SMACNA)
or
American
Society- of Heating,
Refrigerating
and Air Conditioning
Engineers
(ASHRAE)
or consult
The Ai_' 5)',slems DesNr_ Gzdde-
[i_ves refkrence
tables
available
fi'om your
local
distributor.
The
duct system
should
be sized to handle
the required
system
design
CFM at the design
static pressure.
When
a furnace
is installed
so that the
supply
ducts
caia T air
circulated
by the furnace
to areas outside
_he space containing
the
Nrnace,
the remm
air shall also be handled
by a duct(s)
sealed
to
the furnace
casing and temlinating
outside
the space containing
the
furnace
Secure
ductwork
with proper
fasteners
for type of ductwork
used.
Seal
supply°
and return-duct
connections
to furnace
with
code
approved
tape or duct sealer.
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