48
18-CE12D1-1D-EN
Table 9. Supply Duct Connections
Upflow Furnace with Coil
C
CA
AU
UT
TIIO
ON
N
C
CO
OIIL
L R
RE
EQ
QU
UIIR
RE
EM
ME
EN
NT
T!!!!
F
Fa
aiillu
urre
e tto
o ffo
ollllo
ow
w tth
hiiss C
Ca
au
uttiio
on
n cco
ou
ulld
d rre
essu
ulltt iin
n
p
prro
op
pe
errtty
y d
da
am
ma
ag
ge
e o
orr p
pe
errsso
on
na
all iin
njju
urry
y..
4
4G
GX
XC
C*
* a
an
nd
d 4
4M
MX
XC
C*
* cco
oiillss iin
nsstta
alllle
ed
d o
on
n u
up
pffllo
ow
w
ffu
urrn
na
acce
ess iin
n v
ve
errttiicca
all,, h
ho
orriizzo
on
ntta
all lle
efftt,, o
orr h
ho
orriizzo
on
ntta
all
rriig
gh
htt o
orriie
en
ntta
attiio
on
nss w
wiitth
ho
ou
utt a
a ffa
acctto
orry
y iin
nsstta
alllle
ed
d m
me
etta
all
d
drra
aiin
n p
pa
an
n ssh
hiie
elld
d m
mu
usstt u
usse
e a
a M
MA
AY
Y*
*F
FE
ER
RC
CO
OL
LK
KIIT
TA
AA
A kkiitt..
C
Co
oiillss iin
nsstta
alllle
ed
d o
on
n u
up
pffllo
ow
w ffu
urrn
na
acce
ess m
mu
usstt h
ha
av
ve
e d
drra
aiin
n
p
pa
an
nss tth
ha
att a
arre
e ssu
uiitta
ab
blle
e ffo
orr 4
40
00
0°° F
F ((2
20
05
5°° C
C)) o
orr h
ha
av
ve
e a
a
m
me
etta
all d
drra
aiin
n p
pa
an
n ssh
hiie
elld
d.. D
Do
ow
wn
nffllo
ow
w ffu
urrn
na
acce
ess d
do
o n
no
ott
rre
eq
qu
uiirre
e a
a m
me
etta
all d
drra
aiin
n p
pa
an
n ssh
hiie
elld
d o
orr tth
he
e u
usse
e o
off tth
he
e
M
MA
AY
Y*
*F
FE
ER
RC
CO
OL
LK
KIIT
TA
AA
A kkiitt.. S
Se
ee
e IIn
nsstta
alllle
err’’ss G
Gu
uiid
de
e ffo
orr
m
mo
orre
e iin
nffo
orrm
ma
attiio
on
n..
1.
Bend furnace flanges up.
1.
Set the coil on top of the furnace.
2.
Screw through the coil cabinet into the furnace flange. Guide
holes are located on the coil.
Note:
There are no longer guide holes located on the furnace flange.
3.
Seal per local codes and requirements.
Upflow Furnace without Coil
1.
Bend furnace flanges up.
2.
Seal per local codes and requirements.
3.
Insulate the first 6–12 inches of the supply duct.
Caution. The first 6–12 inches of the supply duct must be insulated to
protect from high temperatures.