Coleman 7600 - Heat Exchanger Description; Heat Exchanger Replacement

INSTALLATION
INSTRUCTIONS
7660-575 HEAT
EXCHANGER
The 7660-575
heat exchanger
is constructed
with
stainless
steel balfles
installed around
its
lowcr,
interior
portion. This is to
give greater
protection
against
burnout
from continuous
contact
with the
burner
flame. Located
in the top
area ol
the
heat exchanger
is
a stainless
steel baffle
deflector
to
keep
the direct
upflow
of
heat from coming
into immcdiate
contact
with the top
of the
heat exchanger.
lt
also
slows
the
rising heat down before
it escapes
up the
l-lue.
REPLACING
THE 7660.575
HEAT
EXCHANGER
l. Turn off
the electrical
supply
to the
furnace.
2.
Turn oll the
gas
supply to
the
f'urnace.
3.
Disconnect
the
rooljack
from the
furnace.
a.
Remove the
screws
from the
roof
jack
hold-down
straps
and slidc
the combustion
air
pipe
up out of
the way.
b.
Remove the scrcw
from the vent-pipe
and slide
it up out ol
the way.
4. Disconnect
the
fuel line at
the union,
next to the
gas
control valve, and
from the
gas
supply
line
below
the
floor. Remove this
section
of
pipe
so that
the
furnace can be
removed
later.
5. Detach
electrical
supply and
thermostat
wires
from
the
furnace.
6.
Remove
the
lurnace blower
at this
time
by
(a)
dis-
connecting
the
electrical
leads
from
the blower,
(b)
removing the screws
from the
lower side
of the
angle
that
holds the
blor.r'er to
the
furnace,
(c)
sliding
thc
blower
lorward out
of the
I'urnace
and
setting
it out of the
way.
7. Remove
the
two
panels from the
coil
cavity
of the
furnace.
8.
Remove
the
duct chute
and
duct
connector
from the
bottom
of the
furnace.
Take the
four
screws
out
of
the
top of the
duct chute
and
lilt out.
9.
Detach
the
lurnace
straps,
located
at top,
back
corners
of
furnace.
l'rom the
wall.
10.
Remove
the
two nails
or screws
used
to anchor
the
furnace to
the floor.
Each
anchor
is located
just
a
lew inches
back
from the
front corners
of the
base
of the
furnace.
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