Coleman 7600 - Page 7

APPLICATION
The
telescoping
flue
pipe
must be firmly seated
on the
furnace
flue
collar
and
secured with
a sheet
metal
screw. The telescoping
combustion
air tube
should be
pulled
down
and sealed
against
the top of the air
chamber
located inside the
top of
the
furnace.
The straps,
attached
to the
combustion
air tube. should
be
secured
to the top of the
furnace with
sheet
metal screws.
Sheet
metal
screws
should
not be longer
than
%
inch.
Problems
assoc'ialecl
u'ith intproper roo./
jack
installation.
Problem:
The main
burner comes on
normally.
Main burner flame and
pilot
flame begins
to lift
immediately,
and
floats to
the
top
of
the
heat
ex-
changer
then
goes
out.
Cause:
This is an indication
that:
L The inner
flue tube is missing or has not
been
securely
sealed to the flue outlet of the
furnace,
2.
blocked flue.
This results
in
a
recirculation
of
flue
gases
and
extinction
of main
burner and
pilot.
Solution:
l. Replace
inner flue tube,
2. Secure
the flue tube
to the flue outlet of
the
furnace,
3.
Remove
block.
Problem:
Pilot outage.
Cause:
Combustion air
tube not
installed
or
not
sealed against
the top of the air
chamber
located
inside the top of the
furnace.
Reason:
l. Different
pressure
zone. Downdraft
will ex-
tinguish
pilot.
2. Drawing
combustion
air
from inside the
home.
Defeats
the
purpose
of
sealed combustion.
Solution: Combustion air
tube should be
installed
and
sealed
against
the top
of
the air chamber
located
inside
the
top
of the
furnace.
A
cut-a-way drawing
of the
roof
jack
is
shown
in
Figure 2.
Figure
2
CUTA.WAY OF
THE
7660-7101 ROOF JACK