Coleman 7600 - Pilot Adjustment; Gas Conversion Instructions; Conversion from Natural to LP Gas; Conversion from LP to Natural Gas

PILOT
ADJUSTMENT
The
pitot
flame should
be adjusted
to bathe
the end
of
the
pilot
thermocouple
with approximately
t/r"
of
f)ame.
The
pilot
flame should appear
blue
on
natural
gas,
and
blue with
yellow
tips
if operating
on
L.P.
gas.
Remove
the
pilot
adjusting
screw cover
cap
from the
control
valve
and adjust
the underlying
screw
to obtain
the
proper
pilot
flame. Replace
the cover cap
in
the control
valve.
GAS CONVERSION
INSTRUCTIONS
The
PRESIDENTIAL series
furnaces
are equipped
to burn either
natural
gas
or
[-P
gas. By
using
the
proper
orifice and
adjusting
the
pressure
regulator
and
pilot,
the
furnace can be converted
to burn either
gas.
For LP
gas,
an LP
gas
identification
tag should be
wired
to the
burner
manifold, the orilice
in
the burner
should be
marked
"t-P,"
and the
pressure
converter
should
be
adjusted
to the
"LP"
position.
For
natural
gas,
a
Natural
gas
identification
tag should
be wired
to the
burner
manifold, the
orifice
in
the
burner
should
be
marked
"NAT,"
and
the
pressure
converter
should
be adjusted
to the
"NAT"
position.
The extra orifice
and
gas
identification
tag are
in
the
cloth
bag attached
to
the
pilot line.
CONVERSION
FROM NATURAL TO LP GAS
l. Be sure
gas
and electricity to appliance
is
shut
off.
2. Disconnect
pilot
fecd tube from valve.
3.
Remove the two screws holding
valve
to
valve
bracket and
pull
valve with orifice
holder back and
out of burner
support exposing the
orifice.
Change
to burner
orifice marked
LP. found
in
the cloth
bag attached
to the
pilot
line.
4.
Reverse valve regulator
pressure
converter to
read
LP Gas.
See
Fig. 6.
5. Push orifice
holder back
in
place
and replace
thc valve with the
t\\'o screws
previously
removed.
Connect
pilot
feed tube to valve.
Be sure
all con-
nections are
tight.
6.
Wire LP identification
tag to
pilot line.
7. Store
replaced orifice and
Natural
gas
identifi-
cation
tag in cloth
bag
and
attach
to
pilot
line.
8. Use
pilot
adjusting
screw
to
adjust
pilot
flame.
See
pilot
adjustment.
CONVERSION
FROM LP
TO
NATURAL
GAS
l.
Be
sure
gas
and
electricity to appliance
is shut
olf .
Disconnect
pilot
feed
tube
lrom valve.
Remove the two screws
holding valve
to valve
bracket and
pull
valve with orilice
holder back
and
out of
burner support exposing
the orifice. Change
to burner
orilice
marked Nat. found
in the
cloth
bag
attached to the
pilot
line.
INSTALLATION
INSTRUCTIONS
4. Reverse
valve
regulator
pressure
converter
to
read Nat.
Gas.
See
See
Fig.
5
5. Push orilice
holder
back
in
place
and
replace
the
valve
u'ith the two
screws
previously
removed.
Connect
pilot
feed tube
to valve.
Be sure all
con-
nections are
tight.
6. Wire Natural
gas
idcntification
tag
to
pilot line.
7.
Store
replaced orifice
and
LP
gas
identil'ication
tag
in
cloth
bag and attach
to
pilot line.
8. Use
pilot
adjusting
screw
to adjust
pilot
flame.
Sce
pilot
adjustment.
THE
7660-528
BURNER
The 1660-528 burner is a
mono-port type burner with
a stainless steel
flame spreader
mounted
above
the
burner
port
to spread the flame out
nearer
the
walls
of
the
heat exchanger. Just
inside the burner
port
is
a flame retainer that
holds
a
portion
of
the
gas
flame
down around the burner
port.
The flame
should
be slightly
yellow
while the
furnace
is
operating.
The
burner
flame should
not rumble
or
roar like a blow torch
(furnace
receiving too
much
combustion
air). The air
shutter
adjustment
may be
pushed
in
to
provide
more
primary
air and
pulled
out
to reduce the amount of
primarl'
air being delivered
to
the burner
flamc. This
adjustment
depends upon the
average winter
temperature
and
thc
geographical
loca-
tion of the
furnace.
2.
J.
a
ll