Pilot Adjustment; Gas Conversion Instructions; Conversion From Natural To Lp Gas; Conversion From Lp To Natural Gas - Coleman 7600 Service Manual

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