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4.
(
6.
7.
With
plate held in place, fasten plate to
ducting
using screws or
staples
as need
to
keeP
it
flat.
lnstall three duct adapters into flex adapter plate.
Attach flexible ducting from furnace to
ilex
adapter plate and secure
ducting
in place on both ends.
Additional ducting can be used
to
maintain correct static pressure or
as desired.
PROPANE
GAS
CONNECTION
1.
Connect gas line to brass
fitting
located on right side of
Jurnace.
2.
Some models
will
have
fittings
at
the
rear or right side outside of the
casing.
3.
Be
suie
all male pipe threads, other than
llare fittings,
are treated
with
a sealing
compound
resistant to the action of propane
(LP)
gas.
DO NOT put sealing compound on flare fittings.
4.
Use two wrenches
to
hold brass
fitting
and
flare
nut
when tightening
gas
line to brass
fitting.
DO NOT iwist valve assembly.
Figure
9
.
A
1/B"
N.P.T. plug is accessible for
test
gauge connection on gas
valve assembly
for
pressure testing.
r
A 3/8" flared
fitting
connection is provided at gas control valve inlet
for gas supply connection to furnace. The gas
supply
line of the
furnace
must be of adequate size to
provide
1
1"
W.C.
gas pressure.
This
pressure must be
mainiained
under maximum
llow
conditions
with all gas appliances in operation.
.
Remove
slide
plate and gas inlet plug from furnace.
.
lnsert gas line
ihrough
gas inlet
plug
(DO NOT CUT).
o
Connect gas line through gas inlet plug inside furnace casing
immediately ahead of gas control valve.
ELECTRICAL
CONNECTIONS
A
wanNrNrc
INJURY
OR PROPERTY
DAMAGE
.
Label
all
wires before disconnecting
for
servicing. Wiring
errors
can
cause improper
and
dangerous
operation. Verify
proper
operation after servicing.
.
Disconnect electrical power before servicing.
CONDUCTOR SIZING
TABLE
-
Maximum
10%
Voltage
Drop
-
(12VDC)
A
"ou,o*
PROPERTY
DAMAGE
This connection
is
for
low-voltage battery or direct current only.
Do not connect
to
120 or 240 volts AC.
.
This furnace is designed
for
negative
ground
12
volts
DC
only.
DO
NOT attempt
io
alter
lurnace
for
a
positive ground system or
connect the
f
urnace directly
to
120 volts
AC.
Damage to furnace
components
will
occur and warranty will be voided.
.
Use a minimum of
1B
GA wire to minimize voltage drop. Furnace
must be installed so electrical components are protected from
water. To make electrical connections see wiring diagrams.
.
For best
furnace
performance when power supply
is
from
a
converter equipped with
a
charging port, wire converter to furnace
parallel
with
battery.
This
provides consistent voltage to-furnace,
increasing component life, filtering power surges and AC spikes'
.
Some models are shipped with
a
lield
harness connections
with
12"
wire
leads on
a
terminal
block.
.
AII units are supplied
with
a
power switch which when
turned
off
during
servicing
will
remove power through furnace
wiring.
Switch
must be in the ON position for furnace to operate.
.
The
direct
high voltage spark ignition generates a radio
lrequency
that
could
cause
interference with other microprocessor-based
equipment. Locate equipment at least five
feet
(5') from furnace
locaiion.
lf
this distance cannot be maintained
a
shielded high
voltage
lead
can
be
ordered.
See parts
list.
1.
Route wiring
to
left side
of
lurnace.
2.
Connect red wire to positive side of power supply.
3.
Connect black wire to grounded side of power supply.
4.
Connect blue wire marked positive thermostat to + side wire of
thermostat
using 22-18 GA stranded wire.
5.
Connect other blue wire to the other
thermostat
lead-using minimum
22-18 GA stranded wire.
POWER SUPPLY
Atwood Mobile Products highly recommends
the
use of an electronic
(solid state) converter with
clean
power output. This will assure
the
li{e
of
ihe
electronic
controls and
motor life
could
be extended beyond typical
linear converter applications.
THERMOSTAT INSTALLATION
o
Thermostats
are
not supplied. To purchase
a
thermostat
rated
for
12VDC
or
24VAC, Minimum
1
AMP rating,
they can be ordered
through
Atwood.
See Parts
list.
o
Be sure all electrical power has been disconnected
lrom the
air
conditioner,
furnace,
and
the
power supply.
.
The thermostats are very
sensitive.
HANDLE
WITH
CARE AT ALL
TIMES.
.
Pick
a
dry area where air circulation
is
good.
.
Do not install the thermostat where
there
are unusual heating
conditions: such as direct sunlight, heat producing appliances
(television, radio,
wall
lamp, etc.) or
a
furnace or air conditioner
output
registers.
Locate
thermostat
48" to 54" above main living area
iloor
on
an
INTERIOR wall
when
possible.
EXTERIOR
wall
location must have a 3/4" spacer between
thermostat and exterior wall.
Follow
manufacture's
installation instructions provided with
thermostat.
Current
draw
(AMPS
Amps
4
5
b
7
8
9
10
iE
Gaqe
Max. Lenqth of SAE
conductor
(ln
feet)
from
source
18
F,7
43
34
29
25
21
19
17
'1
1
16
87
65
az
/a
ca
29
26
17
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