Amana AIR COMMAND 80 - FURNACE OPERATING INSTRUCTIONS; Starting and Stopping the Furnace; Gas Pressure and Input Measurement

PRESSURE
-
MANIFOLD
PRESSURE
ADJUSTMENT
R
L
OPERATING INSTRUCTIONS
1.
Close the
manual gas
valve
external
to the furnace.
2.
Turn off the
electrical
power
supply
to the furnace.
3. Set room thermostat to lowest possible setting.
4.
Remove the
door on
the front of the furnace.
5. This furnace is
equipped
with an ignition
device
which
auto-
matically
lights the
burner.
Do not try to light burner
by hand.
6.
Turn
the gas control valve
knob
clockwise/
to
"OFF"
position.
Do not force. See
Fig.
9.
7. Wait five (5) minutes
to
clear out
any gas.
8. Turn
gas
control
valve knob counter
clockwise !
\to
"ON."
See Fig. 9.
9. Replace the
door on
the front of
the furnace.
10. Open
the
manual
gas valve external to
the furnace.
11.
Turn on the electrical
power supply to the
furnace.
12.
Set the thermostat(s) to
desired
setting.
NOTE: There
is a one minute delay between
thermostat
energizing
and
burner
firing.
RESET AFTER LOCK
-OUT
Should
ignition not be achieved
after three tries for any rea-
son it
will
be
necessary
to
reset the electronic
ignition mod-
ule. To
reset it is only
necessary
to
turn the thermostat
below
room temperature for thirty
seconds and then return the
set-
ting to the desired
temperature. The
furnace may also be
reset after lockout by
disengaging the electric disconnect
switch to the furnace
for
thirty
seconds.
TO TURN OFF FURNACE
1.
Set the thermostat(s) to lowest setting.
2. Turn off
the
electrical power supply to the
furnace.
3. Remove the
door on
the front
of
the furnace.
4.
Turn
the gas
control
clockwise(~to "OFF" position. Do
not force. See
Fig.
9.
5.
Close manual gas shut off
valve
external
to the furnace.
6. Replace the
door
on the furnace.
INLET
GAS
,GAS
CONTROL
f.
-KNOB
--~
OFF
m
FLAME ROLL
-OUT
PROTECTION
(shown with
gas
valve removal)
Fig.
9 — Gas
Pressures.
CHECK
GAS
INPUT
AND
PRESSURES
Gas
supply pressure
and
manifold pressure with the
burners
operating must be as
specified
on
the
rating
plate.
ROLL -OUT PROTECTION CONTROL
If the flames from the burners are not
properly
drawn into
the
heat exchanger, a protection
device will open causing
the fur-
nace to shut off. The
protection
device
is
located
on
the
mani-
fold
assembly.
(See
Fig. 11)
A
CAUTION
The cause must
be
investigated by
an
Amana authorized
servicer
before any
attempt is made to engage
the
manual
reset device and turn
the unit
back on.
CHECK THE MANIFOLD PRESSURE
A
tapped
opening is
provided in the gas valve to
facilitate
measurement
of
the manifold
pressure.
A
"U Tube" manom-
eter having a scale
range
from
0 to
12
inches of water
should
be used for this
measurement. The
manifold
pressure must
be measured with the burners operating.
To adjust the
pressure
regulator,
remove the adjustment
screw or cover on
the gas valve. Turn
out (counterclockwise)
to
decrease pressure, turn in
(clockwise) to increase pres-
sure. Only small
variations
in gas flow
should
be made by
means
of
the pressure regulator
adjustment. In no case
should the
final
manifold
pressure
vary
more than
plus
or
minus 0.3
inches
water
column from
the specified pressure.
Any major
changes in flow should
be made by changing the
size of the burner
orifices.
(Fig.
9)
CHECK THE GAS INPUT
To measure the gas input
using
the gas
meter
proceed as
follows:
1. Turn off
gas
supply
to
all other appliances except
the
furnace.
2. With
the
furnace
operating,
time the smallest
dial on
the
meter for
one
complete revolution. If this is a 2 cubic foot
dial, divide
the
seconds by
2;
if it is a
1
cubic foot
dial,
use
the seconds as is.
This
gives the seconds
per cubit foot of
gas being delivered to the furnace.
3. INPUT = GAS HTG VALUE
x
3600
_
SEC.
PER
CUBIC
FOOT
Example:
Natural gas with a heating
value
of 1000 Btu per
cubic foot and
34
seconds
per
cubic foot as determined by
Step
2, then:
Input = 1000
x
3600
_
34
= 106,000 Btu per Hour
Note: BTU
content of
the gas should be obtained
from
the
gas supplier.
This measured input must not be
greater
than the input indi-
cated
on
the rating plate of the furnace.
4. Relight all other
appliances turned
off in
step
1
above.
Be
sure
all
pilot burners are operating.
LIMIT AND
FAN CONTROL
Fig.
10 — Fan
and Limit Control.
10