Amana AIR COMMAND 80 - PROPANE GAS SYSTEM INSTALLATION; Propane Gas System Warnings

8.
The furnace shall
be
connected to the building piping
by
one of
the
following:
a.
Rigid
metallic
pipe and
fittings.
b.
Semirigid metallic
tubing
and metallic fittings. Alumi-
num alloy tubing shall
not be used in exterior
locations.
c.
Listed gas
appliance connectors
used in
accordance
with
the terms of their listing that
are completely in the
same
room
as the
equipment.
d. In "b" and "c"
above,
the connector or
tubing shall be
installed so as
to be
protected against physical and
thermal
damage. Aluminum -alloy tubing and connec-
tors shall
be coated
to protect against external
corro-
sion
where they are
in contact with masonry,
plaster,
or insulation or
are
subject
to repeated
wettings by
such
liquids as
water (except
rain water),
detergents
or
sewage.
LOCATION
OF
MANUAL VALVE
ONLY WHERE REQUIRED
HEIGHT
AS
REQUIRED
BY
LOCAL CODE
GROUND
JOINT
PIPE
UNION
TO BE
INSTALLED AHEAD
OF
GAS VALVE
DRIP
LEG
REDUCING COUPLING
1
/
2
" x 1 /~" WITH
Ye" PIPE
PLUG
TO
MEASURE
LINE GAS
PRESSURE.
Fig.
6
CHECKING THE GAS
PIPING
A
CAUTION
To
avoid the possibility
of
property
damage,
personal
injury or
fire, the
fol-
lowing instructions must be
performed
regarding
gas connections,
pressure
testing, location of shutoff valve and
installation of
gas
piping.
A
A
A
A
The
unit and its gas connections must be leak tested
before placing in operation. Because
of
the
danger of
explosion or
fire,
never
use
a match
or
open
flame
to
test
for
leaks.
Never exceed specified
pressures
for
testing.
Higher
pressure may damage the
gas
valve
and
cause overfiring which may result in heat
exchanger
failure.
This
unit and its individual shut-off valve
must be dis-
connected
from
the
gas supply piping
system during
any pressure
testing of
that system at test pressures
in
excess
of psig (3.48
kPa).
This unit must be
isolated from
the
gas supply system
by closing its
individual
manual
shutoff
valve during
any pressure testing of the gas supply piping
system
at
test
pressures
equal to or less than
'h
psig
(3.48 kPa).
The
shut off
valve should be located in a
convenient
location (within
(6)
six
feet
of
unit) between
the meter
and
the unit. Proper sizing of
gas piping
depends
on
the cubic feet per
hour
of gas flow
required, specific
gravity of
the
gas and the length of the run.
Lay
out
the
piping plan and refer to
the
National
Fuel Gas
code
manual to
obtain
the correct
pipe
sizing for
each
branch
run, etc.
TANKS
AND
PIPING -
PROPANE UNITS
All propane gas
equipment must
conform
to the safety stand-
ards
of the National Board
of
Fire
Underwriters (See
NBFU
Manual
58).
For
satisfactory operation, propane gas pressure
must
be 10
inch W.C.
at
the
furnace manifold
with all
gas
appliances in
operation. Maintaining
proper gas
pressure
depends on
three
main factors:
1. Vaporization rate,
which depends on (a) temperature
of
the
liquid, and (b)
"wetted surface" area of the
container or
containers.
2.
Proper
pressure
regulation. (Two
-stage
regulation
is
rec-
ommended
from the standpoint of
both cost and
efficiency.)
3.
Pressure drop in lines
between regulators,
and
between
second stage
regulator
and
the appliance. Pipe
size
required will depend
on length of pipe run and
total
load
of
all
appliances.
Complete information
regarding tank sizing for vaporization,
recommended
regulator settings, and pipe sizing is available
from most
regulator manufacturers and
propane gas
suppliers.
Propane is an excellent
solvent,
and special pipe dope must
be
used when assembling piping
for
this gas as it
will quickly
dissolve white
lead
or most standard
commercial
com-
pounds.
Shellac base compounds resistant to the actions
of
liquified petroleum gases such as Gasolac, Stalactic, Clyde's
or
John
Crane are
satisfactory.
Please refer to
Fig. 7 for typical propane gas
installations.
Fig. 7—
Typical Propane Piping
S ' O 'S POUNDS
PRESSURE
..E RE
SEVER.1
POUNDS
v.R,%r,ON WON'
NURf
BU'
DON'
oo
OVER
]0
POUNDS
PROPANE
PIPING CHARTS
Sizing Between First and Second Stage Regulator
Maximum
Propane Capacities listed are based on 2
PSIG Pressure Drop
at 10
PSIG
Setting.
Capacities
in
1,000
BTU/HR
PIPE
OR
TUBING
LENGTH
FEET
TUBING SIZE.
O.D.. TYPE
L
9001601.
5000051.0
1/2'
PIPE SIZE.
40
3/4• 3/8' l/2" 5/8
3/4'
7/8'
10
730 1.700 3.200 5.300
8.300 1.200
7.500
2 500
1.100
2.200
3.700
5.800
2.200
4.200
30
400
920
2.000
7.900
4.700
1.800
4
000
40
370
850
1.700
7.700 4.100
1.600 3
100
50
330
770
1.500
2.400
3.700 1.500 3.400
60
300 700 1.300
2.200
3.300 1 300
3.100
80
260 610 1.200 1.900
2.900 1.200
2.600
100 220 540
1.000
1700 2.600 1.000
2.300
125
200 490 900
1.400 2.300
900
2.100
150 190 430 630
1.30O
2.100 830 1.900
75
170
400
780
1.250 1.900 770 1.700
200
160 360 730
1.100 1.800
720
1.500
To
Conver
to
Capacities
at 15
PSIG Settings —
Multiply
by 1.130
To Convert to
Capacities at 5 PSIG
Settings —
Multiply
by 0.879
8