Gas Supply And Piping - Amana GUI* Installation Instructions Manual

used. Common sources of chlorine and fluorine com-
pounds include indoor swimming pools and chlorine
bleaches, paint strippers, adhesives, paints, varnishes,
sealers, waxes (which are not yet dried) and solvents
used during construction and remodeling. Various
commercial and industrial processes may also be
sources of chlorine/fluorine compounds.
•
Heavier gauge 300 and 400 series stainless steel
liners were developed for use with oil or solid fuel
appliances. They are not suitable for use with gas-fired
appliances. Flexible liners specifically intended and
tested for gas applications are listed in the UL "Gas and
Oil Equipment Directory". (UL Standard 1777).
For sizing of flexible liners, see Note 22 and the tables in the
National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest
edition and in the National Standard of Canada, CAN/CSA
B149.1 and CAN/CSA B149.2 - latest editions and amend-
ments.
To install the liner, read and follow the liner manufacturer's
instructions and your local codes. Excess liner length
should be pulled out of the chimney and cut off. Use caution
when doing this, as the cut edges of flexible liners may be
sharp. Do not spiral excess liner inside of the chimney.
Support the liner as recommended by the liner manufac-
turer.
Some manufacturers of flexible liners offer an insulation
sleeve designed to be added to the liner before it is installed
in the chimney. (Poured insulation, either vermiculite or
other materials, is no longer recommended.) Insulation will
need to be added to the flexible liner if:
•
It is required by the liner manufacturer's instructions.
•
The previous liner was properly sized and installed,
and suffered from condensation damage.
•
It is required by your local building codes.
Even if none of those three conditions exist which require
additional liner insulation, the installer may wish to consider
it if:
• The local climate is very cold.
• The chimney is very tall.
• The vent connectors used are very long or have a large
number of elbows.
• Local experience indicates that flexible liners installed
without insulation are likely to have condensation prob-
lems.
Insulation must be selected and installed in accordance
with the liner manufacturer's instructions.
Finally, cap the chimney and terminate the liner in accor-
dance with the liner manufacturer's instructions.
VI. Gas Supply and Piping
GENERAL
The furnace rating plate includes the approved furnace gas
input rating and gas types. The furnace must be equipped
to operate on the type of gas applied. This includes any
conversion kits required for alternate fuel and/or high alti-
tude.
CAUTION
To prevent unreliable operation or
equipment damage, the inlet gas supply
pressure must be as specified on the unit
rating plate with all other household gas
fired appliances operating.
Inlet gas supply pressures must be maintained within the
ranges specified below. The supply pressure must be
constant and available with all other household gas fired
appliances operating. The minimum gas supply pressure
must be maintained to prevent unreliable ignition. The
maximum must not be exceeded to prevent unit overfiring.
Natural Min. 5.0" W.C., Max. 10.0" W.C.
Propane Min. 11.0" W.C., Max. 13.0" W.C.
NOTE: Adjusting the minimum supply pressure below the
limits in the above table could lead to unreliable ignition.
Gas input to the burners must not exceed the rated input
shown on the rating plate. Overfiring of the furnace can
result in premature heat exchanger failure. Gas pressures
in excess of 13 inches water column can also cause
permanent damage to the gas valve.
IMPORTANT NOTE: The furnace will naturally derate itself
with altitude. Do not attempt to increase the firing rate by
changing orifices or increasing the manifold pressure. This
can cause poor combustion and equipment failure.
At all altitudes, the manifold pressure must be within 0.3
inches WC of that listed on the "Specification Sheet" for the
fuel used. At all altitudes and with either fuel, the air
temperature rise must be within the range listed on the
furnace nameplate.
High Altitude Derate
When this furnace is installed at high altitude, the appropri-
ate High Altitude orifice kit must be applied. This is required
due to the natural reduction in the density of both the gas
fuel and combustion air as altitude increases. The kit will
provide the proper design certified input rate within the
specified altitude range.
12
Inlet Gas Pressure