GM9S80 Service Manual

SYSTEM OPERATION
20

National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition
and in the National Standard of Canada, CAN/CGA B149.1
and CAN/CGA B149.2 - latest editions and amendments.
To install the liner, read and follow the liner manufacturer’s

󰀨


liner as recommended by the liner manufacturer.
     󰀨  
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

It is required by the liner manufacturer’s instructions.
The previous liner was properly sized and installed,
󰀨
It is required by your local building codes.
-
ditional 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.

without insulation are likely to have condensation
problems.
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.

Horizontal applications, in particular, may dictate many of



Furnaces have provisions allowing for electrical and gas line
connections through either side panel. In horizontal applica-





-



-
ural gas at standard altitude. Propane gas installations re-
-
󰀨
High altitude installations may require both a pressure
        -
sary to compensate for the natural reduction in the density
of both the gas fuel and the combustion air at higher altitude.
Refer to the Accessories Charts in this manual or prod-
        
manufacturer’s kits for propane gas and/or high altitude in-
stallations. The indicated kits must be used to insure safe
and proper furnace operation. All conversions must be per-












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 con-
version kits required for alternate fuels and/or high altitude.




Inlet gas supply pressures must be maintained within the
-
-
ances operating. The minimum gas supply pressure must


Natural Gas Minimum: 4.5" w.c. 
Propane Gas Minimum: 11.0" w.c. 


When this furnace is installed at high altitude, the appropri-

due to the natural reduction in the density of both the gas
fuel and combustion air as altitude increases. The kit will