34
10. Properly size gas pipe to handle combined appliance load or
run gas pipe directly from gas meter or Propane gas
regulator.
NOTE
: Refer to Fig. 37 or Fig. 38 for the general layout at the
furnace. The rules listed apply to natural and Propane gas pipe
installations.
NOTE
: On the Dual Certified or Direct Vent models, install the
gas pipe grommet to the furnace side panel with the gas pipe entry.
If needed, remove the 2
″
(50.8mm) hole plug from the plastic
accessory bag and relocate to the open hole in the furnace side
panel.
11. Install correct pipe size for run length and furnace rating.
12. Measure pipe length from gas meter or Propane second stage
regulator to determine gas pipe size.
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury
or death.
Failure to properly install metal gas connector could
result in personal injury, death, and/or property
damage.
A flexible corrugated metal gas connector must be
properly installed, shall not extend through the side of
the furnace,and shall not be used inside the furnace.
Black iron pipe shall be installed at the furnace gas
control valve and extend a minimum of 2
″
(50.8mm)
outside furnace casing.
!
WARNING
Manual shut- off
valve
Use elbows and 3
″″
(76.2mm) pipe nipple
to connect valve to piping when using
right side gas pipe entry.
* Union may be installed inside the cabinet when necessary because of clearances.
Drip Leg and Union, Union* should be outside the
cabinet. Manual shut--off valve MUST be upstream of
dripleg, union, and furnace.
Propane low pressure switch.
Vent Pipe Grommet
(Single Pipe)
3
″
(76.2mm)
pipe nipple
25--25--45
Alternative
installation
Representative drawing only, some models may vary in appearance.
A09196
Fig. 37 -- Typical Gas Piping for Upflow
58H
D
V
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