Gas Supply And Piping - Rheem Gra Series Installation Instructions Manual

GAS SUPPLY AND PIPING

GAS SUPPLY
WARNING
!
THIS FURNACE IS EQUIPPED AT
THE FACTORY FOR USE ON
NATURAL GAS ONLY.
CONVERSION TO LP GAS
REQUIRES A SPECIAL KIT
SUPPLIED BY THE DISTRIBUTOR
OR MANU-FACTURER. MAILING
ADDRESS IS LISTED ON THE
WARRANTY. FAILURE TO USE
THE PROPER CONVERSION KIT
CAN CAUSE FIRE, CARBON
MONOXIDE POISONING,
EXPLOSION, PROPERTY
DAMAGE, PERSONAL INJURY OR
DEATH. See the conversion kit
index supplied with the furnace.
This index identifies the proper LP
Gas Conversion Kit required for
each particular furnace.
IMPORTANT: Any additions,
changes or conversions required for
the furnace to satisfactorily meet the
application should be made by a
qualified installer, service agency or
the gas supplier, using factory-
specified or approved parts.
IMPORTANT: Connect this furnace
only to gas supplied by a commercial
utility.
IMPORTANT: A U.L. recognized
fuel gas and CO detector(s) are
recommended in all applications,
and their installation should be in
accordance with the manufacturer's
recommendations and/or local laws,
rules, regulations or customs.
GAS PIPING
Install the gas piping according to all
local codes and regulations of the
utility company.
If possible, run a separate gas supply
line directly from the meter to the
furnace. Consult the local gas
company for the location of the
manual main shut-off valve. The gas
line and manual gas valve must be
adequate in size to prevent undue
pressure drop and never smaller
than the pipe size to the com-
bination gas valve on the furnace.
Refer to Table 3 for the recom-
mended gas pipe size. See Figure 37
for typical gas pipe connections.
36
FIGURE 37
GAS PIPING INSTALLATION
MAIN GAS
VALVE
BURNERS
4 TO 5 FEET
ABOVE FLOOR
REQ'D BY
SOME
UTILITIES.
GROMMET
(IN NORMAL
POSITION)
DRIP LEG
UNION
MAIN GAS
VALVE
4 TO 5 FEET ABOVE
FLOOR REQ'D BY
SOME UTILITIES.
GROMMET
(IN NORMAL
POSITION)
DRIP LEG
UNION
DRIP LEG
BURNERS
MANIFOLD
IMPORTANT: DO NOT RUN A FLEXIBLE GAS CONNECTOR INSIDE THE
UNIT. Extend the 1/2" black pipe from the gas valve to the outside of the cabinet.
Connect any flexible gas connector from there to the gas piping.
UPFLOW
GROMMET
TOP VIEW OF GAS LINE AND VALVE
IN OPT. POSITION
GAS VALVE
DOWNFLOW
TOP VIEW OF GAS LINE AND VALVE
IN OPT. POSITION
BURNERS IGNITOR
HORIZONTAL
MANUAL GAS VALVE
UNION
GAS VALVE
NOTE: WHEN GAS LINE
IS IN OPT. POSITION,
SWAP LOCATION OF
GROMMET AND PLUG.
OPT. GAS LINE
POSITION
PLUG
(IN NORMAL
POSITION)
MANIFOLD
PRESSURE
TAP
IGNITOR
MANIFOLD
GROMMET
NOTE: WHEN GAS
LINE IS IN OPT.
POSITION, SWAP
LOCATION OF
GROMMET AND
PLUG.
GAS VALVE
PLUG
(IN NORMAL
POSITION)
MANIFOLD
PRESSURE
TAP
I328
MANIFOLD
I524