Gas Piping - Rheem (-)802PA050314MSA Installation Instructions Manual

GAS SUPPLY

GAS PIPING

THIS FURNACE IS EQUIPPED AT THE FACTORY
FOR USE ON NATURAL GAS ONLY. CONVERSION
TO LP GAS REQUIRES A SPECIAL KIT IS AVAIL-
ABLE AT THE DISTRIBUTOR. 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 SUP-
PLIED WITH THE FURNACE. THIS INDEX IDENTI-
FIES 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 or commercial fuel provider.
IMPORTANT: A U.L. or CSA recognized fuel gas and CO detec-
tor(s) are recommended in all applications, and their installation
should be in accordance with the detector manufacturer's recom-
mendations and/or local laws, rules, regulations or customs.
Install the gas piping according to all local codes, state codes and
regulations of the utility company, whichever holds jurisdiction.
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 combination
gas valve on the furnace. Refer to Table 6 for the recom mended
pipe size for natural gas and Table 7 for LP gas pipe sizes.
IMPORTANT: It is permissible to run flexible gas connector inside
the unit to a piece of black pipe. If local codes allow the use of a
flexible gas appliance connector, always use a new listed connec-
tor. Do not use a connector which has previously serviced another
gas appliance. Massachusetts law limits flexible gas connectors to
a maximum of 36".
Install a ground joint union outside the cabinet and within 3
feet to easily remove the control valve assembly. Install a
manual shut-off valve in the gas line outside the furnace cas-
ing. The valve should be readily accessible to turn the gas supply
on or off. Install a drip leg in the gas supply line as close to the fur-
nace as possible. Always use a pipe compound resistant to the
action of liquefied petroleum gases on all threaded connections.
24
IMPORTANT: When making gas pipe connections, use a back-up
wrench to prevent any twisting of the control assembly and gas
valve. Do not overtighten the connection.
Any strains on the gas valve can change the position of the gas
orifices in the burners. This can cause erratic furnace operation.
IMPORTANT: ENSURE that the furnace gas control valve not be
subjected to high gas line supply pressures.
DISCONNECT the furnace and its individual shut-off valve from
the gas supply piping during any pressure testing that exceeds
1/2 PSIG (3.48 kPa).
FIGURE 19
GAS PIPING INSTALLATION
GAS PIPE INSTALLATION
MANUAL GAS VALVE
(IN CLOSED
POSITION)
4 TO 5 FEET
ABOVE FLOOR
REQ'D BY SOME
UTILITIES
DRIP LEG
UNION
MANUAL GAS VALVE
(IN CLOSED POSITION)
4 TO 5 FEET
ABOVE FLOOR
REQ'D BY SOME
UTILITIES
DRIP LEG
DIRECT
SPARK
IGNITOR
BURNERS
FLAME SENSOR
UPFLOW
GAS VALVE
MANIFOLD
DIRECT SPARK
BURNERS
IGNITOR
FLAME SENSOR
HORIZONTAL
DUCT
UNION
GAS VALVE
MANIFOLD