Rheem RGRJ series Installation Instructions Manual page 33

LP CONVERSION
The valve can be converted to use
liquified petroleum (LP) gas by
replacing the pressure regulator
spring with the conversion kit spring.
This LP kit spring allows the regulator
to maintain the proper manifold
pressure for LP gas. The correct
burner LP orifices are included in
the kit. See Figure 38.
NOTE: Order the correct LP
conversion kit from the furnace
manufacturer. Furnace conversion
to LP gas must be performed by a
qualified installer, service agency
or the gas supplier.
To change orifice spuds for either
conversion to LP or for elevation:
1. Shut off the manual main gas
valve and remove the gas
manifold.
2. Replace the orifice spuds.
3. Reassemble in reverse order.
Consult the following table if there is
any question concerning orifice
sizing.
ORIFICE SIZES
US 0 - 7999 FT. 8000 FT. & ABOVE
Natural Gas #50
LP Gas 1.15 mm 1.10 mm
CANADIAN 0 - 2000 FT. 2001-4500 FT.
Natural Gas #50
LP Gas 1.15 mm 1.15 mm
4. Turn the gas supply back on and
check for proper operation and
manifold pressure. See Figures
39, 40 and 41.
5. Attach the notice label alerting
the next service technician that
the furnace has been converted
to LP gas.
NOx MODELS
IMPORTANT: NOx inserts are not
required when operating this
furnace on LP gas.
When converting furnaces equipped
with NOx inserts to LP gas, remove
the NOx insert assemblies. Steps for
removal are listed below:
1. Turn off all electrical power and
the gas supply to the furnace.
2. Remove the burner door from the
furnace.
3. Remove the igniter assembly –
handle with care.
FIGURE 38
LP KIT CONTENTS
4. Remove the two screws
attaching the NOx insert retainer
brackets to the center panel. Pull
the retainer rod.
#51
5. Put the two screws back into the
holes in the center panel.
#50
FIGURE 39
HOSE CONNECTION TO LINE PRESSURE TAP
6. Re-install the igniter and burner
assemblies.
7. Replace burner door.
8. Turn on electrical power and gas
supply to the unit.
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