Rheem RGRK-12ERAJS Series Installation Instructions Manual page 32

CONNECTING TO FURNACE
IMPORTANT: Clean and debur all
pipe cuts. The shavings must not be
allowed to block the exhaust,
combustion air or condensate drain
pipes.
UPFLOW FURNACE
The exhaust pipe connection is a 2-in.
female PVC pipe fitting extending
through the left side of the furnace top
plate. This opening has a protective
cap which should be removed just
prior to installing the exhaust pipe.
When 2-in. pipe is used, connect it
directly to this fitting. When 3-in. pipe
is used, connect a 2 to 3-in. coupling
to this fitting with a short piece of 2-in.
PVC pipe.
The combustion air connection
is at the right side of the top plate.
An alternate combustion air
connection may be made on the right
side of the jacket. This opening has a
plastic cap. A combustion air
connection fitting is supplied with the
furnace and it must be installed in the
furnace by screwing it into the
opening. Make sure the rubber
"O-ring" supplied with the furnace is
used with this fitting. See Figure 27.
DOWNFLOW/HORIZONTAL
FURNACE
The exhaust pipe connection is a 2-in.
female PVC pipe fitting extending
through the right side of the furnace
top cover. This opening has a pro-
tective cap which should be removed
just prior to installing the exhaust
pipe. When 3-in. pipe is used,
connect a 2 to 3-in. coupling to this
fitting with a short piece of 2-in. PVC
pipe.
The combustion air connection is a 2-
in. extruded hole on the left side of
the top plate. When a 2-in. pipe is
used, attach a 2-in. PVC coupling
over this hole with RTV sealant, drill
two pilot holes, and add two sheet
metal screws through the coupling
into the extrusion to secure it in place
before piping. When 3-in. pipe is
used, connect a 2 to 3-in. coupling to
this fitting with a short piece of 2-in.
PVC pipe. See Figure 28.
32
FIGURE 27
UPFLOW COMBUSTION AIR AND VENT PIPE CONNECTION
"O" RING
TOP PLATE
EXHAUST
VENT CAP/PLUG
EXHAUST
OUTLET AIR PIPE
EXHAUST TRANSITION
CONNECTOR
CONDENSATE TRAP
DRAIN HOSES
(AS SHIPPED FROM
FACTORY)
FIGURE 28
DOWNFLOW/HORIZONTAL COMBUSTION AIR AND VENT PIPE CONNECTION
TOP PLATE
COUPLING
NOTE:
ATTACH COUPLING TO
EXTRUDED COLLAR
WITH TWO SCREWS. PUT
BEAD OF SILICONE
AROUND BASE BEFORE
MOUNTING COUPLING.
COMBUSTION
AIR CHASE
INDUCED DRAFT
BLOWER
COMBUSTION
AIR ADAPTER
NOTE:
WHEN COMBUSTION AIR IS IN
OPTIONAL POSITION SWAP LOCATION
OF 2" PVC MALE ADAPTER AND "O"
RING WITH PLUG.
PLUG OPT. COMBUSTION
AIR POSITION
INDUCED DRAFT
BLOWER
I329
EXHAUST VENT
CAP/PLUG
EXHAUST
PIPE - PVC
EXHAUST
CONNECTOR
EXHAUST
OUTLET AIR PIPE
EXHAUST
TRANSITION
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