Rheem RGRA SERIES, Installation Instructions Manual

Page: 27 / 64

FIGURE 29
DOWNFLOW CONDENSATE DRAIN
CONDENSATE DRAIN/NEUTRALIZER
27
FIGURE 28
UPFLOW CONDENSATE DRAIN
GENERAL INFORMATION
DO NOT RUN DRAIN OUTDOORS.
FREEZING OF CONDENSATE CAN
CAUSE PROPERTY DAMAGE.
IMPORTANT: Do not connect into a
common drain line with an air con-
ditioner evaporator coil drain located
below the furnace. A blocked or
restricted drain line can result in over-
flow of the coil pan and negate the
furnace blocked drain shutoff control.
FILL TRAP ASSEMBLY WITH
WATER BEFORE OPERATING THE
FURNACE.
This can be done by
removing the drain hose
from the trap and pouring about a
cup of water into the vent trap. Water
will flow into the house drain when the
trap is full.
If local codes require, install a
condensate neutralizer cartridge in
the drain line. Install cartridge in
horizontal position only. Also install
an overflow line if routing to a floor
drain. See Figures 28 and 29.
If no floor drain is available, install a
condensate pump that is resistant to
acidic water. Pumps are available
from your local distributor. If pump
used is not resistant to acidic water, a
condensate neutralizer must be used
ahead of the pump. The condensate
pump must have an auxiliary safety
switch to prevent operation of the
furnace and resulting overflow of
condensate in the event of pump
failure. The safety switch must be
wired through the “R” circuit only (low
voltage) to provide operation in either
heating or cooling modes.
UPFLOW MODELS
The condensate drain trap is located
in the blower compartment on the left-
hand side of the jacket. A short piece
of
1 /
2
-in. PVC pipe and a 1 /
2
-in. tee are
provided. Connect the
1
/
2
-in. pipe to
the elbow on the trap and the tee to
this pipe so that the open end is
upward. Connect at least a 5
(
riser to
the top of the tee and run a drain tube
from the bottom of the tee to a floor
drain or condensate pump.
IMPORTANT: If installing the unit
over a finished ceiling or living area,
be certain to install an auxiliary
condensate drain pan under the
entire unit extending out under the
condensate tee. With a 5 inch riser
installed above the tee, a blocked
drain will result in overflow from the
riser.
To cause the furnace to shut down
when a blocked drain is present,
install a riser which is a minimum of
10
13 ⁄
16
(
. If the furnace is installed in an
attic, crawlspace or other area where
freezing temperatures may occur, the
furnace drain can freeze while shut
off for long periods of time.
Use a solvent cement that is
compatible with PVC material. Cut the
drain hoses to the appropriate length
and connect to the trap with hose
clamps. Tighten the clamps with
pliers and check for leaks after
attaching.
DOWNFLOW MODELS
The condensate trap is located on the
right side of the cabinet in the burner
compartment. A short piece of
1
/
2
-in.
PVC pipe and a 1 /
2
-in. tee are
provided. Connect the
1
/
2
-in. pipe to
the elbow on the trap and the tee to
this pipe so that the open end is
upward. Connect a 5
1 ⁄
2
-in. riser to the
top of the tee and run a drain tube
from the bottom of the tee to a floor
drain or condensate pump. Use a
solvent cement that is compatible with
PVC material.
!
CAUTION
NEUTRALIZER CARTRIDGE
(OPTIONAL)
TO FLOOR DRAIN OR CONDENSATE PUMP
NOTE:
DRAIN VENT NEEDS
TO BE ABOVE
COLLECTOR BOX
DRAIN SPOUT.
MINIMUM HEIGHT
OPEN TOP
CONDENSATE TRAP
DRAIN LINE
I408
OVERFLOW LINE
(REQUIRED ONLY WHEN
OPTIONAL NEUTRALIZER
CARTRIDGE IS USED.)
I408
MINIMUM HEIGHT
OPEN TOP
DRAIN LINE CONDENSATE TRAP
TO FLOOR DRAIN OR CONDENSATE PUMP
NEUTRALIZER CARTRIDGE
(OPTIONAL)
OVERFLOW LINE
(REQUIRED ONLY WHEN
OPTIONAL NEUTRALIZER
CARTRIDGE IS USED.)
5
(