PRODUCT DESIGN
54
• If the drain line is routed through an area which may
see temperatures near or below freezing, precau-
tions must be taken to prevent condensate from
freezing within the drain line.
• If an air conditioning coil is installed with the
furnace, a common drain may be used. An open
tee must be installed in the drain line, near the
cooling coil, to relieve positive air pressure from the
coil’s plenum. This is necessary to prohibit any
interference with the function of the furnace’s drain
trap.
UPRIGHT INSTALLATIONS
In an upright installation drain hoses are connected to drain
ports on the rubber elbow and the recouperator coil front
cover. The drain lines are then routed through the right or left
side panel and into the drain trap secured to the outside of
the cabinet.
NOTE: Refer to Condensate Drain Lines and Drain Trap -
Alternate Vent/Flue Hose Connections section in this manual
or the installation instructions for upright installations using
an alternate vent/flue outlet.
Standard Right or Left Side Drain Hose Connections
Upright installations using the standard vent/flue outlet re-
quire drain hoses to be connected as shown in the following
figures.
NOTE: For left side drainage, grommets will have to be relo-
cated to left side panel.
DRAIN
TRAP
FRONT COVER
DRAIN PORT
TUBE(S) 2
GREEN
HOSE
CLAMPS
(3 PLACES)
RIGHT SIDE
PANEL
RUBBER ELBOW
DRAIN PORT
TUBE 1
SIDE PANEL
GROMMET
HOLES
HOSE
B
HOSE
A
RUBBER
ELBOW
RED HOSE
CLAMP
RED HOSE CLAMP
90% Furnace Upright “Standard”
Drain Hose Connections (Right Side)
LEFT
SIDE PANEL
FRONT COVER
DRAIN PORT
HOSE A
SIDE PANEL
GROMMET
HOLES
TUBE(S) 2
DRAIN
TRAP
GREEN HOSE
CLAMPS
(3 PLACES)
TUBE 1
RUBBER
ELBOW
HOSE B
RUBBER
ELBOW
DRAIN PORT
RED HOSE
CLAMP
RED HOSE
CLAMP
90% Furnace Upright “Standard”
Drain Hose Connections (Left Side)
NOTE: Ensure hoses and tubes maintain a downward slope
for proper drainage and that they are not kinked or binding.
Alternate Vent/Flue Drain Hose Connections
Upright installations using the alternate vent/flue outlet will
require "right-side only" drain hoses to be connected as
shown in the following figure. Refer to Vent/Flue Pipe and
Combustion Air Pipe section in this manual or the installa-
tion instructions for details on alternate vent/flue pipe con-
nection.
RUBBER ELBOW
(EXTERNALLY
MOUNTED)
TUBE 1
HOSE
CLAMPS
(5 PLACES)
HOSE B
TUBE(S) 2
DRAIN TRAP
SIDE PANEL
GROMMET
HOLES
HOSE A
FRONT COVER
DRAIN PORT
RUBBER
ELBOW
DRAIN PORT
90% Furnace Upright “Alternate”
Drain Hose Connections (Right Side Only)
NOTE: Ensure hoses and tubes maintain a downward slope
for proper drainage and are not kinked or binding.
For details concerning mounting of the drain trap, refer to
the following section.
Upright Drain Trap Mounting (Left or Right Side
Panel)
1. Insert drain tubes into drain trap and position the drain
trap against the side panel. NOTE: Drain tubes must
reach the bottom of the drain trap.
2. Secure drain trap to side panel at the mounting holes
located below the grommet drain holes.
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