18-CD33D1-4 25
Installer’s Guide
CONDENSATE DRAIN INSTRUCTIONS
▲
CAUTION
!
IT IS RECOMMENDED THAT A DRAIN PAN BE INSTALLED
UNDER THE FURNACE TO PREVENT PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH FROM LEAKING CONDEN-
SATE.
VERTICAL APPLICATIONS
Upflow furnace - The connection tubing for left and right
side drainage is shipped in the blower compartment. In-
stall the connection tubing from the trap to the side of the
unit and trim all excess tubing to avoid kinks. See Fig-
ures 40 and 42.
Downflow furnace - Use RTV silicon sealant to connect
the fitting to the trap for ease of removal when cleaning
the trap.
For left side drain a 1/2" slip PVC fitting is needed. See
Figure 44.
To change to a right side drain, remove the drain
lines from the trap, rotate the trap 180° so it exits to
the right, then reconnect the lines. Start with a 1/2"
90° CPVC street elbow connected to the trap us-
ing RTV silicon sealant. Run 1/2" CPVC pipe to a
CPVC elbow. Run 1/2" CPVC pipe from the elbow
out through the right side knock-out. See Figure 45.
HORIZONTAL APPLICATIONS
Upflow and Downflow furnaces - All horizontal applications
are left side only. It is always recommended that the auxiliary
drain pan be installed under a horizontally installed evapo-
rator and/or 90% gas furnace. Connect the auxiliary drain
Right side
UPFLOW (VERTICAL)
UPFLOW HORIZONTAL
17" UNITS
(Left side only)
Use Inducer Drain
hose without
extension
UPFLOW (VERTICAL)
Left side
/
!
@
Use exten-
sion hose
here
UPFLOW HORIZONTAL 21" & 24" UNITS
(Left side only)
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