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All installations and services must be performed by qualified service personnel.
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Figure 8: Required Exhaust Vent and Air Intake Piping for CDB1 Furnace in Horizontal Applications.
2. Connecting The Exhaust Vent To The Inducer
a. Slip the end of the 2-inch diameter PVC elbow (for the model CDX1 in horizontal applications, the 2-
inch diameter PVC tee assembly) over the outlet of the inducer blower assembly. Measure the length of
2-inch diameter thermoplastic pipe needed to clear the furnace side casing, while allowing for
installation of a 2-3/8 inch length of reinforced rubber hose, used as a coupling, within the casing of the
furnace. Cut the measured lengths of 2-inch diameter PVC pipe being sure to allow a sufficient length
of pipe for connections. Refer to Figures 9, 10 and 11 for assembly details.
NOTICE: For the models CDB1-50 / -75, a length of 2-inch diameter PVC pipe and a 2-inch
diameter PVC tee assembly are supplied with each furnace. For the models CDB1-100 / -125, a 3-inch
x 2-inch diameter PVC reducer is also supplied.