Thermo Pride CHX3-75N Installation And Operation Manual page 26

All installations and services must be performed by qualified service personnel.
Figure 8: Required Exhaust Vent and Air Intake Piping for CDX3 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 CDX3 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 model CDX3-75, a length of 2-inch diameter PVC pipe and a 2-inch
diameter PVC tee assembly are supplied with each furnace. For the models CDX3-100 and
CDX3-125, a 3-inch x 2-inch diameter PVC reducer is also supplied.
NOTICE: For models CDX3-100 and CDX3-125 used in horizontal applications,
immediately transition from 2-inch to 3-inch diameter pipe by installing the 3-inch x 2-inch
diameter PVC reducer just outside the furnace casing. The remainder of the venting system
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