From inside (document excerpt):
58UVB Direct Vent Upflow Variable Capacity Condensing Gas Furnace For Sizes 060 120, Series 120 Installation, Start Up and Operating Instructions Visit www.Carrier.com NOTE: Read the entire instruction manual before starting the installation. NOTE: This furnace can be installed as a (2-pipe) direct vent or as an optional ventilated combustion air application. NOTE: Special Venting Requirements for Installations in Canada Installation in Canada must conform to the requirements of CSA B149 code.
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Vent systems must be composed of pipe, fittings, cements, and primers listed to ULC S636. The special vent fittings and accessory concentric vent termination kits and accessory external drain trap have been certified to ULC S636 for use with those IPEX PVC vent components which have been certified to this standard. In Canada, the primer and cement must be of the same manufacturer as the vent system – IPEX System 636, PVC/CPVC Primer, Purple Violet for Flue Gas Venting and IPEX System 636(1)t, PVC Cement for Flue Gas Venting, rated Class IIA, 65 deg C. must be used with this venting system – do not mix primers and cements from one manufacturer with a vent system from a different manufacturer. Follow the manufacturer’s instructions in the use of primer and cement and never use primer or cement beyond its expiration date. The safe operation, as defined by ULC S636, of the vent system is based on following these installation instructions, the vent system manufacturer’s installation instructions, and proper use of primer and cement.