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From inside (document excerpt):
Infinity ICS Model 58MVC Direct Vent 4 Way Multipoise Condensing Gas Furnace With IdealComfortt IdealHumidityt Installation Instructions NOTE: Read the entire instruction manual before starting the installation. This furnace can be vented as a direct vent (2-pipe) or as an optional ventilated combustion air application. Furnaces installed in Canada must use Vent Systems that are certified to the Standard for Type BH Gas Venting Systems, ULC-S636.
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ULC-S636 certified plastic vent system material or the components of ULC-S636 certified vent systems must not be interchanged with other vent systems or unlisted pipe/fittings. Vent components supplied with the furnace and components in factory authorized vent kits may be used with ULC-S636 certified vent systems. The ULC-S636 certified plastic components, and specified primers and glues of the certified system must be from a single-system manufacturer and not mixed with other system manufacturer’s vent system parts. The first 3 ft. (.91M) of the venting system must be readily accessible for inspection. Some Provinces may require the combustion air system to be ULC-S636 certified. NOTE: Please retain these instructions with the furnace after installation for future reference. ama ISO 9001:2000 CERTIFIED REGISTERED As an ENERGY STAR® Partner, Carrier Corporation has determined that this product meets the ENERGY STAR® guidelines for energy efficiency. AIRFLOW UPFLOW HORIZONTAL LEFT DOWNFLOW AIRFLOW HORIZONTAL RIGHT AIRFLOW TABLE OF CONTENTS PAGE IMPORTANT INFORMATION 2 SAFETY CONSIDERATIONS 3 CODES AND STANDARDS 6 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 7 INTRODUCTION 7 APPLICATIONS . 7 Upflow 7 Downflow . 10 Horizontal Left 11 Horizontal Right 14 LOCATION 15 INSTALLATION 17 Air Ducts . 20 Air for Combustion and Ventilation 27 Combustion Air Pipe 33 Vent Pipe 35 Vent Termination 38 Condensate Drain 42 START-UP, ADJUSTMENTS, AND SAFETY CHECK. 43 CHECKLIST . 60 AIRFLOW A93041 Fig. 1 – Furnace Orientation – ! CAUTION FURNACE RELIABILITY HAZARD Failure to follow this caution may result in unit damage. Improper installation or misapplication of furnace may require excessive servicing or cause premature component failure. This furnace can be vented as either a direct vent (2-pipe) furnace or as an optional ventilated combustion air application. A direct vent system shall be installed in accordance with the direct vent (2-pipe) procedures in the Combustion Air and Vent Pipe Systems section within this instruction. For optional ventilated combustion air applications, refer to the ventilated combustion air option procedures in the same section. Application of this furnace should be indoors with special attention given to vent sizing and material, gas input rate, air temperature rise, unit leveling, and unit sizing. Required Notice for Massachusetts Installations IMPORTANT The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA-54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: (a.)For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied: 1. INSTALLATION OF CARBON MONOXIDE DETECTORS.