York G8C, GF8 service manual 035-19992-001 Rev. a Unitary Products Group

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035-19992-001 Rev. A (0404)

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Unitary Products Group

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Contents Safety Table of ContentsSection I USER’S Information Contact InformationDescription 150 MBH Input Models Description 50-125 MBH Input ModelsBurner Flame Drawing Instructions for Examining the Furnace InstallationHOW Your GAS Furnace Works Furnace User MaintenanceSTART-UP and Shutdown Instructions Operating InstructionsRemoving Filters Air FiltersExternally Mounted Air Filters Safety Section Section II Service and Maintenance ManualFurnace Maintenance Section Furnace Cleaning SectionSequence of Operation Cleaning the Heat ExchangerContinuous Blower Intermittent Blower CoolingFurnace Control Diagnostics TroubleshootingHot Surface Ignition System Ignition Control Description Section III Replacement Parts ListField Installed Accessories NON-ELECTRICAL Replacement Part Contact InformationWiring Diagram Unitary Products Group Section IV Wiring Diagram035-19992-001 Rev. a Unitary Products Group 035-19992-001 Rev. a 035-19992-001 Rev. a Unitary Products Group Unitary 5005 Norman Products York Group Drive 73069 Exclusions