Installed Carrier 3 ton furnace. Installed new plywood overlay. Installed new supply plenum and sealed all connections with mastic. Rebuilt and insulated primary drain line. Cleared drain and verified operation. Installed SS2 safety switch. Replaced disconnect and whip at outdoor system. Reinsulated suction line and ran low voltage in seal tite. Sealed lineset penetration with expanding foam. Tested system and charged to meet manufacturer specifications. Everything is working at completion of service.