Installed new 2.5-ton Carrier gas system. Installed new Honeywell thermostat. Installed new plywood overlay. Installed new filter base. Installed new gas shut off valve. Rebuilt and insulated condensate drain line. Added SS2 safety float switch. Cleared and treated drain and verified operation. Transitioned to supply plenum and sealed with mastic air lock. Installed new filter dryer, pressure tested with dry nitrogen and pulled a vacuum on the copper line set. Replaced disconnect and whip at outdoor system. Verified system is to factory spec. System is working properly at time of departure.