Installed Payne 3 1/2 ton heat pump. Installed Ecobee thermostat. Replaced secondary pan. Rebuilt, primed and cleared primary drain line. Rebuilt secondary drain. Installed SS2 and SS3 Safety switches. Reattached return and supply plenums. Sealed all connections with mastic air lock. Replaced disconnect and whip at outdoor condensing unit. Reinsulated suction line and ran low voltage in seal-tite. Pressure tested and pulled a vacuum on the copper line set. Tested system operation and charged to meet manufacturer specifications. Everything is working at completion of service.