Installed 4 ton 2 stage Carrier Equipment. Installed Ecobee pro thermostat. Installed new extended supply plenum. Installed new return plenum. Installed new metal collars and sealed all connections with mastic air lock. Installed propane conversion kit. Replaced secondary drain pan. Rebuilt and insulated primary drain line. Cleared drain and verified operation. Installed SS2 safety switch. Pressure tested lineset and pulled a vacuum. Replaced disconnect and whip at outdoor unit. Charged system to meet manufacturer specifications. Everything is working at completion of service.