The SZ1020 Series features: 
• Stand-alone or network operation 
• 7-day time clock 
• Discharge air sensor input with high and low limits 
• Conventional model offers up to three heating and two cooling stages, or two heating and three cooling stages 
• Heat pump model offers two compressor stages, two auxiliary heat stages and a configurable reversing valve output 
• Adjustable delay on power-up and start-up for soft starts 
• P+I control option 
• Smart recovery 
• No battery backup required 
• Minimum on/off times for HVAC equipment protection 
• 32-character LCD display 
• Six status LEDs 
• Remote room sensing capability 
• User setpoint adjustment limits 
• Local override and remote override capability 
• System and fan switching with access lockouts 
• Auxiliary time clock output (economizers) 
• Fan interlock safety option 
• Filter service input and indication 
• Equipment monitoring inputs and indication 
• External time clock input 
• Energy management input for setpoint shift 
• Access to programming or schedule may be locked out or limited with the use of an access code 
• Fahrenheit or Celsius temperature display