TCSBASYS SZ1024 HEAT PUMP CONTROLLER - NOS

Description

The SZ1024 is used to control heat pumps. It can be converted to conventional mode in programming.

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

Specifications

General
Accuracy: +/- 0.5%
Display resolution: +/-1°F (0.6°C)
Display: 32-character LCD
Programming: Front panel keypad or EIA RS485 interface
Communications: RS485, half duplex
Memory backup: Non-volatile EEPROM, no battery required
Override: Programmable from 0 to 255 minutes

Environmental
Operating temperature: 32 to 131°F (0 to 55°C)
Operating humidity: 0 to 100% RH, non-condensing
Storage temperature: 14 to 140°F (-10 to 60°C)

Electrical
Supply voltage: 24 VAC +/- 20%
Inputs: Built-in and remote platinum RTDs, momentary override and three digital (dry contact)
Range: Room Temp: 40 to 90 °F (built-in or remote)
Discharge Air Temp: 0 to 150°F (remote)
Outputs: Seven digital (SPST dry contact, 24 VAC @ 2 A)
Common mode rejection: 100 db @ 60 Hz
Power consumption: 8 VA max