TCS SZ2166 Chiller Controller

TCS SZ2166 Chiller Controller

TCS SZ2182 Advanced Air Handling Unit Controller

Advanced AHU Controller 6 RTD inputs, 5 digital inputs, 4 analog inputs 4 analog outputs, 8 digital outputs
Availability: In stock


The SZ2182 is designed to control constant volume and variable air volume air handling units that require advanced control functionality such as dehumidification, face & bypass control or humidity & carbon dioxide sensor sharing.


• Stand-alone or network operation

• 365-day time clock with two holiday schedules with automatic leap year and daylight savings correction

• Discharge air sensor input with high and low limits and reset.

• Hot deck/cold deck control with night zone option

• Outdoor air sensor input with heating & cooling lockouts

• Six stages for either heating or cooling

• Modulating output for heating and/or cooling

• Modulating economizer output with digital or analog enthalpy options

• Modulating output for fan or damper control

• Programmable minimum run times

• Adjustable delay on power-up for soft starts

• PID control options

• Smart Recovery

• Fifteen status LEDs

• Remote setpoint capability

• User setpoint adjustment limits

• Local override and remote override capability

• Carbon dioxide demand control ventilation

• Auxiliary time clock output

• Fan interlock safety option

• Equipment monitoring inputs and indication

• External time clock input

• Dehumidification sequences with integrated or external reheat

• Face & Bypass control sequence

• Outdoor air humidity sharing capability

• Carbon dioxide sensor sharing capability

• Pre-occupied purge sequence

• Heat pump control functions


General Accuracy: +/- 0.5%
Programming: EIA RS485 interface
Communications: RS485, half duplex
Memory backup: Non-volatile EEPROM, no battery required
Program Setting: 2 events per day with 7 days per week and 2 holiday schedules (12 periods of up to 99 days each)
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: Six 1000 Ω PRTD, momentary override,  4 to 20mA analog and 5 digital (dry contact)
Range: Space and Return: 20 to 120°F
Discharge Air Temp: 20 to 220°F
Mixed Air Temp: 20 to 220°F
Outdoor Air Temp: -40 to 160°F
Outputs: Eight digital (SPST dry contact, 24 VAC @ 2A), and four 4-20 mA DC analog
Max. Load Resistance (analog output): 600 Ω
Common mode rejection: 100 db @ 60 Hz
Power Consumption: 15 VA max.
Specifications subject to change without notice.

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