SZ2182

Advanced Air Handling Unit Controller

Description

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.

Features:

• 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

Call to order:

1-800-288-9383

Specs & Docs

Specifications:

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.