SZ1022
Programmable 7-Day Thermostat
Description
The SZ1020 Series has a 7-day time clock. The
SZ1022 is designed to control conventional heating
and cooling. The SZ1024 is designed to control heat
pumps and can be converted to conventional mode
in programming.
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
Call to order:
1-800-288-9383
Specs & Docs
Specifications:
General
Accuracy:
+/- 1ºF at 75ºF
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 V
AC
+/- 20%
Inputs:
Built-in and r
emote platinum
RTDs,
momentary over
ride 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.
Specifications subject to change without notice.