User Guide

This thermostat requires 24 Volt AC Power or two (2) properly installed
“AA” Alkaline batteries for proper operation. When connecting 24 Volt
AC Power the batteries may be installed as a backup.
For use only as described in this manual. Any other use
will void warranty.
1020NC
Single Stage Heat / Cool
Conventional and Heat Pump
1 Specifications
2 About Your Thermostat
3 Installation
4 System Testing
5 Setting User Options
6
Operating Your Thermostat
7 Additional Operation Features
8 Thermostat Maintenance
®
Warning
Turn off power to the heating or cooling
equipment before installation.
Attention
For installation by experienced service
technicians only.
1220NC
Up to 2 Heat / 1 Cool
Conventional and Heat Pump
Read all instructions before proceeding.
This thermostat is compatible with:
  • Singlestageheat/coolconventionalandheatpumpsystems
  • Conventionalsystemsupto2heat/1cool(1220NConly)
  • Singlecompressorheatpumpsystemswithanauxiliaryheatstage(1220NConly)
  • 250–750millivoltheatonlysystems
Electrical and control specifications:
 •ElectricalRating:24VoltAC
  •1ampmaximumloadperterminal
  •ACPower:18–30VoltsAC
  •DCPower:3.0VoltDC(2“AA”AlkalineBatteriesIncluded)
  •ControlRange:45°–90°F(7°–32°C)
  •TemperatureAccuracy:+/-1°F(+/-.5°C)
Terminations
  •1020NC–Rc,Rh,O,B,Y1,W1,G,C
  •1220NC–Rc,Rh,O,B,Y1,E/W1,G,W2,C
1
Specifications
1020NCW-100-03
Non-Programmable
Thermostats
Model number is located on back of thermostat
Detailed
Installer Guide