Thank you for purchasing a Robertshaw RS4000C thermostat. This
user’s manual will guide you through the setup of the RS4220C two
stage, and the RS4320C three stage* thermostats. The thermostat
should already be mounted and correctly wired. The default settings
will enable the thermostat to operate efficiently.
Features
• Pop-Up Wizard
• Automatic changeover
• Circulating Fan
• Worry-Free memory retention
• Easy change battery
• Large back lit display
• Filter change reminder
• Low battery indicator
• Fahrenheit and Celsius displays
• Dual power
• Adjustable 1
st
stage temperature differential: 0.5 °F to 3.0 °F (0.5 °C
to 1.5 °C)
• Accuracy within ±1 °F
• Universal staging on multi-stage units
• Automatic heating shutdown if temperature exceeds 99 °F (37 °C)
• Keypad security lockout
• User settable Hi and Lo temperature limits
1
RS
4220C
RS
4
3
20C
352-00058-001 Rev B
USERS MANUAL
* Three stage heating available for heat pump applications only.
