Honeywell RTH221 Operation Manual

About Honeywell RTH221 Operation Manual

In this Honeywell RTH221 Operation Manual explain about your thermostat has a feature that helps prevent damage to the compressor of your air conditioning system. Because damage can occur if the compressor is restarted too soon after shutdown, this feature forces the compressor to wait five minutes before restarting. During the wait time, the message Cool On flashes on the screen When the safe wait time has elapsed, the message stops flashing and the compressor turns on.

Honeywell RTH221 Technical Data

Power Supply

  • 2 AAA batteries

Maximum Load

  • 1 A @ 24 VAC per output

Temperature Ranges

  • Heat: 40 °F to 90 °F (4.5 °C to 32 °C)
  • Cool: 50 °F to 99 °F (10 °C to 37 °C)

Operating Ambient Temperature

  • 32 °F to 122 °F (0 °C to 50 °C)

Shipping Temperature

  • -40 °F to 130 °F (-40 °C to 55 °C)

Operating Relative Humidity

  • 5% to 90% (non-condensing)

Physical Dimensions (H x W x D)

  • 4.7” x 2.9” x 1.1” (120 mm x 74 mm x 28 mm)

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Honeywell RTH221 Manual


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