Lennox International Inc. 81M28 - Manual (Page 2)

IMPORTANT SAFETY INFORMATION
WARNING:
• DO NOT USE WITH COMMERCIAL EQUIPMENT.
• Always turn off power at the main power source by unscrewing fuse or switching circuit
breaker to the off position before installing, removing, or cleaning this thermostat.
• Read all of the information in this manual before programming this thermostat.
• This is a 24V AC low-voltage thermostat. Do not install on voltages higher than 30V AC.
• All wiring must conform to local and national building and electrical codes and ordinances.
• Do not short (jumper) across terminals on the gas valve or at the system control to test
installation. This will damage the thermostat and void the warranty.
• Do not connect ground to any terminal in this unit.
• This thermostat is equipped with automatic compressor protection to prevent potential
damage due to short cycling or extended power outages. The short cycle protection provides a
5-minute delay between heating or cooling cycles to prevent the compressor from being dam-
aged.
• Do not switch system to cool if the temperature is below 45°F (7°C). This can damage the cool-
ing system and may cause personal injury.
• Use this thermostat only as described in this manual.
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