Aprilaire 8400 owner manual To cancel the permanent override press

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Operation & Programming – PROGRAMMABLE MODELS ONLY (8463, 8465, 8466) Program schedule overrides (temporary, permanent)

Temporary program override

Permanent program override

Press or to immediately adjust the temperature. This will temporarily override the temperature setting for the current programmed time period. The new temperature setting will be maintained until the next time period of the programmed schedule.

To cancel the temporary override, adjust the temperature setting back to the programmed temperature.

Press to permanently hold the temperature at its current setting. This will override the temperature settings for all time periods of the programmed schedule. With the thermostat in permanent override the thermostat temperature can be manually adjusted and will stay at that setting until the override is cancelled.

To cancel the permanent override press ..

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61000651B 8400 Tstat Owners.indd 11

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Contents Series Thermostats Table of contents About your new thermostat Thermostat Features All 8400 series thermostatsHow to identify your thermostat’s model number Controls & display overview models 8444, 8446 About your new thermostat Non-programmable modelsControls & display overview models 8463, 8465 About your new thermostat Programmable ModelsPress Change temperature setTINGOperation ALL Models Battery installation and reset button Select fan setting ON/AUTO/CIRCReset service reminder messages Understanding program schedules Set time and dayExample Progressive recoveryChanging program schedules To cancel the permanent override press Warranty Registration Electronic Thermostat Five Year Limited Warranty