This function prevents a cold draft from being released at the beginning of Heating Operation or during operation of the room temperature thermo.
Temperature of coil temperature sensor
117°F (47°C)
90°F (32°C)
Fan speed
Set speed
LL
Change in Fan Speed
● When Heating Operation is started with the temperature of the heat exchanger less than 90°F (32°C): ● Until the temperature of the heat exchanger goes over 117°F (47°C), fan speed varies according to the
Temperature of | Less than 90°F (32°C) | 90 – 117°F (32 – 47°C) | Over 117°F (47°C) | |
heat exchanger | ||||
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Fan speed | LL | LL – Set speed | Set speed | |
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temperature of the heat exchanger.
● Once the temperature of the heat exchanger rises over 117°F (47°C), cold draft prevention function is released.
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