Indoor Coil Overheat Protection
Heat Pump Operation
The Overheat Protection is only on the AZ6500 series.
The Overheat Protection system protects the Zoneline from overworking when the outdoor temperature
is too high for heat pump operation. The temperature of the indoor coil is monitored, and if it rises
above 131°F, the control stops the outdoor fan. The Zoneline will resume normal operation when the
coil temperature is less than 122°F.
Indoor Coil Overheat Protection
Indoor Coil
Temperature
Outdoor Fan
Compressor
131°F
122°F
ON
ON
– 20 –