Heating or cooling sequence

Automatic heating/cooling changeover (with sensor QAH11.1)

Operating mode changeover input for remote control

Output for electrical heater

2-position control

Selectable switching differential (1 K heating, 0.5 K cooling, or 4 K heating, 2 K cooling)

Selectable dead zone (2 K or 5 K)

Input for return air temperature sensor (QAH11.1)

Frost protection mode

Outputs for 3-speed fan (0 / I / II / III)