locked out. Power Exhaust Control (Optional) The power exhaust fan is started whenever the position of the economizer dampers meets or exceed the power exhaust setpoint when the indoor fan is on. The setpoint panel is located in the return air section and is factory set at 25%. The return airflow must be configured in downflow orientation. Lead/Lag Control (Dual Circuit Only) Lead/Lag is a selectable input located on the RTRM. The RTRM is configured from the factory with the Lead/Lag 锁在外面。 动力排气控制 (可选) 电动排气扇 每当 职位 省煤器挡板 达到或超过 权力 排气设定点 室内风扇开着。 设定点面板为 位于返回区 空气部分和 工厂设定为25%。 回流气流必须 配置 顺流而下 方向 超前/滞后控制(双 (仅限电路) 超前/滞后是一个问题 可选输入 位于RTRM上。 这个 RTRM是从 工厂和 超前/滞后