This motor features an OPSB (Open Slotted Band) enclosure

For effective freeze protection

This microprocessor-based module manages a 10-second trial for ignition (TFI) with a single-try logic

it effectively manages airflow across both heating stages to prevent pressure switch trips and combustion instability

and 881 models

Siemens Building Technology QAA22SS.FWSN Stat 318172-701 This motor features an OPSBThe Siemens QAA22SS. FWSN is a high precision room temperature sensor engineered for seamless integration into Building Automation Systems (BAS). This full featured HMI unit provides technicians with a versatile selectable output signal (0 10V, 0 5V, or 4 20mA), making it compatible with a wide range of HVAC controllers and Terminal Equipment Controllers (TECs). Designed for accuracy, the sensor offers a measurement range of 32F to 122F with a