The 2228741 assembly is compatible with a wide range of Daikin-McQuay air handlers

Designed for high-performance modulation in mid-sized commercial HVAC systems

this unit utilizes No

while the 24V architecture includes dedicated terminals for flame sensing (SENSE) and burner grounding (GND)

The Trane CNT1538 is a professional-grade ICM fan control board engineered to deliver precise fan speed modulation and sequence timing for Trane heating and cooling equipment

Siemens Building Technology 188-0033 Thermostat 321894-708 The 2228741 assembly is compatibleThe Siemens Building Technology 188 0033 is a specialized unit mounted hot water replacement thermostat engineered for high demand commercial heating applications. Designed specifically for hydronic HVAC heating control, this analog controller provides precise temperature regulation for terminal units including fan coils and unit heaters. As a critical HVAC replacement part, it enables contractors to restore legacy system performance without the